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Volume 47, Issue 2
Displaying 1-16 of 16 articles from this issue
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Harunobu SHIMA, Kohsuke OHNO, Mitsuhiro MATSUURA, Yoshiro MATSUI, Ken- ...1998 Volume 47 Issue 2 Pages 155-164
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSThe purpose of the present study was to clarify the anatomical basis of the cranio-and maxillofacial rehabilitation using implants. In the present study, 30 cadavers from the dissection room were evaluated. In particular measurements of the craniofacial bones, including height, width, and thickness of the cortical bone were performed. The results were as follows:
1. Orbital area
In the lateral and superior orbital rim of the placement site of implant of orbital prosthesis, the maximal thickness of the inner and outer sides was 16.0 mm, and the minimum was 9. 2 mm. The maximal thickness of the width was 11.1 mm and the minimum was 6. 8 mm. The maximal thickness of the cortical bone was 2.5 mm, and the minimum was 2.1 mm.
2. Temporal bone
1) At the placement site of the implant of an auricular prosthesis, the maximum thickness of the width was 10.4 mm, and the minimum was 2. 8 mm. The maximum thickness of the cortical bone was 3.7 mm, and the minimum was 3.7 mm.
2) At the placement site of the bone anchored hearing aid, the thickness of the inner and outer sides was 8.6 mm. Thickness of the cortical bone was 3.0 mm.
3. Frontal and nasal bone
In the center of the frontal and nasal bone, the thickness of the inner and outer sides was 19.3 mm. The thickness of the coronal bone was 3.0 mm.
4. Maxilla
The thickness of the inner and outer sites at the site 1 of the maxilla (5 mm distal to the center) was 13 mm. The thickness of the width at site 1 was 10. 1 mm. Tne thickness of the cortical bone at site 1 was 1.4 mm.
From these results, the anatomical basis on the cranio-and maxillofacial rehabilitation using implants could be clarified.View full abstractDownload PDF (1118K) -
Correlation between Features of Primary Lesion, Cervical Lymphnode Metastases, and PrognosisTadaaki KIRITA, Noriaki KAMIKAIDO, Hisashi SHIMOOKA, Yasutsugu YAMANAK ...1998 Volume 47 Issue 2 Pages 165-174
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSClinicopathological study on squamous cell carcinomas of the upper alveolus and gingiva (17 patients) and hard palate (9 patients) was performed to evaluate the relationship between the features of the primary lesion, cervical lymph node metastases and prognosis.
The results were as follows:
1. The locally controlled and regionally controlled rates were 84.6% and 92.3% respectively in 23 patients who underwent the operation.
2. The palatal type of carcinoma of the upper alveolus and gingiva, carcinoma of the hard palate, and the posterior type carcinomas tended to have high local recurrence rates and uncontrolled rates. These clinical types also had various aspects of cervical lymph node metastases.
3. According to the histopathological malignancy grade, the high malignancy group patients had high local recurrence rates and various aspects of cervical lymph node metastases.
4. The aspects of the cervical lymph node metastases depended on the patterns of the lymphatic pathways of the primary tumor locations.
5. The five-year cumulative survival rates of all patients were 71.1 % and 79.6 % in carcinoma of the upper alveolus and gingiva respectively and 55.6% in carcinoma of the hard palate.
6. The unfavorable prognostic factors were the palatal type of carcinoma of the upper alveolus and gingiva, carcinoma of the hard palate, posterior type, advanced stage, and a high histopathologic grade of malignancy.View full abstractDownload PDF (1046K) -
Kazutaka SUYAMA, Shigeru YAMABE, Michio TOKUHISA, Goro KAWASAKI, Takem ...1998 Volume 47 Issue 2 Pages 175-180
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSTen primary cases of malignant lymphoma in the oral and maxillofacial region, which were treated in our department between 1985 and 1997, were examined clinically and histopathologically. The results were as follows:
1) The patients consisted of 4 males and 6 females. Their mean age was 61.9 years.
