Not Yet RecruitingNot Applicable

A Prospective Clinical Trial Evaluating Outcomes of Surveyed Zirconia Crowns

50 participantsStarted 2025-01-06

Plain-language summary

Zirconia has shown to be a suitable substitute for metal ceramic crowns when comparing survival, biological and technical complications. Evidence demonstrating the outcomes of surveyed zirconia crowns on removable partial denture abutments is unavailable. Zirconia as a substitute for metal ceramic is being currently used for fabricating surveyed crowns although quantitative data evaluating its efficacy is sparse. The purpose of this prospective clinical trial is to evaluate clinical outcomes when zirconia is used as a full coverage restoration on removable partial denture abutments. The study will be designed as a 3-5 year prospective observational trial in the University of Toronto undergraduate clinic in a controlled environment. Outcomes measures will include survival, biological and technical complications. Descriptive statistics will be used to summarize patient characteristics and outcomes and for categorical variables frequency and percentages will be reported. A level of significance 0.05 will be used for inferential analysis, with p-values \< 0.05 reported as statistically significant. It is expected that zirconia will demonstrate similar outcomes to traditional metal ceramic surveyed crowns.

Who can participate

Age range18 Years

SexALL

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Inclusion Criteria: * Inclusion criteria: Patient recruitment will be from the adult patient population that presents to the undergraduate/graduate prosthodontic dental clinic requiring new tooth or tissue supported removable cast dental prostheses to replace missing teeth for the following situations: * In Kennedy Class 1 and 2 tisuue supported RPD's-Terminal abutments 3,4,5,6 * In Kennedy Class 3 and 4 tooth supported RPD's- any abutment teeth selected will need to be documented if selected as abutments for a surveyed crown. * Selection of abutment teeth for zirconia surveyed crowns will be similar to that currently utilized when selecting cast RPD abutments to be restored with either porcelain fused to metal or full metal surveyed crowns for tissue and tooth supported cast RPD's. Identifiable data will include: * RPD abutment teeth which may benefit from full coverage due to large restorations. * Posterior endodontically treated teeth with inadequate marginal ridge support and * Abutment teeth which require axial modification for RPD retentive and or stability elements. * In situations where esthetic improvement is desirable * Reasons for selection wil be documented. Exclusion Criteria: * Crowns that need to be splinted; patients that decline a surveyed crown; patients under the age of 18 years; patients that decline to participate in the study.