Faccette in ceramica feldspatica stratificata: limiti e soluzioni del digital workflow Feldspathic laminated veneers: limits and solutions of digital workflow

OBJECTIVESDescription of limits and solutions to optimize and overcome the obstacles that arise in the digital workflow for the production of feldspathic laminated veneers.The digitized procedures for making dentures represent one of the great innovations in the dental field of the last decade.Analog work processes are increasingly being replaced by more and more precise and reliable digital workflow.Aesthetic rehabilitations with ceramic veneers with minimally invasive preparations is today one of the topics of great interest in prosthetic dentistry. The most commonly used materials are: feldspathic ceramics, lithium disilicate and composite resins.The definition of an entirely digital flow is not however exact because, often, manual intervention is needed to improve aesthetics. In the workflow presented for the realization of feldspathic laminated veneers, the direct intervention of the dental technician is decisive for the need to manually carry out ceramic layering and firing.MATERIALS AND METHODSAn exemplary case of reconstruction of the dental elements from 1.3 to 2.3 with feldspathic laminated veneers is proposed by the realization of a prototype model based on the optical impression, the duplication of the abutments in silicone and their development in refractory material such as to obtain a valid support for the layering and firing of the ceramic.RESULTS AND CONCLUSIONSIn dental technology an entirely digital workflow is not always feasible. For some processes both to reach the maximum aesthetic value and for practical reasons - they still need to be manual. The absence on the market of a homogeneous, compact refractory material immersed in a sufficiently tenacious binder that allows the creation of blocks or pods to be used with numerical control milling machines does not allow the realization of refractory dies directly from the digital flow. It is therefore necessary to create a physical model with removable abutments that can be duplicated in refractory material.The remarkable reliability of the materials used for the prototyping of the models makes it possible to obtain, in the impossibility of realizing an entirely digital workflow, the duplication of the refractory abutments and the realization of feldspathic laminated veneers.In the sequence presented, the digital procedures were combined with the traditional ones.CLINICAL SIGNIFICANCEWe wishes to show the best way to realise feldspathic veneers starting from a digital impression. The digital workflow presents advantages such as: the absence of use of impression or developing materials, in addition to the costs, difficulties and risks related to sending traditional impressions to the laboratory. All of this factors, combined with the precision and accuracy of some optical impression systems, increasingly direct us to use this type of system for the realisation of prosthesis up to now only achievable with a traditional workflow.