A new method for generating ceramic restorations: a CAD-CAM system

Article Abstract:

A revolutionary new technique now available in dentistry is computer-aided design and computer-aided manufacturing (CAD-CAM). Various CAD-CAM systems have received attention in the literature, but one that has not been publicized widely is CEREC (ceramic reconstruction), which was developed in West Germany and designs and mills ceramic restorations electronically. A small, hand-held camera takes a picture of the prepared tooth and the image is displayed on the computer terminal screen. The computer designs the inlay or onlay to fit precisely into the space to be filled. A block of porcelain is then milled in stages according to the electronic model; the process of designing and milling the restoration takes only 10 to 15 minutes. A major advantage of CEREC is that the restoration can be completed in one appointment, since it is not necessary to take impressions or manufacture temporary prostheses. No laboratory assistance is needed; the clinician can perform the entire procedure alone or with the help of one assistant. The restorations that can be constructed are inlays, onlays and veneers, including multisurface restorations with occlusal cusp replacement. The unit that houses the computer screen and milling equipment is the size of a tabletop personal computer and rests on a stand with wheels. The CEREC CAD-CAM system is in use in West Germany and it should be available in the United States at the end of 1989. (Consumer Summary produced by Reliance Medical Information, Inc.)

Methods, Innovations, Equipment and supplies, Dentistry, Fillings (Dentistry), Dental fillings, Prosthodontics, Dental prostheses, Dental technology

---

Evaluating CAD-CAM generated ceramic veneers

Article Abstract:

The CAD-CAM (computer-aided design/computer-aided manufacturing) technique may be an effective method for making ceramic veneers to fit the teeth of patients requiring restorative dentistry. Restorative dentistry is the replacement by artificial means of a missing, damaged or diseased tooth or teeth. A study compared the use of the CAD-CAM method to the refractory method for making ceramic veneers for 30 human maxillary central incisors. The ceramic veneers made using the CAD-CAM method were comparable to those made in the laboratory using the refractory method. The interfacial gap was approximately the same for CAD-CAM veneers and laboratory-processed veneers. Veneers made in the laboratory frequently needed contouring of facial surfaces. CAD-CAM veneers often required contouring of the internal surfaces of the veneer next to the prepared tooth.

Usage, Software

---

Will ceramic restorations be challenged in the future?

Article Abstract:

Resin-based composite systems have been developed that have the advantages of ceramics but do not damage the surrounding teeth. In the past, resins had an unacceptable wear rate, but their wear resistance is improving.

Analysis, Dental resins

Similar abstracts:

• Abstracts: Validity of criteria used for detecting underuse of coronary revascularization. Measuring Underuse of Necessary Care Among Elderly Medicare Beneficiaries Using Inpatient and Outpatient Claims
• Abstracts: Fit for practice. Fit for practice 6.3: Care pathways
• Abstracts: Wish knew. Child's ultimate guide to getting your baby to sleep. Smart vacations
• Abstracts: Forge ahead with foreign exchange. Understanding is the key. Just do it
• Abstracts: ADA vs. Aetna: membership advocacy aimed at protecting the dentist-patient relationship. Stress, strain and unpaid claims

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.