Computer-aided Design/Computer-aided Manufacturing Applications Using CT and Cone Beam CT Scanning Technology
Section snippets
Clinical applications
A 55-year-old male presented with severe and advanced periodontal disease in his remaining mandibular teeth (Fig. 1). He had been informed about the hopeless prognosis of the mandibular teeth for many years, however his fear of dentistry prevented him from completing the recommended care. The seeding of bacteria as a consequence of the periodontal disease became a focus when other heart-related concerns were discovered. The patient was adamant in his desire to replace the teeth with a fixed
Surgical intervention
Surgical templates have been fabricated in several forms: (1) the original bone-borne template, (2) the tooth-borne template, and, more recently, (3) a soft tissue–borne template. As this particular case presentation involved tooth extraction, bone reduction, and implant placement, it was elected to use a bone-borne template. There is an important caveat with regard to tooth extractions and alveolectomy when working with bone-borne templates: do not remove the bone until all osteotomies have
Computer-aided design planning capabilities
Presurgical prosthetic planning for placement and restoration of dental implants should follow a sound foundation of accepted prosthodontic protocols. The importance of accurate study casts, determination of vertical dimension of occlusion, proper articulation, diagnostic wax-ups, lip support, and an understanding of the functional and esthetic concerns cannot be underestimated to achieve predictable results. To facilitate accurate planning, it is desirable to create a radiopaque template that
Present and future CAD-CAM applications
The advent of realistic CAD implants, realistic CAD abutments, and virtual teeth allows for premier planning capabilities right now. This technology however has also proven to be a direct path to the future [3], [11]. There are several companies currently developing new and exciting methods to harness digital dentistry through the use of intraoral optical scans, flash-CT scanning of impressions, laser-scanning of casts or impressions, and advanced CAD/CAM machining of both titanium and Zirconia
Summary
CT and CBCT technology provides clinicians with new methods to view patient anatomy exceeding conventional 2-D radiology. Interactive software applications allow for improved interpretation of the CT scan data by incorporating tools for identifying vital anatomy, bone topography and quality, simulated implant placement, simulated abutment placement, and the fabrication of CT-derived surgical templates. The use of realistic CAD implants and CAD abutments provides the clinician with unprecedented
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Cited by (40)
Cone-beam computed tomography of the orbit and optic canal volumes
2016, Journal of Cranio-Maxillofacial SurgeryCitation Excerpt :CBCT of craniofacial bones is used for diagnosing a number of bone pathologies and for planning surgical procedures, for example, individualised implant fabrication (Kim et al., 2012). Spatial resolution of bone is generally higher in CBCT than in CT and the field of view can be individually adjusted, allowing further reduction of the radiation exposure to the patient (Ganz, 2008; Brisco et al., 2014). However, accuracy of imaging using CBCT in clinical application is estimated to be in the range of 0.5 mm at best (Horner et al., 2013).
Computer-Assisted Implant Surgery
2016, Computer-Guided Applications for Dental Implants, Bone Grafting, and Reconstructive SurgeryThree-Dimensional Imaging and Guided Surgery for Dental Implants
2015, Dental Clinics of North AmericaSoftware tools and surgical guides in dental-implant-guided surgery
2014, Dental Clinics of North AmericaCitation Excerpt :There are numerous clinical applications for CBCT, such as for endosseous dental implant placement planning, orthodontics, endodontics, periodontics, temporomandibular joint dysfunction, pathology, and trauma. As dental implants increased in popularity as tooth replacement therapy, the accurate assessment of patient anatomy and the collaboration between restorative clinicians and surgeons have become critical determinants of successful outcomes.1 Conventional periapical and panoramic imaging techniques combined with visual inspection and clinical palpation may be insufficient to obtain the best presurgical planning in complex or compromised cases.2
Endodontic applications of cone beam computed tomography
2014, Dental Clinics of North AmericaCitation Excerpt :It was determined that six implants could be placed in the area of missing anterior teeth and immediately restored with laboratory-fabricated screw-retained provisional restorations. A computer-generated surgical guide was fabricated using the DICOM data and SIMPLANT software.13 The surgery was carried out uneventfully and the implants were immediately provisionally restored.
Computer-assisted implantology
2012, Revue de Stomatologie et de Chirurgie Maxillo-Faciale