A400 Tapered Cementless Hip System
Proximal-loading and bone-conserving, with streamlined surgical instrumentation.
The A400 Tapered Cementless Hip System is based on a proven design concept that has over 25 years of excellent long-term clinical results. [1]
This proximal loading, bone conserving design with streamlined surgical instrumentation has become the standard in cementless hip arthroplasty. The A400 includes additional options to help surgeons address patient specific anatomy, including:
- Reduced distal taper option for proximal/distal femur mismatch
- Standard and lateralized offset
- Anteverted neck option
- 5 femoral head offsets
McLaughlin, J.R. and Lee, K.R. Total Hip Arthroplasty with and Uncemented Tapered Femoral Component. Journal of Bone and Joint Surgery. 6(90): 1290-6, 2008.
Design Rationale
Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim.
Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus.
Aenean leo ligula, porttitor eu, consequat vitae, eleifend ac, enim. Aliquam lorem ante, dapibus in, viverra quis, feugiat a, tellus. Phasellus viverra nulla ut metus varius laoreet. Quisque rutrum. Aenean imperdiet. Etiam ultricies nisi vel augue. Curabitur ullamcorper ultricies nisi.
Features and Benefits
01 Addresses a range of patient anatomy
- 15 sizes in both standard and lateral implant configurations
- 10 degree anteverted neck option
- 5 femoral head offsets
- Reduced distal design option for proximal/distal femur mismatch
02 Multiple advanced bearing options
- 28, 32, 36 and 40mm head diameters
- BIOCERAM AZUL, CoCr and BIOLOX®†delta ceramic femoral heads
- MAX Highly Crosslinked Polyethylene
- E-MAX Highly Crosslinked Polyethylene with vitamin E
03 Proximal plasma coating
Provides circumferential bony attachment, which has been shown to provide an effective barrier against the distal migration of debris. [1,2]
04 Polished, narrow neck
Reduces debris generation and impingement and provides greater range of motion.
05 Streamlined surgical instrumentation
Straight-forward, broach-only surgical technique and streamlined instrumentation can be used utilized a variety of surgical approaches.
BIOLOX delta is a registered trademark of Cerasiv GmbH Innovatives Keramick-Engineering and CeramTec AG Innovative Ceramic Engineering.
- Emerson RH Jr, Sanders SB, Head WC, Higgins L. Effect of Circumferential Plasma-Spray Porous Coating on the Rate of Femoral Osteolysis After Total Hip Arthroplasty. J Bone Joint Surg AM. 1999 Sept:81(9):1291-8.
- Bobyn JD, Jacobs JJ, Tanzer M, Urban RM, Aribindi R, Summer DR, Turner TM, Brooks CE. The Susceptibility of Smooth Implant Surfaces Peri-Implant Fibrosis and Migration of Polyethylene Wear Debris. Clin Orthop. 1995;311:21-9.
Sizes and Specs
The A400 Tapered Cementless Hip Stem was designed to address a range of surgical situations and includes 16 sizes and lateral offset, anteverted neck, and reduced distal taper options.
01 A400 Standard Stem Specifications
