Angle Orthod. 2022 Jul 1;92(4):487-496. doi: 10.2319/082321-659.1.
To evaluate the dental arch changes produced by the miniscrew-supported palatal crib (MSPC) and the conventional fixed palatal crib (CFPC) after the treatment of patients with anterior open bite (AOB) attributed to the tongue-thrusting habit in the mixed dentition stage.
A total of 26 children aged 8 to 11 years with an AOB were randomly distributed into two equal groups; the MSPC group was treated using a palatal crib supported by two miniscrews inserted paramedially, whereas the CFPC group was treated using a conventional fixed palatal crib soldered to bands. Digital models were obtained pretreatment and after a follow-up duration of 9 months.
The MSPC group included 12 participants (9 girls and 3 boys; mean age, 9.4 ± 0.75 years), and the CFPC group included 12 participants (10 girls and 2 boys; mean age, 9.0 ± 0.73 years). The amount of AOB closure was similar in both groups: 3.97 ± 1.44 mm in the MSPC group and 3.97 ± 0.89 mm in the CFPC group. There was significant mesial movement of the maxillary first molar in the CFPC (-1.42 ± 0.99 mm) compared with the MSPC group (-0.53 ± 0.32 mm).
Both appliances resulted in similar improvement in the amount of AOB closure. There was significantly more mesial movement of the maxillary first molars in the CFPC group compared with the MSPC group.
评估微螺钉支抗腭托（MSPC）和传统固定腭托（CFPC）在治疗混合牙列期因舌前伸习惯导致的前牙开颌（AOB）患者中的牙弓变化。
共有 26 名 8 至 11 岁的 AOB 儿童被随机分为两组；MSPC 组使用双侧微螺钉支抗的腭托治疗，而 CFPC 组使用焊接到带环上的传统固定腭托治疗。在治疗前和 9 个月的随访后获得数字模型。
MSPC 组包括 12 名参与者（9 名女孩和 3 名男孩；平均年龄 9.4 ± 0.75 岁），CFPC 组包括 12 名参与者（10 名女孩和 2 名男孩；平均年龄 9.0 ± 0.73 岁）。两组的 AOB 关闭量相似：MSPC 组为 3.97 ± 1.44mm，CFPC 组为 3.97 ± 0.89mm。与 MSPC 组（-0.53 ± 0.32mm）相比，CFPC 组上颌第一磨牙的近中移动明显更大（-1.42 ± 0.99mm）。
两种矫治器都能使 AOB 的关闭量得到相似的改善。与 MSPC 组相比，CFPC 组上颌第一磨牙的近中移动明显更大。
