Biomechanical evaluation of the fixation methods for transcondylar fracture of the humerus: ONI plate versus conventional plates and screws

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6 Citations (Scopus)

Abstract

We biomechanically evaluated the bone fixation rigidity of an ONI plate (Group I) during fixation of experimentally created transcondylar humerus fractures in cadaveric elbows, which are the most frequently observed humeral fractures in the elderly, and compared it with the rigidity achieved by 3 conventional fixation methods: an LCP reconstruction plate 3.5 using a locking mechanism (Group II), a conventional reconstruction plate 3.5 (CRP) with a cannulated cancellous screw (Group III), and a CRP with 2 cannulated cancellous screws (CS) in a crisscross orientation (Group IV). In the axial loading test, the mean failure loads were: Group I, 98.9 ± 32.6; Group II, 108.5 ± 27.2; Group III, 50.0 ± 7.5; and Group IV, 34.5 ± 12.2 (N). Group I fixations failed at a significantly higher load than those of Groups III and IV (p <0.05). In the extension loading test, the mean failure loads were: Group I, 34.0 ± 12.4; Group II, 51.0 ± 14.8; Group III, 19.3 ± 6.0; and Group IV, 14.7 ± 3.1 (N). Group IV fixations showed a significantly lower failure load than those of Group I (p <0.05). The fixation rigidities against mechanical loading by the ONI plate and LCP plate were comparable. These results suggested that an ONI system might be superior to the CRP and CS method, and comparable to the LCP method in terms of fixation rigidity for distal humerus fractures.

Original languageEnglish
Pages (from-to)115-120
Number of pages6
JournalActa Medica Okayama
Volume64
Issue number2
Publication statusPublished - Apr 2010

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Humerus
Rigidity
Humeral Fractures
Weight-Bearing
Elbow
Bone and Bones
Bone

Keywords

  • Biomechanics
  • Distal humerus
  • Elderly
  • Fracture
  • Internal fixation

ASJC Scopus subject areas

  • Medicine(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

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title = "Biomechanical evaluation of the fixation methods for transcondylar fracture of the humerus: ONI plate versus conventional plates and screws",
abstract = "We biomechanically evaluated the bone fixation rigidity of an ONI plate (Group I) during fixation of experimentally created transcondylar humerus fractures in cadaveric elbows, which are the most frequently observed humeral fractures in the elderly, and compared it with the rigidity achieved by 3 conventional fixation methods: an LCP reconstruction plate 3.5 using a locking mechanism (Group II), a conventional reconstruction plate 3.5 (CRP) with a cannulated cancellous screw (Group III), and a CRP with 2 cannulated cancellous screws (CS) in a crisscross orientation (Group IV). In the axial loading test, the mean failure loads were: Group I, 98.9 ± 32.6; Group II, 108.5 ± 27.2; Group III, 50.0 ± 7.5; and Group IV, 34.5 ± 12.2 (N). Group I fixations failed at a significantly higher load than those of Groups III and IV (p <0.05). In the extension loading test, the mean failure loads were: Group I, 34.0 ± 12.4; Group II, 51.0 ± 14.8; Group III, 19.3 ± 6.0; and Group IV, 14.7 ± 3.1 (N). Group IV fixations showed a significantly lower failure load than those of Group I (p <0.05). The fixation rigidities against mechanical loading by the ONI plate and LCP plate were comparable. These results suggested that an ONI system might be superior to the CRP and CS method, and comparable to the LCP method in terms of fixation rigidity for distal humerus fractures.",
keywords = "Biomechanics, Distal humerus, Elderly, Fracture, Internal fixation",
author = "Yasunori Shimamura and Keiichiro Nishida and Junya Imatani and Tomoyuki Noda and Hiroyuki Hashizume and Aiji Ohtsuka and Toshihumi Ozaki",
year = "2010",
month = "4",
language = "English",
volume = "64",
pages = "115--120",
journal = "Acta Medica Okayama",
issn = "0386-300X",
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T1 - Biomechanical evaluation of the fixation methods for transcondylar fracture of the humerus

T2 - ONI plate versus conventional plates and screws

AU - Shimamura, Yasunori

AU - Nishida, Keiichiro

AU - Imatani, Junya

AU - Noda, Tomoyuki

AU - Hashizume, Hiroyuki

AU - Ohtsuka, Aiji

AU - Ozaki, Toshihumi

PY - 2010/4

Y1 - 2010/4

N2 - We biomechanically evaluated the bone fixation rigidity of an ONI plate (Group I) during fixation of experimentally created transcondylar humerus fractures in cadaveric elbows, which are the most frequently observed humeral fractures in the elderly, and compared it with the rigidity achieved by 3 conventional fixation methods: an LCP reconstruction plate 3.5 using a locking mechanism (Group II), a conventional reconstruction plate 3.5 (CRP) with a cannulated cancellous screw (Group III), and a CRP with 2 cannulated cancellous screws (CS) in a crisscross orientation (Group IV). In the axial loading test, the mean failure loads were: Group I, 98.9 ± 32.6; Group II, 108.5 ± 27.2; Group III, 50.0 ± 7.5; and Group IV, 34.5 ± 12.2 (N). Group I fixations failed at a significantly higher load than those of Groups III and IV (p <0.05). In the extension loading test, the mean failure loads were: Group I, 34.0 ± 12.4; Group II, 51.0 ± 14.8; Group III, 19.3 ± 6.0; and Group IV, 14.7 ± 3.1 (N). Group IV fixations showed a significantly lower failure load than those of Group I (p <0.05). The fixation rigidities against mechanical loading by the ONI plate and LCP plate were comparable. These results suggested that an ONI system might be superior to the CRP and CS method, and comparable to the LCP method in terms of fixation rigidity for distal humerus fractures.

AB - We biomechanically evaluated the bone fixation rigidity of an ONI plate (Group I) during fixation of experimentally created transcondylar humerus fractures in cadaveric elbows, which are the most frequently observed humeral fractures in the elderly, and compared it with the rigidity achieved by 3 conventional fixation methods: an LCP reconstruction plate 3.5 using a locking mechanism (Group II), a conventional reconstruction plate 3.5 (CRP) with a cannulated cancellous screw (Group III), and a CRP with 2 cannulated cancellous screws (CS) in a crisscross orientation (Group IV). In the axial loading test, the mean failure loads were: Group I, 98.9 ± 32.6; Group II, 108.5 ± 27.2; Group III, 50.0 ± 7.5; and Group IV, 34.5 ± 12.2 (N). Group I fixations failed at a significantly higher load than those of Groups III and IV (p <0.05). In the extension loading test, the mean failure loads were: Group I, 34.0 ± 12.4; Group II, 51.0 ± 14.8; Group III, 19.3 ± 6.0; and Group IV, 14.7 ± 3.1 (N). Group IV fixations showed a significantly lower failure load than those of Group I (p <0.05). The fixation rigidities against mechanical loading by the ONI plate and LCP plate were comparable. These results suggested that an ONI system might be superior to the CRP and CS method, and comparable to the LCP method in terms of fixation rigidity for distal humerus fractures.

KW - Biomechanics

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KW - Fracture

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