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OBJECTIVE:This research is to evaluate and analyze the bone loss around the unloaded implants 3-4 months after their placement by digital panoramic radiograp.METHODS :32 subjects from our hospital who were placed 43 Replace pure titanium implants were selected.0 day、3-4months after their placement,the peri—implant bone resorption was measured and calculated by digital panoramic radiograp.All data were analyzed by SPSS10.0.RESULTS:3-4 months after the implant placement,the distance of the peri—implant bone resorption is 0.09mm/0.12mm.It showed no obvious difference (P>0.05).CONCLUSION:The result of peri—implant bone loss was almost same after we analyzing the clinical parameters by digital panoramic radiograp.