IADR Abstract Archives
Evaluation of Zirconia Frameworks After Observation Time of Ten Years
Objectives: In recent years the demand for all-ceramic restorations increased due to their high biocompatibility and enhanced esthetic. Meanwhile, zirconia-based all-ceramic posterior fixed partial dentures (FPDs) are well established.
Nevertheless, long-term scientific evidence is still needed. The aim of this prospective clinical trial was to evaluate the abrasion of zirconia-based all-ceramic posterior fixed partial dentures (FDPs) after ten years of clinical use
Methods: This prospective study was conducted at Dental Clinic 2–Prosthodontics, Friedrich-Alexander-University, Erlangen-Nuremberg, Germany.
30 patients, who needed a 3- or 4-unit posterior FPD (distal to the first premolar), were randomly selected and provided with 30 all-ceramic FDPs with zirconia frameworks made by using Lava system (3M ESPE). A dentist examined the patients at baseline, 3-, 5- and 10-years follow-up. At 10 years follow-up 17 patients were able to visit our clinic. The clinical parameter and 3D abrasion were evaluated. The data was analyzed by descriptive statistics. The Wilcoxon Signed Rank Test, which was corrected by the Benjamini-Hochberg correction, was applied
Results: During the observation period of ten years of clinical use, with 3-, 5- and 10-years follow-ups, the clinical success rate was 88.2% and 60% of the bridges showed no technical complication. Additionally, the 3D abrasion was calculated. The p-value varied between 0.001 and 0.004 in the different periods. At the 36-months follow-up examination the mean value of the abrasion was -3.458 mm3. After ten years in clinical use the mean-value of the abrasion was -9.055 mm3.
Conclusions: Within the limitations of this in vivo study, zirconia frameworks demonstrated very good long term clinical stability and the abrasion of veneered glass ceramic was clinically acceptable
Nevertheless, long-term scientific evidence is still needed. The aim of this prospective clinical trial was to evaluate the abrasion of zirconia-based all-ceramic posterior fixed partial dentures (FDPs) after ten years of clinical use
Methods: This prospective study was conducted at Dental Clinic 2–Prosthodontics, Friedrich-Alexander-University, Erlangen-Nuremberg, Germany.
30 patients, who needed a 3- or 4-unit posterior FPD (distal to the first premolar), were randomly selected and provided with 30 all-ceramic FDPs with zirconia frameworks made by using Lava system (3M ESPE). A dentist examined the patients at baseline, 3-, 5- and 10-years follow-up. At 10 years follow-up 17 patients were able to visit our clinic. The clinical parameter and 3D abrasion were evaluated. The data was analyzed by descriptive statistics. The Wilcoxon Signed Rank Test, which was corrected by the Benjamini-Hochberg correction, was applied
Results: During the observation period of ten years of clinical use, with 3-, 5- and 10-years follow-ups, the clinical success rate was 88.2% and 60% of the bridges showed no technical complication. Additionally, the 3D abrasion was calculated. The p-value varied between 0.001 and 0.004 in the different periods. At the 36-months follow-up examination the mean value of the abrasion was -3.458 mm3. After ten years in clinical use the mean-value of the abrasion was -9.055 mm3.
Conclusions: Within the limitations of this in vivo study, zirconia frameworks demonstrated very good long term clinical stability and the abrasion of veneered glass ceramic was clinically acceptable