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Clin Implant Dent Relat Res. 2019 Feb 14. doi: 10.1111/cid.12733. [Epub ahead of print]

Immediately restored single implants in the aesthetic zone of the maxilla using a novel design: 5-year results from a prospective single-arm clinical trial.

Author information

1
Department of Oral Rehabilitation, Faculty of Dentistry, Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand.
2
Department of Oral Sciences, Faculty of Dentistry, Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand.
3
North Shore Prosthodontics, Private Practice, Auckland, New Zealand.

Abstract

BACKGROUND:

Single implant crowns have become the preferred rehabilitation treatment option for replacing a missing tooth.

PURPOSE:

This study evaluates 5-year clinical success of using tilted implants placed immediately after extraction followed by rehabilitation with all-ceramic crowns.

MATERIALS AND METHODS:

Twenty-seven participants requiring 28 single implant crowns in the aesthetic zone of maxilla were recruited to participate in a single-arm clinical trial. All participants were rehabilitated according to immediate implant placement using CP grade 4 titanium implants with roughened surfaces and a 12°-angled platform. Provisional implant crowns were connected within 4 hours of implant placement and loaded according to progressive loading protocol. At 8 weeks (baseline), definitive screw-retained crowns fabricated using densely sintered zirconia abutments with the veneering porcelain were delivered. Participants were followed up to 5 years and 16 participants with 17 single implant crowns attended Year 5 recall. Data collection included changes in marginal bone levels (MBLs), mid-buccal mucosal levels (MBMLs), implant stability quotient (ISQ) values, and any prosthodontic maintenance issues.

RESULTS:

The mean changes in MBLs at each recall was bone fill of 0.5 ± 1.18 mm (surgery-baseline), increase of 0.1 ± 0.57 mm (baseline-Year 1), and marginal bone loss of 0.1 ± 0.25 mm (Years 1-5). A minimal change occurred with the MBMLs during the observation period. The mean ISQ value at each time point increased from 65.1 (implant placement), to 67.4 (baseline) and 69.9 (Years 1 and 5). Prosthodontic maintenance issues occurred only during the first year which included fracture of veneering ceramic and zirconia abutment as well as aesthetic concerns.

CONCLUSIONS:

Within the limitations of this study, the data collected would suggest that replacing a single missing tooth using titanium oral implants with 12° platform tilt and zirconia abutments can be a successful rehabilitation option in the esthetically demanding zone of anterior maxilla.

KEYWORDS:

aesthetic zone; anterior maxilla; immediate; single implants

PMID:
30767417
DOI:
10.1111/cid.12733

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