Comparison Between Neutral Zone and Admixed Impression Techniques for Atrophic Mandibular Ridges

NCT07892716 | Not Yet Recruiting

• 1 other identifier: WMDC/R&D(ERB)/2025/244
• Study Type: interventional
• Target: 60
• Locations: 0 countries
• Sites: N/A

Brief Summary

This study aims to compare two impression techniques, the neutral zone technique and the admixed impression technique, for making complete dentures in patients with atrophic mandibular ridges (severely resorbed lower jaw ridges). A total of 60 patients aged 50-70 years will be included and divided into two groups of 30 patients each. One group will receive complete dentures made using the neutral zone technique, while the other group will receive complete dentures made using the admixed impression technique. Patient comfort during impression making will be assessed and compared between the two techniques to determine which technique provides greater comfort for patients with atrophic mandibular ridges.

Conditions

Atrophic Mandibular Ridge in Edentulous Patients

Keywords

neutral zone technique; admixed impression technique; atrophic manibular ridge; complete denture; patient comfort; edentulous mandible

Outcome Measures

Primary Outcomes (1)

• Mean total patient comfort score during impression making

  Patient comfort during the impression procedure will be assessed using a structured four item questionnaire evaluating difficulty in tongue movements,irritation during impression,difficulty in following the dentists instructions and duration of the impression procedure.Each item will be scored on a 5 point likert scale and the four scores will be summed to obtain total comfort score ranging from 4 to 20.Higher scores indicate greater patient comfort.The mean total comfort scores will be compared between neutral zone and admixed impression teachnique groups.

  Immediately after completion of the impression procedure

Study Arms (2)

Neutral zone technique

EXPERIMENTAL

Paients will undergo mandibular impression making using neutral zone technique for the management of atrophic mandibular ridges.Patient comfort during the impression procedure will be assessed using a structured four item questionnaire

Procedure: Neutral zone impression technique

Admixed impression technique

ACTIVE COMPARATOR

Patients will undergo mandibular impression making using the admixed impression technique for management of atrophic mandiular ridges.Patient comfort during the impression will be assessed using same structure four item questionnaire.

Procedure: Admixed impression technique

Interventions

Neutral zone impression technique PROCEDURE

A denture impressin technique used for fabrication of mandibular complete dentures in patients with atrophic mandibular ridges.The technique records the neutral zone to guide denture tooth arrangement and polished surface.

Neutral zone technique

Admixed impression technique PROCEDURE

admixed impression technique for fabrication of complete denture in atrophic mandibular ridges

Admixed impression technique

Eligibility Criteria

• Age: 50 Years - 70 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Patients aged 50 to 70 years Completely edentulous in lower jaw Atrophic mandibular ridge as per operational definition Patients coming for new complete denture or havin ill fitting denture

You may not qualify if:

• History of trauma or surgery history of neuromuscular disorders affecting tongue,lips or cheeks history of oral infections or untreated oral lesions history of systemic conditions where denture impression is not advised history of suitabilty for implant supported prosthesis history of poor cooperation or unable to follow dentists instruction during impression

Sponsors & Collaborators

• Watim Medical & Dental College: lead

Related Publications (1)

• Raja IM, Hosein M, Khan MA. Comparison between the neutral zone and admixed impression techniques in the management of atrophic mandibular ridges. Med Forum. 2022;33(2):109-113.

  BACKGROUND

Central Study Contacts

Seema kazim, BDS

CONTACT

0092 3435562364; skazim952@gmail.com

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Post graduate resident in prosthodontics

Model Details: People will be assigned to one of two parallel groups.Group A will receive the neutral zone impression technique and Group B will receive the admixed impression technique. Outcomes will be compared between the two groups.

Study Record Dates

• First Submitted: October 18, 2026
• First Posted: October 23, 2026
• Study Start (Estimated): September 1, 2027
• Primary Completion (Estimated): December 1, 2027
• Study Completion (Estimated): March 1, 2028
• Last Updated: October 23, 2026

Record last verified: 2026-10

Data Sharing

• IPD Sharing: Will not share