Research On Delaunay Based On Virtual Plant Guide Gathered The Registration Points

With the gradual development of image processing technologies and medical imaging information visualization technology matures, oral surgery clinical safety and minimally invasive as possible. Digital image visualization of information technology as the core of the oral virtual planting assisted surgery systems have become the object of clinical attention in the visual field. However, the virtual planting guide plate as a guide implant surgery transfer media and information carriers, is the key to ensure that dental implant surgery and accurate transfer, but due to the traditional planting guides through the plaster model making, can not get the jaw precise organizational structure, production process there are obvious defects in the safety and reliability, the organization growing areas prone to fractures, complications such as perforation of the mandibular canal.This article aims to oral dimensional CT image visualization technology, geometry guitar body by planting zones, tooth surface profile measurement study edge features, the improved algorithm for reconstruction under the core technology Levelset alveolar nerve canal anatomy of this process, re-registration based on Delaunay fusion technology to generate target planting area planting a virtual template, finally combining spatial characteristics of perfect positioning guides planting design. Research work is reflected in the following three aspects:First, improved dental study neural tube Levelset segmentation method:By analyzing the complexity of the neural tube itself edge dental proposed arch curve constraints Levelset algorithm for multi-level set of primary and secondary statistical model, the algorithm makes full use of dental neural tube local information arch curve, shape and boundary information combined with regional advantages of multi-level set function constraints, not only an effective solution to a single level set speed function definition function difficulties and the lack of horizontal velocity feedback control problems, and the introduction of combined dental arch local information, regional integration, shape and boundary information constraints, can effectively reduce the amount of calculation taking into account the global and local feature information, improve dental neural tube segmentation accuracy.Second, study guides dental implants virtual design:by mixing algorithm based on the normal characteristics of the surface of ICP, the MC surface reconstruction technology to build3D models and Delaunay triangulation point network algorithm for dental reconstruction studded with semi-integration model, generate accurate dental structure and other related information, select the appropriate template as a guide portion engageable with the oral surface mating surfaces, then shell and draft guides designed to effectively reduce the traditional multi-step manual planting surgical operation, greatly improving the accuracy and stability of the guide plate positioning.