Early bone formation around immediately restored implants with and without occlusal contact: a human histologic and histomorphometric evaluation. Case report

Int J Oral Maxillofac Implants. 2009 Jul-Aug;24(4):734-9.

Abstract

Human biopsy of immediately loaded implants is the most definitive means to determine the occurrence of osseointegration. This case report discusses the histologic and histomorphometric analysis of the bone-titanium interface in immediately restored implants with and without occlusal contact, retrieved after a healing period of 5 weeks. The two implants had been inserted in the posterior mandible; both were freestanding. One implant had been put into functional loading (in occlusal contact) with a fixed provisional prosthesis on the day of implant surgery (implant A), whereas the other implant was restored without occlusal contact (implant B). Both implants were retrieved with a 5-mm trephine after 5 weeks. Before retrieval, both implants appeared to be clinically osseointegrated, and no mobility was present. Both implants were surrounded by newly formed bone lamellae. In both implants about 0.5 to 1 mm of pre-existing and newly formed bone was found coronal to the implant shoulder, with no resorption of the pre-existing coronal bone. The bone-implant contact percentage in implant A was 51.2% +/- 4.5%, whereas in implant B it was 55.1% +/- 2.3%. Within the limitations of this study, the histologic findings indicated that no differences were found in the histologic response around immediately restored implants with and without occlusal contact.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biopsy
  • Bite Force
  • Bone Density / physiology
  • Bone Marrow / blood supply
  • Bone Marrow / pathology
  • Bone Matrix / pathology
  • Capillaries / pathology
  • Dental Abutments
  • Dental Implants*
  • Dental Materials / chemistry
  • Dental Occlusion*
  • Dental Prosthesis Design
  • Female
  • Follow-Up Studies
  • Humans
  • Jaw, Edentulous, Partially / rehabilitation
  • Jaw, Edentulous, Partially / surgery
  • Mandible / pathology
  • Mandible / surgery*
  • Middle Aged
  • Osseointegration / physiology
  • Osteoblasts / pathology
  • Osteogenesis / physiology*
  • Surface Properties
  • Titanium / chemistry

Substances

  • Dental Implants
  • Dental Materials
  • Titanium