Abstract:Abstract: Objective To investigate the changes of urinary deoxypyridinoline and serum C-reactive protein before and after artificial dental implant restoration. Methods In this study, 60 cases of peri-implantitis in Guangxi area from July 2011 to June 2016 were collected as peri-implantitis group, 60 cases of healthy implants were collected as healthy implant group, and 60 healthy people were collected as control group. The urinary deoxypyridinoline content and serum C-reactive protein level were determined. Results There was no significant difference in urinary deoxypyridinoline content or serum C-reactive protein level among the three groups before operation (P > 0.05). The levels of urinary deoxypyridinoline and serum C-reactive protein after operation in the peri-implantitis group were higher than those before operation and in the control group (P < 0.05). The levels of urinary deoxypyridinoline and serum C-reactive protein at 1 month after implantation in the healthy implant group were higher than those before operation and in the control group (P < 0.05). The levels of urinary deoxypyridinoline and serum C-reactive protein in the peri-implantitis group were higher than those in the healthy implant group at 1 month after implantation (P < 0.05). There was a positive correlation between serum C-reactive protein level and urinary deoxypyridinoline content in the peri-implantitis group and the healthy implant group (P < 0.05). Conclusions The levels of urinary deoxypyridinoline and serum C-reactive protein are significantly increased in the patients with peri-implantitis after artificial dental implant restoration. The levels of urinary deoxypyridinoline and serum C-reactive protein of the patients with healthy implants after artificial dental implant restoration are also increased.