日本口腔科学会雑誌
Online ISSN : 2185-0461
Print ISSN : 0029-0297
ISSN-L : 0029-0297
46 巻, 3 号
選択された号の論文の12件中1~12を表示しています
  • 上木 耕一郎, 中川 清昌, 松本 成雄, 山本 悦秀
    1997 年 46 巻 3 号 p. 205-215
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    Purpose: There are a variety of surgical methods to treat deformed jaws. However, mandibular protrusion and asymmetrical cases are dominant in Japan. No matter which surgical method isused, postoperative changes in temporomandibular joints (TMJs) are the most undesirable complications. Altered stress on the condyle and the surrounding tissue frequently cause morphological change of the TMJ. The purpose of the present study was to assess morphologic change of the craniomandibular joint (CMJ) in rabbit, especially simultaneous mandibular body rotation, following unilateral mandibular body shortening osteotomy.
    Materials and Methods: Adult male Japanese white rabbits (3kg, 12 to 16 weeks old) were used in this study. Experimental mandibular osteotomy was achieved in the right unilateral CMJ under general anesthesia. The surgery included vertical mandibular body osteotomy 5 mm in width after masseter muscle abrasion. Then the anterior and posterior osseous segments were fixed with wire at the two previously made holes. This postoperative condition was setback 5 mm for reduction of mandibular protrusion. Postoperative assessments were performed at 2, 4, 8, 12 and 24 weeks. The size of the mandible, glenoid fossa, and articular eminence were measured with a caliper.
    Results: The condylar mediolateral width in the right operative side was significantly smaller than that of the left non-operated control side after 8 postoperative weeks (p<0.05). However, the mediolateral width of eminence on the right showed no difference from that on the left. The morphological changes of condylar heads and dental arch were evaluated by an internal angle at the intersection of mesiodistal line and anteroposterior line. There were significant differences in these angles between the right and the left condylar heads after 4 postoperative weeks (p<0.05)
    Conclusion: The present experimental study disclosed morphological changes in CMJ caused by right unilateral mandibular osteotomy. Condylar remodelling was observed with the changed load on the CMJ after osteotomy. Postoperative morphological changes suggested that the performance of biological adaptation was achieved in rabbit CMJ.
  • 金子 昌幸, 福田 恵, 佐野 友昭, 大西 隆, 細川 洋一郎, 松井 聡子, 松本 仁人
    1997 年 46 巻 3 号 p. 216-222
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    The abilities of various concentrations (0 1000μM) of ascorbic acid to remove sup eroxide radicals were examined using the ESR spin trapping technique. Superoxide radicals were generated through the hypoxanthine-xanthine oxidase reaction system. Fifty pl of hypoxanthine, 35μl of DETAPAC, 50μl of ascorbic acid diluted to the desired concentrations, and 15μl of DMPO were placed in a test tube. Fifty μl of xanthine oxidase was added to the mixture and was mixed stirringly.ESR spectrometry was started just 1 minute after adding xanthine oxidase. The ESR spectrum obtained under the controlled condition using PBS showed the signals of DMPO -O1/2 and DMPO-OH. The signals obtained at each concentration of ascorbic acid were normalized as the relati ve signal intensities for the standard signal intensity of manganese oxide marker. These relative signal intensities were plotted and evaluated.
    The results showed that the relative signal intensities obtained at each concentration of ascorbic acid were decreased as the concentration of ascorbic acid was elevated from 0μM to 1000μM.
  • 扁平骨の垂直移動について
    大久保 肇, 上田 実
    1997 年 46 巻 3 号 p. 223-230
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    The purpose of this study was to investigate the possibility of perpendicular tabular bone distraction using osseointegrated implants in dog calvarial model. Nine adult mongrel dogs were used for this study. After insertion of three pure titanium implants in calvarial bone along the sagittal suture, connection of the distraction device and round shape osteotomy were performed. After allowing soft tissue to heal for 7 days, perpendicular distraction was started at the rate of 0.5 mm per day up to 7 mm. Experimental subjects were sacrificed at 2, 4 and 6 weeks after distraction. Radiographic and histologic examinations showed that perpendicular calvarial bone distraction was successfully achieved. The distraction gap was replaced by newly-formed bone. The implants remained stable without falling or mobility during distraction or the fixation period.
    The results of this study suggested that tabular bone deformity in the maxillofacial region can be treated perpendicularly by distraction osteogenesis using osseointegrated implants.
  • 角田 左武郎, 橘樹 秀春, 藤森 伸也, 宮崎 隆, 南雲 正男
    1997 年 46 巻 3 号 p. 231-236
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    It is well known that radiotherapy has profound influence on histocompatibility of titanium plate used for the reconstruction of the jaw in patients with oral cancer. In this study effects of radiation from 10 Gy to 50 Gy on proliferation and differentiation of osteoblast-like cells on the titanium plate were investigated.
