ABSTRACT

Purpose: to investigate outcomes of Poly ether-ether ketone veneered with composite and porcelain fused to metal Full arch fixed screw retained prosthesis for patients with atrophied mandibular ridges.

Material and methods: Eight (4 men and 4 women) edentulous patients complaining from mandibular ridge atrophy were randomly assigned into 2 groups; Group I included 4 patients who received 8 implants and porcelain fused to metal full arch fixed restoration, Group II included 4 patients who received 8 implants and Poly ether-ether (PEEK) fixed restoration veneered with composite resin teeth. All implants were inserted using computer guided flapless surgical approach and loaded by definitive restorations after 3 months of osseointegration. Clinical (plaque and gingival index, probing depth, implant stability) and radiographical (bone resorption using cone beam CT) evaluations were performed at time of prosthesis insertion, after 6 month and one year thereafter.

Results: The survival was 90.7% and 100% in group I and group II respectively. Plaque and gingival indices increased with time in metal group only and PEEK group showed significant lower plaque and gingival indices than metal group after 6 and 12 months. Probing depth and bone resorption showed an increase values with passage of time in both groups and PEEK group showed significant lower probing depths and bone losses than metal group. Implant stability did not differ between groups or observation times was noted

Conclusion: Within limitations short term randomized trial, it could be concluded that Poly ether-ether ketone veneered with composite full arch fixed screw retained prosthesis is advantageous than porcelain/metal restoration for patients with atrophied mandibular ridges as it showed favourable per-implant tissue health after one 12 months.