Format

Send to

Choose Destination
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi. 2018 Feb 15;32(2):192-194. doi: 10.7507/1002-1892.201709121.

[Biomechanical comparison of three kinds of fixation instruments for calcaneal osteotomy].

[Article in Chinese; Abstract available in Chinese from the publisher]

Author information

1
Graduate Management Brigade, Army Medical University, Chongqing, 400038, P.R.China.
2
Department of Orthopedics, Kunming General Hospital, Chengdu Military Region of Chinese PLA, Kunming Yunnan, 650032, P.R.China.xuyongqingkm@163.net.
3
Department of Orthopedics, Kunming General Hospital, Chengdu Military Region of Chinese PLA, Kunming Yunnan, 650032, P.R.China.
4
Graduate Department of Kunming Medical University, Kunming Yunnan, 650032, P.R.China.

Abstract

in English, Chinese

Objective:

To compare the biomechanical characteristics of self-made nickel-titanium shape memory alloy stepped plate with calcaneal plate and cannulated compression screws in fixing calcaneal osteotomy.

Methods:

Calcaneal osteotomy was operated on 6 fresh-frozen lower limbs collected from donors. Then three kinds of fixation materials were applied in random, including the self-made nickel-titanium shape memory alloy stepped plate (group A), calcaneal plate (group B), and cannulated compression screws (group C). Immediately after fixation, axial loading of 20-600 N and 20 N/s in speed was introduced to record the biomechanical data including maximum displacement, elastic displacement, and maximum load. Then fatigue test was performed (5 Hz in frequency and repeat 3 000 times) and the same axial loading was introduced to collect the biomechanical data. Finally, the axial compression stiffness before and after fatigue test were calculated.

Results:

There was no significant difference in the axial compression stiffness between pre- and post-fatigue test in each group ( P>0.05). However, the axial compression stiffness was significant higher in group A than that in groups B and C both before and after fatigue test ( P<0.05). No significant difference was found between group B and group C ( P>0.05).

Conclusion:

Self-made nickel-titanium shape memory alloy stepped plate is better than calcaneal plate and cannulated compression screws in axial load stiffness after being used to fix calcaneal osteotomy.

KEYWORDS:

Calcaneal osteotomy; biomechanics; compression stiffness; nickel-titanium shape memory alloy; stepped plate

PMID:
29806411
DOI:
10.7507/1002-1892.201709121
[Indexed for MEDLINE]

Supplemental Content

Loading ...
Support Center