Insabralde Natalia Martins, de Almeida Renato Rodrigues, Henriques José Fernando Castanha, Fernandes Thais Maria Freire, Flores-Mir Carlos, de Almeida Marcio Rodrigues
Angle Orthod. 2016 Nov;86(6):969-975. doi: 10.2319/011916-49.1. Epub 2016 May 9.
To evaluate the dentoskeletal effects of different anterior open bite treatment modalities in children.
This cephalometric study assessed changes resulting from different treatment approaches on 77 growing children with anterior open bite. A control group (n = 30) was used for comparison. Lateral cephalograms were available before treatment and after 12 months. The sample was divided into four groups: removable palatal crib associated with a chincup (G1), bonded spurs associated with a chincup (G2), chincup (G3), and nontreated control (G4). Statistical comparisons among the four groups were performed on T1 and the treatment changes using analysis of variance with Tukey's post hoc tests.
No statistically significant changes in skeletal variables were found among the groups, except for lower anterior face height (LAFH) increase in G1. Overall, effects in all of the treated groups were exclusively dentoalveolar. A larger overbite (OB) increase was observed in G1 and G2 when compared with G3 and G4. The maxillary incisors in G1 showed increased palatal tipping, retrusion, and more vertical dentoalveolar development as well as increased lingual tipping among mandibular incisors. There was less vertical development of maxillary and mandibular molars in G3.
A removable palatal crib provided an improvement in OB (97.5%), followed by the bonded spurs (84.5%). Conversely, the chincup-only group did not have positive OB effects.
评估不同的前牙开颌治疗方式对儿童牙颌面的影响。
这项头影测量研究评估了77名正在生长发育的前牙开颌儿童采用不同治疗方法后的变化。设立一个对照组（n = 30）用于比较。在治疗前和治疗12个月后获取头颅侧位片。样本分为四组：可摘式腭托联合颏兜（G1组）、粘结式唇挡联合颏兜（G2组）、颏兜（G3组）和未治疗的对照组（G4组）。对四组在T1时的数据以及治疗变化进行方差分析，并采用Tukey事后检验进行统计学比较。
除G1组下前牙面高度（LAFH）增加外，各组骨骼变量未见统计学显著变化。总体而言，所有治疗组的影响均仅局限于牙槽牙。与G3组和G4组相比，G1组和G2组的覆盖加深（OB）增加更为明显。G1组上颌切牙腭向倾斜、后缩增加，牙槽牙垂直向发育更多，下颌切牙舌向倾斜增加。G3组上颌和下颌磨牙的垂直向发育较少。
可摘式腭托使覆盖加深改善率达97.5%，其次是粘结式唇挡（84.5%）。相反，单纯颏兜组对覆盖加深没有积极影响。
