http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
토끼 경골에서 치과용 임프란트의 이중 산부식 및 양극 산화 표면처리에 따른 조직계측학적 연구
한예숙,김일규,장금수,박태환,전원,Han, Ye-Sook,Kim, Il-Kyu,Chang, Keum-Soo,Park, Tae-Hwan,Jeon, Won 대한악안면성형재건외과학회 2006 Maxillofacial Plastic Reconstructive Surgery Vol.28 No.5
This study was performed to evaluate the effects of three different implant surface treatments to the bone formation during osseous healing period under unloading conditions. Machined, double-acid etched and anodic oxidized implants were inserted into tibia of 3.0 - 3.5 kg NZ white male rabbits and 2 animals of each group were sacrificed at 2, 4 and 8 weeks. The specimens containing implant was dehydrated and embedded into hard methylmethacrylate plastic. After grinding to $50{\mu}m$, the specimens were stained with Villanueva bone stain. From each specimen, histomorphometric evaluation and the bone implant contact rate were analysed with optical microscope. The results were as follows; 1. In the scanning electronic microscopic examination, machined surface implant had several shallow and paralleled scratches on plain surface, double acid-etched implant had lots of minute wrinkles, rough valley and also irregularly located craters that looked like waves, anodic oxidized surface implant had porosity that minute holes were wholly distributed on the surface. 2. After 2 weeks of implantation, the percentages of bone-to-implant contact in the machined implant, double acid-etched implant and anodic oxidized implant were 26.85%, 62.64% and 59.82%, after 4 weeks of implantation they were 64.29%, 77.85% and 75.23%, and after 8 weeks they were 82.66%, 85.34% and 86.39%. 3. After 2 weeks of implantation, the percentages of bone area between threads in the machined implant, double acid-etched implant and anodic oxidized implant were 21.55%, 42.81%, and 40.33%, after 4 weeks of implantation they were 49.32%, 62.60% and 75.56%, and after 8 weeks they were 71.62%, 87.73% and 83.94%. In summary, percentages of implant surface contacted to bone trabeculae and bone formation area inside threads in double acid-etched implants and anodic oxidized implants were greater than machined implants in early healing stage. These results suggest that double acid-etched and anodic oxidized surface implants could reduce the healing period for osseointegration and may enable to do early function.
임플란트 외형및 나사형태에 따른 응력 분산의3차원 유한요소법적 분석
김일규,류승현,김주록,민동환,한예숙,송국현,손충렬,변효인 대한악안면성형재건외과학회 2004 Maxillofacial Plastic Reconstructive Surgery Vol.26 No.5
The design of the implant is developing in the direction of which the implant can sustain the impact of the intra-oral biologic load and to disperse the load adequately to the surrounding bone. In this study, based upon the implant and thread designs, we have assessed the equivalent stress and equivalent strain in the cortical and cancellous bone with finite element analysis when under 100N vertical force and 20N horizontal force were simultaneously loaded on the following 6 different kinds of implant design and 4 different kinds of thread design. According to the results, the cylinder type or cylinder and tapered type is the most favorable design in the same diameter. To supplement the shortcoming of the tapered type and stepped cylinder type in the respect of design and project area, it is better to increase the diameter of the implants. The square and reverse threads are better than triangular and plateau thread in the respect of maximum equivalent stress and strain in the cortical and cancellous bone and project area.
구치부 부분 무치악 결손에서 유용한 세 가지 임프란트 수복법들의 응력분산에 관한 3차원 유한요소법적 비교연구
김일규(Il-Kyu Kim),이성호(Hyeung-Uk Lee),류승현(Seung-Hyun Ryu),최진호(Jinho Choi),한예숙(Ye-Sook Han),손충렬(Choong-Yul Son),변효인(Hyo In Byun) 대한구강악안면외과학회 2004 대한구강악안면외과학회지 Vol.30 No.3
In this study, three treatment options to replace two posterior missing teeth were investigated using three dimensional finite element analysis: two wide(∅5.0mm) implants(the experimental model I), two standard(∅3.75mm) implants(the experimental model II), and three standard(∅3.75mm) implants(the experimental model III). Two kinds of load case were applied ; 1) perpendicular on occlusal surface(axial load), parallel on occlusal surface(lateral load). 2) perpendicular on occlusal surface(3mm lateral to central point). The results obtained from this study were as follows; value of Von-mises stress (equivalent stress) was smallest in the two wide implant among the three experimental models. It was reported that the diameter is the efficient factor than osseointegrated surface area.