摘要
背景:在牙移动过程中牙槽骨的改建不仅受正畸加力方式和唇舌肌平衡的影响,同时还受到牙槽骨形态的限制。目的:对青少年骨性Ⅱ类错牙合不同垂直骨面型患者切牙区牙槽骨形态特征进行初步分析。方法:选取60例年龄在11-16岁骨性Ⅱ类错牙合患者,分为3组:1高角组:前颅底-下颌平面角>40°,眶耳平面-下颌平面角>32°。2低角组:前颅底-下颌平面角<29°,眶耳平面-下颌平面角<22°。3均角组:前颅底-下颌平面角≥29°,≤40,眶耳平面-下颌平面角≥22°,≤32°。每组各20例,均拍摄头颅定位侧位片并测量上下前牙区牙槽骨厚度和高度的相应指标,利用SPSS 17.0统计软件对测量结果进行比较分析。结果与结论:1根尖牙槽骨厚度:UBP值(U平面相较于上前牙唇侧骨皮质于一点,此点与根尖点距离)、LBP值(L平面相较于下前牙唇侧骨皮质于一点,此点与根尖点距离)及根尖区牙槽骨总厚度3组之间差异、及组间两两比较差异均有显著性意义(P<0.05);ULP值(U平面相较于上前牙腭侧骨皮质于一点,此点与根尖点距离)、LLP值(L平面相较于下前牙舌侧骨皮质于一点,此点与根尖点距离)在高角组与低角组间差异有显著性意义(P<0.05)。2牙槽骨高度:UBH值(上前牙唇侧牙槽嵴顶到U平面垂直距离,为唇侧牙槽骨高度)、ULH值(上前牙腭侧牙槽嵴顶到U平面垂直距离,为腭侧牙槽骨高度)、LBH值(下前牙唇侧牙槽嵴顶到L平面垂直距离,为唇侧牙槽骨高度)、LLH值(下前牙唇侧牙槽嵴顶到L平面垂直距离,为舌侧牙槽骨高度)在3组之间差异有显著性意义(P<0.05)。结果表明,青少年骨性Ⅱ类错牙合高角型患者唇侧切牙区牙槽骨厚度较薄,提示在内收过程要防止骨开窗、骨开裂的发生,低角型患者唇侧牙槽骨较厚,前牙内收范围较大。
BACKGROUND：In the process of tooth movement, alveolar bone remodeling process is not only influenced by orthodontic force approach and balance between lip and tongue, but also limited by alveolar bone morphology.
OBJECTIVE：To preliminarily study the morphological characteristics of the incisive alveolar bone in adolescent with skeletal class II malocclusion of different vertical facial skeletal types.
METHODS：Sixty patients with class II malocclusion, aged 11-16 years, were divided into three groups：（1） high-angle group：the angle between the anterior skul base and mandibular plane was〉40°, and the angle between the orbitomeatal plane and mandibular plane angle was＆gt;32°. （2） Low-angle group：the angle between the anterior skul base and mandibular plane was〈29°, and the angle between the orbitomeatal plane and mandibular plane angle was〈22°. （3） Average angle group：the angle between the anterior skul base and mandibular plane was≥29°,≤40°, and the angle between the orbitomeatal plane and mandibular plane angle was≥ 22°,≤ 32°. Each group included 20 subjects. Cephalometric films were taken and measured to analyze the morphological characteristics of the incisive alveolar bone with SPSS 17.0.
RESULTS AND CONCLUSION：（1） The thickness of the apical alveolar：the UBP, LBP value and the total＆amp;nbsp;thickness of the apical alveolar were significantly different between the three groups （P〈0.05）. The ULP and LLP values were significant different between the high-angle and low-angle groups （P〈0.05）. （2） The alveolar height：the UBH, ULH, LBH, and LLH values showed significant differences among the three groups （P〈0.05）. These findings indicate that the thickness of the labial alveolar bone of the incisor is obviously thinner in the high-angle malocclusion than others, indicating it is very important to prevent the fenestration and bone cracking. The labial alveolar bone of the low-angle malocclusion is thicker, and therefore, the adduction range of the anterior teeth is wider.
出处
《中国组织工程研究》
CAS
北大核心
2015年第7期1018-1022,共5页
Chinese Journal of Tissue Engineering Research
