Marginal bone resorption around immediate and delayed loaded implants supporting a locator‐retained mandibular overdenture. A 1‐year randomised controlled trial

Abstract

The aim of this 1-year study was to evaluate and compare crestal bone loss and clinical outcomes of immediate and delayed loaded implants supporting mandibular overdentures with Locator attachments. In a randomised controlled clinical trial, 36 completely edentulous patients (mean age 59.6 years) who desired to improve the stability of their mandibular dentures were randomly assigned into two groups. Each patient received two implants in the canine area of the mandible after a minimal flap reflection. Implants were loaded by mandibular overdentures either 3 months (delayed loading group, G1) or the same day (immediate loading group, G2) after implant placement. Locator attachments were used to retain all overdentures to the implants. Peri-implant vertical (VBL) and horizontal (HBLO) bone losses and clinical parameters [plaque scores (PI), gingival scores (GI), probing depths (PD) and implant stability (ISQ)] were assessed at time of overdenture insertion (T0), 6 months (T6) and 12 months (T12) after overdenture insertion. After 12 months of overdenture insertion, two implants (5.5%) failed in G2. Vertical bone loss was significantly higher in G2 compared with G1, while HBLO demonstrated insignificant differences between groups. All clinical parameters (PI, GI, PD and ISQ) did not differ significantly between groups. Vertical bone loss was significantly correlated with PD and HBLO. Immediately loaded two implants supporting a Locator-retained mandibular overdenture are associated with more vertical bone resorption when compared to delayed loaded implants after 1 year. Clinical outcomes do not differ significantly between loading protocols.

Relationship between implant stability on the abutment and platform level by means of resonance frequency analysis: A cross-sectional study

“…Some articles have reported the comparison between the ISQ measured on the abutment and the value measured directly on the implant platform [23–27]. In the present study, the log-linear marginal regression indicated that each unit increased in the square root of the smartpeg height, tended to decrease about 12% the mean ISQ value.…”

One‐year clinical outcomes of locking taper Equator attachments retaining mandibular overdentures to narrow diameter implants

“…The clinical findings reported in the present study, with a success rate of 83.3% for NDI connected to locking taper stud abutments as MO retainers, demonstrate a stable clinical behavior after the osseointegration period. However, some studies showed a significant increase in the peri-implant health indices over time 16,35,36. The evaluations of the PI, GI, and calculus index in our study indicate that higher values for these indices occur during osseointegration.…”

Bone morphogenetic protein effect on implant stability and bone height in immediately loaded implant supported mandibular overdenture (randomized clinical trial)

“…This crestal bone loss was in the normal range documented with immediately loaded implant overdentures. [10] This bone loss may be attributed to immediate bone response to healing and reorganization combined with function stresses in addition. [11] In the conventional titanium, dental implant group had shown higher mean values of bone loss along the study period Ragheb, et al…”