This study aims to systematically evaluate the clinical application and prognostic effect of glass fiber post restoration in patients with dental defects.A retrospective analysis was conducted on 112 patients who rece...This study aims to systematically evaluate the clinical application and prognostic effect of glass fiber post restoration in patients with dental defects.A retrospective analysis was conducted on 112 patients who received this restoration in the Department of Stomatology of a hospital over the past three years,with a follow-up period of 12 to 36 months.The results showed that the overall retention rate of the restorations was 93.8%,the incidence of root fracture was 2.7%,and the patients'subjective satisfaction was 90.2%.The study confirmed that glass fiber posts,with characteristics such as elastic modulus close to dentin,uniform stress distribution,and good aesthetic performance,exhibit excellent clinical effects in cases meeting the indications.However,their long-term stability is significantly affected by factors such as the amount of remaining dental tissue,bonding technology,and crown restoration quality.Conclusion:Glass fiber post is an effective method for dental defect restoration,but strict control of indications and standardized operating procedures are required to improve long-term prognosis.展开更多
Biocopolymers based on vanillin/fufurylamine-biobenzoxazine(V-fa)and epoxide castor oil(ECO),a bioepoxy,were prepared for application as dental fiber-reinforced composite post.The mechanical and thermal properties of ...Biocopolymers based on vanillin/fufurylamine-biobenzoxazine(V-fa)and epoxide castor oil(ECO),a bioepoxy,were prepared for application as dental fiber-reinforced composite post.The mechanical and thermal properties of the V-fa/ECO biocopolymers were assessed with regard to the influence of ECO content.The addition of the ECO at an amount of 20%by weight into the poly(V-fa)preserved the stiffness,glass transition temperature and thermal stability nearly to the poly(V-fa).Differential scanning calorimetry(DSC)was used to examine the curing kinetics of the V-fa/ECO monomer system with different heating rates.To determine the activation energy(E_(a)),the experimental data were subjected to the isoconversional methods,namely Flynn-Wall-Ozawa(FWO)and Friedman(FR).The V-fa/ECO monomer mixture showed average E_(a)values of 105 kJ/mol and 94 kJ/mol.The results derived using the curing reaction model and the experimental data were in good agreement,demonstrating the efficacy of the FWO method for determining the curing kinetics parameters.The simulated mechanical response to external applied loads by finite-element analysis of the tooth model restored with glass fiber-reinforced V-fa/ECO biocopolymer post showed a similar stress field to the tooth model restored with a commercial glass fiber post.Therefore,based on the findings in this work,it is evident that the bio-based benzoxazine/epoxy copolymer possesses a great potential to be used for dental fiber post.展开更多
文摘This study aims to systematically evaluate the clinical application and prognostic effect of glass fiber post restoration in patients with dental defects.A retrospective analysis was conducted on 112 patients who received this restoration in the Department of Stomatology of a hospital over the past three years,with a follow-up period of 12 to 36 months.The results showed that the overall retention rate of the restorations was 93.8%,the incidence of root fracture was 2.7%,and the patients'subjective satisfaction was 90.2%.The study confirmed that glass fiber posts,with characteristics such as elastic modulus close to dentin,uniform stress distribution,and good aesthetic performance,exhibit excellent clinical effects in cases meeting the indications.However,their long-term stability is significantly affected by factors such as the amount of remaining dental tissue,bonding technology,and crown restoration quality.Conclusion:Glass fiber post is an effective method for dental defect restoration,but strict control of indications and standardized operating procedures are required to improve long-term prognosis.
基金National Research Council of Thailand(NRCT)and Srinakharinwirot University(grant number N42A650377)Srinakharinwirot University(grant number 588/2565)+1 种基金the NSRF via the Program Management Unit for Human Resources and Institutional Development,Research and Innovation(grant number B05F640094)the National Research Council of Thailand(NRCT)and Chulalongkorn University(grant number N42A660910).
文摘Biocopolymers based on vanillin/fufurylamine-biobenzoxazine(V-fa)and epoxide castor oil(ECO),a bioepoxy,were prepared for application as dental fiber-reinforced composite post.The mechanical and thermal properties of the V-fa/ECO biocopolymers were assessed with regard to the influence of ECO content.The addition of the ECO at an amount of 20%by weight into the poly(V-fa)preserved the stiffness,glass transition temperature and thermal stability nearly to the poly(V-fa).Differential scanning calorimetry(DSC)was used to examine the curing kinetics of the V-fa/ECO monomer system with different heating rates.To determine the activation energy(E_(a)),the experimental data were subjected to the isoconversional methods,namely Flynn-Wall-Ozawa(FWO)and Friedman(FR).The V-fa/ECO monomer mixture showed average E_(a)values of 105 kJ/mol and 94 kJ/mol.The results derived using the curing reaction model and the experimental data were in good agreement,demonstrating the efficacy of the FWO method for determining the curing kinetics parameters.The simulated mechanical response to external applied loads by finite-element analysis of the tooth model restored with glass fiber-reinforced V-fa/ECO biocopolymer post showed a similar stress field to the tooth model restored with a commercial glass fiber post.Therefore,based on the findings in this work,it is evident that the bio-based benzoxazine/epoxy copolymer possesses a great potential to be used for dental fiber post.
