Correcting posterior crossbite in adult patients using nonsurgical methods may involve buccolingual tooth movement. Knowing the extent of the pretreatment alveolar bony dehiscences and fenestrations in the posterior area will aid orthodontists in planning posterior crossbite patients accordingly to minimize posttreatment bony defects. Before the advent of cone beam computed tomography (CBCT), observing buccal and lingual bony defects was not possible unless other treatment needs allowed for an open-flap procedure. With CBCT technology, we can now detect posterior defects with some accuracy. The aim of the present study was to determine the prevalence of posterior alveolar bony dehiscence and fenestration in adults with posterior crossbite compared with noncrossbite adults. The study group consisted of pretreatment CBCTs of 28 samples with at least one or more teeth in posterior crossbite or edgebite. The comparison group consisted of pretreatment CBCTs of 28 samples with no posterior crossbite or edgebite. All buccal and lingual sides of the upper and lower posterior segments were measured for the presence of dehiscence, fenestration, and combined total bony defects. The prevalence of total bony defects was higher in the study group (61.6%) than in the comparison group (52.1%) (p < 0.05). While there was no difference in prevalence between crossbite teeth in the study group and noncrossbite teeth in the comparison group, the noncrossbite teeth in the study group showed a higher prevalence of total bony defects, dehiscence, and fenestration than the noncrossbite teeth in the comparison group (p < 0.05). The prevalence of dehiscence was higher in the study group (41.2%) than in the comparison group (33.3%) (p < 0.05). Neither the prevalence of fenestration nor the mean bony defect size showed statistical significance between the two groups. First premolars showed a higher prevalence of dehiscence than other posterior teeth, and maxillary posterior teeth had a higher prevalence of fenestration than mandibular posterior teeth. Among the maxillary posterior teeth, second premolars had the least amount of fenestration. Adult subjects with posterior crossbite had a higher prevalence of total bony defects and dehiscence, especially buccal dehiscence, in the posterior region than subjects with no posterior crossbite. This was due to the high prevalence observed in the noncrossbite teeth in posterior crossbite subjects.

中文翻译：

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CBCT研究显示成年人后交叉咬伤后牙槽骨开裂和开窗的患病率

使用非手术方法矫正成年患者的后牙咬合可能涉及颊舌运动。了解治疗后牙槽骨开裂和开窗的程度将有助于正畸医生相应地计划后牙合患者，以最大程度地减少治疗后的骨缺损。在锥束计算机断层扫描（CBCT）出现之前，除非有其他需要开放瓣手术的治疗方法，否则不可能观察颊和舌骨骨缺损。借助CBCT技术，我们现在可以以一定的精度检测出后牙缺损。本研究的目的是确定与后交叉咬合成人相比，后交叉咬合成人的后牙槽骨开裂和开窗的患病率。该研究组由28个样品的预处理CBCT组成，其中至少一个或多个牙齿在后牙合或后牙合中。对照组由28个样品的预处理CBCT组成，无后牙合或后牙合。测量上下后节段的所有颊侧和舌侧是否存在裂开，开窗和合并的总骨缺损。研究组的总骨缺损患病率（61.6％）高于对照组（52.1％）（p <0.05）。尽管研究组中的cross牙与比较组中的非cross牙的患病率没有差异，但研究组中的非bit牙的总骨缺损，开裂和开窗的患病率高于对照组中的cross牙。 （p ＜0.05）。研究组的开裂患病率（41.2％）高于对照组（33.3％）（p <0.05）。开窗率和平均骨缺损大小在两组之间均无统计学意义。第一前磨牙的裂隙患病率高于其他后牙，而上颌后牙的开窗患病率高于下颌后牙。在上颌后牙中，第二前磨牙的开窗量最少。与没有后牙合咬合的受试者相比，具有后牙合咬合的成年受试者在后方区域的总骨缺损和裂开（尤其是颊裂）的患病率更高。这是由于在后交叉咬合受试者的非交叉咬合牙齿中观察到的高患病率。