RESUMO
The success of complex prosthodontic treatment is believed to be conditioned by condylar path replication in the articulator, as there is a continuing debate in the scientific community regarding the anatomical relationship between joint and dental morphology. The purpose of this study was to investigate the potential correlation between incisal and condylar guidance. The study population consisted of 20-30-year-old full dentate individuals with Angle class 1 occlusion, whose cone-beam computed tomography (CBCT) scans were analyzed by two investigators. The anterior slope of the right and left glenoid fossa angle and the palatal slope of all maxillary frontal teeth were measured by software tools at three defined landmarks, and the mean values were calculated. Statistical analysis was performed using IBM SPSS Statistics software (version 19.0), and the Pearson r coefficient test was used to assess correlations. The results reveal a highly statistically significant correlation between median condylar slopes and between median incisal slopes of the anterior teeth, on the left and right side, in the three standard areas (p<0.01). However, no significant correlation was found between the condylar slopes and the incisal slopes of the anterior teeth (p>0.01) in class 1 Angle subjects. In conclusion, this study did not provide evidence to support the existence of a significant correlation between incisal and condylar guidance in the population under investigation.
RESUMO
A fully digital technique for retrofitting a new crown to a removable partial denture (RPD) is presented. The conventional crown preparation was followed by intraoral scanning of the preparation, the antagonists, and the occlusal relationship and by scanning the RPD both in situ and outside the oral cavity. All the standard tessellation language (STL) files were indexed in a design software program, and the new crown was designed. After conventional dynamic adaptation against the antagonist teeth in the software program, the existing RPD was designated as the antagonist cast, and a second regular static adaptation was performed. This straightforward approach produced a crown which fit the occlusal rest and reciprocating arm without sending the existing prosthesis to the dental laboratory.
RESUMO
Objectives: The present study aims to identify the current level of clinical and technological performance of dental prosthetic rehabilitation on implants and the possible existence of correlations between different designs and occurring complications in Romanian practice. Material and method: An online questionnaire with 36 questions, grouped into five sections, has been designed using the Google Forms application. In 2019, it was approved by the Romanian Dental and Maxillofacial Prosthetic Society, and the link to the questionnaire was distributed via email to 70 members. The answers with multiple choice option were summarized in an Excel document, coded and statistically processed in the specific software (SPSS v20.0; IBM Corp). Fisher's exact test, likelihood ratio and linearby- linear association were used, and pairs of two questions were tested considering a standard statistical significance p value=0.05. Results: The results show that screwed rehabilitations (80.5%) on platform switched (70.9%) bone level implant (76.4%) with multiunit (69.1%) abutments for fixed total prosthesis, and custom abutments (43.6%) for removable prosthesis are preferred in Romanian practice. Most common problems of fixed rehabilitation on implants are related to aesthetics (65.5%) and for overdenture to unscrewing (56.4%). Resin-polymerized material in the laboratory, acrylic teeth and milled metallic structure in both arches was the preferred design for fixed restauration in both arches. Multiple statistic significant correlations (p<0.05) were found between the design type and complications. Conclusions: Our findings outline current clinical and technological preferences in Romanian practice on prosthetic implant rehabilitations, illustrating a great need for further research and education consensus.
