두개하악장애 환자의 하악운동에 관한 연구

허성주,김광남,장익태 대한 두개하악장애학회 1993 대한두개하악장애학회지 Vol.5 No.2

ABSTRACTThe purpose of this study was to evaluate the mandibular movements of TMD patients comparing to normal persons. Sirognathograph was used to measure five parameters of mandibular movements of twenty normal persons and eight TMDpatients. Five parameters were (1) Maximum opening during maximum opening and closing, (2) Mean velocity during maximum opening and closing, (3) Maximum opening during unilateral chewing, (4) Mean velocity during unilateral chewing, (5) Consistency of mandibular movement during unilateral chewing.Based on above results, new Mandibular Movement Index(M.M.L) was formulated and compared to Helkimo's Clinical Dysfunction Index by measuring two indices before treatment and 2 weeks, 4 weeks, 6 weeks, 8 weeks after treatment.The conclusions were as follows:1. The amounts of maximum opening and mean velocity during maximum opening and closing of TMD patients were less than those of normal persons (p<0.01). 2. The amounts of maximum opening and mean velocity during unilateral chewing of TMD patients were less than those of normal persons (p<0.05) (p<0.01). 3. Although TMD patients showed limited mandibular movements during unilateral chewing, the consistency of mandibular movements was better than that of normal persons (p<0.05). 4. Both mandibular movement index and Helkimo's Clinical Dysfunction Index, were useful in diagnosing TMD patients. The purpose of this study was to evaluate the mandibular movements of TMD patients comparing to normal persons. Sirognathograph was used to measure five parameters of mandibular movements of twenty normal persons and eight TMDpatients. Five parameters were (1) Maximum opening during maximum opening and closing, (2) Mean velocity during maximum opening and closing, (3) Maximum opening during unilateral chewing, (4) Mean velocity during unilateral chewing, (5) Consistency of mandibular movement during unilateral chewing. Based on above results, new Mandibular Movement Index(M.M.L) was formulated and compared to Helkimo's Clinical Dysfunction Index by measuring two indices before treatment and 2 weeks, 4 weeks, 6 weeks, 8 weeks after treatment. The conclusions were as follows: 1. The amounts of maximum opening and mean velocity during maximum opening and closing of TMD patients were less than those of normal persons (p<0.01). 2. The amounts of maximum opening and mean velocity during unilateral chewing of TMD patients were less than those of normal persons (p<0.05) (p<0.01). 3. Although TMD patients showed limited mandibular movements during unilateral chewing, the consistency of mandibular movements was better than that of normal persons (p<0.05). 4. Both mandibular movement index and Helkimo's Clinical Dysfunction Index, were useful in diagnosing TMD patients.

식품의 물성이 저작근의 활성도 및 저작 양태에 미치는 영향

허성주,조리라,김광남 대한 두개하악 장애학회 1997 대한두개하악장애학회지 Vol.9 No.2

To elucidate the effects of food texture such as hardness, cohesiveness, adhesiveness on mastication procedure, the electromyographic activity (EMG) of the masticatory muscles and the chewing movements were analyzed in eighteen young subjects during ordinary chewing. Seven different foods were selected by sensory texture profiling and mechanical test with texturometer; egg white, sausage, pizza cheese, yang-geng, biscuit, peanut and almond. The indexes of jaw movements used were the chewing number, chewing time, maximum opening, average opening, closing velocity and opening velocity. The EMG indexes analyzed were maximum and average integrated amplitude of the anterior temporal and masseter muscles. The results obtained were as follows. 1. The chewing time and chewing number, mandibular displacement and mandibular movement velocity were not changed by the hardness, cohesiveness and adhesiveness of the food (p>0.05). 2. The harder food materials showed a higher amplitude of the anterior temporal muscle integrated EMGs than the softer ones (p<0.05). 3. The maximum and average integrated EMGs of the masseter muscle increased with the increase of hardness of the food (p<0.05). 4. The integrated EMGs of preferred side and non-preferred side masticatory muscles increased with the increase of hardness of the food (p<0.05). 5. The adhesiveness and cohesiveness of the food were not the determining factor to the integrated EMGs of masticatory muscles (p<0.05).

