Japanese Journal of Oral and Maxillofacial Surgery
Online ISSN : 2186-1579
Print ISSN : 0021-5163
ISSN-L : 0021-5163
Volume 37, Issue 1
Displaying 1-35 of 35 articles from this issue
  • Ryouji HIRONAKA, Kazuo SANO, Tsugio INOKUCHI
    1991 Volume 37 Issue 1 Pages 1-7
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Decalcification of the bone implant has been performed to accelerate bone induction. Ultrasound applied to rapid decalcification was investigated for immediate reimplantation of the resected jaw bone.
    Atomic absorption analysis of the amount of calcium dissolved into the solution of 0.6N HCl from the bone subjected to decalcification revealed that ultrasonic application markedly shortened decalcification time.
    Observation of ultrasonically decalcified bone matrix using scanning electron microscopy showed deeply perforated bone cavities and smoothly scrubbed hone surfaces, suggesting ultrasonic action to the bone in the decalcification solution
    Histological findings of decalcified bone matrix implanted in the abdominal wall muscles of rabbits indicated that ultrasonic decalcification preserves the bone induction property of the implant.
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  • Masaaki SANO, Kenji KAKUDO
    1991 Volume 37 Issue 1 Pages 8-23
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The purpose of this study was to investigate mechanisms of tooth extraction, with special reference to unusual root shapes. Stress analysis with the use of finite element method was carried out to clarify the mechanical effects of tooth root morphology on the tooth and alveolar bone in tooth extraction, under the cantilever and wedge forces as extraction force. Finite element models of single root and double roots were developed as controls, and both models were modified from average shape to unusual shapes, according to the classification of oral pathology.
    The results obtained were as follows:
    1. The effects of the cantilever force on the root were lower than in the case of the wedge force.
    2. Stresses generated in the root tip area of various models in which the resistance to the loading incleased were higher than those of control model, according to the root morphology of the single root models.
    3. In the curved models of single root, stresses induced in the root tip area were lower under the loading from the outer side of root curvaturer than from the inner side.
    4. In the double roots model, stresses generated in the root tip area of the divergence model were higher than those of convergence model.
    From the above results mechanical effects of tooth root morphology on the tooth root and alveolar bone were clarified. These results also support the clinical procedures of tooth extraction based on clinical experience.
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  • Hiromichi AKIZUKI, Hiroshi YOSHIDA, Kimie MORI, Ryuta KATAOKA, Takashi ...
    1991 Volume 37 Issue 1 Pages 24-29
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Tongue movement of articuration was analysed with ultrasonography on 11 glossectmees (4 underwent direct suture, 2 received split-skin grafts and 5 received reconstruction with free forearm flap).
    This study used a transducer placed submentally, with the beam aimed cephalad toward the tongue. The motion of tongue was clearly described with this application. The amount and symmetricalness of tongue movement were evaluated in the ultrasonogram and compared with speech intelligibility.
    As a result, tongue movement of the glossectomy patient was smaller in amount and poorer in symmetricalness than normal. Speech intelligibility is related to the amount and symmetricalness in most of the patients. Especially symmetricalness influenced speech intelligibility in the rear portion of the tongue.
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  • Susumu HORIMOTO
    1991 Volume 37 Issue 1 Pages 30-49
    Published: January 20, 1991
    Released on J-STAGE: September 13, 2011
    JOURNAL FREE ACCESS
    Bone invasion of the DMBA-induced gingival carcinoma in hamster was studied with electron microscope.
    In the early phase of bone invasion, light microscopic observation showed the presence of muscle and/or connective tissue between the tumor and the bone on which the proliferation of osteoclasts often occurred. Electron microscopic observation revealed the development of active ruffled border of these osteoclasts. However, in the later phase, the tumor invasion near the bone surface led to the disappearance of these osteoclasts.
    Direct contact of the tumor with bone was observed with the electron microscope in one case among 23 animals. Tumor cells attached to the bone with half desmosome and invaded osteocyte lacunae and bone canaliculi. But there was no development of cell organelles related to bone resorption in the cytoplasm of the tumor cells, and lamina limitans was clearly observed in the bone surface facing to the tumor. Thus, the ultrastructural evidence that the tumor cells themselves directly resorb bone matrix was not obtained, though the tumor cells attaching directly to the bone may have some functions in bone resorption.
