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Research Article: Knowledge acquisition and retention following small-group case-based learning combined with sheep head animal model training in oral and maxillofacial surgery: a single-arm quasi-experimental study

Date Published: 2026-07-15

Abstract:
Developing competence in Oral and Maxillofacial Surgery (OMFS) requires effective integration of theoretical knowledge with procedural understanding. In resource-limited educational settings, opportunities for patient-based surgical training may be restricted, highlighting the need for alternative instructional strategies. This study evaluated changes in OMFS knowledge acquisition and short-term retention following small-group case-based learning combined with sheep head animal model training among dental trainees. A single-arm, pretest–posttest quasi-experimental study was conducted among fifth-year undergraduate dental students and postgraduate dental interns at a single institution. Participants completed a standardized knowledge assessment at baseline (T0), immediately following the intervention (T1), and at a 4-week follow-up (T2). The educational intervention consisted of structured small-group case-based discussions integrated with supervised hands-on training using sheep head models. Knowledge scores were analyzed using one-way repeated measures ANOVA with Greenhouse–Geisser correction and Bonferroni-adjusted post-hoc comparisons. Learner perceptions were assessed using a validated 14-item Likert-scale questionnaire. Effect size was reported using partial eta squared (? 2 ), and internal consistency was evaluated using Cronbach’s alpha. Fifty-one participants completed all assessments (response rate 67.1%). Mean knowledge scores increased significantly from baseline (50.75 ± 14.87) to immediately post-intervention (73.57 ± 16.78) and remained significantly higher at follow-up (70.24 ± 17.17). A significant effect of time was observed [ F (1.12, 56.12) = 151.89, p < 0.001], with a large effect size (partial ? 2 = 0.75). Post-hoc analysis demonstrated significant improvements from T0 to T1 and from T0 to T2 ( p < 0.001 for both), with a small but significant decline between T1 and T2. Learner perceptions were highly favorable, with a mean total perception score of 81.32 ± 17.24 and excellent internal consistency (Cronbach’s ? = 0.943). Small-group case-based learning combined with sheep head animal model training was associated with substantial improvements in OMFS knowledge and meaningful retention at 4 weeks, alongside high learner satisfaction. Although objective surgical skills were not assessed, this low-cost, simulation-enhanced educational approach may support competency development in OMFS, particularly in resource-limited training environments. Future studies employing controlled designs and objective skills-based assessments are warranted.

Introduction:
Developing competence in Oral and Maxillofacial Surgery (OMFS) requires effective integration of theoretical knowledge with procedural understanding. In resource-limited educational settings, opportunities for patient-based surgical training may be restricted, highlighting the need for alternative instructional strategies. This study evaluated changes in OMFS knowledge acquisition and short-term retention following small-group case-based learning combined with sheep head animal model training among dental trainees.

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