a 10-year Follow-up Study of a Randomized Clinical Trial

March 27, 2017 updated by: Yasuhiko Kawai, Nihon University

Comparison of Two Different Procedures Fabrication of Conventional Complete Dentures: a 10-year Follow-up Study of a Randomized Clinical Trial

In this study, the investigators propose a 10-year follow up study of participants in a randomized clinical trial to compare the oral health-related quality of life (OHRQoL), as well as general and related satisfaction of conventional complete dentures fabricated using two different procedures.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Study design A 10-year follow-up study of a randomized controlled clinical trial (RCT) carried out from 2001 to 2003, including assessment of patient satisfaction, denture repair/replacement and OHRQoL. Data will be gathered through telephone interviews. Since the contacts were last used a decade ago, the phone number may have been changed, but we will make every effort to find new numbers for any participant those contact information is no longer valid .

Subjects Patients who participated and completed 6-month follow-ups in the RCT (T group: 50, and S group: 54; total 104 subjects) will be contacted by telephone.

Interviews and blinding Potential subjects will be told that we are investigating conditions of their dentures 10-years after the delivery and that we will ask general questions, as well as for their ratings of satisfaction and OHRQoL regarding their dentures. After this, the subjects will be asked whether they are willing to respond to the interviews. If they agree, the interviewer will ask the questions according to a flow chart (Appendix 1a, b). The subjects will not be told to which group they had been assigned, and a blinded research assistant will carry out the interviews and data gathering. The research assistant worked with these participants during the active study 10 years before. Patients will be excluded if they cannot respond properly to the questions.

Questionnaires Data will be gathered by four questionnaires: socio-demographic (Q1: Appendix 2), denture history/oral health (Q2: Appendix 3), general and related satisfaction outcomes by answering VAS (visual analog scale) scores out of 100 (Q3: Appendix 4), and OHQOL measures (OHIP-EDENT) 12, 13 (Q4: Appendix 5).

Analysis Denture history The difference in number of people who keep and use the dentures at 10 years will be calculated in percentages. A Chi-squared test will be employed for the statistical analyses. Finally, the prevalence of problems associated with the dentures will be calculated.

Satisfaction The differences between the treatment groups in their general satisfaction ratings on 100mm VAS after the prostheses are worn for 10 years. A two-sample independent t-test will be employed. VAS items of comfort, stability, esthetics, retention, function and ease of cleaning are also included. These will be compared between the groups using t-tests.

OHRQoL OHIP-EDENT consists of 19 statements and responses varying from 0 to 4 on a Likert scale. The possible range between 0 and 76 will be derived individually and compared between the two groups. A two-sample independent t-test will be employed.

Study Type

Observational

Enrollment (Actual)

104

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients who participated and completed 6-month follow-ups in the RCT (T group: 50, and S group: 54; total 104 subjects) will be contacted by telephone.

Description

Inclusion Criteria:

  • Who can be contact with telephone call and accept the interview

Exclusion Criteria:

  • The line is closed, no response, who have deceased.
  • Refused to answer

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Simplified
Complete denture fabricated by simple way than the textbook traditional method.
Other: complete denture
Comparison of different procedures
Traditional
Complete denture fabricated by textbook discribed traditional method.
Other: complete denture
Comparison of different procedures

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Patient satisfaction
Time Frame: 10years
10years

Secondary Outcome Measures

Outcome Measure
Time Frame
Denture repair/replacement
Time Frame: 10years
10years
Oral Health related Quality of Life
Time Frame: 10years
10years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Nihon University

Collaborators

McGill University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2012

Primary Completion (Actual)

January 1, 2014

Study Completion (Actual)

January 1, 2014

Study Registration Dates

First Submitted

November 9, 2014

First Submitted That Met QC Criteria

November 12, 2014

First Posted (Estimate)

November 13, 2014

Study Record Updates

Last Update Posted (Actual)

March 29, 2017

Last Update Submitted That Met QC Criteria

March 27, 2017

Last Verified

March 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • A09-E71-12B

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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