Assessment of the relationship between the maxillary molars and adjacent structures using cone beam computed tomography.
Assessment of the relationship between the maxillary molars and adjacent structures using cone beam computed tomography.
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DOI：
10.5624/isd.2012.42.4.219
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发表时间：
2012-12
影响因子：
1.8
通讯作者：
Cho BH
中科院分区：
文献类型：
--
作者：
Jung YH;Cho BH
本研究利用锥束ct （cone beam computed tomography， CBCT）研究上颌磨牙牙根与上颌窦的关系，测量上颌磨牙牙根与窦底的距离以及牙根与牙槽皮质板之间的骨厚度。研究对象为83例双侧上颌第一、第二磨牙正常出牙的患者。采用CBCT检查332颗上颌磨牙。在CBCT横断面图像上将各根与上颌窦的垂直关系分为四种类型。测量窦底与牙根的距离及牙根与牙槽皮质板的骨厚度。在上颌磨牙的颊根中，最常见的是突出到窦内的根。上颌第一磨牙腭根沿窦腔外侧突出最为常见。上颌第二磨牙的中颊根最靠近鼻窦。第一磨牙的中颊根最靠近皮质板。上颌磨牙根与颌窦的关系在颊根和腭根之间存在差异。上颌磨牙的颊根较常突出于窦内。上颌第二磨牙的中颊根离上颌窦底最近，离牙槽皮质板最远。
This study investigated the relationship between the roots of the maxillary molars and the maxillary sinus using cone beam computed tomography (CBCT), and measured the distances between the roots of the maxillary molars and the sinus floor as well as the thickness of the bone between the root and the alveolar cortical plate. The study sample consisted of 83 patients with normally erupted bilateral maxillary first and second molars. A total of 332 maxillary molars were examined using CBCT images. The vertical relationship of each root with the maxillary sinus was classified into four types on CBCT cross-sectional images. The distance between the sinus floor and root and the bone thickness between the root and alveolar cortical plate were measured. In the buccal roots of the maxillary molars, a root protruding into the sinus occurred most frequently. A root projecting laterally along the sinus cavity was most common in the palatal roots of the maxillary first molars. The mesiobuccal roots of the maxillary second molar were closest to the sinus. The mesiobuccal roots of the first molars were closest to the cortical plate. The relationship between the roots of the maxillary molars and the sinus differed between the buccal and palatal roots. A root protruding into the sinus occurred more frequent in the buccal roots of the maxillary molars. The mesiobuccal root of the maxillary second molar was closest to the maxillary sinus floor and farthest from the alveolar cortical plate.