Japanese Journal of Oral and Maxillofacial Surgery
Online ISSN : 2186-1579
Print ISSN : 0021-5163
ISSN-L : 0021-5163
Volume 38, Issue 4
Displaying 1-42 of 42 articles from this issue
  • Hiroyuki OKADA, Naoto KAMASAKI, Tetsuo OIKAWA, Hirotsugu Izumi, Yukish ...
    1992 Volume 38 Issue 4 Pages 525-535
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The vascularization is an important factor along with the wound healing process, and there are some reports on extraction wounds. However, the ultrastructure of newly developed capillaries in the healing process is still argued. It is aimed of clearing the ultrastructural early healing process of endothelial cells in the experimental tooth extraction wound by electron microscopy.
    Immediately after the extraction, the diffused basal lamina intermittently surrounded endothelial cells. Three days after the extraction, the basal lamina was not continuous, but had no gap with endothelial cells. Four days after the extraction, the basal lamina almost reconstructed.
    On tannic acid injection into blood vessels, it was observed in the narrow lumen of cell masses which continued to capillaries. It is suggested that cell masses are derived from the endothelial cells, and are the precursor of capillaries.
    The cell masses were formed by two or three undifferentiated endothelial cells. The narrow lumen was observed in the cell mass and these cells project short folds into the lumen. These cells connected by tight junctions, but the basal lamina was not complete. On tannic acid injection, it does not perfuse into the stroma through the basal lamina. It is concluded that these types of connections between the endothelial cells, were one of the characteristic features of capillaries in the tooth extraction wound.
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  • Change by aging
    Hajime TOBA
    1992 Volume 38 Issue 4 Pages 536-543
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Bone morphogenetic protein (BMP) and transforming growth factor-β(TGF-β) are present in bone tissue. These proteins are known to be associated with bore formations.However, the biological functions of these proteins are not yet fully clarified. In this study, the author examined bone induction and TGF-β activities using the pellets of the demineralized bone matrix and 4M guanidine hydrochloride extracts of bone matrix which were obtained from different aged rat tibia. Furthermore, the relationships between these activities and calcium content or morphology of materials are studied.
    The results showed that bone induction did not take place in the demineralized bone pellets of the fetus and neonatus, whereas it was found in those of 8-and 12-week-old rats. TGF-β activity was detected in all materials and its activity increased with bone maturation. Investigating the calcium contents and morphology of materials used in this experiment, the tibias obtained from 8-and 12-week-old rats consisted of mature lamellar bore and contained considerable amount of calcium, revealing well mineralization of these tissues.
    These results indicate that the activities of bone induction and TGF-β of the tibia was related to bone maturation.
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  • A scaming electron microscopic observation with vascular resin casting method
    Hiroshi HACHIYA
    1992 Volume 38 Issue 4 Pages 544-559
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    There exist considerable literatures on the vascular changes by tolerance dose or over tolerance dose irradiation, but little work has been done to study the effect of under tolerance dose irradiation on capillary changes. The purpose of this study was to observe capillary changes in the periosteum of rats after Co60 irradiation. The vascularity of the periosteum was observed with vascular resin casts and scanning electron microscope at 3 days to 30 weeks after the heads were exposed to 10 Gy or 20 Gy of Co60γray.
    The results were as follows:
    1. In rats irradiated with 10 Gy.
    Leakage of resin from the fine blood vessels was observed at 3 weeks. Decrease in the diameter of small blood vessels and decrease of capillary networks were observed at 5 weeks. These changes improved at 7 weeks.
    2. In rats irradiated with 20 Gy
    Leakage of resin and decrease in the diameter of the small blood vessels were observed at 2 weeks. The number of small blood vessels was decreased at 4 weeks. These changes improved at 7 weeks.
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  • Part 2 Titania (TiO2)-BMP complex
    Masato KOIE, Tatsushi KAWAI, Hiroyasu KATAOKA, Shinya KURITA, Masataka ...
    1992 Volume 38 Issue 4 Pages 560-566
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Bone morphogenetic protein (BMP) was combined with titania (TiO2) to develop a new biomaterial with osteogenetic properties. To evaluate titania as a base material of the titania-BMP complex, firstly the titania were implanted in the subcutaneous tissue of rats, and secondary osteoinductive activity of titania-BMP complex was examined in the heterotopie site.
