Objective To study the effect of PDCA cycle on the image quality of oral photography in patients with periodontal disease.Methods Totally 94 patients with periodontal disease admitted to our hospital from February to July 2022 were selected.47 patients who took oral photography images from February to April 2022 were included in the control group,and 47 patients who took oral photography images from May to July 2022 were included in the PDCA group.At the same time,9 nursing staff in the periodontal department of our hospital were selected.The patients in the control group were taken conventional photography,PDCA group used PDCA cycle on the basis of the control group.The image quality of the two groups of patients with periodontal disease and their satisfaction with the oral photography process were compared.The deduction of points for photography technology of nursing staff before and after the implementation of PDCA cycle were compared.Results The rate of reaching the standard of image quality in PDCA group was significantly higher than that in the control group(P<0.05).The satisfaction of PDCA group with oral photography was significantly higher than that of the control group(P<0.05).After the implementation of PDCA cycle,the deduction of points of material preparation,frontal,lateral,lingual,maxillofacial,maxillofacial,photography time and photography technology of nursing staff were significantly lower than those before the implementation(P<0.05).Conclusion PDCA circulation can effectively improve the rate of reaching the standard of oral photography image quality of patients with periodontal disease,increase their satisfaction with the photography process,and improve the nursing staff's photography technology score.