치아마모와 하악운동 및 전방유도와의 관계

허성주 대한두개하악장애학회 1995 대한두개하악장애학회지 Vol.7 No.1

The important causes of tooth wear were abrasion, erosion and attrition. Although there were occlusal wear in all persons, the severity of tooth wear were very different from person to person and area to area. The tooth contact patterns during chewing could be related with occlusal wear. There were two types of chewing patterns. One was chopping chewing pattern like carnivorous animal and the other was grinding chewing pattern like hernivorous animal. The purpose of this research was to study the relationship among tooth wear, chewing patterns and incisal guidances. 90 dental student, who had normal mandibular movements, normal chewing function and no occlusal restorations, had recording of chewing movements with Sapon Visitrainer. 12 students of chopping chewing group and 12 students of grinding chewing group were selected. Alginate impression were taken and stone model of each student were made. Ordinal scale was used to evaluate the degree of tooth wear for chopping chewing group and grinding chewing group. Incisal guidances of each student were measured and compared to chewing pattern and tooth wear. t-test was to used to evaluate the differnece of tooth wear between two groups. The correlation between incisal guidance and tooth wear was statisticaly evaluated with SPSS. The conclusions were following ; 1. The anterior teeth showed greater tooth wear than posteriror teeth in both groups.(P<0.01). 2. The chopping chewing group showed less tooth wear in anterior teeth, upper teeth, lower teeth, and all teeth than grinding chewing group. (P<0.05) 3. Incisal guidance of the chopping chewing group were not different from that of the grinding chewing group.(P>0.05) 4. The incisal guidance was not statistically related with tooth wear.(P>0.05)

시각장애인의 유산소성 운동이 체력에 미치는 영향

박재성,김주혁,황영성,김도호,이수판,한성유,허정석 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

This research fulfilled the program of aerobic exercise for living during 6 months with seven men and women who are disabled people with visual impairment, The program consists or gym, swimming, aerobic and running, During 6 months, all exercises were executed 1 hours, twice a week for 6 weeks. Each exercise had self-servant and was carried out 60 minutes with teaching method of special directors in every weep Physique by height, weight, condition of exercise ability by the capacity of the lungs of the heart and lung endurance and intake of the maximum oxygen, muscular strength of stomach, grasping power, pliability by forward bending with the upper part of the body, instantaneous force of muscle in a sudden jump, muscular endurance by put-up and sit-up, agility by side-step and response of the whole body, and balance by one leg standing while closing eyes as using Helmas (sewoo systems korea) were measured. The Results, 1.There is a significant difference for both men and women in the capacity of the lungs and the heart and lung endurance, However only women have a significant difference in intake of the maximum oxygen. 2. Both men and women have a significant difference in muscular strength of stomach and grasping power to measure muscular strength. 3. Both men and women have a significant difference in forward bending with the upper part or the body to measure flexibility. 4. Sudden jump to measure instantaneous force of muscle, sit-up, and push-up to measure muscular endurance show that both men and women have a significant difference.(p<.01) 5. Side-step and response of the whole body to measure agility show that both men and women have a significant difference. 6. One leg standing with closing eyes to measure balance show that both men and women have a significant difference.

전자 서베잉을 이용한 서베이드 금관과 국소의치 프레임워크 디자인

홍용신,박은진,김성균,곽재영,허성주,박지만 大韓齒科保存學會 2011 Restorative Dentistry & Endodontics Vol.36 No.6