    MC3T3-E1 cells were used as osteoblast-like cells. Proliferation was evaluated by crystal violet staining and cell differentiation was estimated by measuring ALP-ase activity. At first, the cells suspended in medium were radiated and placed on the titanium plate to study the potentiality of cell proliferation. The results showed that these cells could attach to the plate, though the number of cells was less than that of non-radiated cells. However, these radiated cells did not show further proliferation, and then these cells released from the plate with culture. Next, effects of radiation on cells proliferated on the plate were studied. The cells were radiated at the subconfluent stage. While further proliferation of cells ceased after radiation, the cells still attached to the plate during culturing periods. Expression of alkaline phosphatase (ALP-ase) was not seen. When the cells that were already expressed ALP-ase were radiated at the confluent stage, further increase of the enzyme activity was not shown such as nonradiated cell. However, the enzyme activity was not inhibited by radiation. Though the calcium accumlation on the titanium plate of radiated cells was less than that of non-radiated cells, calcification was confirmed in the radiated cells.
    These results suggested that radiation has profound influence on the proliferation and differentiation of osteoblast-like cells attached to the titanium plate.
  • 第一報: 顎変形症の手術前後における変化
    鷲見 幸男, 山本 浩貴, 澤木 佳弘, 上田 実
    1997 年 46 巻 3 号 p. 237-243
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    The purpose of this study was to evaluate the changes of facial form before and after operation by using a rapid noncontact three-dimensional measuring system in orthognathic surgery. This measuring system uses two laser slit beams to scan curved surfaces of subjects. The measuring time is about 4.3 seconds. The subjects were twelve patients with mandibular prognathism and five patients with facial asymmetry.
    The facial forms before and after operation (after 2 weeks, after 6 months) were compared;(1) changes of lower facial contours, (2) changes of esthetic line, (3) the line between lateral angles of eyes and the line between lateral angles of the mouth. The results showed usefulness for evaluation of facial forms in orthognathic surgery.
  • 吉川 文弘, 椿本 有利子, 森山 知是, 墨 哲郎, 菅原 利夫, 作田 正義
    1997 年 46 巻 3 号 p. 244-250
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    The clinical features of 678 patients with oral mucosal lesion who were referred to the Second Department of Oral and Maxillofacial Surgery, Osaka University Dental School Hospital between January 1985 and December 1994 were reviewed. The 678 patients were classified as bullous lesion in 3 cases, aphtous lesion in 106 cases, infection in 45 cases, stomatitis in 37 cases, pigmentary anomaly in 27 cases, autoimmune disease in 6 cases, lesion of lip in 18 cases, lesion of tongue in 116 cases, keratinized lesion in 318 cases, and other lesions in 2 cases.
    The keratinized lesions were found in 318 patients (45%) of the oral mucosal lesions in this report, and they were classified as lichen planus in 167 cases, leukoplakia in 150 cases, and leukoedema in 1 case.
  • 粕谷 幸生, 平松 善之, 藤内 祝, 上田 実, 松浦 由美子
    1997 年 46 巻 3 号 p. 251-255
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    As a consequence of radical operation of the maxillary sinus according to the Caldwell-Luc method, the bone defect remained in the anterior wall of the maxillary sinus. After the operation, the scar tissue invaded into the maxillary sinus from the bone defect. The invaded scar tissue caused some complications. To prevent the invasion of the scar tissue, in 11 patients, the bone defect was closed by free reimplantation of the anterior wall bone and the changes of the maxillary sinus were observed by computed tomography. Some years later, the reimplantated bone remained and the scar tissue had not invaded the maxillary sinus. The drainage duct into the lower nasal cavity remained, and the walls of the maxillary sinus had retracted. The reclosure of the bone defect in the anterior wall prevented the invasion of the scar tissue and enhanced favorable healing of the maxillary sinus.
  • 歯科的観点からの検討
    小野 徹, 柴崎 浩一
    1997 年 46 巻 3 号 p. 256-269
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    Helicobacter pylori (H. pylori) is found on the human gastric mucosa, especially associated with the lesions of chronic gastritis and peptic ulcer disease, as an uneven and patchy distribution. It is considered that the H. pylori transfer to the gastric organ through the mouth. However, there are few reports regarding this issue in dentistry. In this study, the prevalence rate of H. pylori was investigated by using bacteriological detection methods and by an immunochemical method of antibodies (IgG, IgA) in the serum and saliva. Thirty-nine patients who were undergone gastric endoscopic examination and biopsy were included in this study. H. pylori was isolated from gastric specimens of 28 patients (71.8%) in the quantitative culture. The polymerase chain reaction (PCR) method was positivei n 30 (76.9%) gastric specimens. The phenol red dye spraying method was positive in 17 of 25 (68.0%) and the rapid urease test was positive in 25 of 37 patients (67.6%).
