Study on OsseoSpeed™ Implants in Patients Missing 2-5 Teeth in the Posterior Lower Jaw, Restored With Permanent Teeth Attached 6-7 Weeks Later

This study has been completed.
Information provided by (Responsible Party):
Dentsply Implants Identifier:
First received: July 7, 2008
Last updated: August 22, 2013
Last verified: August 2013

The purpose of the study is to evaluate Astra Tech Dental Implant System, Fixture Osseospeed™, in patients with tooth loss in the posterior mandible in an early loading protocol. Primary objectives are implant stability, marginal bone adaptation and survival rate.

Condition Intervention
Jaw, Edentulous, Partially
Device: OsseoSpeed™

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: An Open, Prospective Study to Evaluate Implant Stability, Marginal Bone Adaptation and the Survival Rate of Astra Tech Dental Implant System, Fixture Osseospeed™, in Patients With Tooth Loss in the Posterior Mandible in an Early Loading Protocol.

Further study details as provided by Dentsply Implants:

Primary Outcome Measures:
  • Implant Survival Rate [ Time Frame: At 5 year follow-up ] [ Designated as safety issue: No ]
    An implant that has failed to osseointegrate, lost its osseointegration or fractured will be considered a failure effective from the date of removal. The survival rate for individual implants will be analyzed at each visit. Cumulative implant survival rate will be calculated using Kaplan-Meier life-table estimation and reported as percentage of survived implants.

  • Implant Stability [ Time Frame: At 1 year follow-up ] [ Designated as safety issue: No ]
    Implant stability will be evaluated using Resonance Frequency Analysis (RFA). The RFA value is automatically translated into an Implant Stability Quotient index (ISQ), which runs from 1 to 100.

  • Marginal Bone Adaptation [ Time Frame: At 5 year follow-up ] [ Designated as safety issue: No ]
    Marginal bone adaptation will be expressed as the distance from the implant reference point to the most coronal bone-to-implant contact on the mesial and distal side of the implant. Bone adaptation in millimeters at follow-up visit will be compared to values obtained Baseline (loading). Positive value indicates bone gain and negative value bone loss.

Enrollment: 45
Study Start Date: February 2004
Primary Completion Date: January 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: A Device: OsseoSpeed™
OsseoSpeed™, all dimensions


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Provision of written informed consent
  • 18 years of age and over
  • Edentulous in the posterior mandible, Kennedy class I or class II. Last natural tooth, or previously restored implant in function is canine or first bicuspid.
  • Deemed by the investigator as likely to present an initially stabile implant situation suitable for early loading

Exclusion Criteria:

  • Untreated caries and/or periodontal disease of residual dentition
  • History of edentulism in the area of implant placement of less than two months
  • Current need for pre-surgical bone or soft tissue augmentation in the planned implant area.
  • History of pre-surgical bone or soft tissue augmentation, within12 months, in the planned implant area.
  • Any systemic or local disease or condition that would compromise post-operative healing and/or osseointegration
  • Need for systemic corticosteroids or any other medication that would compromise post-operative healing and/or osseointegration
  • Present alcohol or drug abuse
  • Unable or unwilling to return for follow-up visits for a period of 5 years
  • Current use of smoking tobacco
  • Pregnancy or lactation at the time of enrollment
  Contacts and Locations
Please refer to this study by its identifier: NCT00711425

United States, Ohio
The Ohio State University, College of Dentistry
Columbus, Ohio, United States, 43210-1241
United States, Washington
University of Washington, Dept. of Restorative Dentistry
Seattle, Washington, United States, 98195
Georg-August-Universität, Göttingen, Abt. Mund-, Keifer-, und Gesicthschirurgie
Göttingen, Germany, 37075
Sponsors and Collaborators
Dentsply Implants
Principal Investigator: Edwin A McGlumphy, D.D.S. The Ohio State University, College of Dentistry
  More Information

Responsible Party: Dentsply Implants Identifier: NCT00711425     History of Changes
Other Study ID Numbers: YA-OSS-0002
Study First Received: July 7, 2008
Results First Received: June 7, 2011
Last Updated: August 22, 2013
Health Authority: United States: Food and Drug Administration
United States: Institutional Review Board
Germany: Ethics Commission

Keywords provided by Dentsply Implants:
Jaw, Edentulous, Partially (posterior mandible)

Additional relevant MeSH terms:
Jaw, Edentulous
Jaw, Edentulous, Partially
Mouth, Edentulous
Jaw Diseases
Musculoskeletal Diseases
Stomatognathic Diseases
Mouth Diseases
Tooth Diseases processed this record on April 14, 2014