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주 연결장치의 설계변화에 따른 하악 유리단 국소의치의 광탄성 응력 분석에 관한 연구
이규칠,계기성,Lee, Kyw-Chil,Kay, Kee-Sung 대한치과보철학회 1991 대한치과보철학회지 Vol.29 No.2
The purpose of this study was to analyze the magnitude and distribution of stress using a photoelastic model from a distal extension removable partial dentures with three kinds of mandibular major connectors, that is, lingual bar, linguoplate, and swing-lock attachment. A photoelastic model was made of the epoxy resin(PC-1) and hardener(PCH-1) and coated with plastic cement-1 (PC-1) at the lingual surface of the epoxy model and set with three kinds of chrome-cobalt removable partial dentures. A bilateral vertical load of 15kg to the middle portion of the metal bar crossing both the first molars of the right and the left, and a unilateral vertical load of 12.5kg to the right first molar were applied with the use of specially designed loading device and the reflective circular polariscope was used to analyze the photoelastic model under each condition. The following results were obtained : 1. When the bilateral vertical load was applied, the magnitude and distribution of the stress concentration of the edentulous area and the terminal abutment or adjacent teeth was in the order of lingual bar, linguoplate, swing-lock attachment. 2. When the unilateral vertical load was applied, the magnitude and distribution of the stress concentration of the edentulous area and the terminal abutment or adjacent teeth was in the order of lingual bar, linguoplate, swing-lock attachment. 3. When the unilateral vertical load was applied, the magnitude and distribution of the stress concentration of the termial abutment or adjacent teeth on the non-loaded side showed the least stress distribution in case of swing-lock attachment. 4. When the bilateral vertical load and the unilateral vertical load were applied the swing-lock attachment showed the mildest uniform stress distribution on the edentulous area and the alveolar bone around the abutment teeth.
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THE EFFECT OF INCINERATED TOOTH PARTICLES ON OSTEOGENESIS ACCORDING TO PARTICLE SIZE
이규칠,윤창근,Lee, Kyu-Chil,Yoon, Chang-Keun The Korean Academy of Prosthodonitics 1987 대한치과보철학회지 Vol.25 No.1
본 실험의 목적은 치아 회분이 입자 크기에 따라 골형성에 어떠한 영향을 주며 순수 합성수산화 apatite인 calcitite와는 어떠한 차이가 있는가를 평가하기 위하여 수행하였다. 이를 위하여 200mesh와 40mesh의 치아 회분말과 40mesh calcitite를 잡종견의 신선한 발치와에 매식후 1주, 2주, 3주, 4주에 각각 희생하여 임상, X-선상 및 현미경적으로 관찰한 바 다음과 같은 결론을 얻었다. 1. 모든 경우에 조직의 거부반응이 없었다. 2. 40mesh치아 회분의 경우가 200mesh의 치아회분의 경우 보다 골 형성 능력이 현저히 높았다. 3. 40 mesh 치아회분과 calcitite 모두 비교군에 비하여 골 형성이 지연되었다. 4. 40 mesh 치아 회분과 calcitite의 골 형성 능력은 유사하였다.
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계기성,이규칠,박상윤,유진영 朝鮮大學校 口腔生物學硏究所 1990 Oral Biology Research (Oral Biol Res) Vol.14 No.-
Authors had the patient wear the upper and lower temporary restoration by which the vetical dimension was raised using the remaining lower removable partial denture for about 4 weeks to evaluate the sign and symptom of temporomandibular joint and the equilibration of the masticatory muscle for the patient who had 'a lost vertical dimension caused by not wearing upper and lower removable partial denture for a long time. The purpose of this clinical study was to evaluate and provide anterior guidance and esthetics by raising and restoring the vertical dimension lost in the past using the remaining lower removable partial denture. The anterior guidance, in connection with centric relation and vertical dimension, must be regarded as the most important factor in reconstructing th stomatognatic system. The informaition for the posterior and anterior tooth morphology can be attained system. The information for the posterior and anterior tooth morpholoty can be attained solely through the anterior guidance and clinical observation. In the presence of a functional anterior guidance, the recording of the condylar paty is unnecessary. The only information which is obtained through the pantographic system is one form of a posterior tooth morhpology which relates to the TMJ anatomy. The anterior guidance, however, with its influence on the lingual contours of the maxillary anterior teeth and in connection with other factors, will more or less determine the position and length teeth. The height and incline of the cusps and the depth of the central fossae are dependent on the steepness or flatness and length of the anterior guidance path. Therefore, one can conclude that in the presence of an anterior disocclution, the occlusal morphology can be determined by the anterior guidance system and clinical observation. From this clinical study, the good results were obtained phonetically, functionally and esthetically by the replacement of the porcelain fused to metal bridge of the upper 1st bicuspids and the upper and lower anterior teeth after an appropriate anterior guidance was established first and then by the delivery of the conventional upper removable partial denture and the lower removable partial denture using key and keyway attachment.
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정재헌,이규칠 朝鮮大學校 口腔生物學硏究所 1989 口腔生物學硏究 Vol.13 No.-
Despite the development of new impression technique for complete lower dentures, the achievement of adequate retention, support, and stability still remains a devinite problem for many patients. Correct extension of the complete lower denture base is not only essential for the development of retentive forces to best advantage, but it is a prerequisite of maximum stability. But the correct design of the lingual flange of a complete denture continues to challenge the skill and imagination of the dental profession. Owing to limited mobility of the muscles, frena, and membranous attachments, the buccal and labial flanges are more easily managed. Unfortunately, the floor of the mouth rises and falls like the tides of the sea, lengthening and widening the protean lingual vestibule. Therefore, in this articlewe discussed (1) the anatomy of the lingual space and principles underlying lingual design, (2) a technoque for achieveing an optimum lingual flange. If, in the construction of difficult lower dentures, the consideration is given to the dynamic nature of the denture space, it is easier to make satisfactory lower dentures.
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