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  • Growth promoting effect of human placental conditioned medium and analysis of its effective factor
    Satoshi MATSUWARI
    1991 Volume 37 Issue 1 Pages 50-57
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    In order to improve human tumor clonogenic assay (HTCA) that is in vitro chemosensitivity test for anticancer drugs, human placental conditioned medium (HPCM) was applied to HTCA using double soft agar system on human oral squamous cell carcinomas (SCC).
    Human oral SCC growth on cultured cell lines, surgical specimens and cancer xenografts in nude mice were significantly stimulated by HPCM, so that HPCM was identified as the useful growth factor for human oral SCC.
    Furthermore the author tried to analyze the growth promoting factors contained in HPCM. Human chorionic gonadotropin (hCG) and its α and β subunits that were included in HPCM promoted colony formations. In one of four human oral SCC cell lines, the transcription of hCGβ mRNA was identified by Northern blot analysis and hCGβ was stained by immunohistochemical method.
    These results suggest that hCG or hCG like substances in HPCM can promote in vitro growth of human oral SOC.
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  • Katsuaki MIYAKI, Ken-ichiro MURAKAMI, Natsuki SEGAMI, Tadahiko IIZUKA
    1991 Volume 37 Issue 1 Pages 58-64
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The healing and morphologic changes of the temporomandibular joint (TMJ) after partial diskectomy in rabbits were investigated histologically and histochemically.
    The results obtained were as follows:
    1. The most frequently observed morphologic changes in the TMJ were flattening of the articular eminence and mandibular condyle. The healing took place with reconstruction of the TMJ, resulting in functional remodeling.
    2. There was no regeneration of the articular disk. Calcification and bone formations were observed in the remaining disks in 24 weeks survival rabbits.
    3. Healing process of TMJ components after diskectomy was considered slower and less smooth as compared with those of complete diskectomy experiments.
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  • Shuichiro KOKUGA, Takamichi YANAGISAWA, Yuetsu ONOE, Jun NATORI, Kazun ...
    1991 Volume 37 Issue 1 Pages 65-69
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The most common location of thyroglossal duct cyst is in the neck midline. Here we report a case of thyroglossal duct cyst located in the submandibular region in a 48-yearold female.
    The patient complained of painless swelling of the submandibular region. During the course of the first medical examination, the swelling in the left submandibular region was circumscribed, elastic and firm, tip of thumb-sized and smooth. The clinical diagnosis was a branchial cleft cyst or ranula of the submandibular region. Under general anesthesia, the lesion was totaly excised.
    From operative and histological findings it was suspected to be a thyroglossal duct cyst. There was no evidence of recurrence in the patient 2 years after the operation.
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  • Toshirou KONDOH, Norihiko TAKADA, Nobuyuki TANAKA, Masaaki HORINAKA, S ...
    1991 Volume 37 Issue 1 Pages 70-77
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The procedure and post-operative results of interpositional grafting of autogenous auricular cartilage following arthroplasty in the TMJ are presented.
    In seven patients operated with autogenous ear cartilage grafting following arthroplasty, follow-up ranges were from four to ten months.
    From the post-operative results we concluded that all patients were improved post-operatively in clinical symptoms and jaw function.
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  • Tateharu KAWASAKI, Tomoko FURUKAWA, Kazunori IWABUTI, Tadashi KANEKO, ...
    1991 Volume 37 Issue 1 Pages 78-81
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Osteoarthrosis deformans of the temporomandibular joint (TMJ) is a painful disease characterized by localized osseous changes in the moving parts of the joint.
    In this article, a case of a 28-year-old man with osteoarthrosis treated by right-sided high condylectomy was described. His complaint was limitation of mouth opening, jaw noise and severe right-sided facial pain during talking or eating.
    Radiographic findings revealed bony spicule formation on the surface of time right condyle. Because of no response to the conservative treatment for two weeks, we performed the high condylectomy with preservation of the meniscus as described by Henny.
    The surgical specimen showed a sharp bony protuberance on the articular surface. Postoperatively, he had complete relief of symptoms and returned to normal jaw function. From this case, we appreciated that high condylectomy had definite place in the treatment of patients with demonstrable articular pathology, severe pain arising from the TMJ, and no response to usual conservative therapy.
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  • Hirohiko TAIRA, Hirofumi MURASE, Yoshiki TATEYAMA, Maki TANAKA, Tomoyo ...
    1991 Volume 37 Issue 1 Pages 82-86
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Cementifying fibroma is a rare benign tumor of the jaw. Recently we experienced a case of cementifying fibroma of the mandible.
