Denne side blev automatisk oversat, og nøjagtigheden af ​​oversættelsen er ikke garanteret. Der henvises til engelsk version for en kildetekst.

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

19. september 2026 opdateret af: Dr. Fatima Shakeel, Watim Medical & Dental College

Comparison of Open Mouth Vs Closed Mouth Edentulous Impression Technique: A Hospital Based Study

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.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

In the open mouth group, border molding and the wash impression are made with the patient's mouth open and no occlusal contact. In the closed mouth group, occlusal rims are attached to the custom trays at a predetermined occlusal vertical dimension, and the impression is made while the patient closes and performs functional movements. Jaw relations, try-in, and insertion follow the same protocol for both groups. Retention is scored separately for the maxillary and mandibular dentures, with a score of 2 or 3 counted as adequate. Satisfaction scores range from 5 to 25, and a score of 16 or above counts as satisfied.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

88

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • Punjab Province
      • Rawalpindi, Punjab Province, Pakistan, 46000
        • Department of Prosthodontics, Watim Medical and Dental College, Rawat, Rawalpindi, Punjab, Pakistan
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 70 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

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

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Aktiv komparator: Group A: Open Mouth Technique

Final impressions made in custom trays with sectional border molding using low fusing impression compound and a zinc oxide eugenol wash, with the mouth open and no occlusal contact.

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.

Andre navne:
  • Open mouth functional impression
  • Conventional border molded impression
Aktiv komparator: Group B: Closed Mouth Technique

Final impressions made in custom trays with attached occlusal rims set to a predetermined vertical dimension. Border molding and the wash impression are made while the patient closes into occlusion and performs functional movements.

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.

Andre navne:
  • Closed mouth functional impression
  • Functional impression under occlusal loading

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Adequate retention of maxillary denture
Tidsramme: 6 weeks after denture insertion

Kapur index score (0 nil, 1 poor, 2 fair, 3 good) assessed by a blinded examiner. A score of 2 or 3 is adequate and 0 or 1 is inadequate.

6 weeks after denture insertion

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Adequate retention of mandibular denture
Tidsramme: 6 weeks after denture insertion

Kapur index score assessed the same way as the maxillary denture.

6 weeks after denture insertion
Patient satisfaction
Tidsramme: 6 weeks after denture insertion

5-item Likert questionnaire covering retention, comfort, mastication, phonetics, and overall satisfaction, with a total score of 5 to 25. A score of 16 or above counts as satisfied.

6 weeks after denture insertion

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Fatima Shakeel, BDS, Watim Medical and Dental College
  • Studieleder: Zarah Afreen, BDS, FCPS, Watim Medical and Dental College

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. marts 2027

Primær færdiggørelse (Anslået)

1. juni 2027

Studieafslutning (Anslået)

1. juni 2027

Datoer for studieregistrering

Først indsendt

15. september 2026

Først indsendt, der opfyldte QC-kriterier

15. september 2026

Først opslået (Faktiske)

21. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

23. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

19. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • WMDC/R&D(ERB)/2025/241

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

Individual participant data will not be shared publicly to protect participant confidentiality. Summary results will be published in a peer-reviewed journal.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .