光学相干断层扫描观察白内障术后黄斑区病变

通过光学相干断层扫描(optical coherence tomography,OCT)技术来早期明确白内障超声乳化术后视网膜黄斑区病变.采集我院白内障超声乳化术及人工晶状体植入术后视力改善不良的老年性白内障患者,进行OCT检查,观察其图象特征.结果提示术眼黄斑区OCT图像表现为:黄斑区视网膜水肿,视网膜厚度增加;黄斑区增生膜形成,部分伴有黄斑区视网膜水肿;黄斑区神经上皮层变薄;黄斑裂孔形成;老年黄斑变性(萎缩性),表现为视网膜色素上皮层断裂、厚薄不均;部分病例视网膜色素上皮层增殖、断裂,表现为色素上皮损害.OCT由于其独特的横截面成像技术,通过精确测量视网膜厚度及观察视网膜反射性的改变,可以在白内障超声乳化术后早期发现黄斑区视网膜的病变,定量地了解病情的变化,是一种比较理想的检测手段.

The Application of Reverse Engineering in the Field of Dental Prosthetics

At present, China's dental prosthetics treatment is still constrained by the traditional backward technology and consumer attitudes; traditional restoration would not be able to satisfy the growing demand of people in the production process, materials, appearance and price. The combination of modern dentistry and CAD/CAM technology based on the reverse engineering reduce the labor intensity of the doctors, and also shorten the time for treatment of the patients, make restoration more attractive, better accuracy and suitability. In the research process, we should apply the latest achievements of other related disciplines to serve dental prosthetics on the basic research and clinical practice.