    In the first experiment, titania particles (purity: 99.8%) were molded cylindrically, and sintered at 1, 450°C in an electric furnace. The cylindrical sintered titania were 2 mm in diameter and 6 mm in length. These titania were implanted in the dorsal subcutaneous tissue of wistar rats, and as controls titarium was implanted in the same manner. Five weeks after implantation, all the animals were sacrificed, then the tissue around the samples was excised. After fixation in 10% formalin, samples were removed, and the tissue was observed histomorphologically.
    In the second experiment, BMP was extracted from bovine bone by 6M Urea with 0.5 MCaCl2 using the procedure reported previously. In order tomake porous titania block, titania particles mixed with resin beads were molded spherically and sintered as described before. Five mg of BMP was hound on to porous titania by using 10μl of 10% gelatine solution. The complex was lyophilized and sterilized by EOG, then implanted in the thigh muscle pouch of ddy conventional mice which were sacrificed 4 weeks after implantation. As controls, BMP (5 mg)-gelatine pellets were implanted in the same way. In order to quantitate new bone formation, bone like deposit on soft X-ray films was analyzed by means of roentgenographic and computer image analysis. Furthermore undecalcified ground sections were examined by light microscopy.
    After 4 weeks of implantation, the titania were surrounded by thin fibrous tissue without inflammatory cells, as were the controls. All the titania-BMP complex induced new bone. On examining the subjects by computer image analysis, no significant differerce appeared between the implantation of titania-BMP complex and controls. In histomorphological observation, woven bone was seen around the titania and in the titania pores, where woven bonecontacted partially.
    These results suggest that titania has biocompatibility and does not suppress BMP activity. Moreover, titania-BMP complex could be clinically applied.
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  • I: The expression of matrix metalloproteinases in cultured oral squamous cell carcinoma and the effects of growth factors on their production
    Jingo KUSUKAWA, Yasuyuki SASAGURI, Tadamitsu KAMEYAMA, Minoru MORIMATS ...
    1992 Volume 38 Issue 4 Pages 567-575
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Mortality of cancer is the result of regional and/or systemic metastasis. Matrix metalloproteinases (MMPs) were believed to play an important role in its malignant behavior. MMPs have been identified as matrix-degrading enzymes, such as procollagenase (proMMP-1) of Mr=53, 000, progelatinase (proMMP-2) of Mr=72, 000 and proMMP-9 of Mr=92, 000, and prostromelysin (proMMP-3) of Mr=59, 000. The regulatory mechanism of these enzymes is still unclear; however, it has been indicated that many growth factors such as EGF, TGF-α, TGF-β, PDGF, and etc. will play an important role in MMPs synthesis of cancer cells.
    In this paper, we report that two oral cell lines of squamous cell carcinoma (SCC9 and SCC25) produce at least two types of MMPs, which have been identified as proMMP-2 and 3 by the indirect immunofluorescence technique, immunoblot analysis, and gelatin-substrate gel zymography. Additionally, a 92-kDa gelatinolytic metalloproteinase was detected in SCC25 by gelatin-substrate gel zymography. Furthermore, after the treatment with EGF, the production of proMMP-1 and 3 by SCC25 was increased in a dose-dependent manner, but not by SCC9. However, unlike EGF, TGF-β stimulated both cell lines to produce proMMP-2. These results suggest that oral carcinoma cells have a potential to degrade extracellular matrix macromolecules including basement membrane components, and EGF and TGF-β are important factors for influencing the metastatic potential of oral squamous cell carcinomas.
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  • II: A clinicopathologic study of the expression of matrix metalloproteinases 2 and 3 in oral squamous cell carcinoma and its relation to lymph node metastasis
    Jingo KUSUKAWA, Yasuyuki SASAGURI, Tadamitsu KAMEYAMA, Minoru MORIMATS ...