| Size | Neck Axis Distance (mm) | Offset (mm) | Stem Length (mm) | Distal Stem Length (mm) | Proximal Cross Section M-L Width (mm) |
Proximal Cross Section A-P Width (mm) |
Distal Cross Section M-L Width (mm) |
Distal Cross Section A-P Width (mm) |
|---|---|---|---|---|---|---|---|---|
| Standard Offset (135 degree Neck-Shaft Angle) | ||||||||
| 4.5 | 48.8 | 33.5 | 131.2 | 9.0 | 29.1 | 11.5 | 5.5 | 4.2 |
| 5.25 | 49.3 | 34.3 | 132.5 | 10.5 | 29.7 | 11.8 | 6.3 | 4.5 |
| 6 | 49.9 | 35.0 | 133.8 | 12.0 | 30.4 | 12.0 | 7.0 | 4.7 |
| 7.5 | 50.9 | 36.5 | 136.5 | 15.0 | 31.7 | 12.5 | 8.5 | 5.3 |
| 8.25 | 51.5 | 37.3 | 137.8 | 16.5 | 32.3 | 12.8 | 9.3 | 5.6 |
| 9 | 52.0 | 38.0 | 139.1 | 18.0 | 33.0 | 13.1 | 10.0 | 5.8 |
| 9.75 | 52.6 | 38.8 | 140.4 | 19.5 | 33.7 | 13.3 | 10.8 | 6.1 |
| 10.5 | 53.1 | 39.5 | 141.8 | 21.0 | 34.4 | 13.6 | 11.5 | 6.4 |
| 11.25 | 53.7 | 40.3 | 143.4 | 22.5 | 35.1 | 13.8 | 12.5 | 6.6 |
| 12 | 54.2 | 41.0 | 144.4 | 24.0 | 35.7 | 14.1 | 13.0 | 6.9 |
| 13.5 | 55.4 | 42.5 | 147.0 | 27.0 | 37.0 | 14.7 | 14.5 | 7.4 |
| 15 | 56.5 | 44.0 | 149.7 | 30.0 | 38.4 | 15.2 | 16.0 | 8.0 |
| 16.5 | 57.7 | 45.5 | 152.3 | 33.0 | 39.7 | 15.7 | 17.5 | 8.5 |
| 18 | 58.9 | 47.0 | 155.0 | 36.0 | 41.0 | 16.3 | 19.0 | 9.0 |
| 19.5 | 60.1 | 48.5 | 157.6 | 39.0 | 42.3 | 16.8 | 20.5 | 9.6 |
02 A400 Lateralized Stem Specifications
| Size | Neck Axis Distance (mm) | Offset (mm) | Stem Length (mm) | Distal Stem Length (mm) | Proximal Cross Section M-L Width (mm) |
Proximal Cross Section A-P Width (mm) |
Distal Cross Section M-L Width (mm) |
Distal Cross Section A-P Width (mm) |
|---|---|---|---|---|---|---|---|---|
| 4.5 | 52.4 | 38.5 | 131.0 | 9.0 | 29.1 | 11.5 | 5.5 | 4.2 |
| 5.25 | 52.9 | 39.3 | 132.3 | 10.5 | 29.7 | 11.8 | 6.3 | 4.5 |
| 6 | 53.5 | 40.0 | 133.6 | 12.0 | 30.4 | 12.0 | 7.0 | 4.7 |
| 6.75 | 54.0 | 40.8 | 134.9 | 13.5 | 31.0 | 12.3 | 7.8 | 5.0 |
| 7.5 | 54.6 | 41.5 | 136.2 | 15.0 | 31.7 | 12.5 | 8.5 | 5.3 |
| 8.25 | 55.2 | 42.5 | 137.6 | 16.5 | 32.3 | 12.8 | 9.3 | 5.6 |
| 9 | 55.8 | 43.0 | 138.9 | 18.0 | 33.0 | 13.1 | 10.0 | 5.8 |
| 9.75 | 56.3 | 43.8 | 138.9 | 19.5 | 33.7 | 13.3 | 10.8 | 6.1 |
| 10.5 | 56.9 | 44.5 | 140.2 | 21.0 | 34.4 | 13.6 | 11.5 | 6.4 |
| 11.25 | 57.1 | 45.3 | 141.5 | 22.5 | 35.1 | 13.8 | 12.5 | 6.6 |
| 12 | 58.1 | 46.0 | 142.9 | 24.0 | 35.7 | 14.1 | 13.0 | 6.9 |
| 13.5 | 59.3 | 47.5 | 144.1 | 27.0 | 37.0 | 14.7 | 14.5 | 7.4 |
| 15 | 60.5 | 49.0 | 146.8 | 30.0 | 38.4 | 15.2 | 16.0 | 8.0 |
| 16.5 | 61.7 | 50.5 | 152.1 | 33.0 | 39.7 | 15.7 | 17.5 | 8.5 |
| 18 | 63.0 | 52.0 | 154.7 | 36.0 | 41.0 | 16.3 | 19.0 | 9.0 |
| 19.5 | 64.2 | 53.5 | 157.4 | 39.0 | 42.3 | 16.8 | 20.5 | 9.6 |
03 A400 Anteverted Stem Specifications
| Size | Neck Axis Distance (mm) | Offset (mm) | Stem Length (mm) | Distal Stem Length (mm) | Proximal Cross Section A-P Width (mm) |
Proximal Cross Section M-L Width (mm) |
Distal Cross Section A-P Width (mm) |
Distal Cross Section M-L Width (mm) |
|---|---|---|---|---|---|---|---|---|
| Standard Offset (135 deg Neck-Shaft Angle) | ||||||||
| 6 | 49.4 | 34.3 | 134.8 | 12.0 | 29.5 | 10.0 | 6.0 | 4.7 |
