Changes in bone mineral density of the distal femur following uncemented total knee arthroplasty

M M Petersen; C Olsen; J B Lauritzen; B Lund

doi:10.1016/s0883-5403(05)80094-4

Changes in bone mineral density of the distal femur following uncemented total knee arthroplasty

M M Petersen, C Olsen, J B Lauritzen, B Lund

Abstract

The aim of the study was to quantitate changes in bone mineral density (BMD) in the distal femur following uncemented porous-coated total knee arthroplasty. Eight patients with total knee arthroplasties (PCA Primary, Howmedica, Rutherford, NJ) (female:male ratio, 6:2; mean age, 70 years; range, 51-77 years) were scanned by dual-photon absorptiometry within 3 months after surgery and at 2 years. An average decrease of 36% (P = .01) was found in BMD behind the anterior flange of the femoral prosthesis. Proximal to the fixation pegs, BMD increased by 22% (P = .12), but behind the posterior flange of the femoral component, BMD remained unchanged (P = .53). Stress shielding anteriorly in the distal femur occurred in all patients examined 2 years after surgery, and the increase in BMD proximal to the fixation pegs was probably a result of increased and altered mechanical loading.

Original language	English
Journal	The Journal of arthroplasty
Volume	10
Issue number	1
Pages (from-to)	7-11
Number of pages	5
ISSN	0883-5403
DOIs	https://doi.org/10.1016/s0883-5403(05)80094-4
Publication status	Published - Feb 1995
Externally published	Yes

Keywords

Absorptiometry, Photon
Aged
Bone Cements
Bone Density/physiology
Female
Femur/diagnostic imaging
Follow-Up Studies
Humans
Knee Prosthesis
Male
Middle Aged
Prosthesis Design
Radionuclide Imaging
Time Factors
Weight-Bearing/physiology

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10.1016/s0883-5403(05)80094-4

Cite this

@article{f5cb3326de01491a8f304bfdb4fc9eba,

title = "Changes in bone mineral density of the distal femur following uncemented total knee arthroplasty",

abstract = "The aim of the study was to quantitate changes in bone mineral density (BMD) in the distal femur following uncemented porous-coated total knee arthroplasty. Eight patients with total knee arthroplasties (PCA Primary, Howmedica, Rutherford, NJ) (female:male ratio, 6:2; mean age, 70 years; range, 51-77 years) were scanned by dual-photon absorptiometry within 3 months after surgery and at 2 years. An average decrease of 36% (P = .01) was found in BMD behind the anterior flange of the femoral prosthesis. Proximal to the fixation pegs, BMD increased by 22% (P = .12), but behind the posterior flange of the femoral component, BMD remained unchanged (P = .53). Stress shielding anteriorly in the distal femur occurred in all patients examined 2 years after surgery, and the increase in BMD proximal to the fixation pegs was probably a result of increased and altered mechanical loading.",

keywords = "Absorptiometry, Photon, Aged, Bone Cements, Bone Density/physiology, Female, Femur/diagnostic imaging, Follow-Up Studies, Humans, Knee Prosthesis, Male, Middle Aged, Prosthesis Design, Radionuclide Imaging, Time Factors, Weight-Bearing/physiology",

author = "Petersen, {M M} and C Olsen and Lauritzen, {J B} and B Lund",

year = "1995",

month = feb,

doi = "10.1016/s0883-5403(05)80094-4",

language = "English",

volume = "10",

pages = "7--11",

journal = "The Journal of arthroplasty",

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publisher = "Churchill Livingstone",

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TY - JOUR

T1 - Changes in bone mineral density of the distal femur following uncemented total knee arthroplasty

AU - Petersen, M M

AU - Olsen, C

AU - Lauritzen, J B

AU - Lund, B

PY - 1995/2

Y1 - 1995/2

N2 - The aim of the study was to quantitate changes in bone mineral density (BMD) in the distal femur following uncemented porous-coated total knee arthroplasty. Eight patients with total knee arthroplasties (PCA Primary, Howmedica, Rutherford, NJ) (female:male ratio, 6:2; mean age, 70 years; range, 51-77 years) were scanned by dual-photon absorptiometry within 3 months after surgery and at 2 years. An average decrease of 36% (P = .01) was found in BMD behind the anterior flange of the femoral prosthesis. Proximal to the fixation pegs, BMD increased by 22% (P = .12), but behind the posterior flange of the femoral component, BMD remained unchanged (P = .53). Stress shielding anteriorly in the distal femur occurred in all patients examined 2 years after surgery, and the increase in BMD proximal to the fixation pegs was probably a result of increased and altered mechanical loading.

AB - The aim of the study was to quantitate changes in bone mineral density (BMD) in the distal femur following uncemented porous-coated total knee arthroplasty. Eight patients with total knee arthroplasties (PCA Primary, Howmedica, Rutherford, NJ) (female:male ratio, 6:2; mean age, 70 years; range, 51-77 years) were scanned by dual-photon absorptiometry within 3 months after surgery and at 2 years. An average decrease of 36% (P = .01) was found in BMD behind the anterior flange of the femoral prosthesis. Proximal to the fixation pegs, BMD increased by 22% (P = .12), but behind the posterior flange of the femoral component, BMD remained unchanged (P = .53). Stress shielding anteriorly in the distal femur occurred in all patients examined 2 years after surgery, and the increase in BMD proximal to the fixation pegs was probably a result of increased and altered mechanical loading.

KW - Absorptiometry, Photon

KW - Aged

KW - Bone Cements

KW - Bone Density/physiology

KW - Female

KW - Femur/diagnostic imaging

KW - Follow-Up Studies

KW - Humans

KW - Knee Prosthesis

KW - Male

KW - Middle Aged

KW - Prosthesis Design

KW - Radionuclide Imaging

KW - Time Factors

KW - Weight-Bearing/physiology

U2 - 10.1016/s0883-5403(05)80094-4

DO - 10.1016/s0883-5403(05)80094-4

M3 - Journal article

C2 - 7730833

SN - 0883-5403

VL - 10

SP - 7

EP - 11

JO - The Journal of arthroplasty

JF - The Journal of arthroplasty

IS - 1

ER -

Changes in bone mineral density of the distal femur following uncemented total knee arthroplasty

Abstract

Keywords

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