ABSTRACT
STATEMENT OF PROBLEM: Ultrathin bonded posterior occlusal veneers represent a conservative alternative to traditional onlays and complete coverage crowns for the treatment of erosive dental wear. Data regarding the clinical performance of ceramic and composite resin ultrathin occlusal veneers are lacking. PURPOSE: The purpose of this prospective randomized clinical trial was to evaluate the influence of computer-aided design and computer-aided manufacturing (CAD-CAM) restorative material (ceramic versus composite resin) on the clinical performance of ultrathin occlusal veneers bonded to worn posterior teeth. MATERIAL AND METHODS: Eleven participants (mean age, 30.4 years) had their posterior teeth restored with 24 ceramic (e.max CAD) and 36 composite resin (Lava Ultimate) ultrathin occlusal veneers. The material type was assigned randomly. The tooth preparations were trial restoration driven and included immediate dentin sealing (OptiBond FL). The intaglio surfaces of the ceramic restorations were etched with hydrofluoric acid and silanated, and the composite resins were airborne-particle abraded and silanated. The tooth preparations were airborne-particle abraded and etched with phosphoric acid before restoration insertion. All restorations were adhesively luted with preheated composite resin (Filtek Z100). The participants were evaluated according to the modified United States Public Health Service (USPHS) criteria at baseline and then each year for up to 3 years. Survival rates were estimated with time to failure (primary outcome of interest) as the endpoint (scores 4 or 5). RESULTS: No restorations were lost. Five partial failures, in the form of chipping (all scored 4), were observed in the composite resin group (Lava Ultimate). The Kaplan-Meier survival rates were 100% for ceramic and 84.7% (SE 0.065%) for composite resin. Differences between the 2 groups were not statistically significant (P=.124). In the surviving restorations, significant difference (P=.003) was found for surface roughness as restorations in the composite resin group experienced some surface degradation. CONCLUSIONS: The findings of this medium-term clinical trial suggest that ceramic (e.max CAD) and composite resin (Lava Ultimate) CAD-CAM ultrathin occlusal veneers presented statistically comparable performance regardless of the minor partial failures (restorable chipping) observed in the composite resin group. Higher surface degradation was observed in the composite resin group.
Subject(s)
Composite Resins , Dental Veneers , Adult , Ceramics , Computer-Aided Design , Dental Porcelain , Dental Restoration Failure , Humans , Materials Testing , Prospective StudiesABSTRACT
Introduction: Biocorrosion is a multifactorial disorder that causes dissolution of hard tissues by extrinsic/ intrinsic factors. Traditionally, restoring biocorrosion wear involves invasive preparations. Objective: This case report aims to describe the rehabilitation of biocorrosion with a minimally invasive approach (thin occlusal and vestibular ceramic laminates) in a fully digital workflow using natural algorithms. Case report: A 23-year-old patient was presented to clinic with generalized tooth wear associated to dentin hypersensitivity. In anamnesis, eating disorders and acid food consumption were reported, supporting the diagnosis of biocorrosion. The restoration of worn tissues involved an additive approach (minimizing additional wear), using a face guided planning protocol and a natural tooth anatomy database to achieve greater naturalness at the final restorations. Rehabilitation of worn tissues was performed using occlusal, anterior ceramic veneers and additive composite restorations. The patient's natural teeth characteristics were preserved, restoring aesthetic and self-esteem, and after 2- year follow-up the patient remains very satisfied. Conclusion: Additive approaches involving the least amount of tissue wear are essential for the biocorrosion restoration. In addition, the integration of natural algorithms to digital workflows brings more aesthetic and precision to definitive restorations, overcoming one of the main challenges of milled aesthetic restorations: the naturalness.
Introdução: A biocorrosão é uma desordem multifatorial que causa a dissolução dos tecidos duros por fatores extrínsecos/intrínsecos. Tradicionalmente, a restauração do desgaste por biocorrosão envolve preparações invasivas. Objetivo: Este relato de caso tem como objetivo descrever a reabilitação da biocorrosão com uma abordagem minimamente invasiva (laminados cerâmicos oclusais e vestibulares finos) em um fluxo de trabalho totalmente digital usando algoritmos naturais. Relato de caso: Paciente de 23 anos foi atendido na clínica com desgaste dentário generalizado associado à hipersensibilidade dentinária. Na anamnese, foram relatados transtornos alimentares e consumo de alimentos ácidos, corroborando o diagnóstico de biocorrosão. A restauração de tecidos desgastados envolveu uma abordagem aditiva (minimizando o desgaste adicional), usando um protocolo de planejamento guiado pela face e um banco de dados de anatomia natural do dente para obter maior naturalidade nas restaurações finais. A reabilitação dos tecidos desgastados foi realizada usando facetas oclusais, anteriores de cerâmica e restaurações de resina composta aditiva. As características dos dentes naturais do paciente foram preservadas, restabelecendo a estética e a autoestima, e após 2 anos de acompanhamento o paciente continua muito satisfeito. Conclusão: As abordagens aditivas que envolvem o menor desgaste tecidual são essenciais para a restauração da biocorrosão. Além disso, a integração de algoritmos naturais aos fluxos de trabalho digitais traz mais estética e precisão às restaurações definitivas, superando um dos principais desafios das restaurações estéticas fresadas: a naturalidade.
