LOGIN
 
Share Page:
Back

Volume 10 , Issue 1
January/February 1995

Pages 33-42


Factors Related to Success and Failure Rates at 3-Year Follow-up in a Multicenter Study of Overdentures Supported by Brånemark Implants

John E. Hutton, DDS, MS, MPH/M. Robin Heath, PhD, BDS, FDSRCS/ John Y. Chai, BDS, MS/Joseph Harnett, DDS/Torsten Jemt, DDS, PhD/ Richard B. Johns, PhD, LDSRCS/Samuel McKenna, DDS, MD/ David C. McNamara, BDSc, MDS, PhD/ Daniel van Steenberghe, MD, PhD/ Ross Taylor, BDS, MDS/ Roger M. Watson, BDS, MDS, FDSRCS/ Irene Herrmann, DDS


PMID: 7615315

An international prospective study of Brånemark implants retaining overdentures was conducted at nine clinical centers. One hundred thirty-three subjects were recruited in a 12-month period and provided with 510 implants, 117 of which were in maxillae and 393 were in mandibles. This study reports the 3-year follow-up status of 120 overdentures and 444 implants. There were 11 overdenture failures (9.2%). Maxillary overdenture failure rates (27.6%) were nearly nine times greater than mandibular overdenture failure rates (3.3%). Maxillary overdenture treatment was less successful than previously reported fixed implant-supported restorations. However, their mandibular counterparts had success rates slightly higher than those reported for fixed implant-supported restorations. At 3 years, 150 implants remained submerged and 66 implants had been withdrawn because the subjects discontinued study participation. Eleven mandibular and 29 maxillary implants had failed and had been removed from 21 subjects. Logistic regression with forward model selection indicated that one two-way interaction was significantly related to implant failure. At highest risk were the subjects who possessed dental arches with bone quantity E and bone quality 4. Subjects with one implant failure were likely to have more than one failure. The Generalized Estimating Equation was used to adjust for the cluster effect in this population because multiple implants (2 to 6) were placed and evaluated in each of the 133 subjects.

Key words: Brånemark implants, multicenter study, overdentures


Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.

 

© 2014 Quintessence Publishing Co, Inc JOMI Home
Current Issue
Ahead of Print
Archive
Author Guidelines
About
Accepted Manuscripts
Submission Form
Submit
Reprints
Permission
Advertising
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us
Help