2) The chief complaints were tumor formation in 5 cases, swelling in 4, and spontaneous pain in 1.
3) The presumed primary site of the tumor was the submandibular lymph nodes in 2 cases, the submental lymph nodes in 1, the upper gingiva in 3, the lower gingiva in 1, the hard palate in 1, the oral floor in 1, and the mandibular bone in 1.
4) The initial clinical diagnoses were malignant lymphoma in 4 cases, malignant tumor in 2, benign tumor in 3, and inflammation in 1.
5) Laboratory examination indicated a high LDH level in 5 cases and anti-HTLV-I antibody was positive in 4 cases.
6) Non-Hodgkin's malignant lymphoma was diagnosed in all cases. Histopathological classification was applied according to the LSG classification. In the cases of nodal lymphoma, the tumor cell type was diffuse large in 1 case, diffuse pleomorphic in 1, and follicular medium-sized in 1. In the cases of extranodal lymphoma, the tumor cell type was diffuse large in 2 cases, diffuse mixed in 2, diffuse pleomorphic in 2, diffuse lymphoblastic in 1, and follicular mixed in 1. Immunophenotypic analysis of surface markers revealed that 2 of 3 cases of nodal lymphoma were T-cell type, and 3 of 7 cases of extranodal lymphoma were T-cell type.
7) According to the Ann Arbor staging classification, 4 cases were in stage I, and 6 cases were in stage IV.
8) For treatment, radiotherapy alone was performed in 1 case, both radiotherapy and chemotherapy were performed in 1, and chemotherapy alone was performed in 8 cases.
9) Five patients were alive and 5 patients had died as of May 1997. The overall 5-year survival rate was 29.2 %.View full abstractDownload PDF (794K) -
Juli PAN, Tatsuo SHIROTA, Yuki TOKUGAWA, Masataka YAMAZAKI, Masayuki M ...1998 Volume 47 Issue 2 Pages 181-188
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSThis study was conducted to investigate the effect of osteopenic bonetissue around the implants in ovariectomized rats. Thirty-two-week-old female Wistar rats were used in this study. Cylindrical hydroxyapatite-coated implants were placed in the proximal part of the tibiae, and the rats underwent bilateral ovariectomy or sham surgery. The animals were sacrificed 28, 84, and 168 days after surgery. Undecalcified sections were prepared and examined by routine microscopy and microradiography. Histomorphometric measurement were obtained with a computer-based image analyzer to quantify the percentage of implant-bone contact and trabecular bone around the implants. Ovariectomy significantly reduced the density of trabecular bone around the implant. In the cortical bone area, ovariectomy did not affect bone contact with the implant. However, the rate of implant-bone contact in the medullary cavity of the test group tended to decrease and was significantly lower than that in the control group more than 84 days after implantation. These results suggested that when placing dental implant in menopausal patients, the progress of the implant must be carefully observed during reduction of bone density.View full abstractDownload PDF (8548K) -
Significance of Active Oxygen Production Ability of Peripheral Blood Neutrophil and Serum Immunosup Pressive Acidic ProteinKeiichi IGARASHI1998 Volume 47 Issue 2 Pages 189-198
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSIt has been pointed out that the host-defense abilities of patients with chronic osteomyelitis of the mandible could be impaired and that the function of peripheral blood neutrophils (PMN) was responsible for the suppression of the host-defense mechanism in various diseases. In this study, the superoxide (O2-) production was investigated by peripheral blood PMN of twelve patients with chronic osteomyelitis or radioosteomyelitis of the mandible using the CLA-dependent chemiluminescence (CL) method and measured the concentration of serum immunosuppressive acidic protein (TAP) by the single radial immunodiffusion method. Furthermore, influences of human IAP on the 02- production by PMN were also examined in vitro. The results were as follows:
In the preoperative stage, the 02- production by PMN of patients, which was indicated by maximum CL intensity, showed lower values than those of healthy volunteers. In the postoperative stage, however, 02-production ability recovered to the level of healthy subjects. The serum IAP concentration of preoperative patients showed remarkably higher values than those of postoperative patients. Addition of human IAP to zymozan-stimulated PMN mixture dose-dependently enhanced 02- production.
