Retention force of zirconia bar retained implant overdenture: Clinical comparative study between PEEK and plastic clips.

Abstract

Aim: This study aimed to evaluate and compare retention force of two implants retained mandibular overdenture with zirconia bar using two different clip materials.
 Methodology: 20 completely edentulous patients (8 women and 12 men) with age ranged between 45 and 65 years were selected for this study. All patients received conventional maxillary and mandibular complete dentures. Two implants were inserted bilaterally in the mandibular canine region. CAD-CAM fabricated zirconia bar attachment was used to retain mandibular overdentures. Patients were randomly divided into two equal groups where poly-oxy-methylene (POM) clip was used for Group I and poly-ether-ether-ketone (PEEK) clip for Group II. Retention force was measured at time of overdenture insertion (T0), six months (T6), and twelve months (T12) later.
 Results: significant difference was recorded between the two groups in initial retention forces (T0) where PEEK clip group recorded higher retention forces in comparison to POM clip group (P=0.029). However, insignificant difference was observed at (T6) and (T12). Within group comparison of mean retention values at different follow-up periods revealed significant difference for both groups.
 Conclusion:
 Within parameters of this study, it could be concluded that both POM and PEEK retentive clips can provide comparable retention forces when used with zirconia bar during 12 months period of overdenture use.
 
 How to cite this article: Emera RMK, Altonbary GY. Retention force of zirconia bar retained implant overdenture: Clinical comparative study between PEEK and plastic clips. Int Dent Res 2019;9(3):92-8.
 
 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

Patient satisfaction and masticatory performance of zirconia bar compared to cobalt chromium bar retaining mandibular implant overdenture: A crossover study

“…To evaluate patient experience, a questionnaire by Brennan et al was established with pre-coded answers in five-point Likert scale for each item; totally satisfied(=1),very satisfied(=2), satisfied(=3), unsatisfied(=4), not at all satisfied(=5). [19][20][21][22][23] (Figure 4).…”

“…16,17 Zirconia has high wear resistance, and low both thermal and electrical conductivity when compared to cobalt chromium (Co-Cr) or Gold. 18,19 The improved material strength, enhanced aesthetic and biocompatibility give zirconia great prospect to be used in a varied range of promising dental applications. It could be a material of choice for a bar attachment that is easy to process with CAD/CAM technology.…”

“… 15 The mechanical properties of zirconia fixed partial dentures (FPDs) were proved to be superior to other ceramics leading to their substantial applications in implant supported rehabilitations 16,17 . Zirconia has high wear resistance, and low both thermal and electrical conductivity when compared to cobalt chromium (Co‐Cr) or Gold 18,19 . The improved material strength, enhanced aesthetic and biocompatibility give zirconia great prospect to be used in a varied range of promising dental applications.…”

PEEK in dentistry, properties and application areas

“…Modified PEEK materials with ceramic fillers are preferred for temporary purposes in resin bonded fixed dental prosthesis(RBFDP) since they are more aesthetic in appearance compared to metal substructures (28). Similarly, veneered PEEK can be used as the interim framework of RBFDP in the anterior region as an alternative to materials such as metal-ceramic, glass infiltrated alumina, zirconia, and lithium disilicate (17).…”

“…Another disadvantage is that the bond strength is low during the veneering process with the composite since the wettability is insufficient (16). In addition, PEEK may be appropriate for individuals with metal allergies (17). It can also be reinforced with carbon or glass fibers and modified with nanoparticles (18).…”