Study to Evaluate an Implant With a Sloped Top in Patients With a Sloped Jaw Bone

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00807456
Recruitment Status : Completed
First Posted : December 12, 2008
Results First Posted : May 30, 2016
Last Update Posted : May 30, 2016
Information provided by (Responsible Party):
Dentsply Sirona Implants

Brief Summary:

The study aims to evaluate maintenance of lingual/palatinal marginal bone with the (ASTRA TECH Implant System) OsseoSpeed™ Profile implant in sites where the alveolar crest anatomy is sloped in a lingual to buccal direction.

The hypothesis is that the sloped marginal contour of the implant will help preserve the lingual/palatinal marginal bone.

Condition or disease Intervention/treatment Phase
Edentulism Device: ASTRA TECH Implant System, OsseoSpeed™ Not Applicable

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 65 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Prospective, Open, Single Arm, Multi-center Study to Evaluate Maintenance of Lingual Bone in Healed Ridges With the ASTRA TECH Implant System, OsseoSpeed™ Profile Implant. A 3-year Follow-up Study
Study Start Date : November 2008
Actual Primary Completion Date : June 2013

Arm Intervention/treatment
Experimental: ASTRA TECH Implant System, OsseoSpeed™ Device: ASTRA TECH Implant System, OsseoSpeed™
ASTRA TECH Implant System, OsseoSpeed™ Profile implants: Ø4.5, 5.0, 5.0S mm in lengths of 9, 11, 13, 15mm.

Primary Outcome Measures :
  1. Bone Level Changes at the Lingual Aspect From Implant Placement (Baseline) to 16 Weeks After Implant Placement [ Time Frame: At baseline and 16 weeks ]
    Clinical measurements after implant installation and after 16 weeks to determine bone levels at the buccal and lingual aspects in relation to a fixed landmark on the implant (the rim (R), i.e. the interface between the micro-threaded part and the shoulder at the marginal portion of the implants.The assessments were made using a periodontal probe and distances were measured to the nearest 0.5 mm. Negative value denotes loss of bone.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   18 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Provision of informed consent
  • Aged 18-70 years at enrolment
  • A lingual-buccal difference in bone height between 2.0-5.0 mm at the implant site
  • History of edentulism in the study area of at least 3 months
  • Presence of alveolar bone crest dimensions judged by the investigator to allow >1mm of bone circumferential to the implant after implant placement.
  • In need for a single implant replacing a missing tooth in any location with an adjacent natural tooth mesially, and an adjacent natural tooth or edentulous space distally to the planned implant position (i.e. no existing or planned implant adjacent to the planned study implant position)
  • Deemed by the investigator as likely to present an initially stable implant situation

Exclusion Criteria:

  • Uncontrolled pathological processes in the oral cavity
  • Known or suspected current malignancy
  • History of radiation therapy in the head and neck region
  • History of chemotherapy within 5 years prior to surgery
  • Systemic or local disease or condition that would compromise post-operative healing and/or osseointegration
  • Uncontrolled diabetes mellitus
  • Corticosteroids or any other medication that would compromise post-operative healing and/or osseointegration
  • Smoking more than 10 cigarettes per day
  • Present alcohol and/or drug abuse
  • Current need for bone grafting in the planned implant area
  • Previous enrolment in the present study
  • Simultaneous participation in another clinical study or participation in a clinical study during the last 6 months
  • Involvement in the planning and conduct of the study (applies to both Astra Tech staff or staff at the study site)
  • Unlikely to be able to comply with study procedures, as judged by the investigator

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00807456

United States, Florida
Department of Periodontology, College of Dental Medicine, Nova Southeastern University
Fort Lauderdale, Florida, United States, 33328-2018
United States, Pennsylvania
Department of Periodontics, Robert Schattner Center, School of Dental Medicine, University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
Medizinische Hochschule Hannover
Hannover, Germany, D-30625
Praxis Dr Robert Nölken
Lindau, Germany, D-88131
Studio Dentistico Donati
Perugia, Italy, IT-06121
Sponsors and Collaborators
Dentsply Sirona Implants
Study Chair: Tord Berglundh, Prof. Department of Periodontology, Sahlgrenska Academy at University of Gothenburg

Publications of Results:
Responsible Party: Dentsply Sirona Implants Identifier: NCT00807456     History of Changes
Other Study ID Numbers: YA-PRO-0001
First Posted: December 12, 2008    Key Record Dates
Results First Posted: May 30, 2016
Last Update Posted: May 30, 2016
Last Verified: April 2016