The Impact of Adhesion Strategy on the Clinical Performance Of Indirect Dental Restorations
The Influence of Cement Systems on the Outcome of Tooth Supported Zirconia Crowns in the Posterior Region: a Randomized ,Multicenter, and Practice-based Clinical Trial
The goal of this clinical trial is to evaluate whether different cement systems influence the clinical outcome of posterior tooth supported zirconia crowns in adult patients requiring single crown restorations. The main questions it aims to answer are:
- Do glass ionomer cements provide clinical outcomes comparable to those of resin cements for posterior zirconia crowns?
- Do marginal discoloration, marginal integrity, and biological complications differ between the cement systems?
- Do patient reported and clinician reported outcomes differ between the cementation procedures?
Researchers will compare zirconia crowns cemented with either a glass ionomer cement or a resin cement to evaluate differences in clinical outcomes.
Participants will:
- Receive posterior zirconia crowns fabricated according to standardized clinical procedures
- Be randomized to cementation with either a glass ionomer cement or a resin cement
- Undergo clinical examinations assessing crown survival, marginal adaptation, discoloration, caries, periodontal status, and wear
- Complete questionnaires regarding patient comfort and treatment experience
- Attend baseline and annual follow-up examinations for up to 10 years
Studieöversikt
Status
Betingelser
Intervention / Behandling
Detaljerad beskrivning
Tooth damage has significant impact on a person's quality of life and damaged teeth should be treated to restore lost functions and prevent further damage. Loss of tooth substance can be restored by a direct (filling) or indirect restoration (artificial crown). These interventions differ in some operative aspects but share key challenges, particularly in achieving optimal adhesion to tooth substance to secure predictable retention and the integrity of the marginal seal.
Failure of the adhesive interface is a major determinant of restoration longevity and may manifest across patient-centered, biological, and technical outcomes.
Marginal degradation may result in discoloration, representing an early clinical indicator of interface breakdown that negatively affects patient satisfaction and may lead to a need for retreatment. Progressive marginal leakage facilitates bacterial access, increasing the risk of biological complications such as secondary caries and pulpal involvement.
Loss of retention represents a major technical complication, often requiring replacement of the restoration and contributing to cumulative loss of tooth structure over time.
Despite advances in restorative materials and adhesive systems, clinical outcomes remain variable, and the relative contribution of material properties, procedural complexity, and biological factors to long-term failure is not fully understood. In particular, the role of technique sensitivity and procedural complexity as independent determinants of restoration survival remains insufficiently characterized. Improved understanding of these interacting factors will enable more precise selection of restorative materials and cementation strategies.
This project will: (a) identify and quantify clinically relevant determinants of restoration failure, enabling improved prediction of restoration survival and patient satisfaction, (b) elucidate how interfacial degradation and technique sensitivity contribute to biological and technical complications, (c) aid clinical decision-making by guiding selection of materials and procedures based on their performance and complexity.
Studietyp
Inskrivning (Beräknad)
Fas
- Inte tillämpbar
Kontakter och platser
Studieorter
-
-
Skåne County
-
Hörby, Skåne County, Sverige
- Sandin Dentalklinik
-
Malmö, Skåne County, Sverige, 21118
- Tandläkare Le
-
-
Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
- Vuxen
- Äldre vuxen
Tar emot friska volontärer
Beskrivning
Inclusion Criteria:
- Need of one single crown on vital posterior tooth
- Speak and understand Swedish language
- Free from dental/oral disease; caries, periodontal disease
Exclusion Criteria:
- Only individuals who do not meet the inclusion criteria will be excluded.
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Behandling
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Fyrdubbla
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Aktiv komparator: Resin cement
Tooth-supported zirconia crowns cemented with a resin-based cement
|
Zirconia crowns cemented with resin cement
|
|
Aktiv komparator: Glass-ionomer cement
Tooth-supported zirconia crowns cemented with a glass-ionomer cement
|
Zirconia crowns cemented with glass-ionomer cement
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Clinical outcome of tooth-supported zirconia crowns from baseline to 1-year follow up
Tidsram: Baseline and 1 year.
|
Clinical performance of tooth supported zirconia crowns assessed using modified CDA criteria, including survival, success, biological complications, technical complications, marginal integrity, discoloration, and surface morphology.
|
Baseline and 1 year.
|
|
Clinical outcome of tooth-supported zirconia crowns from baseline to 3-year follow up
Tidsram: Baseline and 3 years.
|
Clinical performance of tooth supported zirconia crowns assessed using modified CDA criteria, including survival, success, biological complications, technical complications, marginal integrity, discoloration, and surface morphology.
|
Baseline and 3 years.
|
|
Clinical outcome of tooth-supported zirconia crowns from baseline to 5-year follow up
Tidsram: Baseline and 5 years.
|
Clinical performance of tooth supported zirconia crowns assessed using modified CDA criteria, including survival, success, biological complications, technical complications, marginal integrity, discoloration, and surface morphology.
|
Baseline and 5 years.
|
|
Clinical outcome of tooth-supported zirconia crowns from baseline to 10-year follow up
Tidsram: Baseline and 10 years.
|
Clinical performance of tooth supported zirconia crowns assessed using modified CDA criteria, including survival, success, biological complications, technical complications, marginal integrity, discoloration, and surface morphology.
|
Baseline and 10 years.
|
Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Change from Baseline in "Patient-reported Outcome Measurement" at 1 year
Tidsram: Baseline and 1 year.
|
Patient reported and operator reported outcomes will be assessed using structured questionnaires evaluating treatment comfort, clinical handling, and overall satisfaction.
Questionnaire scores range from 1 to 5, where higher scores indicate greater satisfaction and improved treatment experience.
|
Baseline and 1 year.
|
|
Change from Baseline in "Patient-reported Outcome Measurement" at 3 year
Tidsram: Baseline and 3 year.
|
Patient reported and operator reported outcomes will be assessed using structured questionnaires evaluating treatment comfort, clinical handling, and overall satisfaction.
Questionnaire scores range from 1 to 5, where higher scores indicate greater satisfaction and improved treatment experience.
|
Baseline and 3 year.
|
Samarbetspartners och utredare
Sponsor
Utredare
- Huvudutredare: Christel Larsson, Ph.D., Malmö University
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Primärt slutförande (Beräknad)
Avslutad studie (Beräknad)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- 2026-03170-01
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