Mi-Young Lee1, Jae Hyun Park2, Sang-Cheol Kim3, Kyung-Hwa Kang3, Jin-Hyoung Cho3, Jin-Woo Cho4, Na-Young Chang5, Jong-Moon Chae6. 1. Graduate student, Department of Orthodontics, School of Dentistry, Wonkwang University, Iksan, Korea. 2. Professor and chair, Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A. T. Still University, Mesa, Ariz; adjunct professor, Graduate School of Dentistry, Kyung Hee University, Seoul, Korea. 3. Professor, Department of Orthodontics, School of Dentistry, Wonkwang Dental Research Institute, Wonkwang University, Iksan, Korea. 4. Clinical associate professor, Department of Orthodontics, School of Dentistry, Wonkwang University, Daejeon Dental Hospital, Daejeon, Korea. 5. Assistant professor, Department of Orthodontics, School of Dentistry, Wonkwang Dental Research Institute, Wonkwang University, Iksan, Korea. 6. Professor, Department of Orthodontics, School of Dentistry, Wonkwang Dental Research Institute, Wonkwang University, Iksan, Korea; visiting scholar, Postgraduate Orthodontic Program, Arizona School of Dentistry and Oral Health, A. T. Still University, Mesa, Ariz; instructor, The Charles H. Tweed International Foundation, Tucson, Ariz. Electronic address: jongmoon@wonkwang.ac.kr.
Abstract
INTRODUCTION: The purpose of this study was to evaluate the effect of bone densities on the success rate of orthodontic microimplants with cone-beam computed tomography images. METHODS: We examined 127 orthodontic microimplants implanted into the maxillary buccal alveolar bone of 71 patients (53 female, 18 male; mean age, 19.2 years) with malocclusion. The cortical, cancellous, and total bone densities were measured with Simplant Pro 2011 software (version 13; Materialise, Leuven, Belgium), and the correlations between these measurements and the orthodontic microimplant success rates were evaluated with cone-beam computed tomography. RESULTS: The overall success rate was 85.0% (108 of 127). Sex, age, and side of placement were not significant factors for success in the results (P >0.05). The density of the cortical bone increased apically (3, 5, and 7 mm) from the alveolar crest, but in the cancellous bone it decreased. Whereas the orthodontic microimplant success rates significantly increased as cancellous bone density and total bone density increased (P <0.01), cortical bone density did not have a significant effect on the success rate (P >0.05). CONCLUSIONS: The success rate of orthodontic microimplants significantly increased with higher cancellous and total bone densities, whereas cortical bone density did not have a significant effect.
INTRODUCTION: The purpose of this study was to evaluate the effect of bone densities on the success rate of orthodontic microimplants with cone-beam computed tomography images. METHODS: We examined 127 orthodontic microimplants implanted into the maxillary buccal alveolar bone of 71 patients (53 female, 18 male; mean age, 19.2 years) with malocclusion. The cortical, cancellous, and total bone densities were measured with Simplant Pro 2011 software (version 13; Materialise, Leuven, Belgium), and the correlations between these measurements and the orthodontic microimplant success rates were evaluated with cone-beam computed tomography. RESULTS: The overall success rate was 85.0% (108 of 127). Sex, age, and side of placement were not significant factors for success in the results (P >0.05). The density of the cortical bone increased apically (3, 5, and 7 mm) from the alveolar crest, but in the cancellous bone it decreased. Whereas the orthodontic microimplant success rates significantly increased as cancellous bone density and total bone density increased (P <0.01), cortical bone density did not have a significant effect on the success rate (P >0.05). CONCLUSIONS: The success rate of orthodontic microimplants significantly increased with higher cancellous and total bone densities, whereas cortical bone density did not have a significant effect.