ABSTRACT
PURPOSE: The aim of this study was to evaluate the effects of abutment diameter, cement type, and re-cementation on the retention of implant-supported CAD/CAM metal copings over short abutments. MATERIALS AND METHODS: Sixty abutments with two different diameters, the height of which was reduced to 3 mm, were vertically mounted in acrylic resin blocks with matching implant analogues. The specimens were divided into 2 diameter groups: 4.5 mm and 5.5 mm (n=30). For each abutment a CAD/CAM metal coping was manufactured, with an occlusal loop. Each group was sub-divided into 3 sub-groups (n=10). In each subgroup, a different cement type was used: resin-modified glass-ionomer, resin cement and zinc-oxide-eugenol. After incubation and thermocycling, the removal force was measured using a universal testing machine at a cross-head speed of 0.5 mm/min. In zinc-oxide-eugenol group, after removal of the coping, the cement remnants were completely cleaned and the copings were re-cemented with resin cement and re-tested. Two-way ANOVA, post hoc Tukey tests, and paired t-test were used to analyze data (α=.05). RESULTS: The highest pulling force was registered in the resin cement group (414.8 N), followed by the re-cementation group (380.5 N). Increasing the diameter improved the retention significantly (P=.006). The difference in retention between the cemented and recemented copings was not statistically significant (P=.40). CONCLUSION: Resin cement provided retention almost twice as strong as that of the RMGI. Increasing the abutment diameter improved retention significantly. Re-cementation with resin cement did not exhibit any difference from the initial cementation with resin cement.
Subject(s)
Cementation , Dental Cements , Resin CementsABSTRACT
Las restauraciones implantosoportadas son un tratamiento exitoso para el reemplazo de los dientes perdidos por diversas causas. No obstante, este tipo de tratamiento puede presentar complicaciones. Las complicaciones protésicas pueden poner en riesgo nuestro tratamiento restaurador, por lo tanto, el odontólogo debe estar en la capacidad de diagnosticar las diferentes complicaciones protésicas e indicar el tratamiento adecuado. También, se debe prevenir la ocurrencia de las complicaciones con una adecuada selección y planificación del caso y educar al paciente para que acuda a las citas de mantenimiento de su tratamiento con este tipo de restauraciones
Implant-supported restorations are successful treatment for replacing missing teeth, due to many reasons. However, this treatment can have some complications. These prosthetic complications can jeopardize the restorative's treatment. Therefore, dentists must be able to diagnose different prosthetic complications and indicate an appropriate treatment. Although, dentists should prevent the appearance of complications with a proper selection of the case and pertinent case planning. The patient's education in order to assist to maintenance's appointment is important for success of the treatment
Subject(s)
Humans , Male , Female , Dental Implants , Metal Ceramic Alloys , Prosthesis Failure , Dental ImplantationABSTRACT
Las restauraciones con implantes dentales oseointegrados cada vez se utilizan con mayor frecuencia. Este tipo de restauraciones han mostrado un alto porcentaje de éxito. Sin embargo, las mismas pueden presentar complicaciones. Las complicaciones biológicas pueden poner en riesgo nuestro tratamiento restaurador, por tanto debemos estar en capacidad de diagnosticar las diferentes condiciones periimplantares y referir al especialista en el área cuando sea necesario. También, debemos prevenir la ocurrencia de las complicaciones y educar al paciente para que realice un mantenimiento correcto de las restauraciones implantosoportadas
Osseintegrated dental implants restorations are being used more frequently over the years. These restorations have shown high success rate. However, they may have biological complications, which could jeopardize the restorative's treatment. Therefore, dentists must be able to diagnose different periimplantals conditions and refer it to specialists in the area, when is required. Although, dentist must prevent the appearance of complications and educating their patients on the correct maintenance of implant-supported restorations