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Laser ablation in titanium implants followed by biomimetic hydroxyapatite coating: Histomorphometric study in rabbits
Author(s) -
Faeda Rafael Silveira,
SpinNeto Rubens,
Marcantonio Elcio,
Guastaldi Antonio Carlos,
Marcantonio Elcio
Publication year - 2012
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.22018
Subject(s) - titanium , implant , cancellous bone , materials science , ablation , biomedical engineering , surface modification , coating , dentistry , laser ablation , cortical bone , osseointegration , chemistry , laser , surgery , composite material , anatomy , medicine , metallurgy , physics , optics
Titanium surface texture and chemistry modification successfully improves the host response and consequently the bone‐to‐implant contact surrounding dental implants. The aim of the present study was to investigate, using histomorphometrical‐analysis, the effects of titanium surface modification by laser‐ablation (Nd:YAG) followed by thin chemical deposition of HA. Forty‐eight rabbits received one implant by tibiae of AS‐machined (MS), laser‐modified (LMS), or biomimetic hydroxyapatite‐coated (HA) surface. Bone‐to‐implant contact (BIC) and bone area (BBT) were evaluated after 4, 8, and 12 weeks, at cortical and cancellous regions. Average BIC in the cortical region was higher ( P < 0.001) on the LMS and HA implants for all periods, with no differences between LMS and HA. For the cancellous area, the LMS and HA implants showed higher ( P < 0.01) BIC than MS at the initial periods. The LMS and HA showed similar values in the cortical region, but a tendency of higher values for HA in the cancellous region was observed in all periods. For the BBT, the differences were found only between HA and MS after 4 weeks in the cortical region ( P < 0.05), and after 12 weeks in the cancellous area ( P < 0.05). Our results showed that HA biomimetic coating preceded by laser treatment induced the contact osteogenesis and allowed the formation of a more stable bone–implant interface, even in earlier periods. Microsc. Res. Tech., 2012. © 2012 Wiley Periodicals, Inc.