Bipolar Hip System
Dual-Centre Motion for Femoral Fractures and Avascular Necrosis
Bipolar Hip System
The bipolar hip prosthesis preserves the acetabulum and replaces only the femoral head and neck. Two independent motion centres provide a physiological range of motion in cases where total hip arthroplasty is not indicated.
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Product Features
Bipolar Concept
Two independent motion centres reduce stress on surrounding soft tissue.
Cemented Femoral Stem
Full bone-cement interface; preferred in osteoporotic patients.
HA-coated Cementless Stem
Hydroxyapatite surface supports rapid osseointegration.
Locking-Mechanism Bipolar Head
CoCr outer shell with PE 1020 liner; secure lock and independent motion.
Clinical Benefits
- check Acetabulum preserved; ideal where total hip arthroplasty is not indicated
- check First-choice protocol for femoral neck fractures and avascular necrosis
- check Dual motion centres reduce the risk of dislocation
- check Conversion to total hip arthroplasty is technically straightforward
Technical Specifications
1. Standard Cemented Femoral Stem
- add_circle Material: CoCr and Titanium
- add_circle Cement-compatible polished finish
- add_circle Neck angle: 135°
- add_circle Taper: 12/14 mm
- add_circle Sizes: 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8
2. Cementless Femoral Stem (Zweymüller)
- add_circle Material: CoCr and Titanium
- add_circle HA coating + angular anti-rotation surfaces
- add_circle Special body geometry minimising rotation risk
- add_circle Neck angle: 135°
- add_circle Taper: 12/14 mm
- add_circle Sizes: 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8
3. Calcar-Supported Femoral Stem
- add_circle Indication: insufficient trochanter minor and calcar support
- add_circle Material: CoCr (precision casting)
- add_circle Diameter: 10 / 12 / 14 / 16 / 18 mm
- add_circle Length: 250 / 350 / 450 mm
- add_circle Neck angle: 135°
- add_circle Taper: 12/14 mm
4. Metal Head
- add_circle Material: CoCr (polished surface)
- add_circle product_lines.spec_interior_cone_12_14
- add_circle Inner taper depth: 5 options (offset adjustment)
- add_circle Outer diameter: Ø28 / Ø32 / Ø36 mm
- add_circle Offset: −6 / −3 / 0 / +3 / +6
5. Bipolar Cup
- add_circle CoCr outer shell + PE 1020 liner assembly
- add_circle Secure locking mechanism
- add_circle Sizes: 42 / 44 / 46 / 48 / 50 / 52 / 54 / 56 / 58 / 60 / 62 mm
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