Abstract：Objective: To compare the effect of digital impression and alloy splint impression on the edge of implant crown and bridge restoration. Methods: 120 patients with crown and bridge implantation from January 2019 to January 2021 in our hospital were prospectively selected as the subjects, and randomly divided into observation group (alloy splint impression) and control group (digital impression), with 60 cases in each group. The two groups were observed for 3 months, and the periodontal indexes of the two groups before and after treatment were compared. Patients were followed up for the incidence of defective restorations and the degree of closeness of the edges of the restorations and surveyed on satisfaction. Results: There was no significant difference in periodontal indexes between the two groups before treatment (P<0.05); the plaque index, periodontal pocket depth, gingival index and bleeding index in the observation group were lower than those in the control group after treatment, and the differences were statistically significant (P<0.05); the ratio of prostheses that were too long or too short and early contact in the observation group (3.3%, 5.0%) was significantly lower than that of the control group (13.1%, 16.7%), the difference was statistically significant (P<0.05); there was no statistically significant difference in the incidence of overhang and over-loose or over-tightening (P>0.05); the observation group had lower edge consistency at A1, A2, A3, A4 and A5 points than the control group, and the difference was statistically significant (P<0.05); the patient satisfaction in the observation group (95.0%) was significantly higher than that in the control group (80.0%), and the difference was statistically significant (P<0.05). Conclusion: Compared with digital impressions, alloy splint impressions can improve the tightness of the edge of implant crown and bridge restorations, which improves the patient's periodontal indicators, reduces the occurrence of too long or too short restorations, and early contact, etc, and patient satisfaction is high, which is worthwhile for application.
李琳, 黄丽云, 曾苹苹, 邓丽, 张敬雷, 吕晓君, 孔丽青. 数字化印模和合金夹板印模对种植冠桥修复体边缘密合度的影响[J]. 河北医学, 2022, 28(9): 1546-1549.
LI Lin, HUANG Liyun, ZENG Pingping, et al. The Effect of Digital and Alloy Splint Impressions on the Marginal Fit of Implant Crown and Bridge Restorations. HeBei Med, 2022, 28(9): 1546-1549.
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2022, Vol. 28 
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