Retention Evaluation of PEEK Telescopic Attachment in Two Implants Supported Palateless Maxillary Overdenture. An In-vitro Study

Volume 7 , Issue 2 , December 2020 , Pages 1-8

Authors

Balen H. Qadir 1 ; Kawan S. Othman 1

1 Department of Prosthodontics, College of Dentistry, Sulaimani University, Sulaimani, Iraq.

DOI logo 10.17656/sdj.10110

Keywords

Abstract

Objective: The aim of this study is to evaluate the effect of different positions of two dental implants with polyether ether ketone
(PEEK) telescopic attachment on the Retention of palateless maxillary overdenture.
Methods: Three edentulous maxillary models were fabricated from cold-cure polymethyl methacrylate resin. Each Model has received
two implants as follows: Model 1 (one in each canine region), Model 2 (in right canine and left first premolar area), and Model 3 (in
right canine and left second premolar area). One Palateless maxillary denture was constructed over each Model. Ready-made PEEK
telescope attachments corresponding to implant abutments were embedded in the inner surface of these overdentures. Initial anterior,
posterior, and central retention values of overdentures were estimated and compared with the Retention after 540 cycles of insertion
and removal using a digital force gauge.
Results: The highest initial anterior retention value was recorded with Model 1, followed by Model 2 and then Model 3 (8.080, 7.460,
and 6.980 N), respectively. On the other hand, the highest posterior and central retention values were recorded for Model 3 (11.060
and 10.680 N), and the lowest value was with Model 1 (9.18 and 9.660 N). The highest loss of secondary retention value was recorded
with central retention value (24%), then anterior retention value (19%), and the lowest was recorded with posterior retention value
(13%).
Conclusions: The implant location and distribution affect the retention value of palateless maxillary overdenture. Continuous insertion
and removal of the prosthesis for daily hygiene practice lead to decreases in the retention values. 

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  • Published at1 December 2020

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