Dental Asia Jan/Feb 2019

User Report DENTAL ASIA JANUARY / FEBRUARY 2019 40 Abstract Direct composite veneers presented some drawback when it comes to the difficulty of execution and colour instability of the composite over time. The simplified application of the PCRVs presented as an interesting alternative in cases of smile asymmetry, large deficient restorations and discoloured tooth. In the present investigation, the complete description of the PCRVs technique can help the dentist during the planning and execution of treatments with the Componeer system. Introduction Dental veneers have become an attractive treatment in dentistry, spurred on by the development of different materials and techniques associated with the aesthetic patterns imposed by society. 1 In general, patients that presented clinical scenarios in the anterior teeth such as increased interdental spaces, fractures, deficient restorations or colour changes are indicated for treatment with veneers. 2-3 The success of the veneers is associated with the dentist’s knowledge, the technique used, the restorative material (dental ceramics and composite resin) and the patient’s collaboration. 4 The ceramic veneers were proposed by Dr. Charles Pincus in 1938. 5 Since then, treatment with ceramic veneers has become one of the greatest themes in dentistry which give excellent aesthetic results. Ceramics are biocompatible, exhibit high wear resistance and great colour stability. Nowadays, ceramic is the main restorative material used in veneer treatments. 8-9 However, some specific properties such as brittleness and superior hardness of the ceramic in relation to the dental tissue are the disadvantages considered for this class of restorative materials. Additionally, the high cost of the ceramic prevents some patients from proceeding with the treatment. 10-11 Restorative protocols with direct composite veneers have been introduced as an alternative for patients who cannot afford the high inherent cost of ceramics. Although cheaper, this technique presents some drawbacks, including the difficulty in mirroring, colour matching, construction of structures (ex. dentin mamelons and enamel characteristics such as translucency/opalescence) and the incorrect reproduction of the dental surface texture. 12 Additionally, the time required to execute the resin veneer, the colour instability of the material, marginal infiltration and secondary caries are critical factors that intimidate the dentist. 8,12 The PCRVs s imp l i f y t he v enee r technique and their properties can improve the treatment’s longevity. 13 The PCRV Componeer is manufactured from the composite Synergy D6 or Brilliant NG - nanohybrid materials. The PCRVs are fabricated under controlled laboratory conditions in relation to light, pressure and temperature. After these treatments, the material exhibits improved polymerisation, reaching a higher degree of conversion with lower pores and internal defects. PCRVs are available for the anterior teeth with 0.3-1.0 mm of thickness with different sizes (small, medium, large and extra-large), two shades (transparent a n d b l e a c h ) a n d p ropo r t i ons ba s ed on the golden ratio concepts. 13-15 I n t h e r e v i e w e d literature, there are no clinical studies reporting the use of PCRV fabricated with the Brilliant NG composite resin. Only works with the PCRV produced with the Synergy D6 composite resin are available. According to the manufacturer, the Brilliant NG resin has a different organic matrix compared to Synergy D6, which influence the final behaviour of restorations over time. Therefore, the aim of the study is to describe two cases (step- by-step) with PCRV fabricated with the Brilliant NG resin. PREFABRICATED RESIN VENEER: A CASE REPORT OF A SIMPLIFIED RESTORATIVE TECHNIQUE By Dr. Pedro Paulo Albuquerque , Dr. Marina Baretto Pereira Moreno , Dr. Alexander Cassandri Nishida , Dr. Ezequias Rodrigues , Dr. Camila Kiyohara and Dr. Carlos Eduardo Francci The study aims to describe the step-by-step clinical cases using prefabricated composite resin veneers (PCRVs), manufactured with the composite Brilliant New Generation (COLTENE). Fig. 1a: Initial situation Case 1: Single tooth restored with a PCRV A 42-year-old male patient presented with a debonded restoration in tooth #22 (Fig. 1a). A clinical examination revealed acceptable periodontal condition and no carious lesions. After analysing the size of the restoration and the patient’s request, rehabilitation with PCRV (Componeer - Brilliant NG) was proposed. The colour matching was performed with a colour shade guide of the PCRV system, and the A2/B2 dentin shade