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Specific Design of a Press Fit Humeral Stem Provides low Stress Shielding in Reverse Shoulder Arthroplasty at minimum 5 Years FU.
Nourissat, Geoffroy; Corsia, Simon; Harris, Howard W; Bouché, Pierre-Alban.
Afiliação
  • Nourissat G; Clinique de l'épaule, COS Ramsay Santé, Clinique des Maussins & Clinique Saint Jean de Dieu, Paris, France.
  • Corsia S; Service de Chirurgie Orthopédique Hôpital Cochin, APHP, Paris, France.
  • Harris HW; Texas Orthopedic Specialists, PLLC, Bedford, TX, USA.
  • Bouché PA; Service de Chirurgie Orthopédique Hôpital Lariboisière Saint Louis, Paris, France.
J Shoulder Elb Arthroplast ; 6: 24715492221112543, 2022.
Article em En | MEDLINE | ID: mdl-35832511
ABSTRACT
Press fit fixation is becoming more popular in RSA to preserve, in theory, bone capital. Several studies report that bone resorption can be very high around humeral stems depending on their size, shape and mode of fixation. The aim of the current study is to mid-term follow-up clinical and radiological result of a press fit ovoid regular stem RSA in non acute trauma cases. Materials and

Methods:

We performed a retrospective monocentric study of patients continuously implanted with the Humeris® stem RSA for degenerative change of the shoulder. Nineteen shoulders, in eighteen patients (74.6 y.o (from 69 to 81)), were available at minimum five years follow-up.

Results:

The mean final adjusted Constant score was 111.9 (65 to 130), and the mean ASES score was 49.82 (10 to 60). Humeral resorption was observed in 21% of cases. We found a statistically significant (p = .014) lower adjusted Constant score in patients presenting with resorption on post-operative X-rays compared to those without resorption (115.6 vs. 98.25). Half cases of patients presenting a resorption underwent L'Episcopo procedure during surgery. Humeral resorption occurs the first year after surgery and do not increase even 8 years after surgery. Analysis demonstrated no correlation between the value of filling ratios and bone resorption.

Conclusion:

The current study confirms a low rate of stress shielding around the studied stem, with rare bony resorption and no osteopenia around the humeral stem. This study highlights the importance of choosing the appropriate proximal shape and length of the humeral stem for press fit fixation in RSA.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article