    1992 Volume 38 Issue 4 Pages 576-583
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    To investigate whether matrix metalloproteinases (MMPs) play an important role on the malignant potential of oral carcinoma, the expression of proMMP-2 and 3 in 47 patients with oral squamous cell carcinoma was analized by immunohistochemical staining of tissue specimens using monospecific antisera against human proMMP-2 and MMP-3. In 21 (77.8%) of 27 patients with lymph node involvement, the increased-production of pro-MMP-2 and 3 was observed, and proMMP-2 or 3 alone was observed in 4 patients (14.8%). On the other hand, the production of proMMP-2 and 3 in tissue was detected only in 4 (20%), and proMMP-2 or 3 alone in 7 (35%) of 20 patients, who had no lymph node metastasis. In the tissue specimens, proMMP-2 and 3 was expressed particularly in the diffuse invasive mode and in the part of advancing front of cancer. Since MMP-2 and 3 can degrade the extracellular matrix macromolecules including basement membrane components, these results indicate that analysis of proMMP-2 and 3 expression in tissue is useful for evaluation of the metastatic potential in oral squamous cell carcinoma.
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  • The Correlation between the pattern of Time/Activity curve and the amounat of saliva
    Kazufumi SUZUKI, Yoichiro HOSOKAWA, Masanori KANEKO, Keiichi OHMORI, K ...
    1992 Volume 38 Issue 4 Pages 584-589
    Published: April 20, 1992
    Released on J-STAGE: September 13, 2011
    JOURNAL FREE ACCESS
    Salivary gland scintigraphy with 99mTcO4- is a simple method to evaluate salivary gland function and has been available as a technique using a time/activity curve for a number of years. But, there were few reports on the relationship between the various patterns of the time/activity curvcs and the salivary flow rate from the gland. This presents correlation between the time/activity curve pattern and the salivary flow rate from the parotid gland.
    65 patients complaining of xerostomia were examined.62 were female and 3 male (average age 45.6 years, range 17-69years).Their diagnosis were 26 Sjögren Syndrome, 28 suspicion of Sjögren Syndrome and 11 parotiditis.
    The salivary flow rate from parotid gland was measured by stimulation with 10% citric acid using modified Carlson crittenden cup every 10 seconds for 5 min. 185 MBq 99mTcO4-was injected intravenously and sequential scintigraphy was perfbrmed. Time/activity curves were recorded on film. Six kinds of basic patterns werc followed; Normal pattern, Median pattern, Flat pattern and Sloped pattern (Mita et al 1981), Reaccumulation flat pattern and Poor secretion (Stimulant secretory ratio: less than 70%) pattern by us. The amount of saliva was as follows; Normal pattern (n=31): 5.4+0.4ml, Reaccumulation flat pattern (n=3): 4.2+0.6ml, Poor secretion pattern (n=18): 4.1+0.5ml, Median pattern (n=20): 3.5+0.5ml, Flat pattern (n=11): 2.6+0.5ml and Sloped pattern (n=1): 1.5ml. Normal pattern versus Poor secretion pattern, Median pattern and Flat pattern in the salivary flow rate were statistically significant as determined by Students, t-test.
    We assessed the correlation between the pattern of time/activity curve in the salivary gland scintigraphy and the amount of saliva.
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  • Tokio OSAKI, Noriko OKAZAKI, Kazunori YONEDA, Jusui HIROTA, Tetsuya YA ...
    1992 Volume 38 Issue 4 Pages 590-598
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    We tried a new measurement of QOL in oral carcinomas by evaluating patients' answers to a questionnaire regarding the disturbances which were induced by cancer treatments. The questionnaire was composed of such items as taste, salivation, mastication, swallowing, speech, pain, movements, palsy, deformity, performance status, information of the disease, mental disturbance and satisfactory treatment of the disease. In each impairment, scoring was made corresponding to the severity. As the results, the followings were obtained: first, the highest score was in mouth floor carcinomas, and gingival, tongue and buccal carcinomas followed in this order. Second, impairment scores were correlated with T stages, and unsuccessful cases showed high disability scores. Third, there was a clear correlation between the result of social (domestic) performance status by the usual 5-step evaluation and the impaired degrees determined by the score. Further, it was clarified that many patients had hoped to be more satisfactorily informed of the oral condition and the name of the disease. These results indicate that objective measuring of QOL can be made by expressing the impairment degrees with appropriate scores, and both the device of not destructive treatments and reasonable information of the disease condition are needed for obtaining satisfactory QOL in oral malignancies.
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  • Youji TOMIDA, Yuji NAKAMURA, Akio YASUI, Yoshiaki KAZAOKA, Katsutoshi ...