    The patient, a 59-year-old woman, visited our hospital because of swelling in the right molar region of the mandible.
    The tumor was surgically removed under general anesthesia. Histopathologial diagnosis was cementifying fibroma.
    The patient has an unevenful clinical course for about five years after the operation, and no recurrence has been noted.
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  • Tsukasa Tsuji, Makoto NOGUCHI, Hiroyoshi HIRATSUKA, Takashi SEKIGUCHI, ...
    1991 Volume 37 Issue 1 Pages 87-91
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Schwannoma is a comparatively rare neurogenic tumor of the oral cavity, originating from Schwann's sheath cell.
    We encountered a case of Schwannoma of the tongue in a 13-year-old boy. The tumor was excised under general anesthesia and diagnosed histologically as Schwannoma (Antoni-type A).
    MRI was very useful in the preoperative diagnosis, providing much information concerning the extension of the tumor which could not be obtained by ordinary X-ray CT.
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  • Etsuhide YAMAMOTO, Shigehiro KUMAGAI, Shuichi KAWAJIRI, Yasuko KADO
    1991 Volume 37 Issue 1 Pages 92-96
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Amputation neuroma in the oral region is rarely seen after surgical procedure, especially tooth extraction, and trauma. This is defined pathologically as non-neoplasma showing nodular hyperplasia of nerve fibers.
    A case of this is presented in this report. A 49-year-old woman visited our clinic with a chief complaint of painful nodule formation. Onset of this pain was two years ago after frenotomy of right lower buccal frenulum.
    The nodule exising under normal mucosa was red-bean size at first consultation. Pressure on this area aggravated the pain. It was, therefore, suspected clinically as a kind of amputation neuroma. Surgery was performed under local anesthesia.
    The nodule combined with mental nerve and was excised easily. Microscopically, the nodule composed of foreign body reaction to suture thread at superficial portion and amputation neuroma in the deeper one. Severe pain disappeared postoperatively.
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  • Sonou KOBAYASHI, Genzaburo MASUDA, Ryoichi KAWABE, Yoshimi ISHIKAWA, M ...
    1991 Volume 37 Issue 1 Pages 97-105
    Published: January 20, 1991
    Released on J-STAGE: September 13, 2011
    JOURNAL FREE ACCESS
    Congenital lateral cervical cyst, also called branchial cyst, is a relatively rare cystic disease of the neck which presents many problems regarding origin, differential diagnosis, therapy, recurrence, etc.
    We report here on 7 congenital lateral cervical cysts which were treated surgically in our clinic from 1979 to 1988 and diagnosed as lateral cervical cysts both clinically and histopathologically.
    The patients were 4 males and 3 females aged 17 to 59 years. All had been previously treated in as many as 4 other clinics, and bad been treated by puncture or incision as many as 20 times. Three eases showed inflammation of the upper airway which seemed to be a premonitory symptom of swelling induced by secondary infection. All cases showed painless swelling. Some showed althralgia of the jaw, hoarseness, dyspnca, difficulty in swallowing, and fever from neck swelling that caused secondary infection. We performed total resection in all 7 cases. In 3 of the cases there was adhesion to the internal jugular vein. In 2 case the cyst was accidentally ruptured during the operation. All cysts were on the upper or middle neck as defined by Rickles et al., and were classified as Baily Type II. Histopathologically, all cysts contained lymphoid tissue, and in 5 cases there was the formation of lymph follicles. There was stratified squamous epithelium without keratinization in 5 cases, stratified squamous epithelium with keratinization in one, and mixed cuboidal and squamous epithelium in one.
    We discuss the significance of these observations and the problems associated with such patients.
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  • Yoshimitsu KAMEYAMA, Yoshihiro SAKAKI, Kenjirou HIDA, Nagayoshi YAMADA
    1991 Volume 37 Issue 1 Pages 106-112
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    A case of newborn congenital epulis was reported. A ten-day-old female infant had a smooth and oval mass with a pedicle, measuring 23×19×18mm in size, arising from the alveolar ridge of the median lower jaw.
    Patho-histological diagnosis was a granular cell tumor.
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  • Tomoaki MURATA, Minoru YAMAOKA, Katsuhiko FUJIMOTO, Masaya YAMAMOTO, Y ...
