Abstract
Objective: To test the hypothesis that longer plates with the minimum number of screws provide equivalent or superior strength of fixation to standard compression plating using the maximum number of screws. Design: Prospective analysis of biomechanical data was performed. Setting: In vitro experimentation. Interventions: A reproducible osteotomy was made in formalin-fixed ulnae. The osteotomies were stabilized employing six-, eight-, or ten-hole plates with two screws in the outermost holes and two screws in the innermost holes, and compared to stabilization with a six-hole plate with six screws. Main Outcome Measure: Four-point mechanical testing to failure was performed in both apex-dorsal (tension-band) or medial-lateral bending modes. Load-displacement curves were obtained. Results: All of the longer plates with the minimum number of screws were stronger than the six-hole plate with six screws when tested in the medial-lateral and the tension-band mode. The eight-hole plate with four screws, however, was statistically inseparable from the fully loaded six-hole plate. There was no statistical difference between any of the configurations in regard to the stiffness of the fixation. Conclusions: In a cadaveric ulnar osteotomy model stripped of soft tissue, the number of screws is less important than the length of the plate in providing bending strength to the construct.
| Original language | English |
|---|---|
| Pages (from-to) | 166-171 |
| Number of pages | 6 |
| Journal | Journal of Orthopaedic Trauma |
| Volume | 16 |
| Issue number | 3 |
| DOIs | |
| State | Published - Apr 9 2002 |
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Keywords
- Fracture
- Plate
- Screws
- Ulna
ASJC Scopus subject areas
- Surgery
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
Cite this
Minimal versus maximal plate fixation techniques of the ulna : The biomechanical effect of number of screws-and plate length. / Sanders, Roy; Haidukewych, George J.; Milne, Ted; Dennis, Jay; Latta, Loren L.
In: Journal of Orthopaedic Trauma, Vol. 16, No. 3, 09.04.2002, p. 166-171.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Minimal versus maximal plate fixation techniques of the ulna
T2 - The biomechanical effect of number of screws-and plate length
AU - Sanders, Roy
AU - Haidukewych, George J.
AU - Milne, Ted
AU - Dennis, Jay
AU - Latta, Loren L.
PY - 2002/4/9
Y1 - 2002/4/9
N2 - Objective: To test the hypothesis that longer plates with the minimum number of screws provide equivalent or superior strength of fixation to standard compression plating using the maximum number of screws. Design: Prospective analysis of biomechanical data was performed. Setting: In vitro experimentation. Interventions: A reproducible osteotomy was made in formalin-fixed ulnae. The osteotomies were stabilized employing six-, eight-, or ten-hole plates with two screws in the outermost holes and two screws in the innermost holes, and compared to stabilization with a six-hole plate with six screws. Main Outcome Measure: Four-point mechanical testing to failure was performed in both apex-dorsal (tension-band) or medial-lateral bending modes. Load-displacement curves were obtained. Results: All of the longer plates with the minimum number of screws were stronger than the six-hole plate with six screws when tested in the medial-lateral and the tension-band mode. The eight-hole plate with four screws, however, was statistically inseparable from the fully loaded six-hole plate. There was no statistical difference between any of the configurations in regard to the stiffness of the fixation. Conclusions: In a cadaveric ulnar osteotomy model stripped of soft tissue, the number of screws is less important than the length of the plate in providing bending strength to the construct.
AB - Objective: To test the hypothesis that longer plates with the minimum number of screws provide equivalent or superior strength of fixation to standard compression plating using the maximum number of screws. Design: Prospective analysis of biomechanical data was performed. Setting: In vitro experimentation. Interventions: A reproducible osteotomy was made in formalin-fixed ulnae. The osteotomies were stabilized employing six-, eight-, or ten-hole plates with two screws in the outermost holes and two screws in the innermost holes, and compared to stabilization with a six-hole plate with six screws. Main Outcome Measure: Four-point mechanical testing to failure was performed in both apex-dorsal (tension-band) or medial-lateral bending modes. Load-displacement curves were obtained. Results: All of the longer plates with the minimum number of screws were stronger than the six-hole plate with six screws when tested in the medial-lateral and the tension-band mode. The eight-hole plate with four screws, however, was statistically inseparable from the fully loaded six-hole plate. There was no statistical difference between any of the configurations in regard to the stiffness of the fixation. Conclusions: In a cadaveric ulnar osteotomy model stripped of soft tissue, the number of screws is less important than the length of the plate in providing bending strength to the construct.
KW - Fracture
KW - Plate
KW - Screws
KW - Ulna
UR - http://www.scopus.com/inward/record.url?scp=0036198119&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036198119&partnerID=8YFLogxK
U2 - 10.1097/00005131-200203000-00005
DO - 10.1097/00005131-200203000-00005
M3 - Article
VL - 16
SP - 166
EP - 171
JO - Journal of Orthopaedic Trauma
JF - Journal of Orthopaedic Trauma
SN - 0890-5339
IS - 3
ER -