EXACTECH HIP
1 / 8Páginas

How do you ensure optimal post-operative joint stability? Joint stability can be affected by many factors, including offset and leg length. When the selected primary stem provides adequate leg length but the joint requires additional offset, the concern is potential post-operative dislocation. Do you sacrifice leg length or offset? With the AcuMatch® M-Series, you sacrifice neither. The M-Series uncouples offset and leg length, providing surgeons a unique way to restore joint stability in complex total hip arthroplasty. Leg length and offset challenges are easily overcome by selecting from...

High Offset MECHANICAL RANGE OF MOTION Cup Position: 45 degrees abduction, 20 degrees anteversion 5,6 Offset Length • High and low offset necks predictably restore normal anatomy.1,2,3,4 • Multiple vertical height options provide for leg length adjustment. • Machined neck flats decrease neck cross section resulting in an increase in range of motion.5,6,7,8 • Low Plasticity Burnishing increases fatigue strength of neck segment by more than 30 percent.14 Adjust leg length without affecting offset Adjust offset without affecting leg

How do you deal with unpredictable bone loss? Nothing is routine about revision total hip surgery. It is an art. Frequently, unpredictable bone loss results from retrieval of the previously implanted stem. What do you do? The AcuMatch M-Series’ patented three-segment stem design* gives you more than 33,000 possible neck/metaphyseal/stem constructions. Customize your solutions to a wide range of proximal bone-loss situations. *Combined with Exactech’s five femoral head length

• Trapezoidal shape provides excellent rotational stability for proximal loading and ensures greater bone surface contact.9 • Optimized interference fit and 1mm of pure titanium plasma spray achieve the goal of biologic attachment. • Available in diameters of 21-31mm and x-small (21, 23 and 25mm only), small, medium and large flare options. • Calcar replacing segments are available for instances where the medial flare of the metaphysis is deficient. PROXIMAL/DISTAL MISMATCH A A: Smallest stem coupled with largest metaphyseal segment B: Largest stem coupled with smallest metaphyseal

How do you establish neck version when using a long curved stem? In some patients, the bow of the femur is lateral. In others, the acetabulum is slightly anteverted or retroverted. If you need a long curved stem for a patient with atypical anatomy, do you choose neck version or stem placement? With the M-Series, you don’t have to choose. The M-Series allows independent neck version and stem placement to minimize the potential for femoral fractures and post-operative dislocation.

CROSS SECTION OF STEM SEGMENT Longitudinal flutes provide rotational stability Stem segment rotated to match anatomy without affecting neck version • Sharp flutes provide a solid fit in the canal resulting in rotational stability. • Coronal slot and patented distal tip geometry decrease the incidence of thigh pain.10 Infinite placement of neck segment • Forged titanium more closely matches the modulus of elasticity of

Finite Element Analysis of M-Series Taper M-SERIES NECK FATIGUE STRENGTH1' Cycles (millions) What do you want most from your prosthesis? Confidence in design and construction is an important factor in prosthesis selection. Exactech® optimized the AcuMatch M-Series design using Finite Element Analysis and extensive mechanical testing. Its taper integrity and strength have been validated at a respected independent laboratory.11 Testing — including bending and torsion — simulated physiological loading which represented activities of daily living.12'13 The results categorized taper wear as...