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Miniplate implant anchorage for maxillary protraction in Class Ⅲ malocclusion
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF STOMATOLOGY
- Issue:
- 5
- DOI:
- 10.3760/j.issn:1002-0098.2007.05.002
- Key Word:
- 错(牙合),安氏Ⅲ类;正畸学,矫正;钛板种植体;前方牵引
Abstract： 目的 探讨利用钛板种植体支抗前方牵引治疗骨性安氏Ⅲ类上颌后缩畸形的效果.方法 8例以上颌后缩为主的骨性安氏Ⅲ类错(牙合)畸形患者,男性4例,女性4例,11～14岁.于上颌侧切牙和尖牙间唇侧植入钛板种植体,1个月后开始前方牵引治疗,对牵引前后头颅侧位X线片的21项测量项目进行分析,对测量结果进行配对t检验.结果 SNA角、ANB角、Wits值、NA-PA角、Max-Lth、A-NP距在牵引治疗后均增大,与治疗前相比差异有统计学意义(P＜0.01);ANS-Me距、Is-FHp距、Ms-FHp距、A-FHp距均增大,与治疗前相比差异有统计学意义(P＜0.05);L1-AP距、OJ、AB-NP角在牵引治疗后均减小,与治疗前相比差异有统计学意义(前1项P＜0.05,后2项P＜0.01);SNB角、MP-SN角、PP-SN角、Ul-PP角、U1-SN角、U1-AP角、L1-MP角、ANS-Me/N-Me比值治疗前后差异均无统计学意义(P＞0.05).结论 钛板种植体支抗能前方牵引上颌骨并有效促进上颌骨向前生长,是稳定可靠的骨性支抗.
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