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10 Dental Tribune Middle East & Africa Edition | July- August 2014news > Page 12 VITA ENAMIC® redefines load capacity.* The first hybrid ceramic with dual network structure for unsurpassed absorption of masticatory forces VITA ENAMIC sets new standards for resistance by combining strength and elasticity and providing unsur- passed absorption of masticatory forces. VITA ENAMIC ensures utmost dependability and efficient processing for dental practices and laboratories. And patients feel The En formula for success: strength + elasticity = reliability² 3411E that VITA ENAMIC restorations are identical to natural teeth. VITA ENAMIC is particularly suited for crown resto- rations in the posterior area and minimally invasive restora- tions. More information at www.vita-enamic.com facebook.com/vita.zahnfabrik *) In addition to a high degree of elasticity, this innovative hybrid ceramic guarantees particularly high strength after adhesive bonding. 3411E_210x297 V13 neu.indd 1 06.06.13 11:01 Weightlifter grits his teeth – a case for VITA ENAMIC By Hermann Loos S tress and high demands literally make us grit our teeth. On a colleague’s homepage it says on the subject of teeth grinding and bruxism: “We can develop a weightlifter’s strength just by using our teeth”. The masticatory organ is ex- posed to forces of up to 800 new- tons during teeth clenching. The normal pressure of mastication is generally around 20 - 30 new- tons. Those affected are often people in certain professions, for example, those who work for long periods of time on the com- puter, as well as those whose work involves intensive physical exertion, like runners, cyclists, bodybuilders and, as previously mentioned, weightlifters. During subconscious clenching of the upper and lower teeth, the limit of physiological function is far exceeded. Not only natural tooth substance, however, but also restorative materials reach their limit during mechanical overload. In the clinical case ex- ample described here, this led to the fracture of an old all-ceramic crown restoration. Patient case The patient was a weightlifter by profession. He sought treatment for a fracture on the vestibular wall of his all-ceramic crown on tooth 25 (Fig. 1). He wanted a new, metal-free restoration. For the sake of time efficiency, treatment was planned with the CEREC chairside system. The material of choice A suitable material in this case was the new VITA ENAMIC, whose material composition and mechanical and physical properties offer a combination of ceramic and composite. The hybrid ceramic is a completely new generation of ceramic materials. The unique, dual network structure consists of a dominant ceramic network re- inforced by a polymer network. This follows the principle of compound materials, i.e. both networks penetrate each other mutually. Thus immense stabil- ity as well as extraordinary elas- ticity are guaranteed for the first time. In addition to classic, sin- gle tooth restorations (inlays, on- lays, veneers and crowns), VITA ENAMIC’s range of indications includes minimally invasive restorations and restorations ex- posed to high masticatory forces. VITA ENAMIC is available in the geometry (size) EM-14 (12 x 14 x 18 mm) and in the translu- cency levels HT (High Translu- cent) and T (Translucent) and in five VITA SYSTEM 3D-MASTER shades 0M1, 1M1, 1M2, 2M2 and 3M2. VITA ENAMIC can be pro- cessed with Sirona’s CEREC or inLab MC XL systems, software version 4.0 or higher. The treatment procedure After removing the fractured crown, further preparation suit- able for ceramic was carried out on tooth 25 (Fig. 2). The digital impression (Fig. 3) was per- formed using the CEREC AC acquisition unit and the Blue- cam. The CEREC 3D-software’s automatic biogeneric tooth modelling function was used for designing the crown restoration (Fig. 4). Occlusion registration was performed. The oppos- ing jaw was not scanned. The biogeneric reconstruction of the occlusal surfaces is based on a mathematical procedure that al- lows the automatic reconstruc- tion of the patient’s individual tooth morphology based on the morphology of the patient’s re- Fig. 1: Initial situation - frac- ture of the all-ceramic crown on tooth 25. Fig. 3: The digital model. Fig. 4: Design. Fig. 5 a: Different views of the crown after completion of the design ... Fig. 5 b: ...in the milling pre- view. Fig. 2: Preparation.