The assessment of suturing skills of dental undergraduates

A Comparison of Models for Teaching Suturing and Surgical Skills to Dental Students

Learning suturing skills is an important area of the undergraduate curriculum and ideally requires realistic and anatomically accurate surgical training models to prepare students for treating patients. Little is currently understood regarding which model might be perceived by students to be the best or which might most effectively facilitate their learning. The aim of this study was to compare four teaching models: a tabletop silicon dental model, a restricted access tabletop model, a traditional phantom head mounted model, and a Thiel cadaver. Student preferences were explored for each of the models. Following lecture and video-based teaching 67 fourth-year students attended a practical suturing teaching session followed by the second session more focused on the experience of cutting and suturing mucoperiosteal flaps. Forty-six students (67%) gave online anonymous feedback on the first session. The majority (95%) felt prepared to place a simple interrupted suture on a patient, and 88% felt confident to do so. Twenty-eight students (40%) provided feedback on the second session with 82% agreeing that they were prepared to cut a mucoperiosteal flap and 48% felt confident to do this for a patient. The cadaver model was rated as the best of the four models for both suturing and mucoperiosteal flap skills. These results support its use for teaching students to suturing and surgical skills. However, despite this teaching student-rated confidence to cut and suture flaps for a patient remains poor.

Objective assessment of intra-oral suturing for certification of competency

INTRODUCTION

Suturing is an essential skill for dental surgeons, yet there is limited evidence for objective measures of competence in this field, which can be applied to licensing or certification processes for dental surgeons to ensure patient safety.

METHODS

In an objective structured clinical examination (OSCE), participants placed two simple interrupted sutures across a lower molar socket in different suturing environments: [A] commercial simulator, [B] suturing sponge mounted in a 3D printed model, [C] suturing sponge and [D] pig's jaw. Simulators [A] and [B] were mounted into phantom heads in dental chairs, and [C] and [D] were placed on bench tops. Performance indicators, overall task success, quality of sutures placed, length of suture remaining and time taken, were analysed against participants' characteristics such as previous suturing experience.

RESULTS

Participants (n = 38) took significantly longer to successfully complete the sutures on models mounted in a phantom head. Time points at which each model differentiated between competent (n = 11) and novice (n = 27) participants were as follows: model A (3:26 min), B (2:41), C (2:05) and D (2:06). Model A showed a significant association between task completion and previous suturing experience (p = .006).

CONCLUSION

Suturing simulators can be used to objectively differentiate between novice and competent dental surgeons. Model A demonstrated construct validity, as it reliably identified competence using time and task completion as objectively measurable parameters. Utilising model A, the candidate of unknown ability could be identified as appropriately skilled at intra-oral suturing. To ensure patient safety, further research is needed to identify other objective measures of competence in simulation environments.

An Educational Evaluation of Thiel Cadavers as a Model for Teaching Suturing Skills to Dental Students during the COVID-19 Pandemic

Suturing is an essential skill in dentistry and not one easily acquired. The COVID-19 pandemic prompted a change to the use of Thiel cadavers and online resources with the aim of improving skill acquisition using the best model available. This study investigated the utility of the Thiel cadaver for teaching suturing skills and the potential impact of the lockdown. Fifty-seven year 4 students attended a teaching session. Student views on this teaching were explored via a questionnaire survey and qualitative data collected from a focus group. Data were analysed using an inductive approach. The response rate was 53% (30 students) for the questionnaire with 9 students participating in the focus group. Independent feedback was provided by two members of the teaching staff. Online video resources were very well received by the students with 97% agreeing that it was useful preparation. Ninety percent (90%) thought that the cadaveric model was suitable for this teaching and realistic. Positive emergent themes from the focus group centred on the use of the cadaveric model and the positive and relaxed teaching and learning environment. Staff perceived this model as superior to previously used models. There were no reported negative pandemic impacts and the cadaver model was well received.

Surgical suture course for dental students with the Peyton-4-step approach versus the PDCA cycle using video assisted self-monitoring

BACKGROUND

In this prospective study the Peyton 4-step approach of demonstration-deconstruction-comprehension (verbalization by the learner), and performance by the learner was compared to the PDCA cycle/Deming-Circle (Plan-Do-Check (video assisted self-monitoring)-Act) as a teaching method for surgical suturing and nodes with end performance as the primary objective.

