Abstract
In the field of dental health care, plaster models combined with 2D radiographs are widely used in clinical practice for orthodontic diagnoses. However, complex malocclusions can be better analyzed by exploiting 3D digital dental models, which allow virtual simulations and treatment planning processes. In this paper, dental data captured by independent imaging sensors are fused to create multi-body orthodontic models composed of teeth, oral soft tissues and alveolar bone structures. The methodology is based on integrating Cone-Beam Computed Tomography (CBCT) and surface structured light scanning. The optical scanner is used to reconstruct tooth crowns and soft tissues (visible surfaces) through the digitalization of both patients' mouth impressions and plaster casts. These data are also used to guide the segmentation of internal dental tissues by processing CBCT data sets. The 3D individual dental tissues obtained by the optical scanner and the CBCT sensor are fused within multi-body orthodontic models without human supervisions to identify target anatomical structures. The final multi-body models represent valuable virtual platforms to clinical diagnostic and treatment planning.
Highlights
The development of procedures for the computerized design and manufacturing of custom dental devices has become of growing interest to orthognathic and orthodontic treatments
The finall orthodontiic model iss provided by b the fusio on of the multi-modal m data sets including i thhe m most accuraate represenntation for each e tissue:: i.e., tooth crowns annd gingiva bby optical scanning s annd toooth roots and alveolaar bone by Cone-Beam Computed Tomography (CBCT) imaaging
The final step consists in merging the multi-modal dental data in order to provide an accurate full orthodontic representation including individual crowns obtained by the optical scanner and roots reconstructed by the CBCT
Summary
The development of procedures for the computerized design and manufacturing of custom dental devices has become of growing interest to orthognathic and orthodontic treatments. CT toooth modells includingg the roots were manuually segmeented and reconstructe r ed by using g commercial s software thouugh outlininng and maskking tools whhich required d labor intennsive and tim me consumin ng efforts In this paaper, a 3D data d fusion methodology m y has been developed d inn order to ccreate reliablle multi-boddy o orthodontic m models by using a Coone-Beam Computed. The finall orthodontiic model iss provided by b the fusio on of the multi-modal m data sets including i thhe m most accuraate represenntation for each e tissue:: i.e., tooth crowns annd gingiva bby optical scanning s annd toooth roots and alveolaar bone by CBCT imaaging. D d digital modeel, relative to t a complexx case with impacted teeeth, is finaally presenteed and discu ussed
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