    1992 Volume 38 Issue 4 Pages 599-603
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Multiple idiopathic root resorption is a rare disease in which the roots of multiple teeth are resorbed within a short period of time without any particulr cause. A 55-year-old woman was referred to our clinic with a chief complaint of discomfort in the right maxillary region. The radiographic examination revealed apical root resorption of 6 right maxillary teeth (from the central incisor to the first molar). The patient had no history of trauma. Segmental resection of the right maxillary alveolar bone including 6 teeth was performed. Histologically the soft tissue area showed proliferation of the fibrous connective tissue. The diagnosis was multiple idiopathic root resorption. After the operation, the prognosis was favorable without any sign of recurrence.
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  • Ken OMURA, Sanzo TAKEMIYA, Shujiro MAKINO, Fumiyuki SHIMADA
    1992 Volume 38 Issue 4 Pages 604-614
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    A retrospective review of 6 patients with adenoid cystic carcinoma (ACC) of the submandibular gland treated between 1978 and 1991 was presented. Two patients who underwent aggressive surgery were disease-free, local control failed in 2 patients, and pulmonary metastasis developed in 2 patients without locoregional disease.
    This study supports the following conclusions:
    1. The perimeters of ACC are always more extensive than they appear to be clinically, because ACC has a strong tendency to invade the perineural space and extend for long distance.
    2. In preoperative diagnosis, aspiration cytology is essential for accurate diagnosis. Diagnostic imagings such as sialography, X-ray CT and MRI are helpful in detecting the size and extent of the tumor. RI study is indispensable in detecting the perineural spread
    3. Surgery is the treatment of choice, and it should be as extensive as possible, with a wide margin of healthy tissue. Radiation therapy, although not curative, plays an important role in prolonging survival and pain relief.
    4. ACC is characterized by slow growth, frequent recurrence, and systemic spread even after long-term survival without disease, therefore adjuvant chemotherapy should be taken into consideration.
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  • Oral carriage in general hospital dentistry
    Akihide NEGISHI, Tadao TACHIBANA, Shoko OBA, Teruo AMAGASA
    1992 Volume 38 Issue 4 Pages 615-620
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The isolation rates of methicillin-resistant staphylococcus aureus (MRSA) from clinical samples have increased in recent years. MRSA is toxic and few antibiotics are effective against the infection. Outbreaks of MRSA are nosocomial infections. The carriers of MRSA have more often been detected in inpatients than outpatients. Staphylococcus aureus exists in nasal and oral mucosa as normal bacterial flora. The patients with various basal diseases can be frequently detected having MRSA in the pharyngo-oral area.
    The purposes of this study were to investigate the state of MRSA detector in Tokyo Kosei-Nenkin Hospital from November 1989 to May 1990 and to screen the hospitalized patients who consulted our clinic from July to November 1990 for oral MRSA.
    MRSA was isolated from 66.7% of staphylococcus aureus specimens from inpatients and from 22.3% of the specimens from outpatients. Six cases were carriers of MRSA, as revealed by the results of swab examination of 100 hospitalized patients. Indeed, it is possible that MRSA infection spreads from these patients to other patients through dental and oral surgical therapy. From these results, we must take measures to prevent MRSA infection in dental and oral surgical treatment.
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  • Nobuyuki TANAKA, Kuo Jeng HSIEH, Takao MIYAMOTO, Kodo SASAKI, Yutaka K ...
    1992 Volume 38 Issue 4 Pages 621-627
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Rare varieties of malignant fibrous histiocytoma occurring in the maxilla are reported in this study.
    We observed 3 cases of malignant fibrous histiocytoma by light-and electron-mlcroscopy and examined the histiogenesis.
    Fibroblast-like cells, histiocyte-like cells, primitive mesenchymal cells, multinucleated giant cells and xanthomatous nucleated giant cells and xanthomatous histiocytes were recognized, and it was suggested that these tumors might be of primitive mesenchymal cell origin. When the clinical course is relatively good, myxoid type and giant cell type were shown and a number of fine granular materials were found in the stroma and rough endoplasmic reticulum.
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  • Satoshi KIMIZUKA, Kousaku MATSUDA, Tetsuo SAITO, Shiro MORI, Tai YAMAG ...
