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Comparison of Open-Mouth and Closed-Mouth Impression Techniques for Complete Dentures
Sponsor: Watim Medical & Dental College
Summary
This randomized controlled trial compares two final impression techniques for complete dentures, the open mouth technique and the closed mouth technique. Completely edentulous adults with well-formed ridges will be randomly assigned 1:1 to one of the two techniques. All dentures will be made by a single operator using the same materials and laboratory. Six weeks after insertion, an examiner blinded to group allocation will assess denture retention using the Kapur index, and patient satisfaction will be recorded using a 5-item Likert questionnaire.
Official title: Comparison of Open Mouth Vs Closed Mouth Edentulous Impression Technique: A Hospital Based Study
Key Details
Gender
All
Age Range
18 Years - 70 Years
Study Type
INTERVENTIONAL
Enrollment
88
Start Date
2027-03
Completion Date
2027-06
Last Updated
2026-09-23
Healthy Volunteers
No
Conditions
Interventions
Open mouth impression technique
Secondary impression of the edentulous arch made in a custom acrylic tray. Border molding is done in sections with low fusing impression compound, followed by a zinc oxide eugenol wash impression. The clinician manipulates the tissues and the patient performs functional movements, with the mouth open and no occlusal contact. All steps are done by a single trained operator using the same materials and laboratory as the comparison group.
Closed mouth impression technique
Secondary impression made in custom trays with occlusal rims attached and adjusted to a predetermined occlusal vertical dimension. Maxillary and mandibular trays are inserted together. Border molding with low fusing impression compound and a zinc oxide eugenol wash impression are made while the patient closes into occlusion and performs functional movements, recording the denture bearing areas under simulated functional load. All steps are done by a single trained operator using the same materials and laboratory as the comparison group.
Locations (1)
Department of Prosthodontics, Watim Medical and Dental College, Rawat, Rawalpindi, Punjab, Pakistan
Rawalpindi, Punjab Province, Pakistan