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Agreement Between Faculty and %Comparison for Preparation Depth Assessment in a Dental Technique Skills Course
Ramtin Sadid-Zadeh1, Brian Lawson2, Jia Hua2
1Ramtin Sadid-Zadeh, DDS, MS, is Assistant Professor, Department of Restorative Dentistry, University at Buffalo School of Dental Medicine; Brian Lawson, BDS, is a senior DDS student, University at Buffalo School of Dental Medicine; Jia Hua, MA, is a biostatistician, Department of Public Health, University at Buffalo; and Hema Arany, BDS, MDS, CAGS, is Clinical Instructor, Departments of Restorative Dentistry and Pediatric and Community Dentistry, University at Buffalo School of Dental Medicine. rsadidza@buffalo.edu.
Abstract:
The aim of this retrospective study was to assess agreement between faculty and virtual assessment software in depth evaluation of rounded rectangular preparations in non-anatomical teeth prepared by second-year dental students. A total of 184 non-anatomical ivorine mandibular first molars prepared by second-year students were retrospectively evaluated in 2018. Each tooth was prepared to a depth of 1.5 mm within a laser-marked outline using a 330 bur, as detailed in the technique skills course syllabus. Preparations were recorded using an intraoral scanner. Then, virtual assessment software was used to superimpose a three-dimensional (3D) image of each preparation on a 3D image of a standard preparation produced by a faculty member. The software was used to calculate percentage comparison (%Comparison) values at 200 μm tolerance. Values of %Comparison ≥72% were considered satisfactory. In addition, each preparation depth was evaluated by two calibrated faculty members using a periodontal probe and a 330 bur. The preparation depth was considered satisfactory when more than 50% of the tooth preparation had a depth of 1.5 mm. The results showed almost perfect agreement (0.81 < kappa < 0.99) between faculty assessment and %Comparison value. The findings suggest that %Comparison values may be used to assess the tooth preparation depth of rounded rectangular preparations in non-anatomical teeth when prepared in a laser-marked outline.
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