Tavares Alana, Crusoé-Rebello Iêda-Margarida, Neves Frederico-Sampaio
PhD student in odontology and health - school of dentistry, federal university of Bahia.
Associated professor - school of dentistry, federal university of Bahia, division of oral radiology.
J Clin Exp Dent. 2020 Nov 1;12(11):e1015-e1020. doi: 10.4317/jced.57267. eCollection 2020 Nov.
Analysis of the anatomy of the region during preoperative planning is very important in order to minimize the risks of undesired movements in the supporting teeth or even damage to important structures such as the maxillary sinus. To the best of our knowledge, no study evaluated the relationship of these skeletal patterns with the anatomy of the infrazygomatic crest. The aim of this study was to evaluate the tomographic measurements of the infrazygomatic crest for placement of temporary anchorage devices in individuals with different vertical and sagittal skeletal patterns.
The measurements were analyzed in three regions in the crest of 67 patients above the maxillary first molar: A slice in the long axis of the mesiobuccal root, a slice passing through the center of the furcation area of the tooth, and another slice in the long axis of the distobuccal root. In each of these slices five measurements of the thickness of the infrazygomatic crest were performed, with a difference of 1 mm between them. The sagittal skeletal pattern was determined by the ANB angle and the vertical skeletal pattern by the SN.GoGn angle.
The bone thickness of the crest tended to decrease gradually in the apical direction. There was no difference between different vertical and sagittal skeletal patterns.
The individual parameters did not have significant influence in the thickness of the infrazygomatic crest. Tomography, X-Ray Computed, orthodontics, mini-implant, infrazygomatic crest, maxilla.
在术前规划过程中分析该区域的解剖结构对于将支持牙出现意外移动甚至对上颌窦等重要结构造成损伤的风险降至最低非常重要。据我们所知，尚无研究评估这些骨骼模式与颧下嵴解剖结构之间的关系。本研究的目的是评估颧下嵴的断层测量结果，以便在具有不同垂直和矢状骨骼模式的个体中放置临时锚固装置。
对67例上颌第一磨牙上方患者的颧下嵴三个区域进行测量分析：近中颊根长轴切片、穿过牙分叉区中心的切片以及远中颊根长轴切片。在每个切片中对颧下嵴厚度进行5次测量，每次测量相差1毫米。矢状骨骼模式由ANB角确定，垂直骨骼模式由SN.GoGn角确定。
嵴的骨厚度在根尖方向上倾向于逐渐减小。不同垂直和矢状骨骼模式之间没有差异。
个体参数对颧下嵴厚度没有显著影响。断层扫描、X线计算机体层摄影、正畸学、微型种植体、颧下嵴、上颌骨。
