Influence of the axial inclination of root-form dental implants on their impression accuracy: comparative study of two types of implants
Abstract
Introduction: The use of dental implants is becoming increasingly popular in the restoration of edentulous and partially dentate jaws, particularly in cases where there has been limited success with conventional techniques. Several impression techniques have been advocated to achieve a definitive cast, that will affect the passive fit of an implant-supported prosthesis. The purpose of the present study was to investigate the effect of implant impression technique (open and closed tray), implant axial angulation and implant head type (internal octagon and external hexagon) on the implant impression accuracy. Method and materials: Impressions of sixteen implants (8 internal octagon and 8 external hexagon) were taken with a specially designed and constructed impression device with two techniques (open and closed trays). Measurements of impression distortion were obtained directly from the impression using a coordinate measuring machine (CMM). Results and Conclusion: Within the limitations ...
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