| 7.5 | 50.4 | 35.8 | 137.5 | 15.0 | 30.9 | 10.5 | 7.5 | 5.3 |
| 9 | 51.5 | 37.3 | 140.1 | 18.0 | 32.2 | 11.1 | 9.0 | 5.8 |
| 10.5 | 52.6 | 38.8 | 142.7 | 21.0 | 33.5 | 11.6 | 10.5 | 6.4 |
| 12 | 53.7 | 40.3 | 145.4 | 24.0 | 34.8 | 12.1 | 12.0 | 6.9 |
| 13.5 | 54.8 | 41.8 | 148.0 | 27.0 | 36.1 | 12.7 | 13.5 | 7.4 |
| 15 | 56.0 | 43.3 | 150.7 | 30.0 | 37.5 | 13.2 | 15.0 | 8.0 |
| 16.5 | 57.2 | 44.8 | 153.3 | 33.0 | 38.8 | 13.7 | 16.5 | 8.5 |
| 18 | 58.3 | 46.3 | 156.0 | 36.0 | 40.1 | 14.3 | 18.0 | 9.0 |
| Lateralized Offset (132 deg Neck-Shaft Angle) | ||||||||
| 6 | 52.9 | 39.2 | 134.1 | 12.0 | 29.4 | 10.0 | 6.0 | 4.7 |
| 7.5 | 54.0 | 40.7 | 136.7 | 15.0 | 30.7 | 10.5 | 7.5 | 5.3 |
| 9 | 55.1 | 42.2 | 139.4 | 18.0 | 32.0 | 11.1 | 9.0 | 5.8 |
| 10.5 | 56.3 | 43.7 | 142.0 | 21.0 | 33.4 | 11.6 | 10.5 | 6.4 |
| 12 | 57.4 | 45.1 | 144.7 | 24.0 | 34.7 | 12.1 | 12.0 | 6.9 |
| 13.5 | 58.6 | 46.6 | 147.3 | 27.0 | 36.0 | 12.7 | 13.5 | 7.4 |
| 15 | 59.8 | 48.1 | 149.9 | 30.0 | 37.4 | 13.2 | 15.0 | 8.0 |
| 16.5 | 61.0 | 49.6 | 152.6 | 33.0 | 38.7 | 13.7 | 16.5 | 8.5 |
| 18 | 62.2 | 51.1 | 155.2 | 36.0 | 40.0 | 14.3 | 18.0 | 9.0 |
04 A400 Reduced Distal Taper Stem Specifications
| Size | Neck Axis Distance (mm) | Offset (mm) | Stem Length (mm) | Distal Stem Length (mm) | Proximal Cross Section M-L Width (mm) |
Proximal Cross Section A-P Width (mm) |
Distal Cross Section M-L Width (mm) |
Distal Cross Section A-P Width (mm) |
|---|---|---|---|---|---|---|---|---|
| Standard Offset (135 degree Neck-Shaft Angle) | ||||||||
| 12 | 54.2 | 41.0 | 144.4 | 24.0 | 35.7 | 13.1 | 8.0 | 6.9 |
| 13.5 | 55.4 | 42.5 | 147.1 | 27.0 | 37.0 | 13.7 | 9.5 | 7.4 |
| 15 | 56.5 | 44.0 | 149.7 | 30.0 | 38.4 | 14.2 | 11.0 | 8.0 |
| 16.5 | 57.7 | 45.5 | 152.3 | 33.0 | 39.7 | 14.7 | 10.5 | 8.5 |
| 18 | 58.9 | 47.0 | 155.0 | 36.0 | 41.0 | 15.3 | 12.0 | 9.0 |
| 19.5 | 60.1 | 48.5 | 157.6 | 39.0 | 42.3 | 15.8 | 13.5 | 9.6 |
| Lateralized Offset (132 degree Neck-Shaft Angle) | ||||||||
| 12 | 58.1 | 46.0 | 144.1 | 24.0 | 35.7 | 13.1 | 8.0 | 6.9 |
| 13.5 | 59.3 | 47.5 | 146.8 | 27.0 | 37.0 | 13.7 | 9.5 | 7.4 |
| 15 | 60.5 | 49.0 | 149.4 | 30.0 | 38.4 | 14.2 | 11.0 | 8.0 |
| 16.5 | 61.7 | 50.5 | 152.1 | 33.0 | 39.7 | 14.7 | 10.5 | 8.5 |
| 18 | 63.0 | 52.0 | 154.7 | 36.0 | 41.0 | 15.3 | 12.0 | 9.1 |
| 19.5 | 64.2 | 53.5 | 157.4 | 39.0 | 42.3 | 15.8 | 13.5 | 9.6 |
05 Femoral head options
Femoral head options include BIOCERAM AZUL, CoCr-alloy and BIOLOX®† delta in the following sizes and offsets:
| Size (mm) | Offset (mm) | |||||
|---|---|---|---|---|---|---|
| CoCr Alloy | 28 | -4 | 0 | +4 | +8 | +12 |
| 32 | -4 | 0 | +4 | +8 | +12 | |
| 36 | -4 | 0 | +4 | +8 | +12 | |
| 40 | -4 | 0 | +4 | +8 | – | |
| BIOLOX delta Ceramic | 28 | -3.5 | 0 | +3.5 | – | – |
| 32 | -4 | 0 | +4 | +7 | – | |
| 36 | -4 | 0 | +4 | +8 | – | |
| 40 | -4 | 0 | +4 | +8 | – | |
BIOLOX delta is a registered trademark of Cerasiv GmbH Innovatives Keramick-Engineering and CeramTec AG Innovative Ceramic Engineering.