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The International Journal of Oral & Maxillofacial Implants
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Int J Oral Maxillofac Implants 26 (2011), No. 6     15. Dec. 2011
Int J Oral Maxillofac Implants 26 (2011), No. 6  (15.12.2011)

Page 1296-1302, PubMed:22167436


Immediate Loading of Unsplinted Implants in the Anterior Mandible for Overdentures: 3-Year Results
Roe, Phillip / Kan, Joseph Y. K. / Rungcharassaeng, Kitichai / Lozada, Jaime L.
Purpose: This 3-year study evaluated the implant survival rate, peri-implant tissue response, prosthetic maintenance, and prosthetic complications in a series of patients who received two immediately loaded unsplinted threaded implants to retain a mandibular overdenture.
Materials and Methods: Eight completely edentulous patients were evaluated clinically and radiographically immediately after implant placement, at 3 months, and at 1, 2, and 3 years after implant placement. Data were analyzed using repeated-measures one-way analysis of variance and the Wilcoxon signed rank test at a significance level of α = .05.
Results: At 3 years, all implants remained osseointegrated (16/16), with an overall mean marginal bone change of -0.58 ± 0.39 mm and a mean Periotest value of -7.19 ± 0.54. The modified Plaque Index scores showed marked improvement in oral hygiene during the first year, but some relapse was observed thereafter. Prosthetic maintenance and complications included replacement of the attachment inserts, abutment loosening, dislodgement of the attachment housing, overdenture reline, denture tooth fracture, and overdenture base fracture.
Conclusions: This 3-year study suggests that, despite less than ideal oral hygiene and a high incidence of complete/partial fracture of overdentures, favorable implant survival rate and peri-implant tissue responses can be achieved in mandibular overdentures retained with two immediately loaded unsplinted threaded implants.

Keywords: immediate loading, implant-retained prosthesis, mandibular overdenture, prosthetic attachments, prosthetic complications, prosthetic maintenance, unsplinted implants