Shokri Abbas, Lari Sima, Yousef Faezeh, Hashemi Laya
Assistant Professor, Department of Oral and Maxillofacial Radiology, Hamedan University of Medical Sciences, Hamadan, Iran.
Dentist, Department of Oral and Maxillofacial Radiology, Hamedan University of Medical Sciences, Hamadan, Iran.
J Contemp Dent Pract. 2014 Sep 1;15(5):618-22. doi: 10.5005/jp-journals-10024-1589.
This study was conducted to assess the vertical and horizontal relationship between the maxillary sinus floor and maxillary posterior teeth roots using cone beam computed tomography.
In this cross-sectional study, the CBCT images presented in the radiology department of Hamadan dental school was used. From 450 observed CBCT, 340 of them did not have the inclusion criteria of the study and ultimately 110 CBCT were selected. Totally 214 first premolars, 217 second premolars, 220 first molars and 220 second molars were included. For evaluating the relationship between the maxillary sinus floor and the posterior maxillary teeth, the classification implemented in the study of Jung in 2009 was used. The relation was evaluated by two radiologists twice with a 2-week time interval.
One hundred and ten patients with a mean age of 31.06 ± 9.7 years were assessed. Type 0 relationship (the maxillary sinus floor is located above the root tip) was most frequently observed with the first and second premolars. The most common type observed in the first and second molars was type 3 (apical protrusion is seen over the maxillary sinus floor). The relation between different types and gender was statistically meaningful, while no statistically significant difference was found between the right and left side assessments.
This study showed that although most of the teeth did not have contact with the sinus floor, but the more posterior the maxillary teeth, the more probability for root protruding into the maxillary sinus. It also confirmed that protrusion of teeth roots into the maxillary sinus is more common in male than female.
Knowing the anatomical relation between the posterior teeth and the maxillary sinus, help the clinician in preoperative treatment planning of the posterior maxillary teeth and avoid problems that may occur during dental practice.
本研究旨在使用锥形束计算机断层扫描评估上颌窦底与上颌后牙牙根之间的垂直和水平关系。
在这项横断面研究中,使用了哈马丹牙科学院放射科提供的CBCT图像。在450例观察到的CBCT中,有340例不符合研究纳入标准,最终选择了110例CBCT。共纳入214颗第一前磨牙、217颗第二前磨牙、220颗第一磨牙和220颗第二磨牙。为评估上颌窦底与上颌后牙的关系,采用了2009年Jung研究中实施的分类方法。由两名放射科医生进行两次评估,时间间隔为2周。
评估了110例平均年龄为31.06±9.7岁的患者。0型关系(上颌窦底位于根尖上方)在第一和第二前磨牙中最常观察到。在第一和第二磨牙中最常见的类型是3型(根尖突出至上颌窦底上方)。不同类型与性别的关系具有统计学意义,而左右侧评估之间未发现统计学显著差异。
本研究表明,虽然大多数牙齿与窦底无接触,但上颌牙齿越靠后,牙根突入上颌窦的可能性越大。还证实牙根突入上颌窦在男性中比女性更常见。
了解后牙与上颌窦之间的解剖关系,有助于临床医生对上颌后牙进行术前治疗规划,并避免牙科实践中可能出现的问题。