Dental Impression Techniques
Conditions
Keywords
Intraoral Scanning, Digital Dental Impression, Alginate Impression, Procedure Time, Patient Comfort, Dental Students
Brief summary
Dental impressions are used to create a record of a person's teeth and oral structures. Conventional impressions are made using impression material placed in a tray, whereas digital impressions are obtained using an intraoral scanner. This randomized clinical trial compared conventional alginate impressions with digital intraoral scanning using the TRIOS 3 and Medit i700 scanners among dental students aged 18 to 24 years. Participants were randomly assigned to one of the three impression techniques. Each participant underwent recording of both the upper and lower dental arches using the assigned technique. The study primarily compared the chairside time required for each technique and the participants' experience immediately after the procedure. Comfort, nausea, breathing, pain, dry-mouth sensation, perceived procedure speed, overall satisfaction, and preference for conventional or digital impressions were also evaluated.
Interventions
PROCEDUREConventional Alginate Impression
Maxillary and mandibular conventional impressions were obtained using Tropical alginate impression material and stock trays. The alginate was mixed, placed in the impression tray, and used according to the manufacturer's instructions.
PROCEDURETRIOS 3 Intraoral Scanner
Maxillary and mandibular full-arch digital impressions were obtained using the TRIOS 3 intraoral scanner according to the manufacturer's recommended scanning protocol. A bite-registration scan was also obtained.
PROCEDUREMedit i700 Intraoral Scanner
Maxillary and mandibular full-arch digital impressions were obtained using the Medit i700 intraoral scanner according to the manufacturer's recommended scanning protocol. A bite-registration scan was also obtained.
Sponsors
Hue University of Medicine and Pharmacy
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 24 Years
Healthy volunteers
Yes
Inclusion criteria
* Undergraduate dental students at the University of Medicine and Pharmacy, Hue University. * Aged 18 to 24 years. * Willing to undergo one maxillary and one mandibular dental impression using the assigned technique. * Willing and able to complete the study questionnaire. * Provided written informed consent.
Exclusion criteria
* Currently undergoing orthodontic treatment. * Presence of a systemic disease or acute condition that limited the ability to cooperate or increased the risk of discomfort during impression taking or intraoral scanning, including an acute respiratory disorder or frequent vomiting. * Limited mouth opening or an oral and maxillofacial condition that prevented correct impression-tray seating or scanner-tip placement according to the study protocol. * A maxillofacial abnormality that markedly affected the procedure or caused significant recording distortion. * An excessive gag reflex that prevented completion of the assigned procedure.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Total Chairside Procedure Time | During the assigned impression procedure at the single study visit | Total chairside procedure time was measured in seconds using a digital stopwatch and calculated as the sum of the recorded procedural stages. For the conventional alginate group, the stages included maxillary mixing, maxillary impression taking, mandibular mixing, and mandibular impression taking. For the digital groups, the stages included patient and case information entry, maxillary scanning, and mandibular scanning. Bite-registration time was excluded from the total procedure time because there was no equivalent stage in the conventional alginate workflow. |
| Patient-Reported Overall Comfort During the Impression Procedure | Immediately after completion of the assigned impression procedure | Overall comfort during the assigned impression procedure was assessed immediately after the procedure using a 0-to-100 visual analogue scale. Higher scores indicated greater comfort. |
Countries
Vietnam
Contacts
PRINCIPAL_INVESTIGATORVan Nhat Thang Le, DDS PhD
Faculty of Odonto-Stomatology, University of Medicine and Pharmacy, Hue University
Outcome results
None listed