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Revista Española de Cirugía Ortopédica y Traumatología (English Edition)
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Inicio Revista Española de Cirugía Ortopédica y Traumatología (English Edition) Prosthetic Version and Healing of the Greater Tuberosity: Their Influence on Fun...
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Vol. 51. Issue 1.
Pages 7-14 (January - February 2007)
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Vol. 51. Issue 1.
Pages 7-14 (January - February 2007)
Original papers
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Prosthetic Version and Healing of the Greater Tuberosity: Their Influence on Functional Outcome in Implanted Hemiarthroplasties due to Fractures of the Proximal Humerus
Influencia de la versión protésica y de la consolidación del troquíter en el resultado funcional de las hemiartroplastias implantadas por fractura de húmero proximal
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A. Ginésa, C. Torrensa,
Corresponding author
86925@imas.imim.es

Corresponding author: Department of Orthopedic and Trauma Surgery IMAS. Hospital del Mar. Passeig Marítim 25-29. 08003 Barcelona.
, A. Solanob, A. Ruiza, S. Martíneza, E. Cáceresa
a Department of Orthopedic Surgery IMAS. Del Mar and La Esperanza Hospitals. Barcelona
b Radiodiagnosis Department IDIMAS-CRC. Del Mar Hospital. Barcelona
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Article information
Purpose

To determine the influence of the prosthesis used and of greater tuberosity healing on the final functional result of shoulder hemiarthroplasties due to fracture of the proximal third of the humerus.

Materials and methods

This was a prospective study of 32 hemiarthroplasties with a mean followup of 43.51 months. X-ray control was carried immediately after surgery and at the end of the followup to assess the reduction of the greater tuberosity. Also at the end of the followup axial CAT scans (implant retroversion study), a functional assessment (Constant functional scale), and a health status determination (EuroQol-5D) were performed.

Results

The mean global value of the Constant scale for this series was 61.12. As to retroversion: values of 20–40° were seen in 8 patients, 0–20° in 20 patients and anteversion >0 in 4 patients. When the prosthesis model variable was compared using the Constant scale to determine functional outcome, no significant differences were seen (p=0.558). However, there was a trend to a better value in the Constant scale when the version of implant used was more anatomical, but this was not statistically significant.

Conclusions

There was a correlation between the quality of immediate postoperative reduction of the greater tuberosity, healing of the greater tuberosity and final functional outcome. There was a trend towards worse functional outcome in hemiarthroplasties with retro and anteversion values that were further from normal, but this was not statistically significant.

Key words:
hemiarthroplasty
shoulder
fracture
Objetivo

Determinar la influencia de la versión protésica y la consolidación de la tuberosidad mayor en el resultado funcional final de las hemiartroplastias de hombro por fractura del tercio proximal de húmero.

Material y método

Estudio prospectivo de 32 hemiartroplastias con un seguimiento medio de 43,51 meses. Se ha efectuado un control radiológico en el postoperatorio inmediato y al final del seguimiento para evaluar la reducción obtenida del troquíter. También al final del seguimiento se ha realizado un estudio mediante tomografía axial computarizada (estudio de retroversión del implante), una evaluación funcional (escala funcional de Constant) y una valoración del estado de salud (EuroQol-5D).

Resultados

El valor global medio de la escala de Constant de la serie fue de 61,12. En cuanto a la retroversión, en 8 pacientes se obtuvo un valor entre 20-40°, en 20 pacientes un valor entre 0-20° y en 4 pacientes anteversión superior a 0°. Al comparar la variable versión protésica con el resultado funcional mediante la escala de Constant no se encontraron diferencias significativas (p = 0,558), aunque existe una tendencia hacia un mejor valor en la escala de Constant cuanto más anatómica sea la versión del implante.

Conclusión

Existe una correlación entre la calidad de la reducción postoperatoria inmediata de la tuberosidad mayor, la consolidación de la misma y el resultado funcional final. Existe una tendencia a presentar un peor resultado funcional en aquellas hemiartroplastias cuya colocación se aleja más de los valores considerados como normales de versión, aunque sin significación estadística.

Palabras clave:
hemiartroplastia
hombro
fractura
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Copyright © 2007. Sociedad Española de Cirugía Ortopédica y Traumatología (SECOT). All rights reserved
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