Jung‐Yul Cha
연세대학교 의공학부 · 치의학
Jung-Yul Cha 교수의 연구실은 치의공학 및 임플랜트 생체역학 분야에서 첨단 디지털 기술과 생체재료의 융합을 중심으로 연구를 진행하고 있습니다. 특히, 3D 프린팅, CAD/CAM 기반 맞춤형 치열 보정장치, 미세impl란트의 생체역학적 반응, 그리고 열가공 및 3D 프린팅 방식의 클리어 앤얼러의 물리적 특성 분석에 중점을 두고 있습니다. 연구는 임상 적용에 적합한 재료 및 기구의 설계 최적화를 목표로 하며, 생체적 안정성과 기능성 향상을 추구합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Implants placed with high insertion torque (IT) typically exhibit primary stability, which enables early loading. Whether high IT has a negative impact on peri-implant bone health, however, remains to be determined. The purpose of this study was to ascertain how peri-implant bone responds to strains and stresses created when implants are placed with low and high IT. Titanium micro-implants were inserted into murine femurs with low and high IT using torque values that were scaled to approximate t
PCA-S showed minimal FR among the ceramic brackets, and was comparable to the conventional SS bracket. The silica layer and rounded edges of the ceramic slot lowered FR considerably.
The present study compared the thickness and gap width of thermoformed and 3D-printed clear aligners (CAs) using micro-computed tomography (micro-CT) and evaluated their translucency using spectrophotometer. Four groups of CAs were tested: thermoformed with polyethylene terephthalate glycol (TS) or copolyester-elastomer combination (TM), and 3D-printed TC-85 cleaned with alcohol (PA) or with centrifuge (PC). CIELab coordinates were measured (n = 10) to evaluate translucency. CAs (n = 10) were fi
In this dog model, the tapered miniscrew design increased initial stability until 3 weeks of loading but had no additional effect on the secondary stability (ie, after 12 weeks of loading) versus a cylindric miniscrew design.
Based on three-dimensional scanning and computer-aided design and computer-aided manufacturing (CAD/CAM) techniques, customized bracket systems are increasingly used. However, data remain limited regarding customized bracket design, characteristics, and stability. This study was undertaken to evaluate the design, bond strength, and residual adhesives of four different CAD/CAM customized brackets that were attached to human tooth specimens by indirect bonding. Thirty extracted human upper premola
Digital models can be used for measuring crowding in both mild and severe crowding cases. However, crowding measured by digital models tends to be lesser than that measured by cast models, and this should be considered during clinical application.
Histologic and microCT analysis showed that immediate loading of mini-implants in the dog model is possible for orthodontic applications with a high bone-implant contact and 100% survival rate.
