American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics · 2026
Success rate and complications of Bollard-modified miniplates for bone-anchored maxillary protraction in growing patients: A single-surgeon retrospective cohort study.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
De Bruyn Lieselotte, Scocca Veronica, Diez-Fraile Araceli, Swennen Gwen R J
Аннотация
INTRODUCTION: The objective of this study was to evaluate the success rate, stability, and complications of Bollard-modified miniplate anchorage for bone-anchored maxillary protraction (BAMP) in a large cohort of growing patients treated by a single surgeon with long-term follow-up.
METHODS: This retrospective cohort study included 299 growing patients with maxillary hypoplasia and Class III malocclusion who underwent Bollard-modified miniplate placement for BAMP between January 2007 and December 2019. A total of 1196 miniplates were placed. The mean follow-up duration was 4.2 years. Outcomes were assessed at both the miniplate level and the patient level. Patient-level logistic regression analysis was performed to evaluate the association of age at surgery and sex with adverse events.
RESULTS: The overall success rate of Bollard-modified miniplate anchorage was 96.5%. During orthodontic loading, 50 miniplates (4.2%) developed mobility or inflammation; after conservative management, 18 regained stability, 24 were removed and successfully replaced, and 8 were removed and not replaced. Complications were more frequent in the maxilla than in the mandible (odds ratio [OR], 3.09; 95% confidence interval [CI], 1.70-5.61; P <0.001). Younger age at surgery was independently associated with a higher likelihood of complications (OR, 0.70; 95% CI, 0.51-0.96; P = 0.025), miniplate removal (OR, 0.68; 95% CI, 0.48-0.98; P = 0.036), and miniplate replacement (OR, 0.62; 95% CI, 0.42-0.92; P = 0.018). Sex was not significantly associated with any of these outcomes.
CONCLUSIONS: Bollard-modified miniplate anchorage for BAMP showed high long-term success and low complication rates in growing patients. Complications were more frequent in the maxilla than in the mandible, and younger age was associated with a higher likelihood of adverse events. These findings support the use of Bollard-modified miniplates as a reliable skeletal anchorage system for BAMP in children and adolescents.
METHODS: This retrospective cohort study included 299 growing patients with maxillary hypoplasia and Class III malocclusion who underwent Bollard-modified miniplate placement for BAMP between January 2007 and December 2019. A total of 1196 miniplates were placed. The mean follow-up duration was 4.2 years. Outcomes were assessed at both the miniplate level and the patient level. Patient-level logistic regression analysis was performed to evaluate the association of age at surgery and sex with adverse events.
RESULTS: The overall success rate of Bollard-modified miniplate anchorage was 96.5%. During orthodontic loading, 50 miniplates (4.2%) developed mobility or inflammation; after conservative management, 18 regained stability, 24 were removed and successfully replaced, and 8 were removed and not replaced. Complications were more frequent in the maxilla than in the mandible (odds ratio [OR], 3.09; 95% confidence interval [CI], 1.70-5.61; P <0.001). Younger age at surgery was independently associated with a higher likelihood of complications (OR, 0.70; 95% CI, 0.51-0.96; P = 0.025), miniplate removal (OR, 0.68; 95% CI, 0.48-0.98; P = 0.036), and miniplate replacement (OR, 0.62; 95% CI, 0.42-0.92; P = 0.018). Sex was not significantly associated with any of these outcomes.
CONCLUSIONS: Bollard-modified miniplate anchorage for BAMP showed high long-term success and low complication rates in growing patients. Complications were more frequent in the maxilla than in the mandible, and younger age was associated with a higher likelihood of adverse events. These findings support the use of Bollard-modified miniplates as a reliable skeletal anchorage system for BAMP in children and adolescents.