These findings suggested that the suppression of 02.- production by PMN in osteomyelitis patients was an important factor for the impairment of host-defense mechanism, which caused prolonged infection in this disease. To examine the neutrophil function and serum IAP level of patient's peripheral blood was strongly recommended in the treatment of chronic osteomyelitis with poor healing.View full abstractDownload PDF (1309K) -
Kazuhiro ONO, Ritsuo TAKAGI, Tatsuaki KOBAYASHI, Kayoko NOZAWA, Yasush ...1998 Volume 47 Issue 2 Pages 199-205
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSAbstract: The position sense of the mandible is very acute, and sensory information from peripheral nerve terminals is considered to contribute to this oral sensation. The roles of temporomandibular joint and masticatory muscle proprioceptors were evaluated by the psychophysical technique. The subjects were five healthy volunteers with no abnormalities of the temporomandibular joints, masticatory muscles, or occlusion. After a mandibular position defined as the interincisor distance was presented and learned by the subjects, they were asked to reproduce a subjectively equivalent mandibular position, and the differences in the interincisor distance between the presented and reproduced mandibular positions were evaluated.
1. Changes in the subjectively equivalent mandibular position were studied with and without blocking of articular sensory information by anesthetizing the bilateral temporomandibular joints, but no significant difference was observed between with and without anesthesia.
2. When sensory information from muscle spindles was increased by vibrating the bilateral masseter and temporal muscles, errors were observed in the subjectively equivalent mandibular position: the reproduced interincisor distance was significantly reduced.
These findings suggested that sensory signals from the temporomandibular joints do not contribute to the position sense of the mandible and that awareness of jaw position depends on sensory input from muscle spindles of the masticatory muscles.View full abstractDownload PDF (879K) -
Demonstration of Bilirubin in Dental Hard TissueKazufumi WATANABE, Toshiyuki SHIBATA, Kazuyuki OHMORI, Fumiyo MAKI, Ic ...1998 Volume 47 Issue 2 Pages 206-213
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSAbstract: This study was conducted to demonstrate the presence of bilirubin in deciduous teeth obtained from three patients with severe liver dysfunction. The diagnosis was bilirubin pigmentation of the teeth. A part of each tooth was used for histological analysis and the remaining part of the tooth was used for qualitative analysis after bilirubin extraction with a mixed solution of chloroform, methanol, and acetic acid, 30: 10: 0.5, v/v. Histological analysis of the pigmented teeth showed the presence of a green stripe in the dentine running parallel to the incremental line in two cases that had hyperbilirubinemia for a short time. On the other hand, in a case of hyperbilirubinemia for a long time, this characteristic stripe was not observed. The bilirubin extracted solution was evaporated, and the residue was redissolved in chloroform. Then its absorption spectrum was measured before and after diazo reaction. This resulted in a shift of the absorption maximum from 450 to 540 nm and indicated the enhancement of the spectrum as compared with that of normal deciduous teeth. These results indicated the presence of bilirubin in the teeth that were clinically diagnosed as bilirubin pigmented teeth.View full abstractDownload PDF (6244K) -
Tomoari KURIYAMA, Kiyomasa NAKAGAWA, Yasumasa SAIKI, Etsuhide YAMAMOTO1998 Volume 47 Issue 2 Pages 214-218
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSAbstract: Experimental intraabdominal abscess in mouse was investigated to assess an antibiotic for odontogenic infection.
Clindamycin was used in this study. The effect of clindamycin with intraabdominal abscess formation and viable cell count in abscess caused by Streptococcus constellatus and Fusobacterium nucleatum both alone and in combination. In all infection patterns, clindamycin was effective.
