Journal of Periodontology 2019-Sep
TLR4 mediates alveolar bone resorption in experimental peri-implantitis through regulation of CD45+ cell infiltration, RANKL/OPG ratio, and inflammatory cytokine production.
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Keywords
Abstract
METHODS
Smooth surface titanium implants were placed in the left maxilla alveolar bone 6 weeks after extraction of first and second molars in Wild-type (WT) and TLR4-/- (TLR4 KO) mice. Silk ligatures immersed with P. gingivalis were tied around the implants 4 weeks after the implant placement and confirmation of osteointegration. Two weeks after the ligation, bone resorption, osteoclastogenesis, cellular inflammatory responses and gingival mRNA expression levels of cytokines were assessed by micro-computed tomography, Tartrate-resistant acid phosphatase (TRAP) staining, immunobiological examination and Real-time quantitative PCR respectively.