Faber Jorge, Berto Patrícia Medeiros, Quaresma Marcelo
Am J Orthod Dentofacial Orthop. 2006 Apr;129(4):583-9. doi: 10.1016/j.ajodo.2005.12.015.
Treating an impacted maxillary canine requires identifying its exact position; this can pose a challenge to both orthodontists and oral surgeons. The purpose of this article is to present a new method for diagnosis and treatment planning of maxillary canine impaction by using computed tomography combined with rapid prototyping. Computed tomography image files of a patient with tooth 13 impaction were edited to produce, by means of rapid prototyping, an anatomic model of the maxillary teeth and a single attachment model that was later used to fabricate a metal attachment to be bonded to the impacted tooth. The dental model was used in the diagnosis and orthodontic treatment planning, and to communicate with the patient and his parents. The model showed the exact anatomical relationship between the impacted tooth and the other teeth; it was the main aid in intraoperative navigation during surgery to expose the tooth. The metal attachment built from the prototype was bonded to tooth 13 during surgery. Prototyping could become a new tool for fabricating brackets and other precision accessories for specific needs. Dental models made with rapid prototyping could become the diagnostic procedure of choice for evaluating impacted maxillary canines.
治疗埋伏阻生的上颌尖牙需要确定其确切位置；这对正畸医生和口腔外科医生来说都是一项挑战。本文的目的是介绍一种通过计算机断层扫描结合快速成型技术对上颌尖牙阻生进行诊断和治疗计划的新方法。对一名13号牙阻生患者的计算机断层扫描图像文件进行编辑，通过快速成型技术制作上颌牙齿的解剖模型和单个附着模型，该附着模型随后用于制作要粘结到阻生牙上的金属附件。牙齿模型用于诊断和正畸治疗计划，并与患者及其父母进行沟通。该模型显示了阻生牙与其他牙齿之间的确切解剖关系；它是手术中暴露牙齿时术中导航的主要辅助工具。由原型制作的金属附件在手术期间粘结到13号牙上。快速成型技术可以成为制造特定需求的托槽和其他精密附件的新工具。用快速成型技术制作的牙齿模型可能会成为评估埋伏阻生上颌尖牙的首选诊断方法。
