Learn more about the hip implants your surgeon may use

Ask your surgeon for more details

Your surgeon can provide you with information on the hip replacement they feel is best suited to your situation, should surgery be an option for you. 

If your surgeon uses Stryker products, ask them for a login to the Stryker Online Patient Resources, where you can learn more about the hip implant you may receive, what to expect during surgery, and what rehabilitation exercises you can do during your recovery. 

I am having a hip replacement using Stryker products. Which hip implant is best for me?

Your body is different from everyone else's, and so is your hip pain. Stryker’s personalised hip solutions provide extensive, technologically advanced and customisable options for getting you and your hip functioning again.

Stryker has some of Australia’s leading hip and knee replacement products. These include the most commonly used implants, recognised for their long-lasting performance.1

Your doctor will determine the optimal treatment for your unique anatomy and lifestyle, using Stryker’s portfolio of surgical products and advanced technologies. If you having a total hip replacement, these options include:

References
1 Australian Orthopaedic Association National Joint Replacement Registry. Annual Report. Adelaide: AOA; 2012.
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Hip replacement fit and fixation

Hip replacement fit and fixation

Your doctor will consider several factors when determining the appropriate hip implants for you, including which implant design will best fit your hip anatomy and how to fix your hip implant to the bone. 

Some implants require bone cement to secure, or fix, the implant in place. Bone cement has been used since the earliest procedures were done and is still used today. Usually bone cement is used in patients with poor bone quality to help stabilise the hip components.

Other implants are manufactured with special coatings and rough surfaces that help your natural bone grow onto it, to achieve fixation. To make this work, you need good quality bone and an implant with a porous surface or tiny beads. Sometimes a combination of cement and cementless hip components are used. 

Femoral stem options 

Stryker offers a wide variety of femoral stems options, so your doctor can select the one that fits you best. The femoral stem your doctor chooses will depend on your bony anatomy, your bone quality, age, and other clinical factors as well as surgeon preference.

Exeter ® Femoral Stem

The Exeter stem is a highly polished, stainless steel, cemented stem for use in total hip replacement. Offered by Stryker, the Exeter femoral stem is the most commonly implanted hip stem in Australia (Table HT3).1 More than 1 million Exeter stems have been manufactured, with over 45,000 have been implanted in Australia.

First implanted in 1970 in Exeter (UK), the stem has over 40 years of outstanding clinical performance globally including one of the lowest revision rates of any cemented stem. ( A revision is where a subsequent surgery is required to address any issues with the implanted prosthesis.  )

References:
1 Australian Orthopaedic Association National Joint Replacement Registry. Annual Report. Adelaide: AOA; 2013

SecurFit®

The SecurFit stem is a titanium alloy, cementless stem for use in total hip replacement. This stem design originated in 1986 and was the first cementless hip stem in orthopaedics to use a revolutionary coating, hydroxyapatite (known as HA).

Hydroxyapatite is a naturally occurring substance in human bone that encourages the patient’s natural bone to grow onto the surface of the implant. This is an alternative to using bone cement.

The SecurFit stem comes in two configurations; SecurFit and SecurFit Plus. Together, these two stems have been implanted over 10,000 times and over 96.4% are still performing well after 10 years.

 

 

What is HA?

Hydroxylapatite (HA) is a naturally occurring substance that closely resembles natural bone mineral. Bone mineral stores the body's supply of calcium and phosphorus – two minerals critical to your health and the two major components of HA are calcium and phosphorus.

HA is applied to some hip implants, particularly acetabular cups and femoral stems, to encourage bone to grow onto it.1 Clinical studies with HA show that patients had early pain relief and rapid restoration of function.1 HA coated femoral stems perform very well in young and active patients.1

Tritanium® Advanced Fixation Technology

Tritanium® technology lets the bone grow into the component,2 providing better fixation.3 It is a three-dimensional surface on the acetabular cup, and is made from the highest quality commercially pure Titanium. The new Tritanium® technology was designed to resemble trabecular bone, a type of spongy bone tissue that provides skeletal support.

Studies have shown that it improves bone ingrowth when compared to other alloys.4 This technology may be especially beneficial for patients with low bone density or osteoporosis.5

Did you know?

Hip replacement facts

  • Most joint replacement osteoarthritis patients feel that their joint replacement feels either normal (47%) or natural (33%).
  • Overall, they see an improvement in quality of life, participation in activities, and emotions toward the condition since joint replacement surgery.6

 

References
1. D’Antonio, et. al. Hydroxyapatitie Femoral Stems for Total Hip Arthroplasty: 10-13 Year Follow-up, CORR, Volume 393, Dec. 2001, pp. 101-111.
2. Stryker Test Report RD-08-009. Evaluation of bone response to porous surfaces using a canine total hip model.
3. Stryker Test Report RD-07-077.
4. Ricci J.L., Kauffman J., Jaffe, W., et al, “Comparison of Osseointegration and Bone Adhesion to Commercially Pure Titanium Alloy,” 23rd Ann.Mtg. Society for Biomaterials, 1997.
5. National Osteoporosis Foundation.
6. Harris Interactive® Patient Study commissioned & conducted by Stryker, September 2003.

