Introduction of a new repair technique in bony avulsion of the FDP tendon: A biomechanical study

Gabriel Halát, Lukas L Negrin, Ewald Unger, Thomas Koch, Johannes Streicher, Jochen Erhart, Patrick Platzer, Stefan Hajdu

Research output: Journal article (peer-reviewed)Journal article

Abstract

The purpose of this study was to determine the biomechanical characteristics of an innovative surgical technique based on a tension banding principle using a suture anchor in the repair of bony avulsions of the flexor digitorum profundus tendon. After injury simulation in 45 fresh frozen distal phalanges from human cadavers, repair was performed with minifragment screws, interosseous sutures and the innovative technique (15 per group). All repairs were loaded for a total of 500 cycles. Subsequently the specimens were loaded to failure. Load at failure, load at first noteworthy displacement (>2 mm), elongation of the system, gap formation at the avulsion site, and the mechanism of failure were assessed. The new techniques' superior performance in load at failure (mean: 100.5 N), load at first noteworthy displacement (mean 77.4 N), and gap formation (median 0 mm) was statistically significant, which implies a preferable rigidity of the repair. No implant extrusion or suture rupture during cyclic loading were recorded when the new technique was applied. This innovative repair technique is superior biomechanically to other commonly used surgical tendon reattachment methods, particularly with respect to an early passive mobilisation protocol. Further, due to its subcutaneous position, reduction of complications may be achieved.

Original languageEnglish
Article number9906
Pages (from-to)9906
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - 1 Dec 2018

Keywords

  • Aged
  • Aged, 80 and over
  • Biomechanical Phenomena
  • Bone Screws
  • Cadaver
  • Equipment Design
  • Female
  • Finger Injuries/surgery
  • Humans
  • Male
  • Orthopedic Procedures/methods
  • Suture Techniques
  • Sutures
  • Tendon Injuries/surgery

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