    1991 Volume 37 Issue 1 Pages 113-117
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The term Angina Bullosa Haemorrhagica (ABH) was first used by Badham (1967) to describe blood blisters on the oral mucosa which appeared to be unrelated to defined disorders such as bullous diseases or blood dyscrasias. He suggested that ABH occurred most often on the soft palate after eating toast or some other hard food or drinking hot drinks.
    Typically blood blisters occur singly and enlarge suddenly to two or three centimetres in diameter. They burst shortly afterwards and are found to have ragged erosions. After two or three days, epithelialisation begins from the margins or from numerous small islands within the larger erosions which healed without scarring.
    This paper presents case reports of four patients with ABH.
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  • Relation to internal derangement
    Hiroyuki KAI, Sadako KAI, Tomofusa MIYAJIMA, Hideo TASHIRO, Osamu TABA ...
    1991 Volume 37 Issue 1 Pages 118-126
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Thirty one TMJs with osteoarthrosis of 28 patients (3 males, 25 females) were investigated in relation to internal derangement. Oblique transcranial projection, multiple tomography and direct sagittal CT were used in order to detect condyle changes. Bilateral arthrotomographic examination was performed in those patients. The results were as follows:
    1. The mean age of patients was 45 years and the maximal intcrincisal distance ranged from 22mm to 47mm with an average of 36.6mm. Crepitus was palpated in 22 joints.
    2. The most frequent finding of the condyle was erosive bone change followed by flattening, and then both marginal proliferation and sclerosis of the condyle.
    3. Arthrographic examination revealed that discs displaced frontward without reduction accounted for 78% of the TMJs, and those with reduction was 11%. But discs were not displaced in the remaining 11% of the TMJ with bony changes.
    4. Structural changes of the disc, like perforation, thickening, and adhesion were observed in 18 joints (65%) accompanied by discs displaced frontward without reduction.
    5. 12 patients were able to be followed up over 12 months in the course of conservative treatment with occlusal splints. In 5 patients whose discs had been displaced frontward without reduction, erosive bone changes or sclerosis of the condyle changed into flattening. The joint of one patient changed its condyle shape from erosive bone change into normal shape and its disc was not displaced but was perforated.
    From these results, it seemed that the overloading of the joint alone ae well as the displacement of the disc are the pathogenesis of osteoarthrosis. The hard tissue of the joint thought to he influenced and altered by the environment of the intra-and extra-joint. It is considered that the longitudinal observation of hard tissue is necessary in the patients with osteoarthrosis.
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  • Tetsuya YAMAMOTO, Kazunori YONEDA, Jyusui HIROTA, Eisaku UETA, Tokio O ...
    1991 Volume 37 Issue 1 Pages 127-137
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Adverse effects of cisplatin (CDDP) on kidney bone marrow and alimentary tract including oral mucous membrane were examined in 37 head and neck cancer patients (CDDP group) comparing with 52 patients without CDDP (control group). Twenty-five in CDDP group and 35 in controls received synchronous multidisciplinary therapy composed of peplomycin (30-90mg), 5-FU (1, 250-5, 400mg), 60Co radiation (24-40 Gy) and operation. The remainder in the groups were treated with only peplomycin. Doses of the drugs and radiation were not different between CDDP and control group. On 13 cases of CDDP group, cimetidine (CMT), a histamine H2 antagonist, was administrated at the 2nd and 3rd injection of CDDP with the aim of investigation of its kidney-protective ability. Laboratory results before, during and after treatments were comparatively studied. In patients receiving the trial of CMT, blood and urine samples were obtained before, day 1 and day 7 after CDDP injection.
    Myelosuppression in CDDP group was more remarkable than in controls. CDDP dosedependent, prolonged leukopenia and thrombocytopenia were observed, and decrease of both cells was exaggerated by 60Co. The values of BUN and Cr were almost constant in the control group, but in the other group they elevated immediately after the 1st administration of CDDP. Deterioration of BUN, creatinine clearance (Ccr) and N-acetyl-β-D-glucosaminidase (glucosaminidase) was CDDP dose-dependent. By CMT administration, no deterioration of kidney functions was found. The CMT effect was more visible in BUN and Ccr, but both urine glucosaminidase and β2-microglobulin were not clearly different between CDDP with and without CMT. Nausea and vomiting occurred in 29 (78.4%) and 21 (56.8%) out of the subjects, respectively, who took prophylactically anti-nausea and-vomiting drugs (methylpredonisolone and metoclopramide). CDDP did not directly affect the oral mucosa and did not strengthen mucositis induced by radiation or peplomycin. Besides the above results, it was found that each side effect of CDDP persists long term and may occur at long after the drug injection.It is also concluded that summed-up side effects become more severe when CDDP is combined with other anticancer drugs or radiation, and that CMT is useful for the protection of kidney against CDDP toxicity.
