January 2019 - CAD/CAM at the Faculty of Montpellier

A Special AO News - January 2019

Did you say CAD/CAM?

Many things have changed since François Duret's seminal thesis on optical impressions, and indeed, the invention of CAD/CAM in dentistry.

For many years, the image of CAD/CAM was associated with the Cerec system. Its primary vocation was to produce chairside ceramic parts for bonding to reconstruct damaged teeth, in whole or in part. At the same time, the "Procéra" system in the early 2000s introduced practitioners to laboratory CAD/CAM and new materials. Today, CAD/CAM seems ubiquitous: you can't open a professional journal without seeing it "on the front page". More and more practitioners are asking themselves: is it time to "switch" to optical impressions? Should I integrate CAD/CAM into my practice? And how? Read the introduction

The subject is not lacking in ambition in 2018; it has a sort of odor of the past (Fig.1), I would even go so far as to say that it is becoming a "pleonasm", for how can we dissociate dentistry, aesthetics and digital in a modern world? Until 1970, all that was associated with dentistry was Art with a capital "A". Today, science, with digital technology at its forefront, is making a dramatic entrance, and that's just as well for those who love our profession. But that doesn't mean we can't approach it with a certain distance. That's what we're going to do with you. Article

Introduction

Today's adhesive techniques enable a more conservative approach to restorative and esthetic treatment, and have led to a real change in our daily practices. Combined with the therapeutic gradient, digital dentistry and esthetics is a "new" factor that is developing more and more, even though this technology was invented in 1973 by François Duret. Today, more and more restorations are made using optical impressions. (Figs. 15 and 30). Article

This patient was treated at the Centre de Soins Dentaires du CHU de Montpellier.

Reason for consultation

The patient was referred to the prosthetics department for a temporary but esthetic and long-lasting restoration on 22. It was decided to make a bonded ceramic veneer. It will serve as a temporization solution pending management of his anterior open bite by orthodontics and orthognathic surgery, once the patient's vertical growth is complete.Read article

Ceramic blocks for direct CAD/CAM machining

In 1985, the first CAD/CAM inlay (1) was machined from a feldspathic ceramic block (Vita mark I)(2). Since the 1980s, a number of different systems have been developed and evolved through a range of software and equipment(3), (4). Today, they offer the possibility of machining inlays, onlays, veneers, crowns or even bridges and implant abutments(5).Initially, materials had to be sufficiently resistant yet easy to machine. Feldspathic ceramics were ideally suited to the production of small occlusal inlays (CEREC 1)(2).Article