An open prospective single cohort multicenter study evaluating the novel, tapered, conical connection implants supporting single crowns in the anterior and premolar maxilla: interim 1-year results

Clin Oral Investig. 2017 Jul;21(6):2133-2142. doi: 10.1007/s00784-016-2003-0. Epub 2016 Nov 18.


Objectives: The aim of this multicenter prospective clinical study was to evaluate anodized tapered implants with a conical connection and integrated platform shifting placed in the anterior and premolar maxilla.

Materials and methods: The study enrolled patients requiring single-tooth restorations in healed sites of maxillary anterior and premolar teeth. All implants were immediately temporized. Clinical and radiographic evaluations were conducted at implant insertion, 6 months, and 1 year. Outcome measures included bone remodeling, cumulative survival rate (CSR), success rate, soft-tissue health and esthetics, and patient satisfaction. Bone remodeling and pink esthetic score were analyzed using Wilcoxon signed-rank tests. CSR was calculated using life table analysis. Other soft-tissue outcomes were analyzed using sign tests.

Results: Out of 97 enrolled patients (102 implants), 87 patients (91 implants) completed the 1-year visit. Marginal bone remodeling was -0.85 ± 1.36 mm. After the expected initial bone loss, a mean bone gain of 0.11 ± 1.05 mm was observed between 6 months and 1 year. The CSR was 99.0%, and the cumulative success rate was 97.0%. Partial or full papilla was observed at 30.8% of sites at baseline, 87.2% at 6 months, and 90.5% at 1 year. Soft-tissue response, esthetics, and patient satisfaction all improved during the study period.

Conclusions: Bone gain was observed following the expected initial bone loss, and soft-tissue outcomes improved suggesting favorable tissue response using anodized tapered conical connection implants.

Clinical relevance: Rapid stabilization of bone remodeling and robust papilla regeneration indicate favorable tissue healing promoted by the conical connection, platform-shift design.

Trial registration: NCT02175550.

Keywords: Anterior maxilla; Conical connection; Immediate temporization; Platform shifting.

Publication types

  • Clinical Study
  • Multicenter Study

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Bone Remodeling / physiology*
  • Crowns*
  • Dental Implants, Single-Tooth*
  • Dental Prosthesis Design
  • Dental Prosthesis, Implant-Supported*
  • Esthetics, Dental
  • Female
  • Humans
  • Immediate Dental Implant Loading
  • Life Tables
  • Male
  • Maxilla / surgery
  • Middle Aged
  • Patient Satisfaction
  • Prospective Studies
  • Treatment Outcome

Associated data