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The influence of reverse arthroplasty humeral component design features on scapular spine strain.
Kerrigan, Alicia M; Reeves, Jacob M; Langohr, G Daniel G; Johnson, James A; Athwal, George S.
Afiliación
  • Kerrigan AM; Investigations conducted at the Bioengineering Laboratory at the Roth|McFarlane Hand and Upper Limb Centre, St. Joseph's Hospital, London, ON, Canada.
  • Reeves JM; Investigations conducted at the Bioengineering Laboratory at the Roth|McFarlane Hand and Upper Limb Centre, St. Joseph's Hospital, London, ON, Canada.
  • Langohr GDG; Investigations conducted at the Bioengineering Laboratory at the Roth|McFarlane Hand and Upper Limb Centre, St. Joseph's Hospital, London, ON, Canada.
  • Johnson JA; Investigations conducted at the Bioengineering Laboratory at the Roth|McFarlane Hand and Upper Limb Centre, St. Joseph's Hospital, London, ON, Canada.
  • Athwal GS; Investigations conducted at the Bioengineering Laboratory at the Roth|McFarlane Hand and Upper Limb Centre, St. Joseph's Hospital, London, ON, Canada. Electronic address: gathwal@uwo.ca.
J Shoulder Elbow Surg ; 30(3): 572-579, 2021 Mar.
Article en En | MEDLINE | ID: mdl-32621980
BACKGROUND: Reverse shoulder arthroplasty (RSA) humeral implant parameters have been previously studied with respect to range of motion, deltoid function, and stability. However, limited literature exists on the influence of humeral design features on scapular spine strain. The purpose of this cadaveric biomechanical simulator study was to evaluate the role of humeral component lateralization and neck-shaft angle (NSA) on scapular spine strain. METHODS: Eight fresh-frozen cadaveric shoulders were tested using an in vitro shoulder simulator. A custom-designed modular RSA system was implanted that allowed for the in situ adjustment of humeral lateralization and NSA. Scapular spine strain was measured by strain gauges placed along the acromion and scapular spine in clinically relevant positions representative of the Levy fracture zones. All testing was conducted in both abduction and forward elevation. RESULTS: In Levy zones 2 and 3, increasing humeral lateralization caused significant incremental decreases in scapular spine strain at 0° and 90° abduction (P < .042). Strain decreases as high as 34% were noted with increases in humeral lateralization from -5 to 15 mm (P = .042). Changing NSA had no statistically significant effect on scapular spine strain (P > .14). CONCLUSIONS: Some humeral implant design features in RSA have effects on scapular spine strain. Humeral component lateralization had significant effects, whereas adjusting NSA resulted in no substantial differences in scapular spine strain. Understanding humeral component variables is important to allow for design optimization of future RSA implants.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Articulación del Hombro / Artroplastía de Reemplazo de Hombro / Prótesis de Hombro Límite: Humans Idioma: En Revista: J Shoulder Elbow Surg Asunto de la revista: ORTOPEDIA Año: 2021 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Articulación del Hombro / Artroplastía de Reemplazo de Hombro / Prótesis de Hombro Límite: Humans Idioma: En Revista: J Shoulder Elbow Surg Asunto de la revista: ORTOPEDIA Año: 2021 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Estados Unidos