Turkish Journal of Orthodontics
Original Article

An Updated Comparison of Current Impression Techniques Regarding Time, Comfort, Anxiety, and Preference: A Randomized Crossover Trial


Department of Orthodontics, Yeditepe University Faculty of Dentistry, İstanbul, Turkey


Department of Orthodontics, Biruni University Faculty of Dentistry, İstanbul, Turkey


Department of Paediatric Dentistry, Istanbul Okan University Faculty of Dentistry, İstanbul, Turkey

Turk J Orthod 2021; 34: 227-233
DOI: 10.5152/TurkJOrthod.2021.21025
Read: 306 Downloads: 137 Published: 01 December 2021

Objective: To compare digital and conventional impressions in terms of impression time, and comfort, anxiety and preference of the patients.

Methods: Digital scans (Trios 3 Cart) and conventional impressions (irreversible hydrocolloid material, hand-mixed) were randomly performed on 39 patients by a single experienced operator in 14-21 day intervals (cross-over design). Impression time, comfort score with visual analog scale (VAS), anxiety level with State-Trait Anxiety Scale, and preference with a questionnaire were recorded. Two techniques were compared with the independent t-test in terms of time, comfort, and anxiety. Patient’-operator’ assessment and time-comfort relationship were calculated using Pearson correlation test.

Results: No statistical difference was found between the two impression techniques in terms of time (P = .231). The digital technique was found to be more comfortable than the conventional technique in both operators’ and patients’ comfort scores (P < .001). There was no statistical difference between two techniques with regards to anxiety (P = .668). Patients’ and operators’ comfort scores showed a strong correlation (P < .001), but no correlation was found between comfort and time (P > .05).

Conclusion: Digital scan and conventional impression were similar in terms of impression time, and anxiety of patients. Conversely, patients were more satisfied with the digital technique and preferred it. 

Cite this article as: Yılmaz H, Konca FA, Aydın MN. An updated comparison of current impression techniques regarding time, comfort, anxiety, and preference: A randomized crossover trial. Turk J Orthod. 2021; 34(4): 227-233.

EISSN 2148-9505