European journal of orthodontics · 2026
Compensatory characteristics and influencing factors of the sagittal curvature of the maxillary arch based on three-dimensional fusion imaging.
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.
Li Wei, Meng Chenda, Li YuWei, Ning Xiner, Chen Gui, Su Hong, Xu Tianmin
Аннотация
OBJECTIVE: To analyze the compensatory characteristics and influencing factors of the maxillary arch curvature in the sagittal plane.
METHODS: A total of 537 pre-treatment cases with cone beam computed tomography (CBCT) and digital dental model were included. CBCT images and dental models were registered and fused to obtain landmark coordinates of the integrated models. On the midsagittal plane, maxillary arch was fitted separately on each side using clinical crown center points, indices reflecting maxillary arch morphology were measured. Generalized estimating equations (GEEs) and additional statistical analyses were employed to examine the relationship between maxillary arch curvature and its influencing factors.
RESULTS: The gingival-directional intersection angle between the anterior and posterior segments of the maxillary arch in the sagittal plane (AC/PC) was smaller in adolescents (162.42° ± 6.38°) than adults (166.09° ± 6.93°). Differences were also observed among patients with varying degrees of crowding, overjet, and overbite. In GEE analyses accounting for within-subject clustering, age demonstrated a significant positive association with AC/PC (β = 1.781, P < 0.001), whereas the maxillomandibular plane angle (MP/PP) showed a significant negative association (β = -0.902, P < 0.001).
CONCLUSIONS: With increasing age, the sagittal curvature of the maxillary arch tends to flatten, whereas greater curvature is associated with a larger maxillomandibular plane angle (MP/PP). Age and vertical skeletal relationships appear to play key roles in shaping sagittal maxillary arch morphology.
METHODS: A total of 537 pre-treatment cases with cone beam computed tomography (CBCT) and digital dental model were included. CBCT images and dental models were registered and fused to obtain landmark coordinates of the integrated models. On the midsagittal plane, maxillary arch was fitted separately on each side using clinical crown center points, indices reflecting maxillary arch morphology were measured. Generalized estimating equations (GEEs) and additional statistical analyses were employed to examine the relationship between maxillary arch curvature and its influencing factors.
RESULTS: The gingival-directional intersection angle between the anterior and posterior segments of the maxillary arch in the sagittal plane (AC/PC) was smaller in adolescents (162.42° ± 6.38°) than adults (166.09° ± 6.93°). Differences were also observed among patients with varying degrees of crowding, overjet, and overbite. In GEE analyses accounting for within-subject clustering, age demonstrated a significant positive association with AC/PC (β = 1.781, P < 0.001), whereas the maxillomandibular plane angle (MP/PP) showed a significant negative association (β = -0.902, P < 0.001).
CONCLUSIONS: With increasing age, the sagittal curvature of the maxillary arch tends to flatten, whereas greater curvature is associated with a larger maxillomandibular plane angle (MP/PP). Age and vertical skeletal relationships appear to play key roles in shaping sagittal maxillary arch morphology.