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Completed

NCT Number: NCT07228988

Comparison of Patient Satisfaction Between Conventional and Digital Removable Partial Dentures

Study type: cross over within subject clinical trial Primary aim: To compare patient satisfaction among three different RPDs: conventional cast Co-Cr, 3D-printed Co-Cr, and PEEK RPDs.

Secondary aim: To evaluate the impact of these RPDs on oral health-related quality of life and patient preference among these RPDs

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Key information

Conditions

Partially Edentulous Patients Behavior Health Behavior Patient Satisfaction Treatment Adherence and Compliance

Age range

20 year–70 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Faulty of dentistry King Adbulaziz University-KAU, Jeddah, Western, Saudi Arabia

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About this study

A within-subject randomized crossover clinical was conducted at the Faculty of Dentistry, King Abdulaziz University after obtaining an ethical approvalfrom the Faculty Ethical Committee. All patients have signed a consent before being enrolled in the study.

Each participant received three RPDs using three manufacturing techniques (conventional cast Co-Cr, 3D-printed Co-Cr, and milled PEEK) fabricated to the same RPD design specifications. Each RPD worn for 30 days with a one-week washout period between the trial phases.

Participants were selected from partially edentulous patients fulfilling mandibular Kennedy Class I with the first or second premolars as the last abutment teeth bilaterally . Inclusion criteria include good oral hygiene, healthy mucosa, and absence of systemic diseases affecting oral tissues. Exclusion criteria include allergy to materials, poor compliance, or history of temporomandibular disorders.

Sample size estimation is based on detecting a moderate effect size (f = 0.25) with 80% power and α = 0.05, requiring at least 30 participants. To account for possible dropouts, a total of 36 patients was recruited.

Patient satisfaction was assessed using the Visual Analogue Grade (VAG) scale (0-100 mm). The VAG evaluates satisfaction domains such as comfort, esthetics, speech, and mastication, while OHIP-14 measures the impact of oral health on quality of life through 14 questions covering 7 domains. At the end of all the treatment phases participants determined the most preferred denture by answering single choice question of the best overall denture among the three types.

Results will be statistically analysed using one ANOVA test and Tukeys test if the difference between groups is significant

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Partially edentulous patients with mandibular Kennedy class I, last abutment is the first or second premolars, maxillary arch is dentate or restored, good oral hygiene

Exclusion criteria

  • Any systemic diseases that affect oral health, periodontal disease, improper patient compliance, TMD

Treatment and study plan

Conventional cast Cr-Co RPDs

Device

Conventional Cr-Co RPD is constructed by the standard lost wax technique to act as active comparator being the traditional way of RPD construction

3D Printed Cr-Co RPDS

Device

3D Printed Cr-Co was constructed digitally using Laser Melting technology to 3D print the Cr-Co RPD to the same design used with the conventional and the patient used every denture for 30 days with one week wash out

Milled PEEK RPDs

Device

PEEK disc was milled using milling machine to construct RPD framework to the same design as other 2 groups, each patient will use all the 3 dentures for one month but with different sequences, after each type one week washout separated between the groups

Primary outcomes

  1. Patient satisfaction using VAG

    Time frame: Delivery of the first denture type 1st questionnaire 30 days after receiving the first denture 7 days wash out Delivery of the second denture type 2nd questionnaire 30 days after using the denture 7 days wash out Final questionnaire after 30 days

    Visual Analogue Grade 100 mm scale is used to measure patient satisfaction and comfort as zero indicates the worst and 100 indicates the best response

Secondary outcomes

  1. Oral Health related Quality of Life OHRQoL

    Time frame: Delivery of the first denture type 1st questionnaire 30 days after receiving the first denture 7 days wash out Delivery of the second denture type 2nd questionnaire 30 days after using the denture 7 days wash out Final questionnaire after 30 days

    OHIP-14 questionnaire is used to assess the OHRQol

  2. Patient preference

    Time frame: After all the three dentures treatment phase 30 days after the delivery of the last denture according to sequence randomisation Study time line was 6 months from recruitment to final questionnaire

    Single short end question to select one type of denture that was preferred by the patient after using all the three types

Sponsors and collaborators

Lead sponsor

King Abdulaziz University

Other

Registry information

Official study title

Patient-Related Outcomes of Digital and Conventional Removable Partial Dentures..A Crossover Randomised Clinical Trial

Acronym: TRI-RBD

Important dates

Study start
2025
Primary completion
2025
Study completion
2026
First posted
Nov 14, 2025
Registry last updated
Jan 21, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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