    1992 Volume 38 Issue 4 Pages 628-634
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Desmoplastic malignant melanoma (DMM) was a new clinicopathological entity as a variant of spindle cell malignant melanoma, which was first proposed by Conley et al in 1972. DMM shows features of a stony hard mass, proliferation of atypical spindle cells without distinct melanin pigments, and marked desmoplasia.
    The case was a 49 year old man. In 1986, the pigmented lesion of the upper gingiva and palate was diagnosed as lentigo malignant melanoma. He was treated by combination chemotherapy with DAV (DTIC, ACNU, VCR) and surgical excision.
    Pathological diagnosis of the lesion was malignant melanoma. In October 1987, metastasis arose in left cervical nodes and radical neck dissection was performed. However, In June 1990, a recurrence of the metastatic site occured. The tumor mass was 6.0×3.0×1.0 cm in size of a stony hard in consistency adhering to musculart issue. Excisional operative approach for the recurrent tumor was performed, but the tumor could not be excized because of adhesion to the left common carotid artery.
    Histopathological findings of the partially excisional tumor revealed marked proliferation of fibrous tissue containing a little atypical spindle shaped cells, without distinct melanin pigments. The tumor cells were slightly positive to Masson-Fontana staining.
    Immunohistopathologically, the tumor cells were positive to S-100 protein and neuron specific enolase staining.
    Histopathological diagnosis of the tumor was DMM.
    The patient has survived with the tumor without distant metastasis as of September 1991, but the tumor has grown little, under combination of chemotherapy and immunotherapy with intratumor injection of Interferon-β.
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  • Development of new instruments and a step cannulation technique
    Masakazu AKIBA, Fukumitsu YAMAGUCHI
    1992 Volume 38 Issue 4 Pages 635-641
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Instruments were newly developed for a step cannulation technique to achieve an arthroscopy of the inferior articular cavity of the temporomandibular joint. In order to introduce a rigid needle arthroscope of 1.5 mm in diameter with its cannula into the cavity, three different kinds of instruments were designed; a guiding stylet of 200 mm in length and 0.95 mm in diameter, a guiding cannula of 140 mm in length and 1.25 mm in diameter, and an adjusting cannula of 82 mm in length and 1.5 mm in diameter. We also used an 18 gauge needle and a needle of 14 gauge i. v. catheter. The main purpose of lengthening the newly-devised instruments was for the convenience of serial changes among a stylet, cannulac and needles. We utilized the following new technique. First, palpate and certify the lateral pole of the mandibular head, insert a 23 gauge needle into the inferior articular cavity and pump saline into the cavity. After distention of the cavity, insert an 18 gauge needle into the cavity, and into this needle insert the guiding stylet and remove the needle. Over the guiding stylet, insert the guiding cannula into the cavity and remove the stylet. Over the guiding cannula, insert the needle of 14 gauge i. v. catheter into the cavity so as to cut the capsular tissue, and remove the needle. Over the guiding cannula again, insert the arthroscopic cannula, equipped with the adjusting cannula, into the cavity, and leaving the scopic cannula alone, remove the adjusting cannula with the guiding cannula. This step in serial order brings certain insertion of the arthroscope into the inferior cavity. After the insertion of an 18 gauge needle, easy and steady insertion of the cannula of arthroscope into the inferior cavity is accomplished by this method, and surgical damage is slight. Contrary to an accepted opinion of using blunt trocar to avoid injuring the surrounding tissue, the sharpness of the edge of 18 gauge needle and needle of 14 gauge i. v. catheter makes it easy to cut the strong tissue of the capsule with weak and controllable power, and does not give unnecessary damage to the tissue of the joint.
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  • Tokio OSAKI, Jusui HIROTA, Kazunori YONEDA, Tetsuya YAMAMOTO, Eisaku U ...
