Biomechanical evaluation of acetabular cup implantation in cementless total hip arthroplasty

Kate A. Margalit, Kei Hayashi, Josh Jackson, Sun Young Kim, Tanya C. Garcia, K. Tomo Wiggans, Sean Aiken, Susan M Stover

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Objective: To report biomechanical properties of the Biologic Fixation System (BFX) acetabular cup impacted into a normal canine pelvis and to compare the effect of implant positioned to and beyond the medial acetabular wall. Study Design: In vitro cadaveric study. Animals: Hemipelves of mature, large-breed dogs (n=6). Methods: For each dog, 1 hemipelvis was reamed to the depth of the acetabular wall (group A) and 1 was reamed an additional 6 mm after penetration of the medial cortex of the acetabulum (group B). The hemipelves were implanted with acetabular cups and loaded in compression through a matching femoral prosthetic component until failure. Specimen stiffness, and failure displacement, load, and energy were determined from load and displacement data and results between groups compared with a paired t-test. Results: Mean failure load was greater in group A (3812 ± 391 N) than group B (2924 ± 316 N; P<.014). No other differences (P>.05) were observed between groups. Bone fracture (n=5) and cup displacement (1) occurred in group A whereas in group B there were 3 fractures and 3 cup displacements. Conclusions: Although medial placement of the BFX cup affected compressive failure loads, failure loads for both groups exceeded normal physiologic loads. Clinical Relevance: Medial positioning of the acetabular cup does not appear to compromise acetabular implant-pelvic stability under normal physiologic loads. Because arthroplasty candidates often have abnormal acetabular architecture, mechanical properties of the cup placed in acetabula without a dorsal rim should be investigated.

Original languageEnglish (US)
Pages (from-to)818-823
Number of pages6
JournalVeterinary Surgery
Volume39
Issue number7
DOIs
StatePublished - Oct 2010

Fingerprint

Acetabulum
hips
Arthroplasty
Hip
Dogs
bone fractures
pelvis
dogs
Bone Fractures
thighs
dog breeds
Thigh
Pelvis
in vitro studies
mechanical properties
Canidae
cortex
experimental design
energy
animals

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Biomechanical evaluation of acetabular cup implantation in cementless total hip arthroplasty. / Margalit, Kate A.; Hayashi, Kei; Jackson, Josh; Kim, Sun Young; Garcia, Tanya C.; Wiggans, K. Tomo; Aiken, Sean; Stover, Susan M.

In: Veterinary Surgery, Vol. 39, No. 7, 10.2010, p. 818-823.

Research output: Contribution to journalArticle

Margalit, KA, Hayashi, K, Jackson, J, Kim, SY, Garcia, TC, Wiggans, KT, Aiken, S & Stover, SM 2010, 'Biomechanical evaluation of acetabular cup implantation in cementless total hip arthroplasty', Veterinary Surgery, vol. 39, no. 7, pp. 818-823. https://doi.org/10.1111/j.1532-950X.2010.00726.x
Margalit, Kate A. ; Hayashi, Kei ; Jackson, Josh ; Kim, Sun Young ; Garcia, Tanya C. ; Wiggans, K. Tomo ; Aiken, Sean ; Stover, Susan M. / Biomechanical evaluation of acetabular cup implantation in cementless total hip arthroplasty. In: Veterinary Surgery. 2010 ; Vol. 39, No. 7. pp. 818-823.
@article{22420840910d411e9ad6001f794cc2a5,
title = "Biomechanical evaluation of acetabular cup implantation in cementless total hip arthroplasty",
abstract = "Objective: To report biomechanical properties of the Biologic Fixation System (BFX) acetabular cup impacted into a normal canine pelvis and to compare the effect of implant positioned to and beyond the medial acetabular wall. Study Design: In vitro cadaveric study. Animals: Hemipelves of mature, large-breed dogs (n=6). Methods: For each dog, 1 hemipelvis was reamed to the depth of the acetabular wall (group A) and 1 was reamed an additional 6 mm after penetration of the medial cortex of the acetabulum (group B). The hemipelves were implanted with acetabular cups and loaded in compression through a matching femoral prosthetic component until failure. Specimen stiffness, and failure displacement, load, and energy were determined from load and displacement data and results between groups compared with a paired t-test. Results: Mean failure load was greater in group A (3812 ± 391 N) than group B (2924 ± 316 N; P<.014). No other differences (P>.05) were observed between groups. Bone fracture (n=5) and cup displacement (1) occurred in group A whereas in group B there were 3 fractures and 3 cup displacements. Conclusions: Although medial placement of the BFX cup affected compressive failure loads, failure loads for both groups exceeded normal physiologic loads. Clinical Relevance: Medial positioning of the acetabular cup does not appear to compromise acetabular implant-pelvic stability under normal physiologic loads. Because arthroplasty candidates often have abnormal acetabular architecture, mechanical properties of the cup placed in acetabula without a dorsal rim should be investigated.",
author = "Margalit, {Kate A.} and Kei Hayashi and Josh Jackson and Kim, {Sun Young} and Garcia, {Tanya C.} and Wiggans, {K. Tomo} and Sean Aiken and Stover, {Susan M}",
year = "2010",
month = "10",
doi = "10.1111/j.1532-950X.2010.00726.x",
language = "English (US)",
volume = "39",
pages = "818--823",
journal = "Veterinary Surgery",
issn = "0161-3499",
publisher = "Wiley-Blackwell",
number = "7",

