【摘要】 预备体颈缘线的提取技术是保证口腔CAD/CAM修复体边缘密合性的重要环节,对修复体质量和牙周组织健康至关重要.文中提出了一种口腔牙齿预备体颈缘线半自动提取算法.该算法首先对三角网格上的离散曲率进行分析,估算了网格点的曲率值,然后利用"方向"追踪方法快速提取初始特征线,再利用"曲率"吸引策略保持能量最小的方法优化网格特征线.应用实例表明,文中算法是有效的、可行的.更多还原

【Abstract】 The extraction of dental preparation line is one of the key steps that affects the marginal adaptation in dental CAD/CAM and is very important to the restoration quality and the protection of periodontal tissues.This paper proposes a semi-automatic extraction algorithm of dental preparation line.In this algorithm,the discrete curvature of the triangle mesh in the dental model is analyzed and estimated,and an initial preparation line is extracted by means of the direction tracking method.Then,the initial preparation line is optimized by means of the "curvature attraction" based on the minimum energy principle.Case study demonstrates that the proposed algorithm is effective and feasible.更多还原