The resistance of a four- and eight-strand suture technique to gap formation during tensile testing: An experimental study of repaired canine flexor tendons after 10 days of in vivo healing

Citation
Ht. Dinopoulos et al., The resistance of a four- and eight-strand suture technique to gap formation during tensile testing: An experimental study of repaired canine flexor tendons after 10 days of in vivo healing, J HAND S-AM, 25A(3), 2000, pp. 489-498
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Ortopedics, Rehabilitation & Sport Medicine
Journal title
JOURNAL OF HAND SURGERY-AMERICAN VOLUME
ISSN journal
0363-5023 → ACNP
Volume
25A
Issue
3
Year of publication
2000
Pages
489 - 498
Database
ISI
SICI code
0363-5023(200005)25A:3<489:TROAFA>2.0.ZU;2-#
Abstract
There is a high incidence of gap formation at the repair site following ten don repair. Our goal was to determine the resistance of a 4- and an 8-stran d suture technique to gap formation during tensile testing. We hypothesized that the 8-strand repair would sustain higher force levels at the onset of 1- and 3-mm gaps than the 4-strand repair. Twenty-two canine flexor tendon s were transected, repaired, and tested to failure after 10 days of in vivo healing. Tests were recorded using a 60-Hz video system that allowed frame -by-frame playback for assessment of gap formation. The 8-strand repairs su stained 80% higher force at a gap of 1 mm than the 4-strand repairs (averag e force, 70 vs 39 N), but the force sustained at a gap of 3 mm did not diff er between groups (35 N for both groups). For both repair types, a 1-mm gap typically occurred near the point of ultimate (maximum) force while a 3-mm gap occurred after the ultimate force. We conclude that the 8-strand repai r is significantly more resistant to initial gapping during ex vivo tensile testing than the 4-strand repair but that the two repairs are equally susc eptible to rupture if a gap of 3 mm or greater forms. (1 Hand Surg 2000;25A :489-498. Copyright (C) 2000 by the American Society for Surgery of the Han d.).