}

TY - JOUR

T1 - Biomechanical evaluation of acetabular cup implantation in cementless total hip arthroplasty

AU - Margalit, Kate A.

AU - Hayashi, Kei

AU - Jackson, Josh

AU - Kim, Sun Young

AU - Garcia, Tanya C.

AU - Wiggans, K. Tomo

AU - Aiken, Sean

AU - Stover, Susan M

PY - 2010/10

Y1 - 2010/10

N2 - Objective: To report biomechanical properties of the Biologic Fixation System (BFX) acetabular cup impacted into a normal canine pelvis and to compare the effect of implant positioned to and beyond the medial acetabular wall. Study Design: In vitro cadaveric study. Animals: Hemipelves of mature, large-breed dogs (n=6). Methods: For each dog, 1 hemipelvis was reamed to the depth of the acetabular wall (group A) and 1 was reamed an additional 6 mm after penetration of the medial cortex of the acetabulum (group B). The hemipelves were implanted with acetabular cups and loaded in compression through a matching femoral prosthetic component until failure. Specimen stiffness, and failure displacement, load, and energy were determined from load and displacement data and results between groups compared with a paired t-test. Results: Mean failure load was greater in group A (3812 ± 391 N) than group B (2924 ± 316 N; P<.014). No other differences (P>.05) were observed between groups. Bone fracture (n=5) and cup displacement (1) occurred in group A whereas in group B there were 3 fractures and 3 cup displacements. Conclusions: Although medial placement of the BFX cup affected compressive failure loads, failure loads for both groups exceeded normal physiologic loads. Clinical Relevance: Medial positioning of the acetabular cup does not appear to compromise acetabular implant-pelvic stability under normal physiologic loads. Because arthroplasty candidates often have abnormal acetabular architecture, mechanical properties of the cup placed in acetabula without a dorsal rim should be investigated.

AB - Objective: To report biomechanical properties of the Biologic Fixation System (BFX) acetabular cup impacted into a normal canine pelvis and to compare the effect of implant positioned to and beyond the medial acetabular wall. Study Design: In vitro cadaveric study. Animals: Hemipelves of mature, large-breed dogs (n=6). Methods: For each dog, 1 hemipelvis was reamed to the depth of the acetabular wall (group A) and 1 was reamed an additional 6 mm after penetration of the medial cortex of the acetabulum (group B). The hemipelves were implanted with acetabular cups and loaded in compression through a matching femoral prosthetic component until failure. Specimen stiffness, and failure displacement, load, and energy were determined from load and displacement data and results between groups compared with a paired t-test. Results: Mean failure load was greater in group A (3812 ± 391 N) than group B (2924 ± 316 N; P<.014). No other differences (P>.05) were observed between groups. Bone fracture (n=5) and cup displacement (1) occurred in group A whereas in group B there were 3 fractures and 3 cup displacements. Conclusions: Although medial placement of the BFX cup affected compressive failure loads, failure loads for both groups exceeded normal physiologic loads. Clinical Relevance: Medial positioning of the acetabular cup does not appear to compromise acetabular implant-pelvic stability under normal physiologic loads. Because arthroplasty candidates often have abnormal acetabular architecture, mechanical properties of the cup placed in acetabula without a dorsal rim should be investigated.

UR - http://www.scopus.com/inward/record.url?scp=77957313612&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957313612&partnerID=8YFLogxK

U2 - 10.1111/j.1532-950X.2010.00726.x

DO - 10.1111/j.1532-950X.2010.00726.x

M3 - Article

C2 - 20723192

AN - SCOPUS:77957313612

VL - 39

SP - 818

EP - 823

JO - Veterinary Surgery

JF - Veterinary Surgery

SN - 0161-3499

IS - 7

ER -