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Bone reactions adjacent to titanium implants with different surface characteristics subjected to static load. A study in the dog (II)
Author(s) -
Gotfredsen Klaus,
Berglundh Tord,
Lindhe Jan
Publication year - 2001
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 - 10.1034/j.1600-0501.2001.012003196.x
Subject(s) - implant , titanium , dentistry , materials science , radiography , biomedical engineering , medicine , surgery , metallurgy
The purpose of the present study was to compare bone reactions adjacent to titanium implants with either a titanium plasma‐sprayed (TPS) or a machined surface subjected to lateral static loading induced by an expansion force. In 3 labrador dogs, the 2 nd , 3 rd and 4 th mandibular premolars were extracted bilaterally. 12 weeks later, 2 implants with a TPS surface were placed in one side and 2 implants with a machined surface were placed in the contralateral side. Twelve weeks after implant installation, crowns, connected in pairs with orthodontic expansion screws, were fitted to the implants and a 0.6 mm wide expansion was initiated. Clinical registrations, standardized radiographs and fluorochrome labeling were carried out during a 24‐week period of loading. Biopsies with the implants in situ were harvested and processed for ground sectioning. The sections were subjected to histologic and histometric examination. A higher marginal bone level was observed around implants with a TPS surface compared to machined implants. Furthermore, the values describing the amount of bone‐to‐implant contact at the bone/implant interface as well as the density of the peri‐implant bone were lower at the machined than at the TPS implants.