    1992 Volume 38 Issue 4 Pages 642-648
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    We clinically analysed 58 patients who had died out of 168 cases of jaw and oral malignancies. When limited to tumor death, 21 patients of 138 squamous cell carcinomas (SCC), 4 of 22 salivary gland tumors (SGT), all of the 5 malignant lymphomas and 2 melanomas died of local invasion or metastasis. Except for tumor death, there were lethal cardiovascular diseases which composed of cerebral infarction in 9, cerebral bleeding in one and cardiac infarction in 4 cases, and also there were lethal respiratory disorder (pneumonia) in 4, secondary cancer in 6, unknown diseases in 2 and naturaldeath in 5 cases. The mean survival months were 25.2±19.4 in SCC and 40.2±26.5 in SGT. Inmost of those who died of cardiovascular diseases, complications such as heart disorders, hypertension, and diabetes mellitus were found before and during hospitalization. In SCC, the advanced tumors such as T3 and T4 with N2 or N3 sometimes insufficiently reacted tothe chemo/radiotherapy, and the mortality in those cases was extremely higher than thatin the earlier stage tumors. Local advancement, lymph node and distant metastasis caused deathin 9, 6 and 4 SCC cases, respectively. Compared with SCC, SGT showed a higher frequency of distant metastasis. These results indicate that advanced SCC resulting in insufficient tumor remission by induction therapy remains in a position to receive more effective approaches, and that distant dissemination of adenoid cystic carcinoma cells is of long term sequence. The present study also indicates that prevention of lethal secondary malignancies and cardiovascular diseases early detecting their associated risk factors by way of careful observation and routine laboratory examinations is important after discharge.
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  • Nobutaka KITAMURA, Tomohiro SHIGEMATSU, Chikara SAITO, Takeshi UCHIYAM ...
    1992 Volume 38 Issue 4 Pages 649-655
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Individual displaced teeth are generally treated orthodontically or prosthetically. But in cases of ankylosed teeth, the orthodontic approach, even when used with corticotomies, do not work at all. In cases of rotated teeth, it has a greater propensity for relapse. On the other hand, the prosthetic approach sacrifices the healthy tooth structure and may produce a somewhat compromised esthetic result. Single-tooth dento-osseous osteotomy is one of the orthognatic surgeries only for correction of individual tooth-bone segment alone. By attempting to use single-tooth dento-osseous osteotomies for ankylosed teeth and rotated teeth, we obtained satisfactory results. The advantages are: it is rapid and will move, a slight propensity for relapse and a good esthetic result. In order to successfully use this method, be especially careful to maintain the blood supply to the tooth-bone segment and when cutting Lbetween adjacent teeth so as not to injury to them.
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  • Mitsugi HIRAGA, Mutsumi KAMIHASHI, Toshio MASUDA
    1992 Volume 38 Issue 4 Pages 656-657
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
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  • Part 2 Repositioning of the external fragments using double splints method
    Takuya KAWAMURA, Shigeki KASAHARA, Chikashi SHINOHARA, Yoshinobu SHIBA ...
    1992 Volume 38 Issue 4 Pages 658-659
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Part 3 Observation of postoperative mandibular position
    Atsushi NAKAMURA, Kohsuke OHNO, Masato KUDO, Kaori SAKAI, Ken-ichi MIC ...
    1992 Volume 38 Issue 4 Pages 660-666
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    We have already reported an exact three-dimensional repositioning technique for the external ramus fragment in sagittal split ramus osteotomy using screw fixation. Eight prognathism patients underwent the operation with this repositioning technique, and changes in the external ramus fragment were studied using lateral, frontal, and axial radiograms taken befc, re and six weeks, six months and one year after the operation.
    When the status was compared before and six weeks after the operation, it was found that the external fragment had repositioned exactly in the antero-posterior direction, but that the gonion had shifted 1.3±4.3 mm laterally and the condyle had rotated 1.0±3.1° laterally. In one year of postoperative follow-up, the external fragment rotated slightly to the posterior direction while returning to the medial direction, but the condyle shifted laterally.
    These results revealed that our repositioning technique is effective for repositioning of the external ramus fragment in sagittal split ramus osteotomy and is particularly accurate in the antero-posterior direction.
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  • Hiroaki YOSHIDA, Yukio TSUKAMOTO, Mutsuhiro FURUTA
    1992 Volume 38 Issue 4 Pages 667-668
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Katsuya SAKAMOTO, Makoto Usui
    1992 Volume 38 Issue 4 Pages 669-670
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Keishi TSURUTA, Shunichiro NAGAHATA, Hiraki SADAMORI, Ryoichi KOBAYASH ...
    1992 Volume 38 Issue 4 Pages 671-672
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Kou KAWAHARA, SUSUMU IIDA, Nobumi OGI, Yuji KAMIYA, Tsuyoshi KAWAI, Yo ...
