Objective To investigate the application value of full layer filling flow resin in wedge-shaped defect of posterior teeth based on periodontal health indexes, gingival crevicular fluid inflammation status and aesthetic effect.

Methods Two hundred patients (200 teeth) with wedge-shaped defects in the posterior teeth were divided into the observation group and control group according to the random number table method (100 cases each group). The observation group were filled with flow resin, and the control group was filled with traditional resin. The filling effect, aesthetic effect, incidence of tooth sensitivity and adverse filling outcome, periodontal health indicators (gingival index, plaque index and periodontal probe depth) and levels of interleukin-1β and IL-6 in gingival cervical fluid were compared between two groups.

Results After 6 months of treatment, the success rate of treatment in the observation group was 92.00% (92/100), and higher than that in control group (82.00%) (82/100) (P ＜ 0.05). The aesthetic satisfaction rate in the observation group immediately after treatment and at 6 months after treatment were higher than that in control group (P ＜ 0.05). At 6 months after treatment, the gingival index, plaque index and periodontal probe depth of the observation group were significantly lower than those of control group (P ＜ 0.01). After 1 week of treatment, the levels of IL-1β and IL-6 in gingival crevicular fluid in the observation group were lower than those in control group (P ＜ 0.05). At 1 week and 6 months after treatment, the dental sensitivity rate in the observation group was lower than that in control group (P ＜ 0.01 and P ＜ 0.05). The incidence rate of adverse outcome of filling body in the observation group was 13.00% (13/100), which was lower than that in the control group (24.00%) (24/100) (P ＜ 0.05).

Conclusions Full-layer filling with flowing resin can effectively reduce the inflammatory response of periodontal tissue in patients with posterior wedge-shaped defects, control the sensitivity of the affected tooth, reduce the adverse outcome of fillings, improve the state of periodontal tissue and provide better aesthetic and therapeutic effects for the patients.