螺旋CT颌骨多层面重建图象及其用于牙种植的临床评价

Multiplanar Reconstruction of Spiral CT for Jaw Examination and Clinical Evaluation when Used in Dental Implantation

目的】应用两种螺旋CT多层面图象重建(MPR)技术检查颌骨,考察这些图象用于牙种植所达到的临床效果。【方法】用螺旋CT对牙种植术前术后的临床病例之颌骨作1mm厚层连续扫描后,CT主机将扫描图象数据传送入工作站,以牙科颌骨多区域MPR软件,和普通颌骨单区域MPR软件处理数据。【结果】多区域MPR技术可同时显示数张整体颌骨弓的CT全景片和数十张任意间隔的颌骨弓多区域横断面图象。普通颌骨单区域MPR技术可显示颌骨单区域数张任意平面和任意曲面的图象。【结论】两种螺旋CTMPR分别适用于牙种植术前设计的颌骨检查,和植入后牙种植体的检查。两种技术的联合应用可较全面检查牙种植术前术后的颌骨形态、结构和骨质、牙种植体与骨结合情况。

Objective Two multiplanar reconstruction (MPR) techniques of spiral CT were applied to examine the jaws, and their clinical effects of these CT images were evaluated in dental implantation. Methods Spiral CT scans to jaws of dental implantation cases were made. The scan data were processed by two software: dental multiple area MPR software and routine single area MPR software. Results Multiple area MPR can at the same time show several jaw panoramas and tens of cross section images of whole jaw arch,which can be separated at any intervals. Single area MPR can at the same time show any section image and any curve section images of single portion of jaws. Conclusions Two MPR images can be applied to examine jaws for preoperative designs of dental implantation, and to examine postoperative implant in jaws. Combined application of these two techniques can investigate jaw shape, structure and bone quality, integration of dental implant with bone, and relation of dental implant with important structures in jaw.