Abstract：
Canine impaction is a common dental anomaly that requires a multidisciplinary approach, from diagnosis to treatment. The regular two-dimensional (2D) radiographs are able to visualize if the tooth is impacted, but unable to specifically localize it, and determine if there are any root resorptions associated to it. The cone-beam computed tomography (CBCT) is able to three-dimensionally determine its location, aiding to the diagnosis and treatment plan. The major disadvantage is the amount of radiation that is added to the patient and can be even more significant in pediatric patients. The intra-oral ultrasound (io-US) is a new non-invasive and non-radiating real-time chairside imaging method that has the potential to aid in locating the impacted tooth. This paper presents 4 cases that required a CBCT for the location and treatment planning of impacted maxillary canines and were also scanned with intra-oral ultrasound. The images were then compared to the CBCT exam for validation of the new method. Through these cases, we highlight the capability of the io-US to locate the impacted canines. Other advantages of io-US might include evaluation of soft tissue thickness and vasculature that are important for surgical planning and execution.
摘要：
犬类嵌塞是一种常见的牙齿异常，需要多学科的方法，从诊断到治疗。常规的二维（2D）射线照片能够可视化牙齿是否受到撞击，但无法具体定位它，并确定是否有任何与之相关的根吸收。锥形束计算机断层扫描（CBCT）能够三维确定其位置，协助诊断和治疗计划。主要缺点是被添加到患者的辐射量,并且在儿科患者中可能甚至更显著。口腔内超声（io-US）是一种新的非侵入性和非辐射实时椅旁成像方法，有可能帮助定位受影响的牙齿。本文介绍了4例需要CBCT来定位和治疗上颌受累犬的情况，并且还进行了口腔超声扫描。然后将图像与CBCT检查进行比较，以验证新方法。通过这些案例,我们强调了io-US定位受影响犬科动物的能力。io-US的其他优点可能包括对手术计划和执行重要的软组织厚度和脉管系统的评估。
