Yatabe Marilia, Kripfgans Oliver, Chan Hsun-Liang, Xu Jennifer, Cook Jade, Soki Fabiana
Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI, USA.
Department of Radiology, University of Michigan, Michigan Medicine, Ann Arbor, MI, USA.
Oral Radiol. 2025 Jan;41(1):131-143. doi: 10.1007/s11282-024-00769-z. Epub 2024 Aug 10.
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.
犬牙阻生是一种常见的牙齿异常情况，从诊断到治疗都需要多学科方法。常规的二维（2D）X线片能够显示牙齿是否阻生，但无法准确确定其位置，也无法判断是否存在与之相关的牙根吸收情况。锥形束计算机断层扫描（CBCT）能够三维确定其位置，有助于诊断和治疗计划制定。主要缺点是会增加患者所接受的辐射量，这在儿科患者中可能更为显著。口腔内超声（io-US）是一种新的非侵入性、无辐射的实时椅旁成像方法，有潜力辅助定位阻生牙。本文介绍了4例上颌阻生犬牙的定位和治疗计划需要CBCT检查且同时进行口腔内超声扫描的病例。然后将这些图像与CBCT检查结果进行比较，以验证这种新方法。通过这些病例，我们突出了io-US定位阻生犬牙的能力。io-US的其他优点可能包括评估软组织厚度和血管情况，这对手术规划和实施很重要。
