RT Journal Article
T1 Clinical evaluation of posterior zirconia-based and porcelain-fused-to-metal crowns with a vertical preparation technique: an up to 5-year retrospective cohort study
A1 González Bonilla, Mario
A1 Berrendero Dávila, Santiago
A1 Morón Conejo, Belén
A1 Martínez Rus, Francisco
A1 Salido Rodríguez-Manzaneque, María Paz
AB Objective: To evaluate the clinical conditions of single-unit posterior restorations on teeth prepared without finishing line, after 5.6 years of clinical service.Materials and methods: 50 crowns (25 zirconia-based (Zr) and 25 porcelain-fused-to-metal (PFM)) were selected from 34 patients. The restorations were evaluated according to the California Dental Association (CDA) Quality Criteria, and periodontal variables were studied in the abutment teeth compared with the unrestored contralateral teeth. Variables were examined using Mann-Whitney and Pearson´s Chi-Square tests (α = 0.05). The success of the prosthesis was calculated using Kaplan-Meier test.Results: CDA Quality Criteria was considered satisfactory-excellent in all restorations except for one of them, due to chipping on a PFM crown. At, 66 months, the success rates for PFM and Zr crowns were 85.7 % and 100 %, respectively. The plaque index (PI) showed that the restored abutment teeth accumulated significantly less plaque than the control teeth, but the gingival index (GI) was statistically higher in the abutment teeth. In 80 % of cases the probing depth (PB) was ≤3 mm. In addition, in 21 % of the cases, gingival recession was less than 2 mm. The restoration material had a statistically significant effect on GI and PB, with Zr crowns showing less inflammation and less deep pockets than PFM restorations. On the contrary, greater gingival recession was found at the margins of the Zr crowns when compared to the PFM. No statistical differences were found between the two materials in the GI.Conclusions: Cemented crowns on vertical preparations show good clinical behavior after 5 years. The periodontal parameters (PI, GI, PD) of the Zr restorations are significantly better than those of PFM, with the exception of gingival recession.Clinical relevance: The use of restorations on vertically prepared teeth is a suitable alternative to classical horizontal preparations.
PB Elsevier
SN 0300-5712
YR 2024
FD 2024-03-28
LK https://hdl.handle.net/20.500.14352/130038
UL https://hdl.handle.net/20.500.14352/130038
LA eng
NO Gonzalez-Bonilla M, Berrendero S, Moron-Conejo B, Martinez-Rus F, Salido MP. Clinical evaluation of posterior zirconia-based and porcelain-fused-to-metal crowns with a vertical preparation technique: an up to 5-year retrospective cohort study. J Dent. 2024 Sep;148:104953. doi: 10.1016/j.jdent.2024
DS Docta Complutense
RD 19 ene 2026