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Previous issue date: 2013-08-15 / Complications and failures in implant supported fixed dentures (ISFD) can be related to several biological and mechanical factors, such as maximum bite force (MBF), design of the infrastructure, thickness of the aesthetic coating over metal framework and nocturnal bruxism. The aim of this case series study was to describe the failures of ISFD regarding the characteristics of aesthetic coating thickness, bite force and the presence of nocturnal bruxism. Seventeen patients who received ISFD were followed over a period of 6 to 12 months. Data were collected through anamnesis questionnaires, clinical examinations, MBF measurements and recording of the distribution of occlusal forces on the dental arch during centric and eccentric movements (protrusion and laterotrusion). The presence of bruxism was assessed by questionnaires, clinical examination and BiteStrip? device. Complications were observed in 4 patients, of which three individuals had avulsion of an artificial denture tooth while a small tooth fracture was located adjacent to the screw access hole in the other case. The findings suggest that failures caused by artificial tooth avulsion may have occurred mainly due to lack of internal retention provided by metal extensions of infrastructure. The fracture adjacent to the screw access hole was probably due to excessive opening on the resin tooth. Further studies with larger sample size and longer clinical follow-up are necessary to determine the possible risk factors for biomechanical failure of ISFD due to occlusal overload and / or design of the infrastructure. / Complica??es e falhas em pr?teses totais fixas implantossuportas (PTFI) podem estar relacionadas a fatores biol?gicos e mec?nicos, tais como for?a m?xima de mordida (FMM), desenho da infraestrutura met?lica, espessura do revestimento est?tico e presen?a de bruxismo noturno. O objetivo deste estudo de s?rie de casos foi descrever as falhas das PTFI em rela??o ?s caracter?sticas de espessura do revestimento est?tico, da for?a de mordida e da presen?a de bruxismo noturno. Foram acompanhados 17 pacientes que receberam PTFI durante um per?odo de 6 a 12 meses. Os dados foram coletados atrav?s de exame f?sico, anamnese, medi??o de FMM e registro da distribui??o de for?as oclusais na arcada dent?ria em posi??es c?ntrica e exc?ntricas (protrus?o e lateralidades). A presen?a de bruxismo foi avaliada atrav?s de question?rio, exame cl?nico e dispositivo BiteStrip?. Como resultado, foram observadas complica??es em 4 pacientes, dos quais tr?s indiv?duos tiveram avuls?o do dente da pr?tese e outro uma pequena fratura localizada adjacente ao orif?cio de acesso do parafuso em uma face dent?ria. Os achados sugerem que as falhas de avuls?o de dente artificial podem ter ocorrido principalmente devido a falta de reten??o interna proporcionada por pino da infraestrutura met?lica. J? a fratura adjacente ao orif?cio de acesso do parafuso provavelmente ocorreu devido a uma excessiva abertura na resina do dente. H? necessidade de estudos subsequentes com amplia??o da amostra e maior tempo de acompanhamento cl?nico para determinar os poss?veis fatores de risco para falhas biomec?nicas de PTFIs devido ? sobrecarga oclusal e/ou desenho da infraestrutura.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/1235 |
| Date | 15 August 2013 |
| Creators | Petri, Luciano Costa |
| Contributors | Shinkai, Rosemary Sadami Arai |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Odontologia, PUCRS, BR, Faculdade de Odontologia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -8096554818733665164, 500, 600, 4673435736271820140 |
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