Retrospective comparison of two different miniscrew-supported molar distalization methods applied in the buccal and palatal regions

IF 2.6 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of the World Federation of Orthodontists Pub Date : 2024-06-01 DOI:10.1016/j.ejwf.2024.01.006

Yavuz Selim Aslan, Mehmet Ali Yavan, Nihal Hamamci

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Abstract

Background

To compare dentofacial effects of distalization with miniscrew-supported pendulum and infrazygomatic crest miniscrews.

Methods

The study included 36 patients whose lateral cephalometric radiographs were obtained before (T0) and after (T1) distalization. Patients were divided into two groups according to the treatment methods: 1) distalization with miniscrew-supported pendulum (MSP) (n = 19; 14 girls and 5 boys; mean age 16.9 ± 1.46 years) and 2) distalization with infrazygomatic crest (IZC) miniscrews (n = 17; 8 girls and 9 boys; mean age 17.0 ± 1.68 years). Dental, skeletal and soft tissue measurements were performed on lateral cephalograms taken from individuals.

Results

A significant molar distalization was achieved both in the MSP group (3.52 ± 0.76 mm at 8.71 ± 2.02 months) and the IZC group (3.5 ± 0.74 mm at 9.7 ± 2.5 months) (P < 0.001 for both). Premolar distalization was significantly lower in the MSP group (1.73 ± 1.09 mm) than in the IZC group (2.81 ± 0.79 mm) (P < 0.01). Significant molar tipping was observed in both groups (P < 0.001), while no significant difference was found between the groups (P > 0.05). Retrusion of maxillary incisors were significantly higher in the IZC group (2.75 mm) than in the MSP group (0.98 mm) (P < 0.01). A significant difference was found between the two groups with regard to the changes in overjet and overbite (P < 0.05).

Conclusions

Both distalization methods were found to be effective in achieving a Class I molar relationship in patients with Class II malocclusion.

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两种不同的微型螺钉支撑臼齿远端矫治方法在颊和腭区应用的回顾性比较。

背景：比较微型螺钉支撑的摆锤式和颧嵴下微型螺钉的牙面远端化效果：比较使用微型螺钉支撑的摆锤式和颧嵴下微型螺钉进行远端矫治的颌面效果：研究包括 36 名患者，他们的头颅侧位X光片分别在矫治前（T0）和矫治后（T1）拍摄。根据治疗方法将患者分为两组：1）用微型螺钉支撑摆锤（MSP）进行远端矫治（n = 19；14 名女孩和 5 名男孩；平均年龄为 16.9 ± 1.46 岁）；2）用颧下嵴（IZC）微型螺钉进行远端矫治（n = 17；8 名女孩和 9 名男孩；平均年龄为 17.0 ± 1.68 岁）。对每个人的头颅侧位片进行了牙齿、骨骼和软组织测量：MSP组（8.71±2.02个月时为3.52±0.76毫米）和IZC组（9.7±2.5个月时为3.5±0.74毫米）的臼齿远化均有明显改善（P < 0.001）。MSP 组（1.73 ± 1.09 mm）的前磨牙远端化明显低于 IZC 组（2.81 ± 0.79 mm）（P < 0.01）。两组中均观察到明显的臼齿倾倒（P < 0.001），而组间无明显差异（P > 0.05）。IZC 组的上颌切牙后缩（2.75 毫米）明显高于 MSP 组（0.98 毫米）（P < 0.01）。两组在过咬合和过咬合的变化方面存在明显差异（P < 0.05）：结论：两种远端矫治方法都能有效地使Ⅱ类错颌畸形患者获得Ⅰ类臼齿关系。

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来源期刊

Journal of the World Federation of Orthodontists DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.80

自引率

4.80%

发文量