الفهرس | Only 14 pages are availabe for public view |
Abstract This in-vitro comparative study was conducted to evaluate the effect of using different attachment systems (Novaloc& Equator) on stress distribution around implants in implant supported prostheses. Using a mandibular 3D-printed cast model from the epoxy resin after selection of the implant sites, surrounded by four channels of estimated depth, to allow a 2mm thickness of epoxy resin between the strain gauge rosettes and the implant. Two implants were inserted parallel to their sites in the 3D-printed model, and attachment were screwed. Sixteen attachments divided into two groups (n=8/group). group A: Eight Novaloc attachments. group B: Eight Equator attachments. A Mandibular cast of edentulous patient scanned and designed using (exocad valeta 3.0) with 3d printing material (HARZ labs). Two implant beds were designed, and holes were designed at the mesial, distal, buccal and lingual aspect of each implant to receive the strain gauges. A key index with 2 mm thickness and 2 mm offset with tissue stops was designed for the purpose of creating a space for the mucosa simulator representing the future mucosa. Strain gauges were cemented around the Summary & Conclusion 84 implants to measure the micro strain. The load was applied using a universal testing machine, and stress analysis was made. Results were collected and analyzed. Conclusion: Within the limitations of this in-vitro study and based on its results, there was a statistically significant difference. It was concluded that: - Both Novaloc and Equator attachments are less traumatic to underlying bone in implant supported overdenture, with Novaloc attachment being less traumatic under oblique loading than Equator attachment |