STUDY OBJECTIVES AND METHODS
The aim of this study was to report the incidence of prosthetic complications and maintenance events after treatment with mandibular overdenture retained by four mini implants opposed to a maxillary denture. Implant intervention included flapless or flapped surgery combined with immediate or delayed loading, as part of a randomized clinical trial. Four one-piece titanium-zirconium mini-implants (Straumann Mini Implant System) were inserted, and the retentive PEEK elements (Optiloc) were incorporated into the overdenture using chairside procedures. Prosthodontic complications and maintenance events were recorded over a 2-year follow-up, and the final outcome was defined according to standardized criteria. Data analysis included descriptive statistics, incidence and incidence density rates, and Kaplan-Meier survival.
RESULTS
- 73 out of 74 patients (64.9 % female), mean age of 64 (SD=8.2) years, completed the study follow-up (one withdrew after 9 months).
- Implant survival was 100 %. A total of 163 prosthodontic events occurred in 53 patients (72.6 %), and 20 patients had no clinical complaints or maintenance needs.
- The most common procedures were adjustment/repair of the overdenture base (47.0 %), replacement of retentive inserts (19.8 %), and laboratory relining (12.9 %).
- A high prosthodontic success rate was achieved (93.2 %), and all patients presented serviceable overdentures and continuous use after the resolution of prosthodontic complications.
- The incidences of matrix replacement and laboratory relines were low in the first year, while denture base adjustments were common within the first year, especially in the first 6 months.
CONCLUSIONS
The mini implant system showed high prosthodontic success rates. Minor adjustments/repairs during the initial follow-up were common. Relines and matrix replacements tend to occur after one year of overdenture use, and matrix replacements may occur as a consequence of the need for relining.
Adapted from J Rodrigues Silvaet al., J Dent. 2024 Oct:149:105266, for more info about this publication, click HERE
This review is part of the Straumann "Scientific Highlights Newsletter 6/24"
Other highlights of this issue:
- Osseointegration of anodized vs. sandblasted implant surfaces in a guided bone regeneration acute dehiscence-type defect: An in vivo experimental mandibular minipig model
- Reconstructive surgical treatment of peri-implantitis with use of a chitosan brush for decontamination- case series with 1-year follow-up
- Implant Stability After Graftless Motor-Driven Crestal Sinus Elevation: A Cohort Study
- Influence of implant diameter on accuracy of static implant guided surgery: An in vitro study
- Intraoral scanning for implant-supported complete-arch fixed dental prostheses (ISCFDPs): Four clinical reports
- Advances in osteoimmunomodulation of biomaterials after intrabone implantation: focus on surface hydrophilicity