One-Year Multicenter Prospective Evaluation of Survival Rates and Bone Resorption in One-Piece Implants

Clin Implant Dent Relat Res. 2016 Apr;18(2):392-400. doi: 10.1111/cid.12299. Epub 2015 Feb 25.


Background: Several studies have reported the efficiency of immediate loading techniques.

Purpose: The aim of this multicenter prospective study was to evaluate the clinical efficiency of the one-piece screw (OPS) implants used by general dentists.

Materials and methods: A total of 272 patients were treated with 533 implants at five dental clinics by five general dentists. Some implants were provided with provisional restoration. Implants in partially edentulous spaces were splinted with acryl, composite, and intraoral welding. The implant survival rates, bone resorption, plaque accumulation, and soft tissue health were evaluated after 3, 6, and 12 months. The final restorations were cemented in the maxilla after 6 months and in the mandible after 3 months.

Results: Twelve implants failed (98% survival rate) after 12 months. None of the splinted implants failed during the follow-ups. There were five failures in unsplinted partial cases. The average amounts of bone loss around the implants were 0.40 ± 0.35 mm, 0.56 ± 0.41 mm, and 0.59 ± 0.41 mm after 3, 6, and 12 months, respectively. Visible plaque was registered in 18% of the implants, and bleeding on probing was observed in 17% of the implants after 12 months.

Conclusions: High survival rates and favorable host tissue responses support the clinical performance of OPS implants. This study demonstrated that one-piece implants can be efficiently used by well-trained general dentists.

Keywords: bone resorption; general dentists; implant survival; multicenter; one-piece implant.

MeSH terms

  • Aged
  • Alveolar Bone Loss / chemically induced
  • Dental Implantation, Endosseous*
  • Dental Implants
  • Dental Prosthesis, Implant-Supported*
  • Dental Restoration Failure*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Prospective Studies
  • Survival Rate


  • Dental Implants