구강 스캐너와 CAD/CAM 기술로 인해 컴퓨터로 제작하는 방식이 활발히 보급된 고정식 보철 증례와는 달리, 의치를 디지털 방식으로 제작하는 데에는 아직 한계가 많다. 촉각을 느낄 수 있는 입력 장비와 전자 서베잉의 개념, 그리고 쾌속 조형법의 적용으로 인해 국소의치를 디지털로 제작할 수 있는 솔루션이 최근 소개되고 있다. 본 증례보고에서는 이러한 국소의치의 디지털 솔루션을 이용하여 총 다섯 명의 환자에서 서베이드 금관 및 국소의치를 제작하였다. 인상 과정상의 문제로 모형과 실제 치아 사이의 형태적 차이가 있었던 경우를 제외하고는 국소의치의 적합도는 우수했으며, 장착 후 안정성과 착탈 시의 유지력 또한 임상에서 적용하는 데에 문제가 없었다. There are still many limitations on fabricating dentures using digital method while computerized production of fixed prostheses utilizing intraoral scanner and CAD/CAM technology has propagated rapidly. Recently the digital solution of fabricating removable partial denture by applying haptic input device, electronic surveying, and rapid prototyping was introduced. In this case presentation, five patients were treated with surveyed crown and removable partial dentures by this digital solution. Fit of dentures was excellent except for one case which showed morphological difference between the actual teeth and that of master cast by the erroneous impression process. There also was not any problem of stability and retention after adaptation in the clinical setting.

구강 내 디지털 인상채득을 통한 맞춤형 지대주와 시멘트 합착 후 나사형 임플란트 보철 수복 증례

홍용신,박은진,김선종,김명래,허성주,박지만 대한치과보철학회 2012 대한치과보철학회지 Vol.50 No.1

최근 디지털 인상채득 시스템이 개발되면서 이를 기존의 CAD/CAM 시스템과 접목한 인레이, 온레이, 크라운이나 간단한 계속가공의치 등의 고정성 보철물의 제작이 활발히 소개되고 있다. 그러나 임플란트 보철에서는 주로 기존의 아날로그식 인상채득 후 이를 스캔하여 제작하는 방법이 사용되어 왔으나, 구강 내 디지털 스캔한 데이터를 이용하여 나사형 보철물을 제작하는 술식은 아직 활발히 이루어지지 않았다. 이에 본 증례보고에서는 6명의 환자를 대상으로 구강 내 스캐너인 iTero를 사용하여 디지털 스캔을 시행한 후 그중 다섯명은 맞춤형 지대주와 시멘트 합착 후 나사형 임플란트 보철물(screw-retained implant prosthesis after cementation, or SCRP)을 제작하였고, 임상적으로 기능과 심미적인 측면으로 만족할 만한 결과를 얻었기에 이를 보고하고자 한다. Fixed dental prostheses such as inlay, onlay, crown, and bridge fabricated by CAD/CAM technique combined with digital impressions is getting popular due to the recent rapid progress of digital impression taking system. For the scope of implant prosthesis, however, digital intra-oral scan hasn’t been actively utilized for the fabrication of superstructures. In this case report, 6 cases of titanium-milled custom abutment based on the iTero intra-oral scan data were introduced, five of them were restored with screw-type prosthesis after cementation (SCRP) and the clinical results were satisfactory on restoring the function and esthetics.

Optimization of growth inducing factors for colony forming and attachment of bone marrow-derived mesenchymal stem cells regarding bioengineering application

Seong-Kyun Kima,Seong-Joo Heo,Jai-Young Koak,Joo-Hee Lee,Hongxuan Quana 대한치과보철학회 2014 The Journal of Advanced Prosthodontics Vol.6 No.5

PURPOSE These days, mesenchymal stem cells (MSCs) have received worldwide attention because of their potentiality in tissue engineering for implant dentistry. The purpose of this study was to evaluate various growth inducing factors in media for improvement of acquisition of bone marrow mesenchymal stem cells (BMMSCs) and colony forming unit-fibroblast (CFU-F). MATERIALS AND METHODS The mouse BMMSCs were freshly obtained from female C3H mouse femur and tibia. The cells seeded at the density of 106/dish in media supplemented with different density of fetal bovine serum (FBS), 1α, 25-dihydroxyvitamin (VD3) and recombinant human epidermal growth factor (rhEGF). After 14 days, CFU-F assay was conducted to analyze the cell attachment and proliferation, and moreover for VD3, the 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay was additionally conducted. RESULTS The cell proliferation was increased with the increase of FBS concentration (P<.05). The cell proliferation was highest at the density of 20 ng/mL rhEGF compared with 0 ng/mL and 200 ng/mL rhEGF (P<.05). For VD3, although the colony number was increased with the increase of its concentration, the difference was not statistically significant (P>.05). CONCLUSION FBS played the main role in cell attachment and growth, and the growth factor like rhEGF played the additional effect. However, VD3 did not have much efficacy compare with the other two factors. Improvement of the conditions could be adopted to acquire more functional MSCs to apply into bony defect around implants easily.

