ABSTRACT
Introdução: A perda da dimensão vertical associada com severa destruição dentária apresentam alterações intra e extrabucais significativas. Relato de caso: Este trabalho reporta um caso de reabilitação em paciente com severa perda de dimensão vertical resultante de desgaste dentário e inclinação vestibular dos dentes superiores. Conclusão: Casos como o apresentado neste trabalho, pela sua complexidade, necessitam de um planejamento detalhado, com o objetivo de devolver a função bucal e a integridade psicológica ao paciente
Subject(s)
Humans , Male , Middle Aged , Dental Occlusion , Dental Prosthesis , Jaw, Edentulous, Partially , Mouth Rehabilitation , Tooth Loss , Vertical DimensionABSTRACT
Several authors still consider the mechanical problems of fracture and component loosening as the main causes of failure of implant-supported restorations. The purpose of this in vitro study was to compare the preload of three types of screw for transmucosal abutment attachment used in single implant-supported prosthesis through strain gauge and removal torque measurements. Three external hex fixtures were used, and each received a transmucosal abutment (Cera One), which was fixed to the implant with its respective screw: Group A- gold screw, Group B- titanium screw and Group C- surface-treated titanium screw (Ti-Tite). Ten screws of each type were attached applying a 30.07+/-0.28 Ncm torque force and maintained in position for 5 minutes. After this, the preload values were measured using strain gauges and a measurement cell. Gold screws presented higher preload values (131.72+/-8.98 N), followed by surface-treated titanium screws (97.78+/-4.68 N) and titanium screws (37.03+/-5.69 N). ANOVA (p<0.05) and Tukey's test (p<0.05) were applied. Statistically significant differences were found among the groups for both preload and removal torque values. In conclusion, gold screws may be indicated to achieve superior longevity of the abutment-implant connection and, consequently, prosthetic restoration due to greater preload values yielded.
Subject(s)
Dental Abutments , Dental Implants, Single-Tooth , Dental Prosthesis Design , Coated Materials, Biocompatible/chemistry , Dental Materials/chemistry , Dental Prosthesis Retention , Dental Prosthesis, Implant-Supported , Dental Restoration Failure , Gold Alloys/chemistry , Humans , Materials Testing , Stress, Mechanical , Time Factors , Titanium/chemistry , TorqueABSTRACT
Several authors still consider the mechanical problems of fracture and component loosening as the main causes of failure of implant-supported restorations. The purpose of this in vitro study was to compare the preload of three types of screw for transmucosal abutment attachment used in single implant-supported prosthesis through strain gauge and removal torque measurements. Three external hex fixtures were used, and each received a transmucosal abutment (Cera One®), which was fixed to the implant with its respective screw: Group A- gold screw, Group B- titanium screw and Group C- surface-treated titanium screw (Ti-Tite®). Ten screws of each type were attached applying a 30.07±0.28 Ncm torque force and maintained in position for 5 minutes. After this, the preload values were measured using strain gauges and a measurement cell. Gold screws presented higher preload values (131.72±8.98 N), followed by surface-treated titanium screws (97.78±4.68 N) and titanium screws (37.03±5.69 N). ANOVA (p<0.05) and Tukey's test (p<0.05) were applied. Statistically significant differences were found among the groups for both preload and removal torque values. In conclusion, gold screws may be indicated to achieve superior longevity of the abutment-implant connection and, consequently, prosthetic restoration due to greater preload values yielded.
Subject(s)
Humans , Dental Abutments , Dental Implants, Single-Tooth , Dental Prosthesis Design , Coated Materials, Biocompatible/chemistry , Dental Prosthesis Retention , Dental Prosthesis, Implant-Supported , Dental Restoration Failure , Dental Materials/chemistry , Gold Alloys/chemistry , Materials Testing , Stress, Mechanical , Time Factors , Torque , Titanium/chemistryABSTRACT
Em virtude da freqüência cada vez maior de reabilitações implanto-suportadas, e de que esta modalidade de tratamento vem se mostrando extremamente eficaz na resolução de várias situações clínicas, foi realizada esta revisão literária com o objetivo de ressaltar questões relacionadas à passividade da estrutura metálica em próteses fixas sobre implantes. São descritos aspectos e alternativas relacionadas a alterações ósseas, assim como procedimentos clínicos e laboratoriais que podem influenciar na passividade de estruturas metálicas, esta que talvez seja o fator mais importante na determinação da longevidade tanto da restauração protética quanto dos implantes
Subject(s)
Dental Implants , Dental Prosthesis, Implant-Supported , Dental SolderingABSTRACT
Os autores descrevem duas técnicas que permitem isolamento adequado para a realização do tratamento endodôntico em dentes extremamente destruídos, utilizando restaurações provisórias com agulhas hipodérmicas e coroas metálicas que possibilitam o acesso para a endodontia