In conclusion the experimental intraabdominal abscess in mouse was useful to assess an antibiotic for odontogenic ifection.View full abstractDownload PDF (608K) -
Kazuhide SEKO, Hideaki KAGAMI, Katuhiro SENGA, Kenji OZEKI, Toshio SHI ...1998 Volume 47 Issue 2 Pages 219-223
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSAbstract: Oral discomfort is known as a common manifestation in postmenopausal women, and a close relationship is suggested between oral discomfort and the levels of sex steroids. In this study, ovariectomised rats were compared to sham-operated rats both histologically and immunohistochemically using anti-PCNA antibody to evaluate the effects of sex steroid on oral mucosa. The results were as follows:
1) In the ovariectomised rats, the thickness of oral mucosa were smaller than that in sham-operated rats, and significant differences were observed in the tip of the tongue.
2) From the results of immunostaining using anti-PCNA antibody, the turnover period was prolonged in ovariectomised rats at the tip of the tongue, which may affect the thickness of oral mucosa.
3) The levels of sex steroids are changed in the climacteric period, which could contribute to the histological change of oral mucosa, as well as the onset of oral discomfort inpostmenopausal women.View full abstractDownload PDF (7880K) -
Report of a CaseTakeshi YAMANAKA, Tadaaki KIRITA, Masanori ITAHASHI, Yoshiyuki NAKATAN ...1998 Volume 47 Issue 2 Pages 224-228
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSAbstract: Pycnodysostosis is a rare hereditary sclerosing bone disorder characterized by dwarfism, open cranial sutures and defects of the terminal phalanges.
A case of pycnodysostosis in a 21-year-old male complicated with chronic osteomyelitis of the maxilla was successfully treated by sequestrectomy extensive surgical debridement and closed continuous irrigation method with detergent-antibiotic solution. The treatment of osteomyelitis associated with this disease was also reported.View full abstractDownload PDF (8322K) -
Tomomi YAMASHITA, Kanchu TEI, Nobuya SATOH, Akira SATOH, Ken-ichi NOTA ...1998 Volume 47 Issue 2 Pages 229-232
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSA 60-year-old male was referred to Dental Hospital, Hokkaido University because of squamous cell carcinoma of anterior floor of the mouth (T2N1M0). His family and past medical history did not reveal anything in particular. He underwent preoperative irradiation of 40 Gy of 60Co to the primary site and bilateral upper neck regions. On February 23, 1995, tumor excision with marginal resection of mandible, left radical neck dissection, right supra-omohyoid neck dissection, oral reconstruction with rectus abdominal myocutaneous flap, and tracheostomy were performed under general anesthesia.
On the second postoperative day, chylous leakage of his left lower neck was suspected. Although a pressure dressing was applied for two days, it was not effective and leakage continued until the 4th day, when we ligated the lymphvessels and applied fibrin adhesive there to. On the 5th day, radiographic evidence of left pleural effusion was found, and drainage of the left pleural cavity was performed by an internist. The drained fluid was milky and had a high level of triglyceride. On the 7th day, the fluid was diminished and the drain was removed.
