Conventional and digital record maxillary occlusal for the manufacture of complete-arch implant-supported fixed protheses: controlled and randomized clinical trial

Abstract

Objectives. Evaluate the precision of the digital record maxillary oclusal, compared to the conventional one for the manufacture of complete-arch implant-supported fixed protheses. Materials and methods. 20 participants were included who used a mandibular interim complete-arch fixed prosthesis and conventional complete dentures maxillar. The participants were randomized between two types of record maxillary oclusal: conventional (CMR) and digital (DMR). With the prostheses finished, the distribution of occlusal contact points was evaluated, number of occlusal contact points, time to obtain the record maxillary occlusal and work cast. A descriptive analysis to evaluate the distribution of occlusal contact points, Wilcoxon test for the number of occlusal contact points and Mann-Whitney test for the time taken to obtain the working casts and record maxillary oclusal, and occlusal adjustment time (p<0.05). Results. There was a similarity between the relation records methods regarding the distribution of occlusal contact points. There was no difference in the number of occlusal contact points on the anterior (p=0.439) and posterior (p=0.227) teeth. No relationship was observed between the distribution and amount of occlusal contact points (CMR: p=0.288 / DMR: p=0.183). CMR requires less working time (p=0.000). The CMR method took more occlusal adjustment time (p=0.008). Conclusion. The DMR used may be an option to obtain the functional space necessary for the assembly of teeth in complete-arch implant-supported fixed protheses. However, it requires more working time. Clinical Relevance. The DMR can be a clinical option for capturing the functional space for the assembly of teeth in complete-arch implant-supported fixed protheses.