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  • Yoshiaki KAZAOKA, Youji TOMIDA, Akio YASUI
    1991 Volume 37 Issue 1 Pages 138-142
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    A case of oral and dermis Kaposi's sarcoma was reported. A 59-year-old woman had nodules on the mouth floor, the groin surface, and median surfaces of thigh and right chest. Histopathological examination of the nodules revealed proliferation of endothelium-like cell and fibroblast-like cells with extravasation of red cells and deposition of hemosiderin in the dermis. Resected tumor tissue of oral cavity was 45mm×25mm in size. Macroscopic appearance was coarse irregular surface with several ulcerations.
    Treatment with resection and immunotherapy (ok-432) in combination with chemotherapy (vinblastin, endoxan, predonine) was not effective for Kaposi's sarcoma. She died of intestinal bleeding due to thormbocytopenia and respiratory failure.
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  • Masahiro UMEDA, Akiteru OMORI, Satoshi YOKOO, Osamu TERANOBU, Koichi N ...
    1991 Volume 37 Issue 1 Pages 143-151
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    A clinicopathological study was made of 23 cases of oral squamous cell carcinoma with secondary metastasis to cervical lymph nodes, and the following findings were obtained.
    1. Secondary lymph nodes metastasis appeared in 36% of N0 cases.
    2. Clinical or histological factors (primary site, T-classification, age, treatment methods of primary tumor, degree of differentiation, mode of invasion, etc.) were not very available for the prediction of secondary metastasis.
    3. The sites of metastasis were level I or level II in most cases.
    4. The control rate of cervical tumor of secondary metastasis cases treated with radical neck dissection was 84%, which is almost equal to that of first metastasis cases.
    5. These findings suggest that elective neck dissection is not necessary for oral squamous cell carcinoma.
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  • Yoshinobu SIHBUYA, Hideyuki HOSHINA, Masataka KAJI, Yasushi OHASHI, Ma ...
    1991 Volume 37 Issue 1 Pages 152-155
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    A 35-year-old man was referred to our hospital with a radiolucency area in the anterior mandibular body on roentogenogram but had no subjective symptoms. Histopathologically there were mild pleomorphism, increased cellurarity and existence of a few mitosis in 100 high power field of biopsy specimen.
    Partial resection of the mandible was performed. Final histopathological diagnosis was schwannoma Antoni type A intermingled type B of central mandibular body.
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  • Satoshi YASUDA, Takahiko NISHIWAKI, Tadashi OKUTOMI, Hiroyasu SAKAI, N ...
    1991 Volume 37 Issue 1 Pages 156-160
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
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    A 76-year-old female was diagnosed eosinophilic granuloma, which occurred in themandibular bone. The following is a short report on the case.
    It is well known that eosinophilic granuloma frequently occurs in pediatrics, but rarely in geriatrics.
    She was diagnosed eosinophilic granuloma only in the mandible. But on X-ray findings, punched out bone defects were detected in the temporal bone, thoracic vertebrae, lumbar vertebrae, and the pelvis.
    So multiple eosinophilic granuloma was suggested.
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  • Report of two cases with a review of literature
    Yukiko OHYAMA, Yasuharu TAKENOSHITA, Hiroyuki ISHII, Masaie YAMAMOTO, ...
    1991 Volume 37 Issue 1 Pages 161-167
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
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    This report presents two cases of minor salivary gland sialolithiasis, which were found in 81 and 66-year-old males.
    In Japan, these are considered to be rare cases, in which only 27 (including ours) were reported. The sex distribution was 20: 7 for males with mean age of 56. 2 years (range 22-81). The upper lip was the most frequent site of involvement, followed by buccal mucosa. The histological figure of the 3 calculi of our cases were found to be homogeneous, partially lamellated, and lamellated patterns in the structure.
    Reviewing the English literatures revealed a huge number of reports, in which at least 50 cases had been reported in one hospital alone as an example.
    The clinical findings and the structure in the reported cases seemed similar in both Japan and the other countries.
    In the English literature minor salivary gland sialolithiasis is reported frequently, so it is not considered as a rare case any more. This might become the case of Japan, in which such cases would be seen frequently in the future.
