Bone mineral density of the proximal femur recovers after metal-on-metal hip resurfacing

Matteo Cadossi, Antonio Moroni, Matteo Romagnoli, Eugenio Chiarello, Cesare Faldini, Sandro Giannini

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Bone resorption of the proximal femur is a frequent complication of total hip replacement. As hip resurfacing (HR) may load the bone more physiologically, we measured proximal femur bone mineral density (BMD) in 21 patients with HR. DEXA analysis was performed in the 7 Gruen zones and in the femoral neck pre-operatively and at 3, 9, and 24-months post-operatively. In Gruen zone-2 the BMD ratio decreased to 90±18.8% (p=0.0009) at 3-months and completely restored at 24-months to 100±17.7% (p=0.01). In Gruen zone-7 the BMD ratio decreased to 93±15.3% (p=0.05) by 3 months and surpassed the baseline to 105±14.8% (p=0.01) at 24-months. A positive correlation was observed between valgus positioning of the femoral component and BMD in Gruen zone-2 and 7 respectively. HR preserves the bone-stock of the proximal femur. When the femoral component is implanted in a valgus position BMD is further enhanced, thus potentially reducing the risk of femoral neck fractures.

Original languageEnglish
Pages (from-to)135-139
Number of pages5
JournalClinical Cases in Mineral and Bone Metabolism
Volume7
Issue number2
Publication statusPublished - May 2010

Fingerprint

Bone Density
Femur
Hip
Metals
Thigh
Bone and Bones
Femoral Neck Fractures
Hip Replacement Arthroplasties
Femur Neck
Bone Resorption

Keywords

  • Bone mineral density
  • Dual-energy x-ray absorptiometry
  • Hip resurfacing
  • Metal-on-metal
  • Valgus

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Internal Medicine

Cite this

Bone mineral density of the proximal femur recovers after metal-on-metal hip resurfacing. / Cadossi, Matteo; Moroni, Antonio; Romagnoli, Matteo; Chiarello, Eugenio; Faldini, Cesare; Giannini, Sandro.

In: Clinical Cases in Mineral and Bone Metabolism, Vol. 7, No. 2, 05.2010, p. 135-139.

Research output: Contribution to journalArticle

Cadossi, Matteo ; Moroni, Antonio ; Romagnoli, Matteo ; Chiarello, Eugenio ; Faldini, Cesare ; Giannini, Sandro. / Bone mineral density of the proximal femur recovers after metal-on-metal hip resurfacing. In: Clinical Cases in Mineral and Bone Metabolism. 2010 ; Vol. 7, No. 2. pp. 135-139.
@article{2a5fee8aefa24b02aba366eaf665380e,
title = "Bone mineral density of the proximal femur recovers after metal-on-metal hip resurfacing",
abstract = "Bone resorption of the proximal femur is a frequent complication of total hip replacement. As hip resurfacing (HR) may load the bone more physiologically, we measured proximal femur bone mineral density (BMD) in 21 patients with HR. DEXA analysis was performed in the 7 Gruen zones and in the femoral neck pre-operatively and at 3, 9, and 24-months post-operatively. In Gruen zone-2 the BMD ratio decreased to 90±18.8{\%} (p=0.0009) at 3-months and completely restored at 24-months to 100±17.7{\%} (p=0.01). In Gruen zone-7 the BMD ratio decreased to 93±15.3{\%} (p=0.05) by 3 months and surpassed the baseline to 105±14.8{\%} (p=0.01) at 24-months. A positive correlation was observed between valgus positioning of the femoral component and BMD in Gruen zone-2 and 7 respectively. HR preserves the bone-stock of the proximal femur. When the femoral component is implanted in a valgus position BMD is further enhanced, thus potentially reducing the risk of femoral neck fractures.",
keywords = "Bone mineral density, Dual-energy x-ray absorptiometry, Hip resurfacing, Metal-on-metal, Valgus",
author = "Matteo Cadossi and Antonio Moroni and Matteo Romagnoli and Eugenio Chiarello and Cesare Faldini and Sandro Giannini",
year = "2010",
month = "5",
language = "English",
volume = "7",
pages = "135--139",
journal = "Clinical Cases in Mineral and Bone Metabolism",
issn = "1724-8914",
publisher = "CIC Edizioni Internazionali s.r.l.",
number = "2",

}

TY - JOUR

T1 - Bone mineral density of the proximal femur recovers after metal-on-metal hip resurfacing

AU - Cadossi, Matteo

AU - Moroni, Antonio

AU - Romagnoli, Matteo

AU - Chiarello, Eugenio

AU - Faldini, Cesare

AU - Giannini, Sandro

PY - 2010/5

Y1 - 2010/5

N2 - Bone resorption of the proximal femur is a frequent complication of total hip replacement. As hip resurfacing (HR) may load the bone more physiologically, we measured proximal femur bone mineral density (BMD) in 21 patients with HR. DEXA analysis was performed in the 7 Gruen zones and in the femoral neck pre-operatively and at 3, 9, and 24-months post-operatively. In Gruen zone-2 the BMD ratio decreased to 90±18.8% (p=0.0009) at 3-months and completely restored at 24-months to 100±17.7% (p=0.01). In Gruen zone-7 the BMD ratio decreased to 93±15.3% (p=0.05) by 3 months and surpassed the baseline to 105±14.8% (p=0.01) at 24-months. A positive correlation was observed between valgus positioning of the femoral component and BMD in Gruen zone-2 and 7 respectively. HR preserves the bone-stock of the proximal femur. When the femoral component is implanted in a valgus position BMD is further enhanced, thus potentially reducing the risk of femoral neck fractures.

AB - Bone resorption of the proximal femur is a frequent complication of total hip replacement. As hip resurfacing (HR) may load the bone more physiologically, we measured proximal femur bone mineral density (BMD) in 21 patients with HR. DEXA analysis was performed in the 7 Gruen zones and in the femoral neck pre-operatively and at 3, 9, and 24-months post-operatively. In Gruen zone-2 the BMD ratio decreased to 90±18.8% (p=0.0009) at 3-months and completely restored at 24-months to 100±17.7% (p=0.01). In Gruen zone-7 the BMD ratio decreased to 93±15.3% (p=0.05) by 3 months and surpassed the baseline to 105±14.8% (p=0.01) at 24-months. A positive correlation was observed between valgus positioning of the femoral component and BMD in Gruen zone-2 and 7 respectively. HR preserves the bone-stock of the proximal femur. When the femoral component is implanted in a valgus position BMD is further enhanced, thus potentially reducing the risk of femoral neck fractures.

KW - Bone mineral density

KW - Dual-energy x-ray absorptiometry

KW - Hip resurfacing

KW - Metal-on-metal

KW - Valgus

UR - http://www.scopus.com/inward/record.url?scp=78449245286&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78449245286&partnerID=8YFLogxK

M3 - Article

VL - 7

SP - 135

EP - 139

JO - Clinical Cases in Mineral and Bone Metabolism

JF - Clinical Cases in Mineral and Bone Metabolism

SN - 1724-8914

IS - 2

ER -