Do implant‐retained mandibular overdentures maintain radiographic, functional, and patient‐centered outcomes after 3 years of loading?

Abstract

Objectives: Analyzing whether radiographic, functional, and oral health-related quality of life (OHRQoL) outcomes are maintained over 3 years of implant-retained mandibular overdenture (IMO) function and investigating the bite force associations in the 3rd year of function. Material and methods: A longitudinal clinical study in which 24 IMO users were evaluated during a 3-year follow-up period. Patients' posterior area index, masticatory function, OHRQoL and bite force were assessed. The masticatory function parameter ST_X50 reflects the opening through which 50% of the crushed particles would pass, ST_B describes the homogeneity of the bolus, and the masticatory efficiency parameters ME_5.6 and ME_2.8 represent the % of material retained in the 5.6 and 2.8 mm sieves, respectively. Results: A significant increase in posterior area index (p ≤ .01) was found in all evaluated periods. Minor deteriorations in ST_X50 (p ≤ .01) and ME_5.6 (p ≤ .01) between the 2nd and the 3rd year coincided with improvements in ST_B (p ≤ .01), number of cycles (p ≤ .01), and cycle time (p = .02). The global OHIP-Edent score (p = .02) and the scores in the functional limitation (p = .02), psychological discomfort (p ≤ .01), and handicap domains (p ≤ .01) increased significantly between the 2nd and the 3rd year. Correlations between bite force and cycle time (p = .03) and between posterior area index and ST_X50 (p ≤ .01) and ME_2.8 (p = .02) were also found. Conclusion: Changes in posterior area index, masticatory function, and OHRQoL are still ongoing during the 3rd year of IMO function. Bite force and posterior area index influence the masticatory function outcomes in the 3rd year of IMO function.

Immediate loading of dental implants in edentulous mandibles using Locator attachments or Dolder bars: A 9‐year prospective randomized clinical study

“…Mukilvannan et al (2021) reported higher OHIP scores and satisfaction of edentulous patients treated with two‐implant mandibular overdentures and this positive effect did not change 8–10 years after treatment. In contrast, Possebon et al (2020) showed that patient satisfaction with their dentures began to decrease 3 years after the dentures were fitted, possibly because of declining mucosal support in the posterior region. Another study showed that OHIP scores and implant stability improved from 1 year after the start of loading until 4 years after the start of loading, but then worsened in the fifth year of follow‐up.…”

Implant-Supported Overdentures: Current Status and Preclinical Testing of a Novel Attachment System

“…While not yet constituting the standard of care [1] in all countries, implant-retained removable prostheses have been shown to have a positive effect on functional and patientcentered outcomes [2][3][4]. In this context, a large body of literature comparing various implant and attachment configurations [5] does exist, at least partially reporting contradictory results.…”

Prosthetic complications and quality of life among wearers of mandibular overdenture with the Facility-Equator system

“…3 This system is intended for use in mandibles with limited bone availability. Several aspects of Equator attachments used as MO retainers have been studied, such as their relationship with quality of life, masticatory function, 4,5 clinical periimplant, and biological aspects, 6,7 and performance according to loading protocols. 8 However, little is currently known about the profile of complications and prosthetic events that may be related to the Facility-Equator system, and these data are essential for patients and clinicians as they permit to develop a more holistic prognostic measure that helps in the selection of implant systems.…”