- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03272828
Mandibular Overdenture Clinical Trial Comparing Parallel Sided and Tapered Dental Implants
December 19, 2023 updated by: Mats Kronstrom, University of Washington
A Prospective Randomized Study on the Immediate Loading of Mandibular Overdentures Supported by Parallel Sided or Tapered Dental Titanium Implants
The purpose of the study is to compare two different types of dental implants which will be used to support/retain a removable denture in the edentulous mandible.
Subjects will have one implant placed in the midline of the mandible after which the patient's existing denture will be modified to fit the implant.
The population of this study consists of healthy edentulous individuals 20-75 years of age who have complete dentures in the upper and lower arch.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
Titanium dental implants have been frequently used in the rehabilitation of edentulous patients.
Implants may provide adequate denture stability, improve oral function and oral health related quality of life.
There is evidence that implants supporting fixed and removable prostheses have excellent long term success rates.
Factors such as implant surface characteristics, length, diameter and shape (parallel sided or tapered) may play and important role for the outcome of the treatment especially when the immediate loading protocol (loading of the implant the same day it is surgically placed) is utilized.
There are reports indicating that dental implants placed according to the immediate loading protocol can be used to support removable prostheses in the mandible.
Such protocol would minimize the number of surgical procedures and significantly shorten the overall treatment time.
Further, increased oral health related quality of life has been reported from studies on mandibular implant overdentures.
Traditionally two implants have been suggested for the support of a mandibular overdenture.
However, high patient satisfaction rates and appropriate denture retention have been reported among patients with a single implant placed in the mid-line.
It is also important to further evaluate and compare various implant designs to determine clinical outcomes.
The two dominating types of implant body design on the market are the parallel-sided (straight) and the tapered (conical) shaped.
Both implants have similar threads, and the surgical procedure for placing the implants in the bone tissue is similar, but the drills used have a slightly different design and shape.
There are today no randomized controlled studies evaluating differences in outcomes with respect to the external implant design i.e. parallel sided or tapered.
Study Type
Interventional
Enrollment (Actual)
48
Phase
- 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
-
-
Washington
-
Seattle, Washington, United States, 98025
- the Regional Research Clinic, School of Dentistry at the University of Washington
-
-
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
20 years to 75 years (Adult, Older Adult)
Accepts Healthy Volunteers
Yes
Description
Inclusion Criteria:
- Be between 20 and 75 years of age
- Be edentulous and have both upper and lower complete dentures
- Present with American Society of Anesthesiologists (ASA) I or ASA II and no medical contraindications to implant treatment
- Have adequate bone volume for placement of one (1) 4.0 mm diameter titanium dental implant with a minimum length of 10 mm in the symphyseal area (=midline) of the anterior mandible
- Show absence of pathology such as cysts, infections in the gum tissue or bone and remaining roots.
- Be able to understand the procedures and have a jaw opening range of 30 mm or more
Exclusion Criteria:
- Ongoing chemotherapy
- Previous radiation to head/neck
- Ongoing corticosteroid medication
- Ongoing blood thinner medication
- Ongoing medication with psychopharmacological drugs
- History of alcohol/drug abuse
- Remaining teeth/root tips
- Poor quality /fractured/severely worn dentures that cannot be modified to fit the implant
- Jaw opening range less than 30 mm
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 |
Intervention / Treatment |
---|---|
Active Comparator: Parallel sided implant Group
A Parallel sided titanium dental implant will be placed in the edentulous mandible.
|
|
Active Comparator: Tapered shaped implant Group
A tapered shaped titanium dental implant will be placed in the edentulous mandible.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Difference in Implant Failure Rate Between Parallel Sided and Tapered Dental Implants at 5 Years
Time Frame: From implant placement (baseline) to 5 years
|
Implant failure defined as an implant that has lost osseointegration and no longer is stable and supported by the surrounding bone (no bone to implant contact).
|
From implant placement (baseline) to 5 years
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Implant Stability Quotient (ISQ) Measured at 5 Years
Time Frame: 5 years
|
The implant stability quotient (ISQ) value is a measurement of the mechanical implant stability in the bone and is measured directly after surgical implant placement and then at follow-ups.
It is obtained by resonance frequency with a device that sends out a signal to a metal rod placed in the implant and then reads the value of the signal when it bounces back.
The value ranges from 0 to 100 with higher values indicating better bone-to-implant contact and greater stability.
|
5 years
|
Bone Loss Measurement at 5 Years
Time Frame: From implant placement (baseline) to 5 years
|
The measure of bone loss in millimeters (mm) around the implant at 5 years compared to bone height at baseline.
Changes in bone level are measured on intraoral radiographs and compared with the bone level measure immediately after surgical implant placement (baseline).
The implant platform was used as the reference point and measurements of the bone were made to the nearest thread.
The bone level is measured on both sides (mesial & distal) of the implant using the thread on the implant as reference.
The distance between the threads is 0.6 mm.
|
From implant placement (baseline) to 5 years
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Mats Kronstrom, DDS, PhD, University of Washington
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.
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 (Actual)
June 15, 2012
Primary Completion (Actual)
December 30, 2022
Study Completion (Actual)
August 3, 2023
Study Registration Dates
First Submitted
September 2, 2017
First Submitted That Met QC Criteria
September 2, 2017
First Posted (Actual)
September 6, 2017
Study Record Updates
Last Update Posted (Actual)
January 9, 2024
Last Update Submitted That Met QC Criteria
December 19, 2023
Last Verified
December 1, 2023
More Information
Terms related to this study
Other Study ID Numbers
- STUDY00003063
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
IPD Plan Description
Individual Participant Data (IPD) will not be shared with other researchers
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
Yes
product manufactured in and exported from the U.S.
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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