Treatment With Fixture Microthread™ in Patients With Poor Bone Quality and no Teeth in the Upper Jaw, When Using Two-Stage Surgery

September 5, 2008 updated by: Dentsply Sirona Implants and Consumables

An Open, Prospective, Multicenter Study to Evaluate Treatment of Edentulous Upper Jaws With an Implant-Supported Prosthesis Retained by Astra Tech Dental Implants, Fixture Micro-Macro in Patients With Poor Bone Quality

The primary objective of the study is to evaluate the long-term survival rate of individual implants and prostheses when treating edentulous upper jaws of poor bone quality with Fixture MicroThread™ (Micro-Macro).

Clinical study recruitment was stopped in year 2000 due to a decision to modify the product under study. This was a result of feedback regarding the subjective feeling during the installation procedure. There were no safety concerns w/r to the study products. Patients already included and treated in the study were monitored for the full duration of the study in accordance with the clinical study protocol.

Study Overview

Status

Terminated

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

23

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

  • Sweden
      • Gävle, Sweden, 801 87
        • Specialisttandvården, Avd för Oral Protetik, Länssjukhuset Gävle-Sandviken
      • Halmstad, Sweden, 301 85
        • Odontologiska kliniken, Länssjukhuset
  • United States
    • Iowa
      • Iowa City, Iowa, United States, 52242-1010
        • University of Iowa, College of Dentistry, Dow's Institute for Dental Research

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

18 years to 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • 18 - 75 years of age
  • Bone quality class III or IV, (according to Lekholm & Zarb16)
  • Willing to give signed informed consent

Exclusion Criteria:

  • Need for bone augmentation of the maxilla
  • Tobacco smoking more than 5 cigarettes/day
  • Any systemic disease or condition that would compromise post-operative healing and/or osseointegration
  • Systemic corticosteroids or any other medication that would compromise post-operative healing and/or osseointegration
  • Unable or unwilling to return for follow-up visits
  • Bruxism or other parafunctional activity

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: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: A
Device: Fixture MicroThread (Micro-Macro)
Fixture MicroThread (Micro-Macro) Ø 3.5 and 4.0 mm in lengths of 9, 11, 13, 15 and 17 mm.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Implant survival
Time Frame: Continuously during 5,5 years after implant placement
Continuously during 5,5 years after implant placement

Collaborators and Investigators

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

Sponsor

Dentsply Sirona Implants and Consumables

Investigators

  • Principal Investigator: Clark Stanford, D.D.S., Ph.D., University of Iowa, College of Dentistry, Dow's Institute for Dental Research

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, 1999

Primary Completion (Actual)

October 1, 2006

Study Registration Dates

First Submitted

September 5, 2008

First Submitted That Met QC Criteria

September 5, 2008

First Posted (Estimate)

September 8, 2008

Study Record Updates

Last Update Posted (Estimate)

September 8, 2008

Last Update Submitted That Met QC Criteria

September 5, 2008

Last Verified

September 1, 2008

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • YA-MMF-0003

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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