Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, Department of Orthodontics, College of Stomatology, Xi'an Jiaotong University, 98 Xi Wu Road, Xi'an, Shaanxi, 710004, People's Republic of China.
BMC Pediatr. 2022 Aug 25;22(1):506. doi: 10.1186/s12887-022-03559-w.
This study aimed to examine the clinical effects of myofunctional treatment on children with functional mouth breathing by cephalometric radiographs and study models.
A total of 224 children (6-10 years old; 114 males and 110 females; SNA°: 82.24 ± 1.67°; ANB°: 2.79 ± 0.80°, 28° < SN-GoGn° < 37°) formed three groups: MB-M group (mouth breathers with myofunctional treatment,n = 75); MB-N group (mouth breathers with no treatment,n = 70); NB group (nasal breathers with no treatment, n = 79). A blind evaluation of cephalometric radiographs and study models was conducted at T1(pre-study) and T2 (post-study), respectively.
Two hundred four children (MB-M:66, MB-N:68, NB:70) completed the present study. At T1, MB-M and MB-N groups, compared to their NB counterpart, had greater anterior lower facial height(P < 0.01) and overjet(P < 0.001) but shorter overbite and maxillary canines width (P < 0.001). At T2, the MB-N group exhibited a higher ANB angle, anterior lower facial height, and overjet, but shorter overbite and maxillary canines width (P < 0.001). From T1 to T2, the anterior lower facial height increased, overbite and the maxillary canines width further decreased in the MB-N group (P < 0.001). However, in the MB-M group, the incisors were retracted, overbite increased (P < 0.001), anterior lower facial height increased insignificantly (P > 0.05), and maxillary canines width increased slightly (P < 0.05). In the NB and MB-M groups, the mandible showed a normal tendency to grow forward, whereas, in the MB-N group, the mandible showed a tendency to grow downward (P < 0.001).
Mouth breathers demonstrated increased anterior facial height and overjet but reduced overbite and maxillary arch width, which improved significantly following myofunctional treatment.
TCTR: TCTR20220401001 . Registered 1April 2022-Retrospectively registered.
本研究旨在通过头颅侧位片和研究模型检查肌功能治疗对功能性口呼吸儿童的临床效果。
共纳入 224 名儿童（6-10 岁；男 114 名，女 110 名；SNA°：82.24±1.67°；ANB°：2.79±0.80°，28°<SN-GoGn°<37°），分为三组：MB-M 组（口呼吸伴肌功能治疗，n=75）；MB-N 组（口呼吸未治疗，n=70）；NB 组（鼻呼吸未治疗，n=79）。分别在 T1（研究前）和 T2（研究后）对头颅侧位片和研究模型进行盲法评估。
204 名儿童（MB-M：66 名，MB-N：68 名，NB：70 名）完成了本研究。在 T1 时，与 NB 组相比，MB-M 组和 MB-N 组的上前牙区牙槽骨高度更大（P<0.01）和覆颌更大（P<0.001），但覆颌更小和上颌尖牙宽度更小（P<0.001）。在 T2 时，MB-N 组的 ANB 角、上前牙区牙槽骨高度和覆颌更大，但覆颌和上颌尖牙宽度更小（P<0.001）。从 T1 到 T2，MB-N 组的上前牙区牙槽骨高度增加，覆颌和上颌尖牙宽度进一步减小（P<0.001）。然而，在 MB-M 组，切牙后退，覆颌增加（P<0.001），上前牙区牙槽骨高度增加不显著（P>0.05），上颌尖牙宽度略有增加（P<0.05）。在 NB 组和 MB-M 组中，下颌表现出向前生长的正常趋势，而在 MB-N 组中，下颌表现出向下生长的趋势（P<0.001）。
口呼吸儿童的前牙区高度和覆颌增加，但覆颌和上颌弓宽度减小，肌功能治疗后显著改善。
TCTR：TCTR20220401001。2022 年 4 月 1 日注册-回顾性注册。
