Three dimensional teeth designs generated by NURBS modeling

METHODS: For most situations, a single scan will not produce a complete model of the object. Multiple scans, from many different directions are usually required to obtain information about all sides of the object. Therefore different normal plaster teeth were scanned rotary and from a single plane using a laser scanner PLX 1200.These scans were brought in a common reference system, a process that is usually called alignment, and then merged to create a complete model. Resulted files were imported in Rhinoceros NURBS modeling program, were the point clouds from the teeth surfaces were cleaned and assembled. The collected data were used to construct three dimensional models. These points were used to extrapolate the shape of the subject, a process called reconstruction (Fig. 1). Reconstruction involves finding and connecting adjacent points in order to create continuous surfaces.