Comparison of three-dimensional computed tomography with rapid prototype models in the management of coronoid hyperplasia
Comparison of three-dimensional computed tomography with rapid prototype models in the management of coronoid hyperplasia
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DOI：
10.1038/sj.dmfr.4600646
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发表时间：
2001-11-01
影响因子：
3.3
通讯作者：
Kishi, K
中科院分区：
文献类型：
--
作者：
Asaumi, J;Kawai, N;Kishi, K
目的：比较(1)3DCT WILT快速成型(RP)模型的准确性和(2)它们在处理冠状突增生症中的应用。方法：用成人干燥颅骨比较3DCT和RP模型的复制精度；测量聚合收缩和27个解剖点间的17个距离。对2例冠突增生症患者分别用三维CT和塑料模型进行测量。结果：RP模型和干燥颅骨的测量结果差异较小(P=0.04)。聚合收缩大于RP模型的复制误差，与3DCT的误差大致相同。冠突增生症患者冠突增厚突出，颧弓与冠突间隙小，早期接触。该塑形模型复制了面朝延长突凹处的颧骨内表面的外生骨痂。1例冠突前倾。结论：该模型能较准确地再现颌面部畸形与冠突的关系。Trismus可能是由于扩大的冠突的方向和长度所致。
Objectives: To compare (1) the accuracy of 3DCT wilt rapid prototyping (RP) models and (2) their application in the management of coronoid hyperplasia.Methods: An adult dry skull was used to compare 3DCT and a RP model for accuracy of reproduction; Polymerisation contraction and 17 distances between 27 anatomical points were measured. Two patients with coronoid process hyperplasia were assessed by means of 3DCT and plastic models.Results: Differences in measurements with the RP model and the dried skull were smaller than those with 3DCT (P=0.04). Polymerisation contraction was greater than the errors in reproduction with the RP model and approximately equal to those with the 3DCT. The coronoid process was thick and prominent in the patients with coronoid process hyperplasia and the small space and early contact between zygomatic arch and the coronoid process demonstrated. The plastic model duplicated the exostosis of the inner surface of the: malar bone facing the concavity of the elongated process. The coronoid process had an anterior tilt in one case.Conclusion: The plastic model duplicated the relationship between the maxillofacial deformity and the coronoid process with tolerable accuracy. Trismus may be due to the direction as well as the length of the enlarged coronoid process.