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Periprosthetic bone mineral density changes after unicondylar knee arthroplasty

Abstract Background Unicompartmental knee arthroplasty (UKA) has received renewed interest in the last decade. UKA involves minor injury to soft tissues, limited removal of bone and delicate preservation of knee anatomy and geometry. In theory, UKA provides an opportunity to restore post-surgical kn... Full description

Journal Title: The knee 2012, Vol.20 (2), p.120-127
Main Author: Soininvaara, Tarja A
Other Authors: Harju, Kristiina A.L , Miettinen, Hannu J.A , Kröger, Heikki P.J
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: Netherlands: Elsevier B.V
ID: ISSN: 0968-0160
Link: https://www.ncbi.nlm.nih.gov/pubmed/23154036
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title: Periprosthetic bone mineral density changes after unicondylar knee arthroplasty
format: Article
creator:
  • Soininvaara, Tarja A
  • Harju, Kristiina A.L
  • Miettinen, Hannu J.A
  • Kröger, Heikki P.J
subjects:
  • Absorptiometry, Photon
  • Aged
  • Aged, 80 and over
  • Arthroplasty, Replacement, Knee
  • Bone Density
  • Bone loss
  • Bone mineral density
  • Bone Resorption - diagnostic imaging
  • Bones
  • Density
  • Dual-energy X-ray absorptiometry
  • Female
  • Femur - diagnostic imaging
  • Follow-Up Studies
  • Humans
  • Knee Prosthesis
  • Male
  • Middle Aged
  • Orthopedics
  • Osteoarthritis, Knee - surgery
  • Patella - diagnostic imaging
  • Prospective follow-up
  • Prospective Studies
  • Tibia - diagnostic imaging
  • Time Factors
  • Unicondylar knee arthroplasty
ispartof: The knee, 2012, Vol.20 (2), p.120-127
description: Abstract Background Unicompartmental knee arthroplasty (UKA) has received renewed interest in the last decade. UKA involves minor injury to soft tissues, limited removal of bone and delicate preservation of knee anatomy and geometry. In theory, UKA provides an opportunity to restore post-surgical knee kinematics to near normal. Hypothesis UKA leaves patellofemoral joint free to meet high mechanical forces with no stress-shielding and therefore might preserve bone mineral density (BMD). Patients and methods We studied 21 patients with osteoarthritis(OA), who had received medial compartment UKA at Kuopio University Hospital between October 1997 and September 2000. BMD was measured by dual-energy X-ray absorptiometry (DEXA), at baseline (within a week after surgery) and at intervals until 7 years. Results DEXA results were reproducible. The highest rate of periprosthetic bone loss occurred during the first 3 months after UKA. The average loss in BMD was 4.4% (p = 0.039) in the femoral diaphysis and it ranged from 11.2% (p < 0.001) to 11.9% (p = 0.002) in the distal femoral metaphysis; however, BMD changes in these regions, from 2 years to 7 years, were nonsignificant. At the 1-year follow-up, the BMD of the medial tibial metaphysis had increased by 8.9% (p = 0.02), whereas those in the lateral tibial metaphysial (–2.4%) and diaphysial regions (–2.0%) did not change significantly. Interpretations UKA did not preserve periprosthetic BMD in the distal femoral metaphysis, whereas BMD changes in the tibial metaphysis were minor, consistent with a mechanical balance between the medial and lateral tibial compartments. Level of Evidence 2b Prospective case control study.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0968-0160
fulltext: fulltext
issn:
  • 0968-0160
  • 1873-5800
url: Link


