Clinical Performance of a New Biomimetic Double Network Material

Abstract

Background: The development of ceramics during the last years was overwhelming. However, the focus was laid on the hardness and the strength of the restorative materials, resulting in high antagonistic tooth wear. This is critical for patients with bruxism. Objectives: The purpose of this study was to evaluate the clinical performance of the new double hybrid material for non-invasive treatment approaches.Material and Methods: The new approach of the material tested, was to modify ceramics to create a biomimetic material that has similar physical properties like dentin and enamel and is still as strong as conventional ceramics. Results: The produced crowns had a thickness ranging from 0.5 to 1.5 mm. To evaluate the clinical performance and durability of the crowns, the patient was examined half a year later. The crowns were still intact and soft tissues appeared healthy and this was achieved without any loss of tooth structure. Conclusions: The material can be milled to thin layers, but is still strong enough to prevent cracks which are stopped by the interpenetrating polymer within the network. Depending on the clinical situation, minimally- up to non-invasive restorations can be milled. Clinical Relevance: Dentistry aims in preservation of tooth structure. Patients suffering from loss of tooth structure (dental erosion, Amelogenesis imperfecta) or even young patients could benefit from minimally-invasive crowns. Due to a Vickers hardness between dentin and enamel, antagonistic tooth wear is very low. This might be interesting for treating patients with bruxism.

Translucency of esthetic dental restorative CAD/CAM materials and composite resins with respect to thickness and surface roughness

“…Altogether, 3 different CAD/CAM glass ceramics, a fine-structure feldspathic ceramic, a hybrid ceramic, a nanoceramic composite resin, an experimental CAD/CAM nanohybrid composite, and 2 interim materials (PMMA) were analyzed. 36 Furthermore, because the manufacturer points out the unproblematic individualization of the CAD/CAM restoration with the recommended composite resin (Filtek Supreme XTE for LAVA Ultimate and Tetric EvoCeram for Telio CAD), 37,38 those materials should ensure color matching to the surrounding restoration and were also tested. One bulk-fill composite resin was added to the study to broaden the spectrum with a substance class with a relatively high translucency.…”

A multi technique study of a new lithium disilicate glass-ceramic spray-coated on ZrO2 substrate for dental restoration

“…Yttrium-stabilized tetragonal zirconium dioxide has a Vickers hardness of more than 1250 MPa [13,17,18,26,27]. The hardness of natural tooth enamel is lower, closer to 275-550 MPa [10,26,27], and thus, comparable to the hardness of glasses and glass-ceramics [28]. Abrasion depends foremost on the smoothness and only secondarily on the difference in hardness, therefore, the observed difference in hardness between TZ3Y and natural teeth is only a minor factor.…”

“…This makes TZ3Y the predestined material for framework ceramics [14,18]. Yttrium-stabilized tetragonal zirconium dioxide has a Vickers hardness of more than 1250 MPa [13,17,18,26,27]. The hardness of natural tooth enamel is lower, closer to 275-550 MPa [10,26,27], and thus, comparable to the hardness of glasses and glass-ceramics [28].…”

Restaurations coronoradiculaires des dents dépulpées par endocouronnes

“…La céramique classique est le matériau idéal pour le restauration de l'émail et l'un des avantages de la céramique hybride Enamic 1 et Enamic 2 en cours de développement est son module d'élasticité proche de la dentine (18)(19)(20)(21)(22), ce qui se traduit par des contraintes mieux réparties sur les structures dentaires. La céramique hybride (dentine) et la céramique classique (émail) seraient donc complémentaires, leur utilisation combinée permettrait de se rapprocher au mieux des propriétés des tissus de la dent naturelle.…”