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  • Hiroyuki ABE, Tsuneko OGINO, Yasushi MARUOKA, Tomohiro ANDO, Eiko FURU ...
    1991 Volume 37 Issue 1 Pages 168-174
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    This occurred in the right maxillary sinus of a 3-year-old girl. The child came to our clinic with the chief complaint of swelling of the right maxilla. Intraoral examination revealed a swelling of the buccal and palatal gingiva at the right EDC region. Radiographic film showed the abnormal features of diffuse cloudiness of the right maxillary sinus including displacement of a permanent canine tooth bud. The clinical diagnosis was odontogenic tumor. The tumor was resected under general anesthesia.
    The histopathological features of the specimens showed malignant lymphoma. We finally diagnosed T-cell acute lymphocytic leukemia with tumor formation. After the operation, antileukemic chemotherapy was undertaken in pediatrics. At follow up, 2 years 7 months postoperatively, she had no sign of recurrence.
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  • Immunohistochemical studies
    Tadakatsu KASAI, Shuji KURENUMA, Kimihiko SATO, Yoshiaki TAKAI, Ryoji ...
    1991 Volume 37 Issue 1 Pages 175-180
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Lymphoepithelial cyst generally develops in the lateral cervical area, but rarely in surface mucosa of the oral cavity. The lymphoepithelial cysts of the oral cavity are most commonly seen on the ventral surface of the tongue or the mouth floor.
    We recently encountered 2 cases of lymphoepithelial cyst in the mucosa, ventral surface of the tongue; in a aged 47-female and a aged 25-male.
    Histopathologic and immunohistochemical studies were done and lining epithelium of the cysts, salivary gland duct and oral epithelium were compared. Keratins monoclonal antibodies (MoAbs); PKK 1, KL 1, K 8.12, vimentin, and involucrin were used. The staining pattern of epithelial structure of the lesion was similar to that of the oral epithelium.
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  • Yoichi KURACHI, Masahito HIRAYAMA, Jyoji HAYASHI, Hajime TOBA, Masao N ...
    1991 Volume 37 Issue 1 Pages 181-186
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    According to the WHO classification, cementoma is classified into benign cementoblastoma, cementifying fibroma, periapical cemental dysplasia and gigantiform cementoma.
    We recently experienced a case of cementifying fibroma arising in the left mandibular region of a 36-year old female. This lesion was treated surgically, with resection of tumor from mandible under general anesthesia.
    From histological examination, the diagnosis of cementifying fibroma was made on the fact that the tumor was composed of spindle cell stroma containing collagen fibers with various-sized islands of hard cementumlike tissue.
    The prognosis of this case is favorable with no sign of recurrence.
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  • A case report and immunohistochemical studies
    Gouichi MATSUMOTO, Yoshihiro YUGAWA, Kazuaki SHINOZUKA, Chinatsu IBUKI ...
    1991 Volume 37 Issue 1 Pages 187-191
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
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    Cystic or tumorous lesions develop from the odontugenic tissues, including enamel organ, dental lamina and enamel epithelium, with embedded teeth. This paper reports on the case of a disease in third molar region of the right mandible of a 14-year-old boy.
    On the first examination it was diagnosed as a deritigerous cyst by X-ray finding, but postoperative histopatliology revealed three different epitheliums in the fibrous tissue. Immunohistochemically examination of this lesion, one of the epithelium showed positive staining with anti-keratin and vimentin antibodies. In this report, we mentioned the difficulty of clinical diagnosis and the importance of histopathological and immunohistochemical examinations.
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  • Junichiro NUKATA, Yoshihiro ARAKAWA, Masaaki IWAMOTO, Riki MATSUMOTO, ...
    1991 Volume 37 Issue 1 Pages 192-197
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    This study was designed in order to clarify the mode of response of dental pulps in teeth injured by trauma and time-course changes. The response of dental pulps to electrostimulation after trauma was studied by a follow-up examination of 14 patients with anterior teeth in and around mandibular fractures and subluxation of the mandibular anterior teeth involving 30 teeth. The following results were obtained.
    1. 46.7% of all teeth which responded negatively to electric stimulation at the time of injury showed positive sensibility after a varing time period: In the cases of subluxation of the teeth, electric dental pulp testing turned positive in 33.3%. On the other hand, in the cases of teeth in and around fracture lines, electric pulp testing turned positive in 52.4%.
    2. The electric pulp testing became positive most frequently 2 or 3 months after trauma. Subluxation of teeth was relatively earlier in recovery of the pulp response than teeth in and around fracture lines.