METHODS

Students of the third clinical semester in dental medicine were randomly selected to one of the two teaching methods. They completed a first course during the third clinical semester and a subsequent course during the fourth clinical semester. The focus was on learning surgical suturing techniques. Before the course started a questionnaire was handed out to both groups to evaluate their initial level of performance. Each course ended with a practical test to review the content of the course. The evaluation followed standardized parameters. Some of the test tasks in test one were repeated in test two to measure a horizontal as well as vertical difference in performance level.

RESULTS

53 students (Peyton: n = 28/18 female, 10 male; PDCA: n = 25/14 female, 11 male) have completed both courses. The evaluation of the subjective questionnaires showed that the members of the PDCA-groups achieved a higher subjective increase in performance. The objective results also indicated higher learning success in the PDCA-groups compared to the Peyton-Group.

DISCUSSION/CONCLUSION

This study demonstrated significant learning success for both groups in their own self-assessment as well as in the results of the practical exercises. Subsequently, the superiority of the PDCA cycle could be shown for almost all criteria for surgical suturing techniques. Several studies prioritize the teaching of practical skills according to Peyton and consider step 3 ("comprehension") to be the essential factor. The PDCA cycle, which has its origins in industrial quality management, and its success can be understood from the perspective of learning theory in terms of Jean Piaget's model of equilibration. The necessity of active reflection on the learning content through practice constitutes the key element for transfer into long-term memory.

The effect of microsurgical training on novice medical students’ basic surgical skills—a randomized controlled trial

Background

It has been demonstrated that medical students are capable of learning microsurgical techniques. We hypothesize that microsurgical training might give insight into the importance of delicate tissue handling and correct knot tying that could have a positive influence on macrosurgical skills. The primary aim of this study was to evaluate the effect of microsurgical training on macrosurgical suturing skills in novice medical students.

Subjects and methods

In 2018, 46 novice medical students were enrolled and randomized into two groups. The intervention group received both macro- and microsurgical training and the control group received only microsurgical training. Both groups underwent an assessment test that consisted of macrosurgical tasks of three simple interrupted sutures with a square knot and continuous three-stitch long over-and-over sutures. These tests were individually filmed and assessed using the University of Bergen suturing skills assessment tool (UBAT) and the Objective Structured Assessment of Technical Skill global rating scale (OSATS). Questionnaires regarding future career ambitions and attitudes towards plastic surgery were also completed both prior to and following the tests.

Results

The intervention group needed a longer time to complete the tasks than the control group (12.2 min vs. 9.6 min,p > 0.001), and scored lower on both the UBAT (5.6 vs. 9.0,p > 0.001) and the OSATS (11.1 vs. 13.1,p > 0.001) assessments. The microsurgery course tended to positively influence the students’ attitudes towards a career in plastic surgery (p = 0.002). This study demonstrates poorer macrosurgical skills in the medical students group exposed to microsurgical training. The true effect of microsurgical training warrants further investigation.

Level of evidence: Level I, diagnostic study.

Dental student suturing skills: a multicentre trial of a checklist-based assessment

BACKGROUND

The assessment of clinical skills is essential to determine whether an undergraduate is competent to perform the tasks outlined in the curriculum. Such assessments in dentistry have historically not been subjected to large scale validity and reliability testing due the relatively small student numbers at each institute. The aims of this study were to test the validity and reliability of a standardised, checklist-based, suturing objective structured clinical examination (OSCE) and then to perform a multicentre trial to determine its performance over a large cohort of students.

MATERIALS AND METHODS

A total of seven UK schools agreed to take part in the trial. To test the validity and reliability of the checklist, the examiner at each institution reviewed and scored video footage of 10 students performing the assessment. Each institution then carried out the assessment providing a checklist score and a global score for each of their own students.

RESULTS

The assessment was well received by the staff, with acceptable inter-examiner variability. In total, 496 students completed the suturing OSCE with a success rate of 81% with a variation between schools of between 66% and 96%. A significant correlation was found between the checklist score and the global score (r = 0.361, P = 0.000). No one item on the checklist was found to be a determinant factor in the outcome of the OSCE.

CONCLUSIONS

This checklist-based assessment of suturing skills was found to have face and content validity. Its reliability was promising, but merits further investigation. There may be an argument for the standardisation of the assessment of this core surgical skill throughout several UK-based dental schools.