Increased pin diameter improves torsional stability in supracondylar humerus fractures: an experimental study

Anupam Pradhan, William Hennrikus, Gregory Pace, April Armstrong, Gregory Lewis

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Background: Pediatric supracondylar humerus fractures are the most common elbow fractures seen in children, and account for 16 % of all pediatric fractures. Closed reduction and percutaneous pin fixation is the current treatment technique of choice for displaced supracondylar fractures of the distal humerus in children. The purpose of this study was to determine whether pin diameter affects the torsional strength of supracondylar humerus fractures treated by closed reduction and pin fixation. Methods: Pediatric sawbone humeri simulating a Gartland type III fracture were utilized. Four different pin configurations were compared. Specimens were subjected to a torsional load producing internal rotation of the distal fragment. The stability provided by 1.25- and 1.6-mm pins was compared. Results: The amount of torque required to produce 15° and 25° of rotation was greater using larger diameter pins in all models tested. The two lateral and one medial large pin (1.6 mm) configuration required the highest amount of torque to produce both 15° and 25° of rotation. Conclusions: In a synthetic pediatric humerus model of supracondylar humerus fractures, larger diameter pins (1.6 mm) provided increased stability compared with small diameter pins (1.25 mm). Fixation using larger diameter pins created a stronger construct and improved the strength of fixation.

Original languageEnglish (US)
Pages (from-to)163-167
Number of pages5
JournalJournal of Children's Orthopaedics
Volume10
Issue number2
DOIs
StatePublished - Apr 1 2016

Fingerprint

Humerus
Pediatrics
Torque
Elbow

All Science Journal Classification (ASJC) codes

  • Pediatrics, Perinatology, and Child Health
  • Orthopedics and Sports Medicine

Cite this

@article{ef2b0cbba4e04c969597330ae5461584,
title = "Increased pin diameter improves torsional stability in supracondylar humerus fractures: an experimental study",
abstract = "Background: Pediatric supracondylar humerus fractures are the most common elbow fractures seen in children, and account for 16 {\%} of all pediatric fractures. Closed reduction and percutaneous pin fixation is the current treatment technique of choice for displaced supracondylar fractures of the distal humerus in children. The purpose of this study was to determine whether pin diameter affects the torsional strength of supracondylar humerus fractures treated by closed reduction and pin fixation. Methods: Pediatric sawbone humeri simulating a Gartland type III fracture were utilized. Four different pin configurations were compared. Specimens were subjected to a torsional load producing internal rotation of the distal fragment. The stability provided by 1.25- and 1.6-mm pins was compared. Results: The amount of torque required to produce 15° and 25° of rotation was greater using larger diameter pins in all models tested. The two lateral and one medial large pin (1.6 mm) configuration required the highest amount of torque to produce both 15° and 25° of rotation. Conclusions: In a synthetic pediatric humerus model of supracondylar humerus fractures, larger diameter pins (1.6 mm) provided increased stability compared with small diameter pins (1.25 mm). Fixation using larger diameter pins created a stronger construct and improved the strength of fixation.",
author = "Anupam Pradhan and William Hennrikus and Gregory Pace and April Armstrong and Gregory Lewis",
year = "2016",
month = "4",
day = "1",
doi = "10.1007/s11832-016-0722-z",
language = "English (US)",
volume = "10",
pages = "163--167",
journal = "Journal of Children's Orthopaedics",
issn = "1863-2521",
publisher = "Springer Verlag",
number = "2",

}

TY - JOUR

T1 - Increased pin diameter improves torsional stability in supracondylar humerus fractures

T2 - an experimental study

AU - Pradhan, Anupam

AU - Hennrikus, William

AU - Pace, Gregory

AU - Armstrong, April

AU - Lewis, Gregory

PY - 2016/4/1

Y1 - 2016/4/1

N2 - Background: Pediatric supracondylar humerus fractures are the most common elbow fractures seen in children, and account for 16 % of all pediatric fractures. Closed reduction and percutaneous pin fixation is the current treatment technique of choice for displaced supracondylar fractures of the distal humerus in children. The purpose of this study was to determine whether pin diameter affects the torsional strength of supracondylar humerus fractures treated by closed reduction and pin fixation. Methods: Pediatric sawbone humeri simulating a Gartland type III fracture were utilized. Four different pin configurations were compared. Specimens were subjected to a torsional load producing internal rotation of the distal fragment. The stability provided by 1.25- and 1.6-mm pins was compared. Results: The amount of torque required to produce 15° and 25° of rotation was greater using larger diameter pins in all models tested. The two lateral and one medial large pin (1.6 mm) configuration required the highest amount of torque to produce both 15° and 25° of rotation. Conclusions: In a synthetic pediatric humerus model of supracondylar humerus fractures, larger diameter pins (1.6 mm) provided increased stability compared with small diameter pins (1.25 mm). Fixation using larger diameter pins created a stronger construct and improved the strength of fixation.

AB - Background: Pediatric supracondylar humerus fractures are the most common elbow fractures seen in children, and account for 16 % of all pediatric fractures. Closed reduction and percutaneous pin fixation is the current treatment technique of choice for displaced supracondylar fractures of the distal humerus in children. The purpose of this study was to determine whether pin diameter affects the torsional strength of supracondylar humerus fractures treated by closed reduction and pin fixation. Methods: Pediatric sawbone humeri simulating a Gartland type III fracture were utilized. Four different pin configurations were compared. Specimens were subjected to a torsional load producing internal rotation of the distal fragment. The stability provided by 1.25- and 1.6-mm pins was compared. Results: The amount of torque required to produce 15° and 25° of rotation was greater using larger diameter pins in all models tested. The two lateral and one medial large pin (1.6 mm) configuration required the highest amount of torque to produce both 15° and 25° of rotation. Conclusions: In a synthetic pediatric humerus model of supracondylar humerus fractures, larger diameter pins (1.6 mm) provided increased stability compared with small diameter pins (1.25 mm). Fixation using larger diameter pins created a stronger construct and improved the strength of fixation.

UR - http://www.scopus.com/inward/record.url?scp=84961176322&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84961176322&partnerID=8YFLogxK

U2 - 10.1007/s11832-016-0722-z

DO - 10.1007/s11832-016-0722-z

M3 - Article

AN - SCOPUS:84961176322

VL - 10

SP - 163

EP - 167

JO - Journal of Children's Orthopaedics

JF - Journal of Children's Orthopaedics

SN - 1863-2521

IS - 2

ER -