提取与脱离对第二类异常局限性大第三的效果的评估:一项回顾性研究
Amira A Aboalnaga1, Ahmed S Fouda2
1Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Cairo University, 11 EL-Saraya St. Manial, Cairo, Egypt.
Clinical oral investigations
|March 3, 2024
概括
在II类患者中,前抽取显著改善了上第三的角度和垂直位置,而非静止. 这凸显了在正牙治疗规划中考虑第三牙的重要性.
科学领域:
- 矯正牙科 矯正牙科是一種矯正牙科.
- 牙科成像 牙科成像 牙科成像
- 部面部发育 部面部发育
背景情况:
- 二级缺陷症带来了复杂的治疗挑战.
- 大的第三 (MxM3) 可以影响正的结果.
- 了解MxM3对不同治疗方式的反应至关重要.
研究的目的:
- 为了比较第一个前提取与脱离在MxM3垂直位置和 mesiodistal角的效果.
- 为了评估青少年II类患者的治疗结果.
主要方法:
- 对200名II类青少年患者的全景X射线 (OPG) 的回顾性分析.
- 两个组:脱离 (48 MxM3s) 和提取 (50 MxM3s).
- 对MxM2和MxM3角变化分析了治疗前和治疗后的OPG.
主要成果:
- 提取组显示MxM2和MxM3角度 (-10.5°和-11°直立) 的显著下降.
- 不稳定组在MxM2和MxM3角度 (-2.4°和 -4.5°直立) 没有显著下降.
- 在提取组中,MxM3角和垂直位置显著改善 (P < .001).
结论:
- 第一个前牙的提取导致明显的直立和改善了上第三牙的闭合位置.
- 脱节导致上第三的变化不那么有利.
- 对于II类恶性闭塞的正牙治疗计划,应考虑到大第三的发育和定位.
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