Matsumoto Dental University Repository
Not a member yet
2206 research outputs found
Sort by
術後性上顎嚢胞5症例のX線診断学的検討
Get PDFapplication/pdfPostoperative maxillary cysts generally occur in the maxilla or cheek region in paranasal sinus connections that were performed several years previously. They often develop in the third or fourth decade in patients who underwent surgery 5 to more than 10 years before. To examine this condition in daily clinical practice, we conducted a radio-diagnostic study in 5 cases (males 3, females 2, aged 48 to 66 years with a mean of 59.4 years) selected from patients who visited our hospital between October 1, 1997 and August 31, 1998, underwent diagnostic imaging by CT and were diagnosed with clinically or radio-diagnostically suspected of having postoperative maxillary cysts. Diagnostic imaging is inevitable to estimate the site, size, number and other characteristics of the cyst presurgically. In some cases, however, differentiation from maxillary sinusitis was difficult, and a careful diagnosis was required.journal articl
蜂窩織炎4症例のX線診断学的検討
Get PDFapplication/pdfSuppurative inflammation in the loose connective tissue may quickly spread into an interstitial space, cause diffuse local swelling and induce phlegmon, when no isolation from the surrounding tissue is present. To examine this condition in daily clinical practice, we conducted a radio-diagnostic study in 4 cases (males, aged 24 to 83 years with a mean of 59.0 years) selected from patients who visited our hospital between October 1, 1997 and September 30, 1998, underwent diagnostic imaging by CT and others and were diagnosed with or clinically or radio-diagnostically suspected of having phlegmon. Inflammation spread into the parotid and/or masseteric region in some cases, but not into the pterygopalatine fossa or orbit. Although intensive antibiotic and antiphlogistic therapy may prevent widespread inflammation, techniques for urgent diagnosis and therapy of this disease are needed.journal articl
ヒト歯肉組織の肥満細胞免疫組織化学的研究
Get PDFapplication/pdfUsing anti-human mast cell tryptase antibodies, immunohistochemical examinations of mast cells were performed on 10 clinically healthy and 10 chronically inflamed human gingival specimens. The clinically healthy gingiva was found to be rich in mast cells. Immunostaining revealed about 200 mast cells per mm^2, and about 150 metachromatic cells per mm^2. A significant difference in mast cell numbers between both techniques was found within the pocket area. Many mast cells were also found in the chronically inflamed gingival specimens, however, the number of mast cells showed extensive individual variations. The results demonstrate that the immunostaining technique presently used is a specific and reliable method to examine of mast cells in human gingiva. Individual variations in mast cell density of chronically inflamed gingival specimens may be due to differences in degree, type and period of irritation, however, extended studies with larger samples are needed to provide additional information regarding on the role of the mast cells in gingival inflammation.journal articl
顎関節疾患のX線診断学的検討
Get PDFapplication/pdfTo obtain the diagnostic information concerning temporomandibular joint disease, we studied 92 patients visiting our hospital with regards to clinical symptoms and radiographic findings. Of the clinical symptoms, trismus was obserbed in 42.3% of cases, pain in 86.0%, and clickings in 81.7%. In the radiographic findings, limitations of temporomandibular joint movements were observed in 74.4% of cases, abnormal joint shapes in 48.9%, and displacement of joint positions in 61.6%. In conclusion, serious disorders were thought to be few due to the low frequency of trismus in these patients. However, periodical radiographic examinations are necessary for diagnostic accuracy and evaluation of treatment of these disorders.journal articl
北京龍頭診療所歯科における1年間の来院患者の実態調査
Get PDFapplication/pdfWhen the Department of Dentistry, Beijing Long-tou clinic opened for Japanese living in Beijing city, our university was requested to cooperate with this institution. Our Department of Endodontics and Operative Dentistry was in charge for the first year. The clinic was opened on October 14, 1996. For approximately 1 year we were able to observe the number of new monthly patients, the ratio between males and females, distribution of age, kind of occupations, chief complaints, and diseases based on charts or examination cards. The results obtained were as follows: 1) The average number of new patients was 43.7 per month. 2) Male/Female ratio Of a total of 524 patients 293 were males (55.9%) and 231 were females (44.1%). 3) Age distribution The age of the patients ranged from 25 months to 73 years of age. Patients in their thirties accounted for the largest group with 24.2%. 4) Occupations The largest number of patients were office workers (42.8%), followed by housewives (25.6%). 5) Chief complaints Masticatory disturbances due to restoration problems accounted for the largest amount of complaints with 151, followed by caries treatment with 70, and spontaneous pain with 69. Other complaints included the application of fluoride or prophylactic odontoplasty, abnormal arrangement of teeth, and orthodontic treatment. 6) Chief medical complaints were accounted for by dental caries with 167 complaints, followed by apical periodontitis with 57 and pulp diseases with 51. Diseases other than chief complaints showed dental caries with the most at 332, apical periodontitis at 57, pulp diseases with 42, and simple gingivitis and marginal periodontitis at 33. It may be concluded that conservative dentistry accounts for almost 85% of treatment and prosthodontics and oral surgery are scarcely used.journal articl
電気化学測定法による歯科用合金の腐食試験 : その3 回転ディスク電極を用いた対流ボルタンメトリ法の応用
Get PDFapplication/pdfHydrodynamic voltammetry is able to increase the accuracy of measurements to rotate the electrode. This study used hydrodynamic voltammetry by means of a rotating disk electrode to examine the corrosion mechanisms of three kinds of pure metals; gold, silver and copper, and six kinds of binary gold alloys. The results were compared with cyclic voltammograms in a statistical system. Hydrodynamic voltammetry provided rapid the steady corrosion reactions. Therefore this method was able to distinguish the elementary processes of chemicals and discharge.journal articl
歯科用エアータービン・ハンドピースの静音設計に関する検討 : 第1報 異なる形態のタービン翼の騒音測定と評価方法について
Get PDFapplication/pdfNoise reduction of an air turbine hand piece in general practice helps to reduce a patient's physical and psychological pain and suffering. The relationship has not been determined between the wing shape of an air turbine hand piece and noise. This study was conducted to evaluate the relationship between the noise of an air turbine hand piece and wing shapes, rotational frequencies and torque. The results were as follows; 1. The actual frequency of an air turbine hand piece whose pneumatics were changed from 0.5kgf/cm^2 to 3.0kgf/cm^2 almost coincided with predicted measurements. The results suggested that the noise of an air turbine hand piece was similar to an air blower piece. Furthermore, the kind of noise was nearly equal to that of the rotational noise of a moving blade. There was no evidence of a relationship between frequencies and wing shape. 2. When comparing standard and small types of turbine wings regarding rotational frequency the latter was less than 2.5kgf/cm^2. 3. Increased rotational frequencies were observed when the back of the turbine wings was slightly thinned. Rotational noises also increased with this type. 4. It was suggested that to maintain the torque of an air turbine hand piece a concave wing and closed structure should be used.journal articl