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titlePeriprosthetic bone mineral density changes after unicondylar knee arthroplasty
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creatorSoininvaara, Tarja A ; Harju, Kristiina A.L ; Miettinen, Hannu J.A ; Kröger, Heikki P.J
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descriptionAbstract Background Unicompartmental knee arthroplasty (UKA) has received renewed interest in the last decade. UKA involves minor injury to soft tissues, limited removal of bone and delicate preservation of knee anatomy and geometry. In theory, UKA provides an opportunity to restore post-surgical knee kinematics to near normal. Hypothesis UKA leaves patellofemoral joint free to meet high mechanical forces with no stress-shielding and therefore might preserve bone mineral density (BMD). Patients and methods We studied 21 patients with osteoarthritis(OA), who had received medial compartment UKA at Kuopio University Hospital between October 1997 and September 2000. BMD was measured by dual-energy X-ray absorptiometry (DEXA), at baseline (within a week after surgery) and at intervals until 7 years. Results DEXA results were reproducible. The highest rate of periprosthetic bone loss occurred during the first 3 months after UKA. The average loss in BMD was 4.4% (p = 0.039) in the femoral diaphysis and it ranged from 11.2% (p < 0.001) to 11.9% (p = 0.002) in the distal femoral metaphysis; however, BMD changes in these regions, from 2 years to 7 years, were nonsignificant. At the 1-year follow-up, the BMD of the medial tibial metaphysis had increased by 8.9% (p = 0.02), whereas those in the lateral tibial metaphysial (–2.4%) and diaphysial regions (–2.0%) did not change significantly. Interpretations UKA did not preserve periprosthetic BMD in the distal femoral metaphysis, whereas BMD changes in the tibial metaphysis were minor, consistent with a mechanical balance between the medial and lateral tibial compartments. Level of Evidence 2b Prospective case control study.
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subjectAbsorptiometry, Photon ; Aged ; Aged, 80 and over ; Arthroplasty, Replacement, Knee ; Bone Density ; Bone loss ; Bone mineral density ; Bone Resorption - diagnostic imaging ; Bones ; Density ; Dual-energy X-ray absorptiometry ; Female ; Femur - diagnostic imaging ; Follow-Up Studies ; Humans ; Knee Prosthesis ; Male ; Middle Aged ; Orthopedics ; Osteoarthritis, Knee - surgery ; Patella - diagnostic imaging ; Prospective follow-up ; Prospective Studies ; Tibia - diagnostic imaging ; Time Factors ; Unicondylar knee arthroplasty
ispartofThe knee, 2012, Vol.20 (2), p.120-127
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descriptionAbstract Background Unicompartmental knee arthroplasty (UKA) has received renewed interest in the last decade. UKA involves minor injury to soft tissues, limited removal of bone and delicate preservation of knee anatomy and geometry. In theory, UKA provides an opportunity to restore post-surgical knee kinematics to near normal. Hypothesis UKA leaves patellofemoral joint free to meet high mechanical forces with no stress-shielding and therefore might preserve bone mineral density (BMD). Patients and methods We studied 21 patients with osteoarthritis(OA), who had received medial compartment UKA at Kuopio University Hospital between October 1997 and September 2000. BMD was measured by dual-energy X-ray absorptiometry (DEXA), at baseline (within a week after surgery) and at intervals until 7 years. Results DEXA results were reproducible. The highest rate of periprosthetic bone loss occurred during the first 3 months after UKA. The average loss in BMD was 4.4% (p = 0.039) in the femoral diaphysis and it ranged from 11.2% (p < 0.001) to 11.9% (p = 0.002) in the distal femoral metaphysis; however, BMD changes in these regions, from 2 years to 7 years, were nonsignificant. At the 1-year follow-up, the BMD of the medial tibial metaphysis had increased by 8.9% (p = 0.02), whereas those in the lateral tibial metaphysial (–2.4%) and diaphysial regions (–2.0%) did not change significantly. Interpretations UKA did not preserve periprosthetic BMD in the distal femoral metaphysis, whereas BMD changes in the tibial metaphysis were minor, consistent with a mechanical balance between the medial and lateral tibial compartments. Level of Evidence 2b Prospective case control study.
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1Aged
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24Time Factors
25Unicondylar knee arthroplasty
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abstractAbstract Background Unicompartmental knee arthroplasty (UKA) has received renewed interest in the last decade. UKA involves minor injury to soft tissues, limited removal of bone and delicate preservation of knee anatomy and geometry. In theory, UKA provides an opportunity to restore post-surgical knee kinematics to near normal. Hypothesis UKA leaves patellofemoral joint free to meet high mechanical forces with no stress-shielding and therefore might preserve bone mineral density (BMD). Patients and methods We studied 21 patients with osteoarthritis(OA), who had received medial compartment UKA at Kuopio University Hospital between October 1997 and September 2000. BMD was measured by dual-energy X-ray absorptiometry (DEXA), at baseline (within a week after surgery) and at intervals until 7 years. Results DEXA results were reproducible. The highest rate of periprosthetic bone loss occurred during the first 3 months after UKA. The average loss in BMD was 4.4% (p = 0.039) in the femoral diaphysis and it ranged from 11.2% (p < 0.001) to 11.9% (p = 0.002) in the distal femoral metaphysis; however, BMD changes in these regions, from 2 years to 7 years, were nonsignificant. At the 1-year follow-up, the BMD of the medial tibial metaphysis had increased by 8.9% (p = 0.02), whereas those in the lateral tibial metaphysial (–2.4%) and diaphysial regions (–2.0%) did not change significantly. Interpretations UKA did not preserve periprosthetic BMD in the distal femoral metaphysis, whereas BMD changes in the tibial metaphysis were minor, consistent with a mechanical balance between the medial and lateral tibial compartments. Level of Evidence 2b Prospective case control study.
copNetherlands
pubElsevier B.V
pmid23154036
doi10.1016/j.knee.2012.10.004