title: Primary stability of self-drilling and self-tapping mini-implant in tibia of diabetes-induced rabbits.
abstract: Objective. This study aimed to evaluate effects of type 1 diabetes mellitus and mini-implant placement method on the primary stability of mini-implants by comparing mechanical stability and microstructural/histological differences. Methods. After 4 weeks of diabetic induction, 48 mini-implants (24 self-tapping and 24 self-drilling implants) were placed on the tibia of 6 diabetic and 6 normal rabbits. After 4 weeks, the rabbits were sacrificed. Insertion torque, removal torque, insertion energy, and removal energy were measured with a surgical engine on 8 rabbits. Remaining 4 rabbits were analyzed by microcomputed tomography (micro-CT) and bone histomorphometry. Results. Total insertion energy was higher in self-drilling groups than self-tapping groups in both control and diabetic groups. Diabetic groups had more trabecular separation in bone marrow than the control groups in both SD and ST groups. Micro-CT analysis showed deterioration of bone quality in tibia especially in bone marrow of diabetic rabbits. However, there was no statistically significant correlation between self-drilling and self-tapping group for the remaining measurements in both control and diabetic groups. Conclusions. Type 1 diabetes mellitus and placement method of mini-implant did not affect primary stability of mini-implants.
authors.affiliation: Department of Orthodontics, The Catholic University of Korea, Seoul, Republic of Korea.
authors.forename: Jea-Beom
authors.initials: JB
authors.lastname: Park
authors.affiliation: Department of Dentistry, National Medical Center of Korea, 245 Euljiro, Junggu, Seoul 100-799, Republic of Korea.
authors.forename: Eun-Young
authors.initials: EY
authors.lastname: Kim
authors.affiliation: Department of Pediatrics, School of Medicine, Chosun University, 30-1 Hakdong, Donggu, Gwangju 501-717, Republic of Korea.
authors.forename: Janghyun
authors.identifier: 0000-0002-1286-3140
authors.initials: J
authors.lastname: Paek
authors.affiliation: Department of Orthodontics, The Catholic University of Korea, Seoul, Republic of Korea.
authors.forename: Yoon-Ah
authors.initials: YA
authors.lastname: Kook
authors.affiliation: Department of Prosthodontics, School of Dentistry, Kyung Hee University, Hoegidong, Dongdaemungu, Seoul 130-701, Republic of Korea.
authors.forename: Do-Min
authors.identifier: 0000-0002-2065-6934
authors.initials: DM
authors.lastname: Jeong
authors.affiliation: Department of Dentistry, Korea University, 80 Gurodong, Gurogu, Seoul 152-703, Republic of Korea.
authors.forename: Il-Sik
authors.initials: IS
authors.lastname: Cho
authors.affiliation: Division of Orthodontics, School of Dentistry, University of California San Francisco, 707 Parnasus Avenue, San Francisco, CA 94143, USA.
authors.forename: Gerald
authors.initials: G
authors.lastname: Nelson