Does a large dehiscent implant surface at placement affect the 5-year treatment outcome? An assessment of implants placed to support a maxillary overdenture

G. C. Boven*, H. J. A. Meijer, W. Slot, A. Vissink, G. M. Raghoebar

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


The aim of this study was to assess the 5-year clinical and radiographic outcome of implants with a dehiscent surface at implant placement.

A total of 26 consecutive patients (mean age 61.6 years; SD 8.0 years) with at least one implant with a dehiscent implant surface of >= two thirds of the implant length on the labial side were included. All implants were placed to support a maxillary overdenture. The implants were placed with adequate primary stability and the dehiscent surface was covered with autologous bone, inorganic bovine bone and a resorbable membrane. Outcome measures were soft tissue conditions, change of radiographic marginal bone level and implant survival. Baseline data (at loading, T0) were compared with 1-year (T1) and 5-year (T5) post loading data.

Of the 116 implants, 40 implants had no dehiscence, 16 had a buccal dehiscence <two thirds of the implant length, and 60 implants had a dehiscence >= two thirds. The peri-implant tissues were healthy and 5-year marginal bone changes were well within normal limits (-0.4 mm; range: -0.8 to -0.1). One implant was lost during the osseointegration period.

Even when implants are placed with a dehiscence > two thirds of the buccal implant surface, favorable 5-year peri-implant health can be achieved provided these dehiscences are covered with autologous bone, inorganic bone and a resorbable membrane, and there is good initial stability of the implants. (C) 2015 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)1758-1762
Number of pages5
JournalJournal of maxillofacial surgery
Issue number9
Publication statusPublished - Nov-2015


  • Dehiscence
  • Dental implant
  • Implant surface
  • Maxilla
  • Treatment outcome
  • SOFT

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