    While the quantitative culture method could not distinguish H. pylori from dental plaque, but the PCR method was positive in 9 of 28 (32.1%) patients. The 13C-urea breath test was positive in 7 of 15 (46.7%) patients, the serological test (IgG) was positive in 22 of 25 (88.0%) patients. In the gingival mucosa of 13 normal subjects, H. pylori was negative by the quantitative culture method, however, the PCR method showed 5 (38.5%) subjects were positive. A survey was conducted on 785 healthy volunteers for identifying positive rate of H. pylori IgG antibodies in relation to age distribution. The elder age group (over 40 years old) had a high infection rate (over 80%), whereas, under 40 years old, the rate was low (40%). H. pylori antibodies of serum and salivary IgG and IgA were measured in 40 patients. Serum IgG was positive in 22 (55.0%) patients, and serum IgA was positive in 28 (70.0%) patients. Salivary IgG was negative, however, salivary IgA was positive in 27 (67.5%) patients.
  • 田原 孝之, 松田 耕策
    1997 年 46 巻 3 号 p. 270-274
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    Glandular odontogenic cyst (GOC) is a rare odontogenic developmental cyst that was classified by WHO in 1992. GOC was first proposed by Gardner et al. as a new pathological entity of odontogenic cyst in 1988.
    This paper reports a case of GOC arising in the right ramus region of the mandible. The patient was a 62-year-old male who visited Dental Clinic of Akita City Hospital in January 1992.
    Physical examination revealed asymptomatic slight swelling in the lower right third molar region. The gingival and alveolar mucosae were of nomal appearence. Radiological examination revealed well-defined unilocular radiolucent lesion involving the root of the horizontally impacted third molar in the right ramus region of the mandible.
    The presumptive diagnosis was odontogenic cyst. Enucleation of the cyst and extraction of the tooth were performed under local anesthesia. The surgical specimen was 40×15×10 mm in size. The cyst contained brown-colored fluid with cholesterol crystals.
    Microscopical examination showed that the cystic wall was covered with ciliated columnar epithelium, and non-keratinizing stratified squamous epithelium with plaque-like thickenings. In the epithlium, there were cyst-like spaces and glandular structures filled with PAS positive mucous material. Daughter cysts and epithelial islands were seen in connective tissue of the cyst.
    Pathological diagnosis was GOC. The healing process has been uneventful and there has been no evidence of recurrence for 4 years postoperatively.
  • 佐藤 直之, 堀本 進, 青木 伸二郎, 川辺 良一, 大村 進, 藤田 浄秀
    1997 年 46 巻 3 号 p. 275-279
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    Recently, the results of treatment in patients with chronic renal failure have improved owing to progress in the hemodialysis system. Accordingly, the number of dialysis patients has increased. Dialysis patients tend to have a high incidence of malignant tumor. As a result, the number of dialysis patients suffering from malignant tumor is expected to increase in the future.
    Surgical operations for tongue cancer in two dialysis patients were performed under local or general anesthesia. No serious complications arose during the three operations in the two patients.
    Surgical management of malignant tumor in dialysis patients requires careful attention. As a result of control in perioperative periods, it was considered that it could be performed in these patients safety under local or general anesthesia.
  • 外科療法症例の検討
    田中 信幸, 永井 格, 平塚 博義, 山口 晃, 仲盛 健治, 江戸 馨一, 野口 誠, 小浜 源郁, 三村 将文
    1997 年 46 巻 3 号 p. 280-288
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    Clinical examination was performed in 13 cases of malignant melanoma in the oral and maxillofacial region in Department of Oral Surgery, Sapporo Medical University School of Medicine from 1977 to 1995. Tumors were observed mostly in the maxilla and palate of the patients at the age of over 50 years old. After the recognition of the absence of metastasis, surgery could be performed, however, wide resection was not necessary. Once the biopsy was performed, the therapy could be performed as soon as possible in order to obtain a good prognosis. The clinical course of malignant melanoma in the oral and maxillofacial region was worse than that of squamous cell carcinoma, and in many cases, postoperative metastasis was found even though the primary lesion was controlled. These results suggested that the occurrence of the metastatic lesion should be carefully investigated in addition to postoperative examination for local recurrence
  • 渡邉 和代, 新美 敦, 藤内 祝, 藤本 雄大, 中井 英貴, 上田 実
    1997 年 46 巻 3 号 p. 289-292
    発行日: 1997/07/10
    公開日: 2011/09/07
    ジャーナル フリー
    This report describes three cases who underwent mandibular reconstruction by onlay bone graft and osseointegrated implants after tumor resection.
    The advantage of using osseointegrated implant with onlay bone graft after tumor resection is prevention of pathologic fracture and longer implant placement.
    Prominent resporption of grafted bone in one of three cases was observed.
    The reason for resorption was considered to be the long time from implant placement to loading, and poor quality of the grafted bone.
feedback
Top