Cad cam technology seminar presentation using microsoft word.
- 3. CAD/CAM DENTISTRY and prosthodontics using CAD/CAM to improve the design and creation of dental restorations, especially dental prostheses,including crowns crown lays veneers, inlays and onlays, fixed bridges, dental implant restorantion, dentures(removable or fixed) and orthodontic appliances. CAD/CAM complements earlier technologies used for these purposes by any combination of increasing the speed of design and creation: increasing the convenience or simplicity of the design, creation, and insertion process: and making possible restorations and appliances that otherwise would have been infeasible. Other goals include reducing unit cost and making affordable restorations and appliances that otherwise would have been prohibitively expensive.
- 4. “Markets are changing across the board, and the dental industry is no exception. The catalyst for change in this industry have been the digital platforms that have been developed, working in concert with the economic situation we find ourselves in today.
- 5. HISTORY *1950s U.S Air Force *1971 Dr.Duret-Sopha System(crowns) *1985 Dr.Moermann-CEREC system(inlay) *1980s Dr.Andersson-Procera system(titanium copings and composite veneered restorations) This system later developed as a processing center networked with satellite digitizers around the world for the fabrication of all-ceramic frameworks.
- 6. TYPES OF CAD/CAM RESTORATION *Inlays and onlays. * Veneers. * coping. * Substructures. * Full coverage crown. INLAYS AND ONLAYS Dental inlays and onlays are restoration used to repair rear teeth with mild to moderate decay or cracked and fractured teeth that are not sufficiently damaged to need a crown. Ideal candidates for inlay or onlay work typically have too much damage or decay in the
- 7. tooth structure to be successfully treated using a filling, but have sufficient healthy tooth remaining to avoid the need for a crown. This allows the dentist to conserve more of the patients original tooth structure. VEENERS In dentistry a veneer is a layer of material placed over a tooth , veneers improve the aesthetics of a smile and or/product the tooths surface from damage. There are two main types of material used to fabricate a veneer composite and dental porcelain. A composite veneer may be directly placed Or indirectly fabricated by a dental technician in a dental lab and later bonded to the tooth typically using a resin cement such as panavia.
- 8. COPING Using a Bunsen burner, the dental technician melts wax and applies it to the prepped tooth stump. This process is called fabricating a coping or framework (if a bridge) which supports the tooth coloured material called porcelain. The wax coping is invested in high heat stone, burned out in an oven and cast into metal. SUBSTRUCTURES The metal framework which is beneath the soft tissues and in contact with bone for the purpose of supporting an implant denture superstructure.
- 9. ADVANTAGE Eliminates second visit No casting errors Accuracy of impression and restoration No layering errors Opportunity to view, adjust, rescan Cost effective No physical impression for the patient Cross infection control Saves time and labor No Temporization View occlusion digitally Esthetic
- 10. Initial equipment cost Capturing errors Colour customization
- 11. PROCESS SCANNING THEN DESIGNING THEN MILLING DIGITIZERS/SCANNERS Surface of stone model is measured by tools, called digitizers and scanners, to obtain digital data that represent morphology of target tooth. *Contact probe. *Laser beem with position sensing device sensor. *Laser with CCD camera. *Intra oral digitizers.
- 12. CAD /CAM SYSTEM *IN OFFICE SCAN, fabricate and seat within same appointment. *CAD/CAM DENTAL LAB MODELS scan a stone ast of prepared tooth in lab. Produce coping and porcelain is then added. *CAD/CAM FOR OUTSOURCING network machining centre. DIFFERENT CAD/CAM, SYSTEMS CEREC 123 DCS precident Cercon Procera all ceram 1994 Cicero 1999 Lava 1001 Everest Katana iTero
- 13. TYPES OF MANUFACTURING subtractive manufacturing-power driven machine tools as lathes, milling machine, drill press. Additive manufacturing- series of cross sectional slices layered on top of one another.