[Comparison of aesthetic effect between immediate and delayed implant restoration of single maxillary anterior tooth]

To compare the aesthetic effects of immediate implant restoration and delayed implant restoration of single maxillary anterior tooth.

A total of 163 patients who underwent single anterior tooth implantation in the maxilla at Taikang Xianlin Drum Tower Hospital from January 2020 to May 2023 were selected. They were divided into immediate implant restoration group(n=75) and delayed implant restoration group(n=88). In the immediate implant restoration group, a temporary implant was installed and implanted immediately after extraction, while in the delayed implant restoration group, the implant was implanted 3-6 months after extraction and repaired after the implant was stabilized. The outcomes, including implant success rate, soft tissue aesthetics, implant stability, aesthetic outcomes, periodontal health, pink esthetic score (PES), white esthetic score (WES), bone resorption after 12 months and subjective satisfaction were compared between the two groups.

After exclusion, totally 62 patients in the immediate implant restoration group and 64 patients in the delayed implant restoration group were included in the analysis. Both groups had a 100% implant success rate with no significant difference between the two groups(P＞0.05). The immediate implant restoration group was significantly better in terms of soft tissue aesthetics and implant stability compared to the delayed implant restoration group(P＜0.05). Aesthetic effect scores for the immediate implant restoration group were significantly higher than those of the delayed group at 1, 3, 6 and 12 months postoperatively(P＜0.05). The periodontal tissue health of the immediate implant restoration group was significantly better than that of the delayed group at various time points(P＜0.05). PES and WES scores of immediate implant restoration group were significantly better than those of the delayed group(P＜0.05). At 12 months after surgery, bone resorption in the immediate implant restoration group was significantly lower than that in the delayed group, subjective satisfaction score was significantly higher than that in the delayed group(P＜0.05), and there was no significant difference in color satisfaction between the two groups(P＞0.05).

Immediate implant restoration of maxillary single anterior teeth is superior to delayed implant restoration in soft tissue aesthetic effect, implant stability and patient satisfaction, which is suitable for patients with high aesthetic requirements.