RESUMO
A osseointegração é, sem sombra de dúvida, a responsável pelo notável avanço tecnológico, mudança deconceitos filosóficos e condução de planejamentos voltados à reabilitação oral, como também, pela disseminaçãoe propagação dos conhecimentos, interferindo sobremaneira nas demais áreas da Odontologia contemporânea.Os implantes osseointegrados são cada vez mais utilizados para substituir dentes perdidos em várias situações, desde a perda de um único dente até em casos de completo edentulismo. A reabilitação de pacientes desdentados com próteses fixas ou overdentures removíveis é um processo complexo e desafiador. Existem fatores cruciais para a decisão de uma prótese fixa ou removível para se obter estética, fonética, promover conforto e função. Além disso, o resultado do tratamento está relacionado à taxa de sobrevivência dos implantes, à manutenção do osso marginal, à saúde do tecido periimplantar, à longevidade dos componentes protéticos e da prótese em si. Esse estudo buscou analisar as vantagens e desvantagens das reabilitações protéticas sobre implantes, fixas e removíveis, para pacientes totalmente desdentados.
Doubtless, osseointegration is the major responsible for the remarkable technological advance, changing philosophical concepts and guiding treatment plans related to oral rehabilitation. It also contributes to knowledge spread and diffusion, interfering in other areas of contemporary dentistry. Osseointegrated implants are widelyused to replace lost teeth in many situations, since the loss of a single tooth to completely edentulous archcases. Rehabilitation of edentulous patients by using fixed or removable implant-supported prostheses is a complex and challenging procedure. There are crucial factors involved at the decision of whether fixed or removable implant prosthesis should be planned to acquire optimal esthetics, phonetics, comfort, and function. In addition, the treatment result is related to implant survival, crest bone loss, soft tissue health, prosthesis's components longevity and prosthesis longevity itself. The aim of the present study is analyze the advantages and disadvantages of prosthetic rehabilitation of completely edentulous patients with fixed or removable implants.
Assuntos
Arcada Edêntula/diagnóstico , Implantes Dentários , Prótese TotalRESUMO
Animal teeth are routinely used in studies that test dental materials; however, no studies have yet proposed the use of swine teeth in laboratory tests. The purpose of this study was to compare the effects of acid etching on the dentine and enamel of human and swine teeth, aiming at the use of swine teeth as substitutes for human teeth in adhesion tests. Four human molars and four swine molars free of caries were used. For the study of enamel, two human and two swine teeth were longitudinally sectioned with a dental handpiece and a carborundum disk. For evaluation of dentine, the remaining teeth had the occlusal third of their crowns removed using a low speed diamond saw. All specimens underwent acid etching with 37% phosphoric acid for 30s. The etched surfaces were then washed with air/water spray for 10s. The specimens were then prepared for analysis in a Sterioscan 440 scanning electron microscope. It was observed a similar morphology in human and swine teeth, despite swine enamel was thinner than human enamel. Acid etching of swine enamel promoted a demineralization similar to that observed in human enamel in which the three types of Silverstone's patterns were observed. Acid etching of dentine exposed the opening of dentinal tubules in both swine and human teeth. Peritubular dentine was removed by phosphoric acid, while collagen fibrils appeared discernible in intertubular dentine. Thus, this study showed that enamel and dentine from swine and human teeth share many structural similarities after acid etching.