A STUDY ON THE EFFECTS OF CENTRIC RELATION OCCLUSION-MAXIMUM INTERCUSPATION DISCREPANCIES TO DENTAL WEAR

Heo, Seong-Joo,Hong, Min-Ah,Kim, Kwang-Nam 대한 두개하악 장애학회 1997 대한두개하악장애학회지 Vol.9 No.2

치아경조직의 소실은 반드시 치아우식증이나 사고에 의해서만 일어나는 것이 아니라 마모에 의해서도 일어난다. 마모에 영향을 미치는 인자들은 시간/나이, 성별, 이갈이와 같은 과기능, 저작력, 위장관장애, 음식물, 환경적인 영향, 타액의 상태 그리고 교합적인 조건들이 있다. 한편 중심위와 최대교두감합위 불일치가 악구강계에 미치는 영향에 관해서는 아직도 논란이 분분하다. 본 연구의 목적은 중심위와 최대교두감합위의 불일치가 치아마모에 미치는 영향과 중심위에서 제일 먼저 담는 치아와 나머지 치아의 마모에 있어서 차이에 대해서 알아 보는 것이다. 본 연구는 두개하악관절과 저작습관에 이상이 없으며, 식이습관에 문제가 없으며 치아우식증과 치주질환, 수복물, 교정 또는 교합치료의 경험이 없는 21세에서 25세 사이의 서울대학교 치과대학생을 대상으로 하였다. 교합기를 이용하여 중심위 교합-최대교두교두감합위 불일치를 조사하여, 중심위 교합-최대교두감합위가 불일치가 작은 군과 큰 군으로 나누었다. 각 군은 각각 10명의 피검자들로 구성되었다. 각 피검자의 인상채득 후 CR mounting을 시행하고 중심위교합-최대감합위 불일치를 측정한 다음 임상검사로 ordinal scale을 측정하고 모형을 통해 arbitrary scale을 측정하였다. 평균치아마모도 그리고 중심위에서 먼저 닿는 치아와 나머지 치아, 나머지 구치의 마모도를 각각 조사하여 통계처리하였다. 1. 평균치아마모도는 ordinal scale로 측정하였을 매 중심위 교합-최대교두감합위 블일치가 작은 군과 큰 군 사이에 통계적으로 유의할만한 차이가 없었다(p>0.05). 2. 평균치아마모도는 arbitary scale로 측정하였을 때 중심위 교합-최대교두감합위 불일치가 작은 군과 큰 군 사이에 통계적으로 유의할만한 차이가 없었다(p>0.05). 3. CR에서 먼저 닿는 치아와 나머지 치아,나머지 구치의 마모도는 ordinal scale로 측정하였을 때 통계적으로 유의한 차이가 없었다(p>0.05). 4. CR에서 먼저 닿는 치아와 나머지 치아,나머지 구치의 마모도는 arbitrary scale로 측정하였을 때 먼저 담는 치아에서 통계적으로 유의한 높은 수준의 마모도를 보였다(p<0.05). Loss of hard tooth substance may be caused by factors other than caries and trauma, such as attrition, abrasion, erosion. There were many factors that could influence the type and rate of wear. These factors were time/age, gender, occlusal conditions, hyperfunction, bite force, gastrointestinal disturbances, nutrition, environmental factors, salivary factors, and other factors. On the other hand, a great deal of controversy exists regarding the effects of CRO-MI discrepancies. The purposes of this study were 1) to evaluate the amounts of CRO-MI discrepancies on the dental wear 2) to evaluate the difference of dental wear between initially contacted teeth in CR and the other teeth. 260 students of Seoul National University Dental College were examined. Those persons who had bad dietary, environmental, working, and parafunctional factors were excluded. Centric relation occlusion-maximum intercuspation discrepancies were estimated on an articulator. 10 depending on the amount of discrepancies students were selected in each group. Group 1 showed less than 0.5㎜ horizontl and vertical discrepancies and group 2 showed more than 1.5㎜ horizontal and vertical discrepancies. The dental wears were evaluated with ordinal scale in mouths and with arbitrary scale on dental casts. And the wear values of initially contacted teeth in CR and the other teeth, the other posterior teeth were compared. 1. The mean dental wear values in all teeth, by ordinal scale, were not significantly different between the Group 1 and Group 2 (p>0.05). 2. The mean dental wear values in all teeth, by arbitrary scale, were not significantly different between the Group 1 and Group 2 (p>0.05). 3. The dental wear values, by ordinal scale, were not significantly different between the initially contact teeth and the other teeth, the other posterior teeth (p<0.05). 4. The dental wear values, by arbitrary scale, were significantly greater in initially contacted teeth than other teeth, and other posterior teeth (p>0.05).

