Olecranon fracture fixation with a new implant

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Olecranon fracture fixation with a new implant : biomechanical and clinical considerations. / Koslowsky, Thomas C; Mader, Konrad; Dargel, Jens; Schadt, Ruediger; Koebke, Juergen; Pennig, Dietmar.

in: INJURY, Jahrgang 40, Nr. 6, 06.2009, S. 618-24.

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@article{804a8fd7b0614b59bbbb7bdddea1ef02,
title = "Olecranon fracture fixation with a new implant: biomechanical and clinical considerations",
abstract = "UNLABELLED: This study aims to describe the first clinical results in the treatment of dislocated olecranon fractures with 2.2-mm, fine-threaded wires with a washer. Furthermore, in the second part of the article, the stability of these new implants has been compared to standard tension band wiring in a sawbone model.PATIENTS: The radiological and clinical outcomes in 24 patients (mean age: 53.6 years) with 24 isolated Mayo type I and II fractures of the olecranon were evaluated in a prospective study after open reduction and internal fixation (ORIF) with a new fixation device (FFS; Orthofix). The quality of reduction with the implementation of 24 FFS constructions was compared with 24 tension band-wiring procedures performed by six different surgeons in a standard sawbone Mayo type IIa fracture model. Stability was tested in all constructs using a single cycle load to failure protocol (group I), cyclic loading for 300 cycles between 10 and 500 N (group II) and incremental sinusoidal loading from 10 to 200 N with an incremental increase of 10 N per cycle (group III) in a laboratory study.RESULTS: The Morrey elbow score was excellent in 23 patients and good in one patient, with mean DASH score of 1.6. No implant migration, secondary dislocation or nonunion was observed. In the sawbone model, the quality of reduction was the same with the FFS implants compared to the tension band wiring in the sawbone model. Here, bending moments in all three groups showed no significant difference, whereas displacement at failure was significantly greater in the tension band-wiring group at a single cycle load (p=0.017).CONCLUSION: Clinical results were comparable to tension band wiring and stability of the implants in the sawbone model was the same; thus, we conclude that the FFS technique can serve as an alternative treatment option for isolated olecranon fractures.",
keywords = "Biomechanical Phenomena, Bone Wires, Elbow Joint, Female, Fracture Fixation, Internal, Humans, Joint Dislocations, Male, Materials Testing, Middle Aged, Olecranon Process, Prosthesis Failure, Radiography, Range of Motion, Articular, Stress, Mechanical, Tensile Strength, Time Factors, Treatment Outcome, Ulna Fractures, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't",
author = "Koslowsky, {Thomas C} and Konrad Mader and Jens Dargel and Ruediger Schadt and Juergen Koebke and Dietmar Pennig",
year = "2009",
month = jun,
doi = "10.1016/j.injury.2009.01.129",
language = "English",
volume = "40",
pages = "618--24",
journal = "INJURY",
issn = "0020-1383",
publisher = "Elsevier Limited",
number = "6",

}

RIS

TY - JOUR

T1 - Olecranon fracture fixation with a new implant

T2 - biomechanical and clinical considerations

AU - Koslowsky, Thomas C

AU - Mader, Konrad

AU - Dargel, Jens

AU - Schadt, Ruediger

AU - Koebke, Juergen

AU - Pennig, Dietmar

PY - 2009/6

Y1 - 2009/6

N2 - UNLABELLED: This study aims to describe the first clinical results in the treatment of dislocated olecranon fractures with 2.2-mm, fine-threaded wires with a washer. Furthermore, in the second part of the article, the stability of these new implants has been compared to standard tension band wiring in a sawbone model.PATIENTS: The radiological and clinical outcomes in 24 patients (mean age: 53.6 years) with 24 isolated Mayo type I and II fractures of the olecranon were evaluated in a prospective study after open reduction and internal fixation (ORIF) with a new fixation device (FFS; Orthofix). The quality of reduction with the implementation of 24 FFS constructions was compared with 24 tension band-wiring procedures performed by six different surgeons in a standard sawbone Mayo type IIa fracture model. Stability was tested in all constructs using a single cycle load to failure protocol (group I), cyclic loading for 300 cycles between 10 and 500 N (group II) and incremental sinusoidal loading from 10 to 200 N with an incremental increase of 10 N per cycle (group III) in a laboratory study.RESULTS: The Morrey elbow score was excellent in 23 patients and good in one patient, with mean DASH score of 1.6. No implant migration, secondary dislocation or nonunion was observed. In the sawbone model, the quality of reduction was the same with the FFS implants compared to the tension band wiring in the sawbone model. Here, bending moments in all three groups showed no significant difference, whereas displacement at failure was significantly greater in the tension band-wiring group at a single cycle load (p=0.017).CONCLUSION: Clinical results were comparable to tension band wiring and stability of the implants in the sawbone model was the same; thus, we conclude that the FFS technique can serve as an alternative treatment option for isolated olecranon fractures.

AB - UNLABELLED: This study aims to describe the first clinical results in the treatment of dislocated olecranon fractures with 2.2-mm, fine-threaded wires with a washer. Furthermore, in the second part of the article, the stability of these new implants has been compared to standard tension band wiring in a sawbone model.PATIENTS: The radiological and clinical outcomes in 24 patients (mean age: 53.6 years) with 24 isolated Mayo type I and II fractures of the olecranon were evaluated in a prospective study after open reduction and internal fixation (ORIF) with a new fixation device (FFS; Orthofix). The quality of reduction with the implementation of 24 FFS constructions was compared with 24 tension band-wiring procedures performed by six different surgeons in a standard sawbone Mayo type IIa fracture model. Stability was tested in all constructs using a single cycle load to failure protocol (group I), cyclic loading for 300 cycles between 10 and 500 N (group II) and incremental sinusoidal loading from 10 to 200 N with an incremental increase of 10 N per cycle (group III) in a laboratory study.RESULTS: The Morrey elbow score was excellent in 23 patients and good in one patient, with mean DASH score of 1.6. No implant migration, secondary dislocation or nonunion was observed. In the sawbone model, the quality of reduction was the same with the FFS implants compared to the tension band wiring in the sawbone model. Here, bending moments in all three groups showed no significant difference, whereas displacement at failure was significantly greater in the tension band-wiring group at a single cycle load (p=0.017).CONCLUSION: Clinical results were comparable to tension band wiring and stability of the implants in the sawbone model was the same; thus, we conclude that the FFS technique can serve as an alternative treatment option for isolated olecranon fractures.

KW - Biomechanical Phenomena

KW - Bone Wires

KW - Elbow Joint

KW - Female

KW - Fracture Fixation, Internal

KW - Humans

KW - Joint Dislocations

KW - Male

KW - Materials Testing

KW - Middle Aged

KW - Olecranon Process

KW - Prosthesis Failure

KW - Radiography

KW - Range of Motion, Articular

KW - Stress, Mechanical

KW - Tensile Strength

KW - Time Factors

KW - Treatment Outcome

KW - Ulna Fractures

KW - Journal Article

KW - Randomized Controlled Trial

KW - Research Support, Non-U.S. Gov't

U2 - 10.1016/j.injury.2009.01.129

DO - 10.1016/j.injury.2009.01.129

M3 - SCORING: Journal article

C2 - 19394014

VL - 40

SP - 618

EP - 624

JO - INJURY

JF - INJURY

SN - 0020-1383

IS - 6

ER -