Quality of Life Evaluation in Titanium/Peek Andtitanium/Co-Crdouble Crown Systemin Implant- Retained Mandibular Overdenture (Randomized Controlled Trial)

Abstract

Background and Objective: This study was designed to evaluate the impact of double crown system
with either titanium/PEEKor titanium/Co-Cr combination on oral and general health related quality of life
(OHRQoL) in patients with completely edentulous mandible.
Materials and Method: Participating patients received new complete dentures and then received two
mandibular interforaminal implants. Patients were randomly dividedinto two equal groups. For patients of
group (A) the secondary crowns of the telescopic overdenture were made of PEEK material, while those
of group (B) the secondary were made of Co-Cr material. Questionnaires were used to assess OHRQoL
(OHIP-EDENT).
Results: The study was conducted on 18 healthy completely edentulous patients. Patients were recalled
two weeks after final dentures insertion, 3m, 6m, 9m and 12m. The results showed that both materials have
improved the oral health related quality of life, however there was a non-significant difference between the
two groups.
Conclusion: Double crown systems, with either titanium/Peek combination or titanium/Co-Cr combination,
have the same impact on oral and general health related quality of life when used for treating patients with
completely edentulous mandibles.