    3. In surgical treatment of mandibular fractures, electric pulp testing became positive in 87.5%. On the other hand, in conservative treatment of mandibular fractures, electric pulp testing became positive in 30.8%.
    4. The incidence of positive sensibility in electric pulp testing was 87.5% in Type I, 80% in Type II and 0% in Type III. The surgical treatment of mandibular fractures in Type II was relatively higher in incidence of recovery of pulp response than that in Type I.
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  • Part 1 System and clinical experience
    Kohsuke OHNO, Atsushi NAKAMURA, Kaori SAKAI, Masato KUDO, Yukihiro MIC ...
    1991 Volume 37 Issue 1 Pages 198-209
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    In orthognathic surgery (sagittal split ramus osteotomy of the mandible: SSO) there are problems such as postoperative arthrotic symptoms or relapse of the mandibular position. Prevention of such problems may require accurate repositioning of the external (proximal) fragments of the mandibular ramus. Consequently, some techniques for repositioning condyles and external fragments of the mandibular ramus have been reported.
    However, these techniques are not always successful in exact three-dimensional repositioning, so we devised a system consisting of repositioning and rigid fixation, and have been using these techniques in clinical applications. Our system has the following advantages:
    1. exact repositioning of external fragments of the mandibular ramus including condyles of the mandible.
    2. rigid fixation under repositioning.
    3. exact confirmation of repositioning is relatively easy.
    We thus concluded that our system is very valuable for SSO and modified techniques.
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  • Study on morphologic change befbre and after treatment
    Kayoko OHTSUKI, Masatoshi OHNISHI, Etsuo KUROKAWA, Tokuo WAKAO, Hideak ...
    1991 Volume 37 Issue 1 Pages 210-219
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Diagnosis of temporomandibular joint disease requires good understanding of the relevant pathological patterns. Exploring joint soft tissue structure is particularly important.
    Recently we observed intraarticular cavity forms before and after treatment, using double -contrast arthrographic CT and deuble -contrast arthrotomographic pictnres in various temporomandibular joint diseases. Morphological changes were studied.
    Disease and cases currently covered were internal derangement of the temporomandibular joint (fibrous ankylosis), patients who underwent arthroscopic surgery to treat recurring dislocation, cases of temporomandibular trauma, suppurative arthrosis, and others.
    Therapeutic approaches included disc reduction involving arthroscopic Nd-YAG laser surgery and suturing for cases of internal derangement (Type III) and temporomandibular trauma. Nd-YAG laser surgery comprised of evaporation and ablation was used ir cases of fibrous ankylosis; disc immobilization was used in recurrent dislocation cases. Arthroscopic intra-cavity cleaning and fibrous tissue removal was done in cases of suppurative arthrosis. Postoperative mouth-opening training and others were part of the functional rehabilitation program.
    Results showed in postoperative double-contrast arthrographic visualization that surgical cases benefited there was intracavity narrowing at the treated site. Cases of fibrous ankylosis and inflammatory and traumatic diseases showed cavity disappearance.
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  • Susumu OHMURA, Yoshimi ISHIKAWA, Shinjiro AOKI, Noriaki AOKI, Ken ITO, ...
    1991 Volume 37 Issue 1 Pages 220-233
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    In 40 cases that undergone salvage operation followed by immediate reconstruction with pectoralis major myocutaneous flap for head and neck cancer, we studied changes in the laboratory findings (serum albumin, transaminase, urea nitrogen, WBC, lymphocyte percentage, nutritional index) during 4 weeks after operation, together with correlation of patient's age with preoperative laboratory findings, and the correlation of the total blood loss during operation with postoperative laboratory findings. The following results were obtained.
    1. ALB, nutritional index, and PLT were significantly lowered as compared with preoperative levels, while WBC increased significantly. The margin of fluctuations was mostly similar to the findings in the cases previously reported in the fields of abdominal surgery and thoracic surgery, and surgical stress seemed larger than expected.
    2. Postoperative complications were often found in the cases not showing notable WBC increase right after operation, and in the cases showing low values of ALB, PLT for more than a week after operation.
    3. The greater the blood loss during operation, the less increase of WBC right after operation, and low level of PLT persisted. However, correlation with Hb was not observed.
    4. Blood transfusion during a week after operation did not significantly influence the changes of TP, ALB and Hb.
    5. From the age distribution of the present study, obvious correlation between age and laboratory findings was not observed.