Chylothorax is an uncommon complication after radical neck dissection. Possible mechanisms of the pathogenesis and modern concepts of the treatment were discussed.View full abstractDownload PDF (3130K) -
Hidemichi YUASA, Eiichiro ARIJI, Shinya MAKINO1998 Volume 47 Issue 2 Pages 233-238
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSRandomized clinical trials are often used in clinical research to obtain correct evaluation of the efficacy of treatment. For such research, however, “informed consent” is required and it may decrease the rate of enrollment. In this paper, the patient's concern about informed consent and randomized clinical trials was analyzed by means of a selfadministered questionnaire. Three hundred fifty-five outpatients were asked to give their own opinions about the following two problems. The first is the consent to use the patient's data for research not for treatment. The second is the consent to enrollment in randomized clinical trials. The rate of consent to use the patient's data was 18 % in case of without informed consent, while it increased to 80 % with informed consent. Thirty percent of the patients refused to enroll in randomized clinical trials. These results indicated the existence of many problems to be solved in the design of clinical research.View full abstractDownload PDF (720K) -
Atsushi IIZUKA, Goichi TSUKAMOTO, Akira SASAKI, Yohei ETOH, Seiji SAWA ...1998 Volume 47 Issue 2 Pages 239-243
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSMandibular fractures in twenty-six edentulous patients (having a maximum of 7 teeth) treated at Oral and Maxillofacial Surgery II, Okayama University Dental Hospital from April 1982 to March 1995 were reviewed and analyzed. Patients with alveolar fractures were not included in the study. The mean age of the patients was 64.2 years old and the male to female ratio was 1: 1.36. 38.5% of the patients were injured in traffic accidents, and the same number of patients were injured by falling because of their advanced age. 41.7% had condylar fractures and 29.2% had molar region fractures. The percentage of molarregion fractures this time was higher than that of previous times, including fractures of dentulous patients. Twelve of the 26 cases underwent conservative procedure, and 14 cases underwent surgical procedure. In general, conservative procedure was performed for condylar fracture, and surgical procedure for other fractures of the edentulous mandible.View full abstractDownload PDF (4462K) -
Clinical and Histological Study on Six CasesToshiyuki KIHARA, Hiroshi HARADA, Jingo KUSUKAWA, Tadamitsu KAMEYAMA1998 Volume 47 Issue 2 Pages 244-249
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSSix cases of myxoma of the jaw were studied clinicopathologically. The subjects included four males and two females aged 16-59 years (mean 34.5 years). Tumors developed in the mandibule in all cases and were located between unilateral anteriors and molars in three cases, in the unilateral molar region in one case and between bilateral molars in two cases. Expansion of the mandibular bone was noted in each case. Radiographically, multilobular and unicystic appearances were observed in two and four cases respectively. No case revealed impacted teeth. Two cases each were treated by partial mandibular resection, regional resection, and enucleation with curettage. Follow-up was performed from nine months to two years and nine months for each case, and there has been no evidence of recurrence. Histologically, tumors revealed sharp spindle cells arranged in regular or random directions in the background of loose, mucoid-rich stroma. A case showed cystic structures, including mucoid materials, and another was rich in odontogenic epithelia.View full abstractDownload PDF (7779K) -
Motoyasu KATO, Toshiyuki SHIBATA, Yoshihiro ABIKO, Kazufumi WATANABE, ...1998 Volume 47 Issue 2 Pages 250-253
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSA case of benign lymphoepithelial lesion with amyloidosis in the left sublingual gland was reported. A 48-year-old female was referred to our hospital by her dentist, for examination of the mass on the left oral floor. Physical examination revealed an elastic hard movable mass, measuring 28×17 mm, without pain in the left sublingual gland. As a result of fine needle biopsy, a cytological diagnosis of class I was made. The excision of the mass, including the sublingual gland, was carried out under local anesthesia and intravenous sedation. The pathological examination indicated a benign Iymphoepithelial lesion with amyloidosis. One year after the operation, the prognosis of this lesion was favorable.View full abstractDownload PDF (6812K) -
Tetsushi YAMADA, Yasuo ISHII, Yoshimasa KITAGAWA, Toshiyuki OGASAWARA, ...1998 Volume 47 Issue 2 Pages 254-259
Published: April 10, 1998
Released on J-STAGE: September 07, 2011
JOURNAL FREE ACCESSThis paper describes successful treatment of a 74-year-old male with Obstructive Sleep Apnea Syndrome (OSAS) by using the splint appliance. He had been bothered by loud snoring at night for fifty years. Therefore, he took a monitoring examination while sleeping in a hospital at the Internal Medicine Department. According to the results, his Apnea Index was very high (40.1), the clinical diagnosis was OSAS, and he was brought to our department for treatment. He was cured by using the splint appliance, not by a surgical operation. As a result, the index was decreased to 1.5 and his snoring, his chief complaint, stopped, hence this conservative therapy was considered to be effective. Three years five months have passed since the treatment, and the prognosis is good.View full abstractDownload PDF (7911K)
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