Abstract: PURPOSE: To compare the effect of glass fiber post core porcelain crown and cobalt alloy post core porcelain crown in repairing residual root and crown of the anterior teeth. METHODS: The data of 121 patients with residual root and crown of anterior teeth admitted to the hospital from January 2020 to December 2023 were reviewed, of which 61 patients were treated with glass fiber post-core porcelain crown restoration (experimental group) and 60 patients with cogger alloy post core all porcelain crown repair (control group). The repair outcomes of the two groups were recorded after 12 months of follow-up. The final results, aesthetic effect, periodontal health index, gingival crevicular fluid inflammatory factors and complications were compared between the two groups. SPSS 18.0 software package was used for statistical analysis of the data. RESULTS: The success rate of the experimental group was significantly higher than that of the control group (P<0.05). There was no significant difference in pink esthetic scores (PES) and white aesthetic scores (WES) between the two groups before and after treatment (P<0.05). The sulcus bleeding index (SBI), gingival index (GI) and plaque index (PLI) after treatment were significantly lower in both groups than before treatment (P<0.05), and the experimental group after treatment was more lower(P<0.05). TNF-α, IL-6 and IL-8 levels after treatment were significantly lower in both groups than before treatment (P<0.05), and TNF-α and IL-6 levels in the experimental group after treatment were more lower (P<0.05). There was no significant difference in the total complication rate between the two groups (P>0.05). CONCLUSIONS: Compared to cobalt alloy post-core all-porcelain crown, glass fiber post-core all-porcelain crown can enhance the repair effect, improve periodontal health, inhibit the damage of gingival crevicular fluid inflammation.

Key words: Glass fiber post core, All-porcelain crown, Cobalt alloy post core, Anterior teeth, Residual roots and crowns