Oral surgery, oral medicine, oral pathology and oral radiology · 2016
Stability of large maxillary advancements using a combination of prebent and conventional plates for fixation.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
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.
Ragaey Marwa, Van Sickels Joseph E
Аннотация
OBJECTIVE: The purpose of this study was to determine the stability of one and two jaw maxillary advancements fixed with prebent plates and "L"-shaped plates.
STUDY DESIGN: Twenty-six patients met the inclusion criteria (group 1: one jaw [14]; group 2: two jaws [12]). Radiographs were digitized before surgery (T1), immediately after surgery (T2), at 6 weeks (T3), and at 6 months (T4). Stability was assessed comparing A-point movement and change in palatal plane. t tests were used for comparisons between groups, and linear regression analysis was used to assess the stability of A-point T2-T4 versus A-point movement T1-T2 and changes in the palatal plane T1-T2.
RESULTS: Initial A-point movement between the two groups was significant (group 1 = 7.61 ± 1.73; group 2 = 5.22 ± 1.67) (P = .0002). Both showed relapse (group 1 = 0.78 ± 0.95; group 2 = 0.04 ± 0.49). Although there was no significant relationship between initial A-point movement and relapse, there was a significant negative relationship between change in palatal plane and relapse in group 1. When initial A-point movement and change in palatal plane were combined, as both increased, relapse also increase (P = .007; R2 = 0.41).
CONCLUSIONS: Prebent plates used with "L" plates are a stable fixation technique. Relapse increases with large advancements and change in palatal plane (posterior impaction).
STUDY DESIGN: Twenty-six patients met the inclusion criteria (group 1: one jaw [14]; group 2: two jaws [12]). Radiographs were digitized before surgery (T1), immediately after surgery (T2), at 6 weeks (T3), and at 6 months (T4). Stability was assessed comparing A-point movement and change in palatal plane. t tests were used for comparisons between groups, and linear regression analysis was used to assess the stability of A-point T2-T4 versus A-point movement T1-T2 and changes in the palatal plane T1-T2.
RESULTS: Initial A-point movement between the two groups was significant (group 1 = 7.61 ± 1.73; group 2 = 5.22 ± 1.67) (P = .0002). Both showed relapse (group 1 = 0.78 ± 0.95; group 2 = 0.04 ± 0.49). Although there was no significant relationship between initial A-point movement and relapse, there was a significant negative relationship between change in palatal plane and relapse in group 1. When initial A-point movement and change in palatal plane were combined, as both increased, relapse also increase (P = .007; R2 = 0.41).
CONCLUSIONS: Prebent plates used with "L" plates are a stable fixation technique. Relapse increases with large advancements and change in palatal plane (posterior impaction).