Universidade de São Paulo, Hospital de Reabilitação de Anomalias Craniofaciais (Bauru/SP, Brazil).
Universidade de São Paulo, Faculdade de Odontologia de Bauru (Bauru/SP, Brazil).
Dental Press J Orthod. 2023 Apr 14;28(1):e2321331. doi: 10.1590/2177-6709.28.1.e2321331.oar. eCollection 2023.
To compare dental positional and gingival parameters of maxillary anterior teeth in unilateral cleft lip and palate (UCLP) after orthodontic treatment with canine substitution due to lateral incisor agenesis.
This split-mouth study comprised 57 subjects with UCLP (31 male, 26 female) and agenesis of maxillary lateral incisor at the cleft side, from a single center. Canine substitution was completed after the secondary alveolar bone graft. Dental models were taken between 2 to 6 months after debonding (mean age: 20.4 years). The following variables were measured in the maxillary anterior teeth: crown height, width, proportion, and symmetry, as well as steps between incisal edges, gingival margins, tooth mesiodistal angulation and labiolingual inclination. Paired t-tests with Bonferroni post-hoc correction was used for comparisons between cleft and non-cleft sides (p<0.05).
At the cleft side, canines replacing missing lateral incisors had a higher crown height (0.77mm) and an increased width (0.67mm), and first premolars showed a shorter crown height (1.39mm). Asymmetries were observed in the gingival level of central and lateral incisors, with a greater clinical crown at the cleft side (0.61 and 0.81mm, respectively). Cleft side central incisors were more upright than their contralaterals (2.12º).
Maxillary anterior teeth demonstrated positional, size and gingival height differences between cleft and non-cleft side after space closure of maxillary lateral incisor agenesis. Slight asymmetries in tooth position and gingival margin in the maxillary anterior teeth should be expected after orthodontic treatment in UCLP patients.
比较单侧唇腭裂（UCLP）患者上颌侧切牙缺失后行尖牙替代治疗后的牙位和牙龈参数。
本研究为一项单中心的分侧研究，共纳入 57 例单侧唇腭裂患者（男 31 例，女 26 例），腭裂侧上颌侧切牙缺失。尖牙替代治疗在二期牙槽骨植骨术后完成。拆除矫治器后 2 至 6 个月（平均年龄：20.4 岁）取牙模。测量上颌前牙的以下变量：牙冠高度、宽度、比例和对称性，以及切缘间台阶、牙龈边缘、牙近远中向倾斜度和唇舌向倾斜度。使用配对 t 检验和 Bonferroni 事后校正进行裂侧和非裂侧之间的比较（p<0.05）。
在裂侧，替代缺失侧切牙的尖牙牙冠高度较高（0.77mm），宽度较宽（0.67mm），而第一前磨牙牙冠高度较短（1.39mm）。中切牙和侧切牙的牙龈水平存在不对称，裂侧的临床牙冠较大（分别为 0.61 和 0.81mm）。裂侧中切牙较对侧更直立（2.12°）。
上颌侧切牙缺失后行尖牙替代治疗后，上颌前牙在牙位、大小和牙龈高度上存在裂侧和非裂侧差异。UCLP 患者正畸治疗后，上颌前牙的牙位和牙龈边缘可能会出现轻微的不对称。