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  • Takashi TAKEMOTO, Toshiyasu YAMASHITA, Ataka ITO, Yasuo KINOSHITA, Kaz ...
    1991 Volume 37 Issue 1 Pages 234-239
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    There are only a few reports on ameloblastoma that contains bone tissue in the central portion.
    We have experienced one case of a maxillary ameloblastoma in a 49 year old male.
    The patient bacame aware of painless swelling in the left canine region of the maxilla about 15 years ago. CT scanning showed a high density area in the tumor.
    Pathological examination revealed that the tumor was an acanthomatous type of ameloblastoma with bone tissue in the central portion.
    There was no tumor recurrence 4 years after surgery.
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  • Masaroh MATSUURA, Kanichi SETO, Toshiro KONDOH, Seiji TOJIMA, Hiroaki ...
    1991 Volume 37 Issue 1 Pages 240-246
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    A twenty-year-old woman was admitted to our hospital after being involved in a traffic accident. She sustained multiple mandibular fractures on the right condyle, the right coronoid process and the left canine region, and furthermore sustained a right maxillary Le Fort I type fracture and a right zygomatic bone fracture. Before her traffic accident, she had been recommended by her dentist to consult our hospilal about her class III malocclusion.
    A plan of surgical treatment was made using her upper and lower dental plaster casts completed before the injury by her dentist. The maxillary fracture was reduced manually before surgery. Open reduction was only performed on the fractures of the canine region of the mandible and the right zygomatic bone. The mandible was set-back by sagittal split osteotomy of the left mandibular ramus with the utilization of the right condyle fracture.
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  • Observation of recovery of abnormality of taste
    Nobutake KANEMATSU, Katsuya WATANABE, Noriyasu MURASE, Yoshiaki TAKAI
    1991 Volume 37 Issue 1 Pages 247-253
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    This paper described a case of Bell's palsy with developmental changes of 4 primary taste qualities: sweet, sour, bitter and salty.
    In the patient, a female aged 30 showed unilateral facial weakness and taste threshold value was increased, especially sour, salty and bitter.
    Following treatment with corticosteroid, facial weakness was much improved and abnormal findings almost disappeared. The taste threshold values gradually decreased with improvement of facial weakness. After about 30 days treatment, there was apparent full recovery of left side facial weakness and disappearance of taste abnormality. Methods of diagnosis and treatment for facial weakness were also discussed.
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  • Nobutake KANEMATSU, Takeshi YASUHARA, Hitoshi NAKAMINE, Katsuya WATANA ...
    1991 Volume 37 Issue 1 Pages 254-261
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    We report a case of oral multiple carcinoma in a 59-year-old female. The first squamous cell carcinoma had grown on the right side upper molar region. We treated this carcinoma with operation and radiation therapy.
    Fourteen months after discharge, the second squamous cell carcinoma grew on the right side of under molar gingival region and this carcinoma was also excised under general anesthesia. No recurrence was seen at seventeen months follow up study.
    In addition, we reviewed the Japanese literature of oral multiple primary carcinoma from 1979 to 1990. 25 cases were reported and the most common histological type of neoplasms (98.5%) were squamous cell carcinoma. The ratio of males to females was about 2.1: 1. Both first and second carcinoma were most frequently found in tongues. The causes of oral multiple carcinoma such as radiation injury of oral mucous membrane at the radiation therapy to the first oral cancer were discussed.
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  • Yoshiyuki MORI, Yuzo TAKAHASHI, Nagahisa FUJIMURA, Masazumi MIYAZAWA, ...
    1991 Volume 37 Issue 1 Pages 262-272
    Published: January 20, 1991
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Two cases of gingival hyperplasia induced by nifedipine and both nifedipine and cyclosporine were presented. In a 46 year old woman, gingival hyperplasia developed 1 year and 1 month after nifedipine administration. Gingival hyperplasia covered lower 1/3 of dental crown and was not seen in the edentulous portion. In a 47 year old man, gingival hyperplasia had not been observed during 4 years after nifedipine administration. It occurred 1 year and 4 months after administration of both nifedipine and cyclosporine due to renal transplantation. Additive effects of nifedipine and cyclosporine were considered in the latter case. Reported cases of gingival hyperplasia induced by nifedipine and/or cyclosporine were reviewed. First choice of treatment is change of drugs and plaque control and then gingivectomy should be chosen, if no improvement is found after a few months' observation.
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