A torque removal study on the primary stability of orthodontic titanium screw mini-implants in the cortical bone of dog femurs

Impact of Insertion Depth and Predrilling Diameter on Primary Stability of Orthodontic Mini-implants

“…• implant design, [17][18][19][20][21] • bone quality (ie, thickness of cortical bone), 13,18 • implant site preparation (no predrilling vs predrilling depth and diameter), 18,22 and • insertion angle. 23 On the other hand, the length of the mini-implant as well as the predrilling depth in spongious bone do not have significant effects on insertion torques.…”

Ultraviolet photofunctionalization increases removal torque values and horizontal stability of orthodontic miniscrews

“…Fracture at the miniscrew can occur during removal if the removal torque exceeds the limits that the miniscrew can withstand. 40,41 The merits of photofunctionalization could be increased stability and resistance to exogenous force by a gain of bone area but not by a change in surface topography or tissue-surface intercuspation. Our SEM observation of interfacial failure implied that the increased anchorage of miniscrews by photofunctionalization was because of the increased tolerance against exogenous forces as a screw-bone complex rather than the increased adhesion between the screw and the bone.…”

Selecting the Proper Screw for the Case: Review

“…25,[32][33][34][35][36][37][38][39] Bunlar içinde kortikal kemik dansitesi, mini vidanın stabilitesinde en önemli faktör olarak düşünülür. 40 Ancak, Chen ve ark.nın çalışmasında; yaş, mini vidanın yerleştirildiği bölge, yumuşak dokunun ve maloklüzyonun tipi gibi faktörlerle mini vida stabilitesi arasında bir korelasyon bulunamamıştır.…”