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Long‐term effects of magnetron‐sputtered calcium phosphate coating on osseointegration of dental implants in non‐human primates
Author(s) -
Alexander Fügl,
Christian Ulm,
Stefan Tangl,
Christoph Vasak,
Reinhard Gruber,
Georg Watzek
Publication year - 2009
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2008.01635.x
Subject(s) - osseointegration , amorphous calcium phosphate , implant , calcium , dentistry , coating , abutment , materials science , biomedical engineering , medicine , surgery , composite material , metallurgy , civil engineering , engineering
Objectives: To determine the effect of magnetron‐sputtered calcium phosphate coating of implants on the later stages of osseointegration in a non‐human primate model. Material and methods: Eighteen and 20 implants with a 0.1 μm amorphous calcium phosphate coating and a turned surface, respectively, were inserted in the anterior upper and lower jaw of adult non‐human primates. Following a 7.5 months healing period, one part of the implants remained in the submerged position. The other part of implants was connected to healing abutments to allow peri‐implant inflammation to occur. After another 20 months, histologic and histomorphometric analysis of the peri‐implant area was performed. Results: Submerged implants with a calcium phosphate coating and a turned surface showed no signs of an inflammatory reaction. The histomorphometric parameters ‘bone volume per tissue volume’ (BV/TV) and ‘bone‐to‐implant contacts’ (BIC) were not affected by calcium phosphate coating. Non‐submerged implants of both groups showed occasionally signs of inflammation at the implant–abutment junction. Histomorphometric analysis revealed that the distance between the implant–abutment junction and the most coronal level (where bone was attached to the implant) as well as BV/TV and BIC were independent from the surface modification. Conclusion: Our results show that dental implants with calcium phosphate coating behave similar to turned implants independently whether they are connected to healing abutments or remain submerged. Ultra‐thin calcium phosphate coating can combine the positive effects of calcium phosphate during the early stage of osseointegration without causing impairment of the later stages.