Data Compression Method for Trimmed Surfaces Based on Surface Fitting with MaintainingG1Continuity with Adjacent Surfaces
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Abstract
The goal of virtual orthodontic treatment planning is to re-position the teeth in a digital dental model so that the desired alignment of the teeth on each dental arch and occlusion (i.e., matching) of the upper and lower arches is achieved.The input to the planning process is a collection of individual tooth objects obtained by segmenting a noisy 3D surface mesh that is generated by laserscanning a plaster model of the dental arch built from patient-specific dental impressions.A key step in the planning is the identification of features on the surface of the teeth such as cusps, grooves, incisal edges, marginal ridges, and occlusal surface boundary, that are important both for carrying out the alignment and evaluating its quality.This paper presents a collection of techniques to identify such features automatically, with minimal user intervention.Experimental results are presented that show the effectiveness of the approach.
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