Comparison of Open-Mouth and Closed-Mouth Impression Techniques for Complete Dentures

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.

Inclusion Criteria: * Adults aged 18 to 70 years * Completely edentulous in both maxilla and mandible for at least six months, confirmed by clinical examination and orthopantomogram * Well-formed ridges, ACP classification Class I or Class II Exclusion Criteria: * Flabby or hypermobile ridges * Atrophic ridges * Ridges with bony exostosis * Active oral pathology * History of radiotherapy to head and neck * Uncontrolled systemic disease * Neuromuscular or neurological disorders