HRI(Human-Robot Interaction)디자인에 있어 감성표현 요소에 관한 연구

허성철(Heo Seong-Cheol),장영주(Jang Young-Joo),홍성수(Hong Seong-Soo),김억(Kim Eok) 한국디자인학회 2006 한국디자인학회 학술발표대회 논문집 Vol.- No.-

BIOMECHANICS OF ABUTMENTS SUPPORTING REMOVABLE PARTIAL DENTURES UNDER UNILATERAL LOADING

Kim, Seong-Kyun,Heo, Seong-Joo,Koak, Jai-Young,Lee, Jeong-Taek,Roh, Hyun-Ki,Kim, Hyo-Jin,Lee, Seok-Hyung,Lee, Joo-Hee The Korean Academy of Prosthodonitics 2007 대한치과보철학회지 Vol.45 No.6

Statement of problem. In distal extension removable partial denture, the preservation of health of abutment teeth is very important, but abutment teeth are subjected to unfavorable stress under unilateral loading specially. Purpose. The purpose of this study was to investigate the biomechanical effects of mandibular removable partial dentures with various prosthetic designs under unilateral loading, using strain gauge analysis. Material and methods. Artificial teeth of both canines were anchored bilaterally in a mandibular edentulous model made of resin. Bilateral distal extension removable partial dentures with splinted and unsplinted abutments were fabricated. Group 1: Clasp-retained mandibular removable partial denture with unsplinted abutments Group 2: Clasp-retained mandibular removable partial denture with splinted abutments by 6-unit bridge. Group 3: Bar-retained mandibular removable partial denture Strain gauges were bonded on the labial plate of the mandibular resin model, approximately 2 mm dose to the abutments. Two unilateral vertical experimental loadings (30N and 100N) were applied subsequently via miniature load cell that were placed at mandibular left first molar region. Strain measurements were performed and simultaneously monitored from a computer connected to data acquisition system. For within-group evaluations, t-test was used to compare the strain values and for between-group comparisons, a one-way analysis of variance (ANOVA) was used and Tukey test was used as post hoc comparisons. Results. The strain values of group 1 and 2 were tensile under loadings. In contrast, strain values of group 3 were compressive in nature. Strain values increased as the applied load in increased from 30N to 100N (p<.05) except for right side in group 1. Under 30N loading, in left side, group 1 showed higher strain values than groups 2 and 3 in absolute quantity (p<.05). And group 2 showed higher strain values than group 1 (p<.05). In right side, group 1 and 2 showed higher strain values than group 3 in absolute quantity (p<.05). Under 100N loading in left side, group 1 showed higher strain values than groups 2 and 3 in absolute quantity (p<.05). And group 2 showed higher strain values than group 1 (p<.05). In right side, group 1 and 2 showed higher strain values than group 3 in absolute quantity (p<.05). Under 30N loading, group 2 and 3 showed higher strain values in right side than in left side. Under 100N loading, right side strain values were higher than left side ones for all groups. Conclusion. Splinting of two isolated abutments by bridge reduced the peri-abutment strain in comparison with unsplinted abutments under unilateral loading. Bar-retained removable partial denture showed the lowest strain of three groups, and compressive nature.