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Class II composite restoration technique teaching: A randomised controlled crossover laboratory-based trial involving
Oliver Bailey1, Bonnie Shand2, Ian Ellis1
1School of Dental Sciences, Newcastle University, Newcastle upon Tyne, UK.
Summary
A novel ringless sectional matrix technique significantly improved dental restoration quality compared to traditional ringed methods. Students preferred and felt prepared to use these advanced techniques, supporting their inclusion in dental education.
Area of Science:
- Restorative Dentistry
- Dental Materials Science
- Dental Education
Background:
- Assessing the impact of different matrix techniques on student restorative outcomes.
- Evaluating student preferences and clinical preparedness for new dental restorative techniques.
- Guiding the integration of effective techniques into undergraduate dental curricula.
Purpose of the Study:
- To compare the restorative outcomes of a novel ringless sectional matrix technique versus a traditional separating ring technique.
- To evaluate student preferences and preparedness for implementing new sectional matrix and composite placement techniques.
- To inform the incorporation of advanced restorative techniques into dental school curricula.
Main Methods:
- Dental students performed Class II composite restorations using two sectional matrix (ring vs. ringless) and two composite techniques (incremental vs. injection-moulded bulk-fill).
- Restorations were evaluated for quality, and students completed online surveys on technique preference and clinical readiness.
- Statistical analysis, including odds ratios, was used to compare outcomes between techniques.
Main Results:
- The ringless sectional matrix technique significantly reduced the occurrence of contact area concavity and cervical marginal overhang compared to the separating ring technique.
- "Good" restorations were substantially more frequent with the ringless matrix (29.5x) and injection-moulded bulk-fill (3.3x) methods.
- A majority of students favored the ringless matrix and bulk-fill composite techniques and reported high confidence in their clinical application.
Conclusions:
- The novel ringless sectional matrix technique offers superior outcomes over traditional ringed methods, minimizing common restorative defects.
- Student preference and preparedness support the integration of the ringless matrix and bulk-fill composite techniques into undergraduate dental programs.
- These findings advocate for curriculum updates to include advanced, student-preferred restorative methods for improved clinical proficiency.
