Orthopaedics
Hip
Lubinus SP II
Anatomically shaped stem
• for physiological load transfere
• uniform cement mantle
• to resist rotational forces
• Large collar support achieves reintroduction of physiological forces into the femur
• Built in physiological anteversion of 19°
• AP / ML Ribs for additional rotational stabilty
• Distal edge lateraly curved to avoid lateral impingement
S-Curvature
“The most important advancement in total hip arthroplasty this decade has been the adaption of femoral components to the anatomy of the femur.“ The anatomical shape of the SP II stems follows exactly the anatomy of the proximal femur
Cement Distribution and Quality of Fixation
In comparison to an anatomically designed stem, a straight stem produces an uneven cement mantle in the upper, center, and lower portions of the medullary canal. The larger surface area of the LINK® SP II stem, together with the even cement mantle surrounding the stem, results in a uniform fixation of the prosthesis in the femur.
Equal Stress Distribution
Stress-load analysis proves that the true adaption of the LINK® anatomically shaped hip stems to the femur result in the most natural stress distribution, eliminating the harmful pinpoint stress concentration at the bone / (cement) / implant interface.
Rotational Forces
The axis of posterior rotation is outside the curved neutral axis of the stem due to the S-shape,
• In this way, the mechanical shape of the prosthesis acts to further reduce rotational movement of the prosthetic stem within the curved canal.
MP™ Reconstruction Hip Stem
The MP™ Reconstruction Hip Stem is designed to replace loosened hip prostheses particularly in cases of extensive proximal femur defects that no longer permit implantation of standard prosthesis. There is evidence that uncemented distal fixation of tapered stems manufactured from Titanium facilitates new bone formation in the proximal femur.
The modularity achieved by using a variety of prosthetic components allows for optimal adjustment to the patient’s anatomical needs, to correct leg-length, to provide optimal offset, and to position appropriate ante-version.
Modular system, consisting of Prosthesis Head, Stem, Neck Segments with taper, Proximal Spacers for leg length adjustment, and Fixation Screws with UHMW Polyethylene
Lock Bolt
Distal, uncemented stem fixation
Tapered stem shape distally ensures secure fixation
Rotational stability due to longitudinal ribs on distal stem
Angle of 3 degrees in the upper stem area facilitates implantation and counteracts rotational forces
Microporous or HX® (calciumphosphate)-coated surfaces promote bone integration
Lateralization and correct ante-version using a variety of modular Neck Segments, intraoperatively
Leg length correction of up to 30 mm using Proximal Spacers, intraoperatively
Prosthetic femoral heads made from Cobalt-Chromium Alloy metal or Aluminum Oxide Ceramic of varying diameters and lengths
Straightforward implant technique with “step-by-step” instrumentation
MBA Total Hip System
To face some particular anatomical situations and to limitate the risks of dislocation, it is sometimes necessary to adapt the implant shape :
MODULARITY :
Find an answer to the several anatomical situations.
DOUBLE TAPER/NECK :
To answer the need of modularity.
To make easier the revisions of the acetabular cup.
ANATOMICAL :
The 8 sizes of the proximal end provide an optimal metaphyseal filling.
The implant curvature enhances the metaphysoprothetical congruence.
The asymetric, refined and distal end reduces the risk of painful anterior cortical contact.
The stem closely approaches the physiological anterversion.
