Evaluation of transversal slice imaging in the diagnosis of tooth displacement with special consideration of the upper canines; [Evaluierung transversaler Schichtaufnahmen zur Diagnostik von Zahnverlagerungen unter besonderer Berücksichtigung oberer Eckzähne]

被引：9

作者：

Broer N. ^{[1
,3
]}

Fuhrmann A. ^{[2
]}

Bremert S. ^{[1
]}

Schulze D. ^{[2
]}

Kahl-Nieke B. ^{[1
]}

机构：

[1] Department of Orthodontics, University Hospital, Hamburg-Eppendorf

[2] Dept. of Radiological Diagnostics, University Hospital, Hamburg-Eppendorf

[3] 20251 Hamburg

来源：

Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | 2005年 / 66卷 / 2期

关键词：

Computer tomography; Impacted canines; Panoramic imaging technique; Transversal slice imaging;

D O I：

10.1007/s00056-005-0418-3

中图分类号：

学科分类号：

摘要：

Aim: The exact localization and analysis of displaced, retained or impacted teeth can rarely be achieved by common radiologic methods providing eccentric or occlusal images. The aim of this study was to evaluate transversal slice imaging (TSI) as a diagnostic alternative, keeping radiation exposure under consideration. Material and Methods: In a pilot study, we simulated seven different canine positions in a phantom head. Each tooth position was visualized by transversal slice imaging and compared by several observers independently and blinded to computer tomography (CT) serving as the gold standard. The clinical study included the retrospective analysis of TSI sample s from 27 patients (mean age 13.7 yrs.) according to these criteria: 1. location of the canine crown and root, 2. recognition of the crown, 3. stage of root development, 4. root dilaceration, 5. periodontal ligament space, 6. ankylosis, 7. relationship to neighboring teeth, and 8. resorptions of neighboring teeth. The evaluations of canine position were compared to the results gained intraoperatively. Results: In the transversal slice images taken from a phantom head, the observers' estimations of the canine position were identical in five cases (71.4%). At least four observers using TSI described identical tooth positions in 89% of patients. In 2.5%, no statement concerning tooth position was feasible. Crown recognition was possible in 75% of cases. Ankylosis, periodontal ligament space, root development, dilacerations and resorptions were not assessable in the majority of the cases. Conclusion: Transversal slice imaging can be recommended as a second plane projection in diagnosing tooth displacement, especially concerning oro-vestibular localization (effective radiation dose 0.003-0.012 mSv). However, as far as periodontal ligament space, resorptions and root morphology are concerned, this method has its limits. © Urban & Vogel München 2005.

引用

页码：94 / 109

页数：15

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