Mandibular Implants in Elderly Patients

April 27, 2021 updated by: Frauke Müller, University of Geneva, Switzerland

Implant-supported Mandibular Overdentures in Very Old Adults - a Randomized Controlled Trial

The purpose of this study is to investigate denture satisfaction following the conversion of existing mandibular complete dentures to implant-overdentures (IOD) in very old edentulous patients who depend on help for activities of daily living (ADL) and evaluate secondary endpoints such as functional, structural, nutritional, cognitive and patient-centered outcome measures.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
45

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Switzerland
      • Geneva, Switzerland, 1205
        • University of Geneva

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

75 years and older (Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • 75 years or older
  • living institutionalized or receiving help for the ADL
  • edentulous
  • wearing complete dentures
  • the lower denture had to cause discomfort to the degree that the patients were seeking treatment

Exclusion Criteria:

  • severe clinical depression
  • dementia
  • poorly controlled diabetes
  • immunosuppression
  • treatment with bisphosphonates
  • condition precluding the surgical intervention for implant placement

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

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: implant placement
insertion of 2 interforaminal mandibular implants and conversion of the lower complete denture to an implant-overdenture
Device: Implant placement
Participants received two Straumann Standard Implants® in the interforaminal region using the recommended surgical protocol. The implants were loaded using Locator® attachments after six to eight weeks healing time by transforming the existing lower denture to an IOD.
Other Names:
  • Straumann Standard Implants® (SLA surface, 8mm length, RN, 4.1mm diameter)
  • Locator® attachments (Zest Anchors: Escondido, CA, USA)
Active Comparator: denture reline
conventional reline of mandibular complete denture
Procedure: Conventional reline
conventional reline of the existing mandibular complete denture

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change from Baseline in Denture satisfaction
Time Frame: at 3, 12, 24 and 36 months
VAS-scale score to evaluate the subjective satisfaction with the denture
at 3, 12, 24 and 36 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change from Baseline in OHRQoL
Time Frame: at 3, 12, 24 adn 36 months
OHIP-Edent questionnaire, 20 questions
at 3, 12, 24 adn 36 months
Change from Baseline in cognitive function
Time Frame: at 12, 24 and 36 months
Mini-Mental State Examination, to evaluate cognitive function (Folstein et al. 1975) Trail-making test A and B Verbal fluency test
at 12, 24 and 36 months
Change from Baseline in Independence
Time Frame: at 12, 24 and 36 months
IADL Instrumental Activities of Daily Living Scale (Lawton and Brody, 1969) MIF Measure of functional independence
at 12, 24 and 36 months
Change from Baseline in MNA
Time Frame: at 3, 12, 24 and 36 months
Mini-nutritional Assessement questionnaire (Guigoz 1994)
at 3, 12, 24 and 36 months
Change from Baseline in Blood markers
Time Frame: at 3, 12, 24 and 36 months
Albumin, Folic acid, Vitamin B12 (VitB12), Hemoglobin (Hb), C-reactive protein (CRP)
at 3, 12, 24 and 36 months
Change from Baseline in BMI
Time Frame: at 12, 24 and 36 months
Body Mass Index kg/m2
at 12, 24 and 36 months
Change from Insertion in implant survival
Time Frame: at 3, 12, 24 and 36 months
inserted implants in vivo
at 3, 12, 24 and 36 months
Change from Insertion in Pocket depth
Time Frame: at 3, 12, 24 and 36 months
mesial and distal peri-implant probing depth
at 3, 12, 24 and 36 months
Change from Insertion in Plaque index
Time Frame: at 3, 12, 24 and 36 months
Plaque index on implants (Silness & Loe 1963) Denture plaque index
at 3, 12, 24 and 36 months
Change from Insertion in peri-implant bone loss
Time Frame: at 3, 12, 24 and 36 months
mesial and distal peri-implant bone loss, as evaluated on intraoral radiographs or OPTs
at 3, 12, 24 and 36 months
Change from Baseline in Chewing efficiency
Time Frame: at Intervention, 3, 12, 24 and 36 months
two color mixing test with bi-colored chewing gum (Schimmel et al 2007)
at Intervention, 3, 12, 24 and 36 months
Change from Baseline in Maximum bite force
Time Frame: at Intervention, 3, 12, 24 and 36 months
unilateral maximal bite force measured with force gauge
at Intervention, 3, 12, 24 and 36 months
Change from Baseline in Stimulated Saliva Flow Rate
Time Frame: at Intervention, 3, 12, 24 and 36 months
whole saliva collected after chewing wax for 2 minutes on one side
at Intervention, 3, 12, 24 and 36 months
Changes from Baseline in Masseter Muscle Thickness
Time Frame: at 3, 12, 24 and 36 months
ultrasound measurements of the masseter muscle thickness in contracted and relaxed state
at 3, 12, 24 and 36 months

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Geneva, Switzerland

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Frauke Müller, Prof. Dr. med. dent., University of Geneva

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 1, 2007

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 1, 2012

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 1, 2019

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 16, 2013

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 20, 2013

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 23, 2013

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
April 30, 2021

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 27, 2021

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
April 1, 2021

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • MDGPA_02
  • ITI_458_2006 (Other Grant/Funding Number: International Team of Implantology ITI)

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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