Subject(s)
Tooth Erosion , Tooth Diseases , Computer-Aided Design , Dental Veneers , Tooth WearABSTRACT
The authors present a complete surgical and prosthetic case report of a 50-year-old male patient who lost the element 11 by periodontal disease, and during the phase of provisional restorations of the elements 12, 11, 21 and 22 had the element 21 fractured in domestic accident. The roots of the elements 11 and 21 suffered extraction and were replaced in the same act by a conic osseointegrated HE implant measuring 18 X 4 mm and graft of synthetic hydroxyapatite with a three months gap between the two surgical procedures. Six months after the second extraction with replacement of the root of the 21 element by an implant, four individual metal-free ceramic crowns were placed on the elements 12, 11, 21 and 22, two toothsupported (12, 22) and two implant-supported on custom abutments of zirconia (11, 21), which fully rehabilitated the function and esthetics of the patient with the regeneration and maintenance of bone level and gingival papillae between the elements, due to the strict respect of the biological distances between the individual parts, with monitoring and photographic, radiographic and tomographic documentation previously, during and after the surgery, twenty eight months after the installation of the implant of the 21 element and twenty-one months after the cementing of the four crowns. The authors and the patient signed the Free Informed Consent Form for the presentation of the case which was submitted in accordance with the standards of CONEP. (AU)
Os autores apresentam um caso clínico implantocirúrgico-protético completo em área estética com follow-up de dois anos de um paciente do sexo masculino, 50 anos de idade que inicialmente perdeu o elemento 11 por problema periodontal e, durante a fase dos provisórios nos elementos 12, 11, 21 e 22 teve o elemento 21 fraturado em acidente doméstico. As raízes dos elementos 11 e 21 sofreram exodontia e substituídas no mesmo ato por implantes osseointegráveis HE cônicos na medida de 18 X 4 mm e enxerto com hidroxiapatita sintética com interstício de três meses aproximadamente entre os dois procedimentos cirúrgicos. Seis meses após a segunda exodontia com substituição da raiz do 21 por implante, foram realizadas quatro coroas cerâmicas metal-free individuais nos elementos 12, 11, 21 e 22, sendo duas dento suportadas (12 e 22) e duas implanto-suportadas sobre abutments de zircônia personalizados (11 e 21), as quais reabilitaram plenamente a função e a estética do paciente com a regeneração e manutenção do nível ósseo e das papilas gengivais entre os elementos, graças ao estrito respeito às distâncias biológicas entre os elementos isolados, com acompanhamento e documentação fotográfica, radiográfica e tomográfica do período pré, trans e pós-operatório até a presente data, vinte e oito meses após a instalação do implante da região do 21 e vinte e um meses após a cimentação das quatro coroas cerâmicas. Os autores e o paciente assinaram o Termo de Consentimento Livre e Esclarecido (TCLE) para apresentação do caso o qual foi submetido de acordo com as normas da CONEP. (AU)
Subject(s)
Humans , Male , Middle Aged , Dental Implants , Tooth Fractures , Tooth SocketABSTRACT
Restorative treatment for patients with dental erosion requires an analysis of the degree of structural damage. Patients affected by moderate to severe dental erosion are particularly challenging because complex occlusal reconstruction will be needed. Ultrathin bonded occlusal veneers represent a conservative alternative to traditional onlays and complete coverage crowns for the treatment of severe erosion. This article describes a complete mouth rehabilitation with ultrathin computer-aided design and computer-aided manufacturing (CAD-CAM) composite resin occlusal veneers in a patient with a severely eroded dentition. In the maxillary anterior teeth, the bilaminar approach was chosen with lingual composite resin veneers and labial porcelain veneers. The main benefit of this approach is the possibility of using additive adhesive techniques, allowing only strategic reduction of sound dental structure or no preparation.
