HOME HELP CONTACT US SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:
Sign In to gain access to subscriptions and/or personal tools.

This Article Full Text Full Text (PDF) All Versions of this Article: 33/10/1536    most recent 0363546505274716v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Request Reprints Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (3) Citing Articles via Google Scholar Google Scholar Articles by Kilicoglu, O. Articles by Bilgic, B. Search for Related Content PubMed PubMed Citation Articles by Kilicoglu, O. Articles by Bilgic, B. Related Collections Shoulder Rehabilitation/Training Animal studies

Time-Dependent Changes in Failure Loads of 3 Biceps Tenodesis Techniques

In Vivo Study in a Sheep Model

Onder Kilicoglu, MD^*, Ozgur Koyuncu, MD^*, Mehmet Demirhan, MD^*,, Cem Zeki Esenyel, MD, Ata Can Atalar, MD^*, Serhat Ozsoy, MD, Ergun Bozdag, PhD^||, Emin Sunbuloglu, MSc^|| and Bilge Bilgic, MD^*

From the ^* Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey, SSK Vakif Gureba Training Hospital, Istanbul, Turkey, the Faculty of Veterinary Medicine, Istanbul University, Istanbul, Turkey, and the ^|| Faculty of Mechanical Engineering, Department of Strength of Materials, Istanbul Technical University, Istanbul, Turkey

Address correspondence to Mehmet Demirhan, MD, Istanbul University, Istanbul Faculty of Medicine, Department of Orthopedics and Traumatology, Topkapi 34390, Istanbul, Turkey (e-mail: demirhan{at}istanbul.edu.tr).

Background: Failure load of the tendon–fixation material–bone unit has a crucial importance for the rehabilitation protocol after tenodesis procedures.

Purpose: To investigate and compare the time-dependent changes in fixation strengths of 3 proximal biceps tenodesis techniques.

Study Design: Controlled laboratory study.

Methods: Two intraosseous techniques (suture sling and tenodesis screw) and 1 extraosseous technique (2 suture anchors) were investigated. Biceps tenodesis was performed on 45 shoulders of 26 sheep, 15 shoulders for each technique. Twelve similar cadaveric sheep shoulders (4 for each technique) provided the day 0 results. Sheep were sacrificed at 3, 6, and 9 weeks, and specimens were tested for the failure load of the tenodeses.

Results: All 3 tenodesis techniques were found to have similar failure loads at all time intervals tested. All 3 curves remained below the failure load of the intact tendon (862 ± 96 N) and above their day 0 results for the study period; similarly, at each time interval, results tended to be better compared to the previous test. The tenodesis screw group exhibited significantly higher failure loads at week 3 (419 ± 53 N) compared to day 0 values (164 ± 45 N) (P = .009). The same level of significance was observed at week 6 in the remaining 2 groups.

Conclusion: Tenodesis of the biceps tendon on the proximal humerus at an extra-articular site does not weaken after surgery. The tenodesis screw group had a significantly higher increase in the fixation strength within the first 3 weeks.

Clinical Relevance: No significant differences could be found between the failure loads of all 3 investigated tenodeses for the first 9 weeks.

Key Words: biceps tendon • bone • bioabsorbable interference screw (BIS) • anchor • tenodesis

This article has been cited by other articles:

				G. Treme, J. A. Hart, and M. D. Miller What's New in Sports Medicine J. Bone Joint Surg. Am., March 1, 2007; 89(3): 686 - 696. [Full Text] [PDF]