CBCT can be a useful tool for assessing buccal bone volume along the implant.
Endodontically treated teeth are considered more susceptible to fracture because of the loss of tooth structure. The aim of this study was to evaluate the increase of resistance to fracture of upper bicuspids that underwent endodontic access and were restored with composite resin, with cuspal coverage. Forty extracted human maxillary premolars were divided in 4 groups: I--intact teeth; II--teeth with endodontic access and MOD preparation, restored with composite resin, without cuspal coverage; III--teeth with endodontic access, MOD preparation and occlusal reduction, restored with composite resin, with cuspal coverage; IV--teeth with endodontic access and MOD preparation, without any restoration. The test specimens were submitted to compression test up to their fracture. The test of Turkey and the ANOVA analysis were used to compare and test the results. The teeth from group III (with cuspal coverage) presented with significantly greater resistance to fracture, when compared with those from groups II (restored without cuspal coverage) and IV (not restored). The composite restoration with cuspal coverage can be considered an alternative for endodontically treated premolars.
Nos últimos anos pudemos observar um aumento na qualidade e na quantidade de restaurações de cerâmica pura. Este aumento se deve principalmente à superioridade estética que estas restaurações apresentam quando comparadas com as restaurações convencionais com base metálica. No entanto, é sabido que além do fator estético, a resistência e a adaptação marginal são, também, requisitos fundamentais para a longevidade e o sucesso das restaurações fixas. Diante disso, o objetivo desse trabalho foi realizar uma análise da literatura sobre a adaptação marginal dos principais sistemas de cerâmica pura. Após a avaliação dos trabalhos concluímos que a alta qualidade de adaptação marginal das restaurações é essencial para a saúde do órgão dentário e dos tecidos periodontais; e que em apenas dois trabalhos analisados, algumas restaurações de cerâmica pura não alcançaram alta qualidade de assentamento marginal, e, portanto, não estavam dentro dos limites de aceitabilidade clínica de 120μm.
Objective: The tensile strength effects on the sandblasting of the abutment associated with a cementing technique are not well documented. The objective of this study is to analyze the tensile strength of prosthetic crowns cemented on standard and sandblasted abutments, using a cementing technique. Methods: Experimental groups were formed according to cementing technique (control and practice abutment technique) and prosthetic abutment roughness (standard and sandblasted), totaling forty specimens. The crowns were cemented with Zinc Phosphate cement. Statistical analysis was conducted with an α at 0.05. Results: Considering the cementation techniques analysis, there were no statistically significant differences between the groups, with mean tensile strength values of 157.83±22.16 N for the control technique, and 159.95±46.40 N for the practice abutment technique on the standard surface. Result analysis of the control technique (626.23±34.80 N) and practice abutment technique (642.62±94.00 N) indicated no significant differences on the sandblasted surface. Considering the surface roughness analysis, significant differences were observed, with values of 157.83±22.16 N for the control technique/standard surface group and 626.23±34.80 N for the control technique/sandblasted surface group. Significant differences were observed in the practice abutment technique/standard surface group with 159.95±46.40 N values, compared to the 642.62±94.00 N value for the practice abutment technique/sandblasted group. Conclusions: The practice abutment cementing technique showed no significant differences with the control technique, regarding to the tensile strength, in the two surfaces (standard and sandblasted) used in the study. The sandblasting of prosthetic abutments led to a significant increase on the tensile strength considering the two studied cementation techniques.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.