Product Overview
AMIStem-P is the evolution of a successful and proven femoral stem concept, originally born to simplify the AMIS approach without compromising implant stability.
On the basis of the remarkable clinical heritage of AMIStem-H, AMIStem-P was developed with the goal of providing an improved load transfer through the application of a state-of-the-art coating (MectaGrip) on the proximal part of the stem, to be able to better address the modern challenges in THA. The AMIStem-P System features also a collared (AMIStem-P Collared) and a cemented (AMIStem-C) version.
Specifically designed for AMIS
AMIStem-P maintains the same geometry as the AMIStem-H. Its triple tapered design characterized by a reduced lateral flare and an optimized length, which allows for reduced bone removal and for an easier stem implantation when utilizing the AMIS approach without compromising implant stability based on the clinical experience of straight, rectangular cementless hip stems.
Performance Coating
MectaGrip coating aims to provide an enhanced proximal fill at the metaphyseal level, and a mechanically stronger bone implant interface, this results in potentially improved load transfer.[4]
The whole endosteal part of the stem is Hydroxyapatite coated.
Meeting today's challenges
Young and active patients are the toughest challenge in THA today. The revision rate for patients younger than 55 years is significantly higher across pathologies.[17]
Mechanically stronger bone implant interface can help meet these challenges allowing higher loads to be transferred.
Anatomical head center growth
Literature tells us that femoral offset should increase progressively with stem size. AMIStem’s neck length increases size by size to allow for anatomical head center growth and to efficiently restore the hip joint biomechanics in a growing patient population. Vertical offset does not change when adding lateral offset for each size implant, thus leg length is not affected when changing from standard to lateralized. (http://www.medacta.us.com/US/home-med-pro-us)
