CONCEPT
AMIStem - THE LOGICAL EVOLUTION OF HIP STEM DESIGN
The AMIStem has been developed to facilitate broaching and stem insertion when utilising the AMIS approach without compromising implant stability. Based on the clinical experience of straight, rectangular, cementless hip stems, the AMIStem incorporates features which simplify the AMIS approach.
BONE PRESERVING, AMIS FRIENDLY
PRODUCTO RANGE
AMIStem-H
11 STANDARD sizes, from 00 to 9, with 135° neck-shaft angle
9 LATERALIZED sizes, from 0 to 8, with 127° neck-shaft angle
AMIStem-H Collared
Collared stems are available both in standard and lateralized option.
11 STANDARD sizes, from 00 to 9, with 135° neck-shaft angle
9 LATERALIZED sizes, from 0 to 8, with 127° neck-shaft angle
AMIStem-C
9 STANDARD sizes, from 0 to 8, with 135° neck-shaft angle
9 LATERALIZED sizes, from 0 to 8, with 127° neck-shaft angle
TECNICAL DATA
AMIStem-H
AMIStem-H
NECK
- The mirror polished surface treatment minimises soft tissue damage and liner wear, making the AMIStem-H suitable for double mobility liners.
- Increasing size by size to restore anatomy.
SHAPE
- The triple tapered design provides good axial and rotational stability with optimal fixation with bone.
- The rectangular cross-section facilitates effective stability but also promotes the preservation of bone vascularisation, since the diaphysis is not completely filled.
SURFACE TREATMENT
The horizontal and vertical macrostructures increase stability and enhance the contact surface area by 10-15%.
TIP
The double tapered distal tip reduces the risk of stress peak in the diaphysis.
MATERIAL
- AMIStem-H and AMIStem-H Collared are made of Titanium- Niobium alloy in accordance with ISO 5832-11. Their surface presents a 80 μm thick Hydroxyapatite (HA) coating after a superficial sand-blasting of 4 to 7 μm roughness.
- The HA coating has chemical characteristics similar to that of the human bone which stimulates the bony ongrowth.
AMIStem-H Collared
AMIStem-H Collared
AMIStem-H Collared is an additional option to the AMIStem System which is now even more flexible and able to include all patient needs and bone anatomies.
COLLAR
- The collar width increases with size.
- May assist in the prevention of subsidence in patients that present Dorr Type C bone.
NECK
- The mirror polished surface treatment minimises soft tissue damage and liner wear, making the AMIStem-H Collared suitable for double mobility liners.
- Increasing size by size to restore anatomy.
SHAPE
- The triple tapered design provides good axial and rotational stability with optimal fixation with bone.
- The rectangular cross-section facilitates effective stability but also promotes the preservation of bone vascularisation, since the diaphysis is not completely filled.
SURFACE TREATMENT
The horizontal and vertical macrostructures increase stability and enhance the contact surface area by 10-15%.
TIP
The double tapered distal tip reduces the risk of stress peak in the diaphysis.
SURFACE TREATMENTINSTRUMENTATION
INSTRUMENTATION
- The same tray to implant AMIStem-H, AMIStem-H Collared and AMIStem-C.
- Both standard and lateralised trial necks fit onto the broaches for a quick and precise trial reduction.
- Offset broach handles available.
- High quality sharp broaches for a precise preparation of the medullary cavity.
- Optional monoblock motorised broaches available for use with femoral stem trials.
- Dedicated AMIS instrumentation.
THE AMIS SYNERGY
REDEFINING THR: THE AMIS SYNERGY
The anterior approach, strengthened by several years of clinical experience, is the only technique which follows a path both intermuscular and internervous and therefore reduces considerably the risk of damaging periarticular structures such as muscles, tendons, vessels and nerves.
Medacta International is the world leader for educating and supporting surgeons in their pursuit of Anterior Minimally Invasive Surgery (AMIS). Reference Centers, located throughout the world, provide the necessary AMIS educational experience and Medacta offers continuous support for surgeons, as well as constantly improving and developing the industries most specialised instrumentation platform.
Using AMIStem you can enter Medacta International’s world of AMIS.
Discover:
- The definitive MIS approach: AMIS;
- Dedicated AMIS instrumentation;
- The AMIS Mobile Leg Positioner: the original orthopaedic extension table included as part of the instrumentation that makes the surgery easier and reproducible;
- The AMIS Education Programme based on Medacta’s proven educational methods.
- AMIS & AMIStem
Thanks to its unique design, AMIStem is the logical femoral stem for the AMIS approach:
Una guía de orientación está disponible para ayudar en el posicionamiento de la copa: la guía de orientación se colocará en la parte superior del impactador de la copa. La antena de la guía de orientación debe orientarse horizontalmente (inclinación 40 ° - 45 °) y la barra separada para la guía de orientación debe orientarse perpendicularmente a la mesa de operaciones (15 ° -20 ° anteversión).
