Mpact offers a system of hemispherical press-fit acetabular shells in titanium alloy that provides different solutions according to patient needs, addressing primary and revision indications.
Cementless hemispherical shell design with porous coating surface treatment has a long and successful clinical history.[1, 2]
The Mpact shells follow this philosophy, enhancing primary and biological secondary stability thanks to Mectagrip, highly porous plasma spray coating.
OPTIMAL PRIMARY AND SECONDARY STABILITY
Thanks to the coefficient of friction, pore size and distribution of Mectagrip[3, 4]
LOCKING SYSTEM FOR THE LINER
Which minimizes micro-movements, preventing backside wear[5,6]
For a straight forward surgery for any preferred approach
MULTIPLE SHELL VERSIONS
Available to secure adequate fixation to the available bone stock
OPTIMIZED FEMORAL HEAD/SHELL DIAMETER RATIO
Head 36 mm available from shell size 52 mm
From size 46 mm to size 66 mm
From size 46 mm to size 76 mm
From size 56 to size 76 mm
Are available in Highcross crosslinked UHMWPE both in flat and hooded version
Are available in lengths of 15 mm to 70 mm
Are available in lengths of 25 mm to 55 mm
Mectagrip is the porous coating treatment applied to the Mpact shells, consisting of a layer of commercially pure titanium deposited through a special Vacuum Plasma Spray technique (VPS). The VPS method used to deposit the Titanium porous coating on the implant shows potential advantages:
Pure titanium composition for optimal biocompatibility;
High friction coefficient increasing grip at the bone interface with bone;
Favourable environment for bone:[3,7,8,9]
Locking systems for the polyethylene liners:
The MULTI-HOLE SHELL allows for the use of cancellous bone screws in 12 to 17 locations (size dependant) on the dome and equatorial region.
The RIM-HOLE SHELL allows use of cancellous and cortical bone screws
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 specialized instrumentation platform.
Using Mpact you can enter Medacta International’s world of AMIS.
The AMIS Mobile Leg Positioner will be supplied as part of the instrumentation to help ensure effective and reliable positioning of the leg during surgery. Traction, adduction and hyperextension have never been so easy.
 C Anderson Engh, Cementless acetabular components,JBJS (Br), vol. 72-b, No. 1, Jan 1990, 53-60.
 S. J. Incavo, F. A. Di Fazio, J. G. Howe, Cementless Hemispherical Acetabular Components, JoA Vol. 8, no. &, 1993, 573-80.
 P. Robotti, A. Sabbioni, L. Glass, B. George, Macroporous Titanium Coatings, by Thermal Plasma Spray, ITSC 2013, International Thermal Spray Conference, May 13 –15, 2013, Busan, Korea.
 Friction testing of the Mpact and Versafitcup coating samples. Data on file Medacta.
 Mpact liner wear test. Data on file Medacta.
 Push-out, lever-out and torsion test on the Mpact shell. Data on file Medacta.
 J. E. Biemond et al, In vivo Assessment of Bone Ingrowth Potential of 3-Dimensional E-Beam Produced Implant Surfaces and the Effect of Additional Treatments by Acid-Etching and Hydroxyapatite Coating, J. Biomat. Appl, published on line January 27, 2011, 0885328210391495.
 R. Ferro de Godoy et al., In vivo Evaluation of Titanium Macro-Porous Structures Manufactured Through an Innovative Powder Metallurgy Approach. Proceedings eCM XIII: Bone Fixation, Repair & Regeneration, June 24–26, 2012, Davos, Switzerland.
 A. Goodship et al, In-vivo Assessment of the Ingrowth Potential of Engineered Surface Topographies Produced by Spark Plasma Sintering, Proceedings 9th World Biomaterial Congress, June 1-5, 2012, Chengdu, China.
 Michael DR, MD, Review of the Evolution of the Cementless Acetabular Cup, ORTHOSuperSite December 1, 2008.