Hipokrat 2000 CR Knee Replacement System

Hipokrat 2000 CR Knee Replacement System

Cruciate-Retaining Design
As the name implies, the posterior cruciate ligament is kept with this implant design (the anterior cruciate ligament is removed). Cruciate-retaining implants do not have the center post and cam design. This implant may be appropriate for a patient whose posterior cruciate ligament is healthy enough to continue stabilizing the knee joint.

Minimally constrained prosthesis that depends on an intact PCL to provide stability in flexion

Indications
• Arthritis with minimal bone loss, minimal soft tissue laxity, and an intact PCL
• Varus deformity < 10 degrees – valgus deformity < 15 degrees

Radiographs
Radiographs won’t show box in the central portion of the femoral component as PS knees have

Advantages
• Avoids tibial post-cam impingement/dislocation that may occur in PS knees
• More closely resembles normal knee kinematics
• Less distal femur needs to be cut than in a PS knee
• Improved proprioception with preservation of native PCL
• Newer poly-options can allow for PCL substitution via anterior-stabilized or ultra-congruent shapes in cases of PCL insufficiency without loss of functional results

Disadvantages
• Tight PCL may cause accelerated polyethylene wear
• Loose or ruptured PCL may lead to flexion instability and subluxation

Kategoriler:

The femoral implant compresing of 3 sliding surfaces in contact with polyethelene, is a Cr.Co alloy who’s reliability needs no further proof. The patellar groove is deeply hollowed and presents an anatomically aligned outline. This feature serves for better patellar guidance and relief of strain on the knee extensor apparatus. The femoral component is available in a cemented and a non-cemented version. A posterior stabilised version for more stabilisation is also available.

• Anatomical 9 sizes femoral compenent offers optimal fit
• MRI safe Conditional option
• Cr.Co.Mo. alloy
• Rough inner surface provides strong cementation
• Cemented and Uncemented options
• Anatomic patellofemoral track
• Deep patella groove provides stable pattelofemoral tracking
• 7 degree anterior flange

The tibial insert of ‘‘HİPOKRAT 2000 knee prosthesis’’ is an polyethelene high density .This choice is motivated by the excelent mechanical properties of this materials both in its strength and its tribological (low friction) qualities. This High density materials, proved for many years in the most reliable hip and knee prostheses, stil being unequalled today. It is here meticulously machined on specific dedicated machining centres, eliminating all risks of contamination. The tibial insert is available in 6 different heights of 6, 8, 10, 12, 15 and 18 mm so that the joint height can be restored depending on the degree of tibial bone substance loss. An ultracongruent and a posterior stabilised version for more stabilisation are also available.

• Higher anterior surface will prevent the paradoxial anterior sliding
• Captured attachment screw
• 5 Sizes, 6 thicknesses (6, 8, 10, 12, 15 and 18 mm)
• Anatomic radius
• UHMWPE pollyethelene

The tibial plate has been designed in Cr.Co.Mo., and have rough inner surface to provides strong cementation. A locking screw which completely locks the tibial insert and ensures positive anchorage (without the slightest risk of the system being ejected). We add a final security. This locking screw is itself fitted with a locking mechanism.

• 9 sizes offers optimal fit
• MRI safe Conditional option
• Cr.Co.Mo. alloy
• Improved locking mechanism design
• Wings growing according to the size to ensure better stability.

The patella is an polyethelene with offers the most ceratin contact and friction behaviour with the Cr.Co. trocchlea. Patellar implant is designed to help fill in lost patellar bone, restoring the patellofemoral joint space to its normal height.

• Smooth anatomical design
• UHMWPE pollyethelene
• 5 different diameter (31, 33, 35, 37 and 39 mm)
• Choice of one-peg and three-peg fixation modes are avaliable for increased flexibility

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