目的

探讨计算机辅助设计（CAD）与制作在磁性固位分体式上颌骨赝复体修复中的应用。

方法

对2 例单侧上颌骨缺损患者采用CAD 技术和快速成型（RP）技术制作硅橡胶阻塞器，再通过临床硅胶印模制作活动支架义齿，并利用磁性附着体将两者连接。 戴入阻塞器及活动义齿，检查其就位、固位和稳定情况；通过口内含水、低头鼓漱的方法检测口鼻腔封闭性；利用分光光度法对附着体安放前后咀嚼效率进行比较。

结果

采用CAD 和RP技术制作的硅橡胶阻塞器与口腔和鼻腔组织密贴，固位良好；安置磁性附着体的活动支架义齿与阻塞器贴合，就位顺利，固位和稳定性良好；口鼻腔封闭检查结果：封闭性良好，戴入义齿后无水从鼻腔流出。 咀嚼效率测试结果：两例患者在附着体安放后咀嚼效率都有显著提高。

结论

磁性附着体的应用可以提高单侧上颌骨缺失赝复体的固位与稳定，改善咀嚼功能。

Objective

To explore the application of computer aided design/computer aided manufacture in the magnet-retained obturator restorations of unilateral maxillary defect.

Methods

Two patients with unilateral maxillary defect were involved in the study.Three months after maxillectomy， CT scan measured the maxillary defects， and the images were processed and designed by the Simplant-CMF software.The resin models of the defects were manufactured by rapid prototyping machine and the silicone rubber obturators were fabricated by perfusion and coating methods.Sectional obturators were tried in and then impressions were obtained to fabricate the removable partial dentures.Magnetic attachments were set up to connect the denture with the silicone rubber obturator.After the prostheses were finished and tried in， their stability and retention were studied.Sealing abilities between the oral and nasal cavities were measured by rinsing， while the masticatory functions were tested by spectrophotometry method.

Results

The marginal fitness， retention and sealing abilities of these prostheses were good.Their masticatory efficiencies improved a lot.

Conclusion

Magnetic attachments can enhance the retention， stability and masticatory function of prostheses in unilateral maxillary defect.