    1992 Volume 38 Issue 4 Pages 673-674
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Report of two cases
    Kaoru HARADA, Shin-ichi INOUE, Masayuki KUHARA, Takamori KODAMA, Tetsu ...
    1992 Volume 38 Issue 4 Pages 675-676
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Michiko SHIMIZUBATA, Makoto YOSHIYA, Tsunahiro NAKAMURA, Masato MANABE ...
    1992 Volume 38 Issue 4 Pages 677-678
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Report of a case
    Eiji HAYASHI, Akio HORI, Youji MIYAMOTO, Masaru NAGAYAMA, Hiroyo DEGUC ...
    1992 Volume 38 Issue 4 Pages 679-680
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Akihiro KANEKAWA, Shunsuke UEMURA
    1992 Volume 38 Issue 4 Pages 681-682
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • A refined technique of intraoral removal of sialolith at the junction of the duct and the gland
    Masakazu AKIBA, Fukumitsu YAMAGUCHI, Kazumi AKIBA, Hidefumi AOKI, Hiro ...
    1992 Volume 38 Issue 4 Pages 683-684
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Kenji KURASHINA, Hiroshi KURITA, Akira OGISO, Toshikazu MINEMURA, Akir ...
    1992 Volume 38 Issue 4 Pages 685-686
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Report of a case
    Hiroshi MUNAKATA, Kazuhiko OHSHIMA, Yutaka KOHYAMA, Tomoji SAKAMOTO, K ...
    1992 Volume 38 Issue 4 Pages 687-688
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Minoru MATSUYAMA, Kenji NAKATA, Yoshihiro SAWAKI, Minoru UEDA, Toshio ...
    1992 Volume 38 Issue 4 Pages 689-690
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Teruhiro KAYANO, Masahiro IWATA, Masayuki MORIKAWA, Youichi IKEDA, Shi ...
    1992 Volume 38 Issue 4 Pages 691-692
    Published: April 20, 1992
    Released on J-STAGE: July 25, 2011
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  • Compared with pre and postoperative oral function and denture retention
    Yutaka YAMAZAKI, Kanchu TEI, Ken-ichi NOTANI, Hiroshi FUKUDA
    1992 Volume 38 Issue 4 Pages 693-694
    Published: April 20, 1992
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  • Tosaku KUSHIDA, Makoto YOSHIYA, Atsushi SATO, Masayasu IWASE, Shigeyo ...
    1992 Volume 38 Issue 4 Pages 695-696
    Published: April 20, 1992
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  • Jun KURAUCHI, Masaaki Tsuji, Akira ISHIHARA, Isao KOSUGI
    1992 Volume 38 Issue 4 Pages 697-698
    Published: April 20, 1992
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  • Hideyuki HASEGAWA, Yoshiko MATSUZAKI
    1992 Volume 38 Issue 4 Pages 699-700
    Published: April 20, 1992
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  • Hiromitsu KISHIMOTO, Takamichi YANAGISAWA, Kazunari SAKURAI, Maya SHIM ...
    1992 Volume 38 Issue 4 Pages 701-702
    Published: April 20, 1992
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  • Chizuru ITO, Hiroaki TANIOKA, Masayo TAKAHASHI, Yutaka HASHIMOTO
    1992 Volume 38 Issue 4 Pages 703-704
    Published: April 20, 1992
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  • Osamu MARUTA, Susumu OHMURA, Sonou KOBAYASHI, Ryoichi KAWABE, Moritaka ...
    1992 Volume 38 Issue 4 Pages 705-706
    Published: April 20, 1992
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  • Koh-ichi KUBO, Yuh-ichi YOSHIDA, Taiichi NISHIMURA, Shin-ichi KITA
    1992 Volume 38 Issue 4 Pages 707-708
    Published: April 20, 1992
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  • Junichiro NUKATA, Masahiro MICHIZAWA, Riki MATSUMOTO, Yoshiyuki JOTOKU ...
    1992 Volume 38 Issue 4 Pages 709-710
    Published: April 20, 1992
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  • Hirotoshi NAKAGAWA, Takeshi KATSUKI, Masaaki GOTO, Eiro KUBOTA, Hiroyu ...
    1992 Volume 38 Issue 4 Pages 711-712
    Published: April 20, 1992
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