The Effect of Insertion Technique on Temperatures for Standard and Self-Drilling External Fixation Pins.

Abstract:

OBJECTIVES:No studies have assessed the effects of parameters associated with insertion temperature in modern self-drilling external fixation pins. The current study assessed how varying the presence of irrigation, insertion speed, and force impacted the insertion temperatures of 2 types of standard and self-drilling external fixation half pins. METHODS:Seventy tests were conducted with 10 trials for 4 conditions on self-drilling pins, and 3 conditions for standard pins. Each test used a thermocouple inside the pin to measure temperature rise during insertion. RESULTS:Adding irrigation to the standard pin insertion significantly lowered the maximum temperature (P <0.001). Lowering the applied force for the standard pin did not have a significant change in temperature rise. Applying irrigation during the self-drilling pin tests dropped average rise in temperature from 151.3 ± 21.6°C to 124.1 ± 15.3°C (P = 0.005). When the self-drilling pin insertion was decreased considerably from 360 to 60 rpm, the temperature decreased significantly from 151.3 ± 21.6°C to 109.6 ± 14.0°C (P <0.001). When the force applied increased significantly, the corresponding self-drilling pin temperature increase was not significant. CONCLUSIONS:The standard pin had lower peak temperatures than the self-drilling pin for all conditions. Moreover, slowing down the insertion speed and adding irrigation helped mitigate the temperature increase of both pin types during insertion.

journal_name

J Orthop Trauma

authors

Manoogian S,Lee AK,Widmaier JC

doi

10.1097/BOT.0000000000000859

subject

Has Abstract

pub_date

2017-08-01 00:00:00

pages

e247-e251

issue

8

eissn

0890-5339

issn

1531-2291

journal_volume

31

pub_type

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