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導管破綻による逆流性唾液腺病変 : SLE患者の口唇腺生検の病理組織像
Get PDFapplication/pdfUsing extratubular efflux of periodic acid Schiff (PAS) positive material as a histological indicator of intra-salivary gland reflux, correlation of the PAS positive material and interstitial as well as salivary gland changes were analyzed in a surgical specimen of the labial gland of a SLE patient. Results: (1) Extratubular efflux of PAS positive material was seen around ruptured striated duct of the labial gland with mononuclear cell infiltration and duct ectasia, (2) The lesion involved was not only further accompanied with cell infiltration into the interstitial tissue, but also showed degeneration and exfoliation of the duct epithelium. Thus, it seems suitable to represent this lesion as a case of Extratubular Efflux Sialoadenopathy.journal articl
Frequency of Occurrence of Lateral Lesions in Maxillary Central Incisors
Get PDFapplication/pdfFrom approximately 10,000 preoperative radiographs kept on file, films of 227 endodontically treated maxillary central incisors, and of 55 untreated pulpless teeth, were selected and examined for the condition of the root canal filling and the presence of lateral and periapical lesions. Lateral lesions were found for no teeth that were completely filled or had partially filled but no unfilled portions of the canal, and for only 5 (3.1%) of 164 teeth having unfilled portions. Periapical lesions were recognized in 83.6% of untreated pulpless teeth, in 66.7% of treated teeth with partially filled canals, in 57.1% of those with unfilled canals, and in 21.6% of teeth with completely obturated canals.journal articl
昭和62年における冠・架工義歯に関する統計的観察 その1 単独冠について
Get PDFapplication/pdfA study was made of 945 crowns which had been fabricated for patients at the Prosthodontic Clinic of Matsumoto Dental College during 1987. Some of results are as follows; 1) 43.69% of the patients were males and 56.31% were females. 2) 87.16% of the patients were between 20 and 59 years old. 3) Crowns of the upper abutment teeth were more numerous than for the lower abutment teeth. 4) 71.96% of the crowns were fabricated for nonvital teeth. 5) 45.19% of the crowns were fabricated as full cast crowns, 21.59% as facing crowns (20.32% as porcelain fused to metal crowns, 1.27% as resin facing crowns), 10.79% as jacket crowns (9.42% as resin jacket crowns, 1.38% as porcelain jacket crowns), 21.80% as partial coverage crowns, and 0.63% as dowel crowns.journal articl
黒色色素産生Bacteroidesに対する口腔レンサ球菌の抗菌活性,抗菌物質の精製とその性状
Get PDFapplication/pdfFive bacterial strains which showed intense antimicrobial activity against Bacterioides gingivalis were isolated from gingival crevice materials. These bacteria were identified as Streptococcus sanguis based on their biological properties. The antimicrobial agent was found to be cell associated. Using one of the isolates (strain NF-10),the agent purified (from a cell extract prepared by ultrasonic treatment), by means of Q-Sepharose chromatography, gel filtration on Sephacryl S-300, further chromatography on hydroxylapatite column, and preparative polyacrylamide gel electrophoresis. A single stained protein band was observed in the PAGE of the purified antimicrobial agent. The specific activity increased 83.9-fold and the recovery was 15.3%. Its molecuar weight was 74,000 and pI was 4.5. The activity was lost on heating at 60℃ for 10 min. The action spectrum of this antimicrobial agent was narrow; of the 18 bacterial species examined, only B.gingivalis and B.intermedius were found to be inhibited by it.journal articl
歯科材料の電気化学的安定性に関する研究その3 金銀パラジウム合金の腐食傾向について
Get PDFapplication/pdfCorrosion tests were conducted for three types of Au-Ag-Pd alloys, containing various amounts of gold (5, 12, and 20% by weight). Half of the specimens of each alloy received homogenizing treatment only; the other half also received age hardening. One specimen of each alloy and each type of treatment was immersed in 1% lactic acid, another specimen in 0.05% HCl, and a third specimen in Ringer's solution. Immersion was for 7 days at 37℃ for all specimens. Quantitative analysis of the metal elements released in the solutions was performed by inductively coupled plasma emission spectrometry (ICP method). The relationship between surface roughness of the specimens and the amounts of released metal was also investigated. The results obtained are as follows. 1. Variation in the amount of gold influenced the amount of copper released into the solution, but had no effect on other elements. 2. Each type of solution exhibited a different mechanism of corrosion. 3. For all three alloys, the surface roughness of the specimen affected the degree of corrosion in Ringer's solution, but not in the acids.journal articl
拇指吸引癖を伴うアングルII級不正咬合の一治験例
Get PDFapplication/pdfA case was presented of Angle Class II malocclusion with maxillary protrusion associated with thumb-sucking over an extended period, from infancy to age 10. As the first objective of treatment was the elimination of thumb-sucking, we instructed the patient in myofunctional therapy. As this was unsuccessful after a year, we installed a palatal crib, which successsfully eliminated the pernicious habit. The maxillary first premolars were subsequently extracted, and the 2nd phase of treatment was begun with edgewise appliance to correct the occlusion. The result showed class I molar relation and good occlusion, and the soft-tissue profile was remarkably improved.journal articl
矯正歯科臨床への多目的用途をもつ日本人成長期頭部X線規格写真分析法についての研究
Get PDFapplication/pdfA recent cephalometric analysis of Japanese adolescents, which included many linear measurements not previously reported, was conducted and its data used to develop a new method for predicting two-years' growth. Longitudinal data were collected on 16 boys and 16 girls over a five-year period (1980-1985), from their fourth through ninth years in school. All subjects had normal occlusion and good skeletal relationship and profile. Because facial growth in boys continues several years later than in girls, 12 of the boys were followed for an additional two years. The analysis utilized 26 linear and 12 angular measurments, classed into five components: (1) cranial base, (2) maxilla and mandible, (3) facial height, (4) facial profile, (5) dental. Measurements of N-A (FH), N-B(FH), and A-B(OP), not previously reported in studies of Japanese adolescents, were found to be clinically useful for evaluation of the horizontal jaw relation. At present only Ricketts' Visualized Treatment Objective is utilized in Japan to forecast growth for diagnosis and treatment. The present study provides a new method for predicting growth over a two-year span based on the following measurements: S-N, PNS-ANS (FH), N-ANS (⊥FH), NF (FH), Y-Axis, Y-Axis-FH, MP (FH), li-A-Pg, and OP-FH. Because the data were recently collected, the present study also has potential value for clinical evaluations of the dental-skeletal discrepancies of patients from the norms for the modern Japanese population.journal articl