Assessment of masticatory function of mandibular implant-supported overdenture wearers: A 3-year prospective study

Khalid, Taimur and Yunus, Norsiah and Ibrahim, Norliza and Mohd Saleh, Nosizana and Goode, David and Masood, Mohd (2020) Assessment of masticatory function of mandibular implant-supported overdenture wearers: A 3-year prospective study. Journal of Prosthetic Dentistry, 124 (6). pp. 674-681. ISSN 00223913, DOI

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Statement of problem. Wearers of mandibular complete dentures (CDs) often complain of retention and stability problems resulting in poor masticatory function. Evidence suggests that a mandibular overdenture (MOD) stabilized by 2 implants represents the treatment of choice to improve stability and masticatory function. Measurements are needed of the improvement in masticatory function after providing mandibular implant-stabilized overdentures. Purpose. The purpose of this prospective clinical study was to evaluate the changes in masticatory function from baseline (T0) to 3 months (T1) and 3 years (T2) in participants with MODs and to assess the effect of baseline mandibular bone height and volume on masticatory function after 3 years. Material and methods. Participants were assessed for masticatory function by using masticatory performance involving paraffin wax cubes as an objective measure and by using masticatory ability involving a questionnaire as a subjective measure. Edentulous individuals presenting for replacement dentures were provided with conventional mucosa-supported prostheses and evaluated for masticatory function after a 3-month settling-in period (baseline measure). Before implant placement, baseline measures of bone height and volume were recorded from cone beam computed tomography (CBCT) images. The prostheses were then converted to implant-stabilized mandibular overdentures while any maxillary prostheses remained supported by the mucosa. Masticatory function was reassessed at 3 months and 3 years after insertion of the mandibular overdentures, and the mean changes from baseline were analyzed with the Wilcoxon signed-rank test. The effect of variables on masticatory function was determined by using multivariate linear regression analyses. Results. A total of 23 participants were included in the study, with only 1 participant not completing the 3-year assessment. Significant improvement was observed in the masticatory performance (mixing ability index) (P<.01) and masticatory ability score (P<.001) from baseline to 3 months and baseline to 3 years. Bone height and volume had no significant effect on the improvement of masticatory function after conversion to an implant-stabilized mandibular overdenture. Conclusions. Masticatory function significantly improved after 3 months and was maintained over 3 years in participants with implant-stabilized mandibular overdentures. However, baseline bone height and volume had no significant effect on these changes in masticatory function after 3 years

Item Type: Article
Uncontrolled Keywords: Dental Implants; Dental Prosthesis, Implant-Supported; Denture, Complete, Lower; Denture, Overlay; Humans; Mandible; Mastication; Patient satisfaction; Prospective studies
Subjects: R Medicine > RK Dentistry
R Medicine > RK Dentistry > Oral surger
Divisions: Faculty of Dentistry
Faculty of Dentistry > Dept of Oral & Maxillofacial Surgery
Depositing User: Ms Zaharah Ramly
Date Deposited: 29 Nov 2023 03:31
Last Modified: 29 Nov 2023 03:31

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