 

Stryker Corporation or its divisions or other corporate affiliated entities own, use or have applied for the following trademarks or service marks: Accolade, Stryker, Tritanium, Exeter, X3. All other trademarks are trademarks of their respective owners or holders.
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Hip replacement implant longevity

Hip replacement implant longevity

The durability of hip implants depends on many things, including your weight and activity level, as well as the implant’s bearing surface technology. The ‘bearing surface’ is the two parts of the hip that glide together throughout motion. Newer technologies, like ceramic and improved plastics, can improve implant longevity for younger patients.

X3®

Stryker’s patented advanced bearing surface, the X3®, has demonstrated up to 97% decrease in wear in laboratory testing.1 This decrease in wear may extend the life of your hip implant.

Ceramic

In laboratory testing, Biolox delta ceramic is up to 50% stronger than alumina ceramic.2 The strength of this material allows manufacturing of increased number of sizes of femoral heads so your doctor has a broader implant selection to choose the implant that fits you best.

Ceramic-on-ceramic

Alumina ceramic bearings have demonstrated significantly lower wear versus conventional plastic-on-metal hip systems in the laboratory.3 It is anticipated that the improved wear characteristics of alumina ceramic will result in a longer lasting implant.

Trident

The Trident acetabular cup is made from a titanium alloy, and is pressed into position during total hip replacement. Launched in Australia in 1999, over 54,000 have been used in patients undergoing total hip replacement. The Trident cup offered by Stryker is the most commonly implanted acetabular cup in Australia in 2012 (Table HT4).4 Over one million people globally have been implanted using the Trident cup.

The Trident cup accepts both ceramic and polyethylene liners which are then coupled with either a ceramic or metal head which is fixed to the femoral stem. Your surgeon will discuss with you which bearing option is most appropriate for your body. In Australia, the Trident cup has the lowest revision rate of any cementless acetabular cup when used in combination with SecurFit Plus femoral component (Table HT3)5 with around 96% of products still performing well after a minimum of 10 years follow up.

Find out more about indications, contraindications and risk information.

References
1. Stryker® Orthopaedics Trident® Acetabular Inserts made of X3® UHMWPE (unsterilized), 721-00-32E, show a 97% reduction in volumetric wear rate versus the same insert fabricated from N2\Vac™ gamma sterilized UHMWPE, 620-00-32E. The insert tested was 7.5mm thick with an inner diameter of 32mm. Testing was conducted under multi-axial hip joint simulation for 5 million cycles using a 32mm CoCr articulating counterface and calf serum lubricant. X3® UHMWPE Trident® Acetabular Inserts showed a net weight gain due to fluid absorption phenomena but yielded a positive slope and wear rate in linear regression analysis. Volumetric wear rates were 46.39 ± 11.42mm3/106 cycles for N2\Vac™ gamma sterilized UHMWPE inserts and 1.35 ± 0.68mm3/106 cycles for X3® UHMWPE (unsterilized) Trident® Acetabular Inserts. Although in-vitro hip wear simulation methods have not been shown to quantitatively predict clinical wear performance, the current model has been able to reproduce correct wear resistance rankings for some materials with documented clinical results.a, b, c.
  • a. Wang, A., et al., Tribology International, Vol. 31, No. 1-3:17-33, 1998.
  • b. Essner, A., et al., 44th Annual Meeting, ORS, New Orleans, Mar. 16-19, 1998:774.
  • c. Essner, A., et al., 47th Annual Meeting, ORS, San Francisco, Feb. 25-28, 2001:1007.
2. Stryker Test Report RD-05-013.
3. Taylor, S.K., Serekian, P.,Manley, M., “Wear Performance of a Contemporary Alumina: Alumina Bearing Couple Under Hip Joint Simulation,” Trans. 44th Ann. Mtg. ORS, 51, 1998.
4, 5.  Australian Orthopaedic Association National Joint Replacement Registry. Annual Report. Adelaide, AOA, 2013.
Stryker Corporation or its divisions or other corporate affiliated entities own, use or have applied for the following trademarks or service marks: Stryker, Trident, X3. BIOLOX delta is a registered trademark of Cerasiv GmbH Innovatives Keramick-Engineering and CeramTec AG Innovative Ceramic Engineering. All other trademarks are trademarks of their respective owners or holders.
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Hip replacement motion and stability

Hip replacement motion and stability

We’re continually striving to make hip replacements more successful by reducing the risk of complications, and improving the performance of your implant. Although infrequent, one complication is the risk of hip dislocation after the surgery.

Hip dislocation occurs when the femoral head slides out of place during extreme motion. Between 3 and 4 per cent of patients receiving a total hip replacement experience hip dislocation.1 

To help prevent dislocation, your doctor will sure that the size of the implant closely matches the size and shape of your anatomy. Larger femoral heads also allow for more motion and enhanced joint stability than smaller femoral heads. Stryker’s Anatomic Femoral Heads are larger in size, similar to the top of your femur, so they are anatomically sized for more natural hip performance – helping to minimise dislocation and increase your range of motion.

 

References
1. Sanchez-Sotelo, J., et al., “Hospital Cost of Dislocation  After Primary Total Hip Arthroplasty” Journal of Bone and Joint Surgery, May 30, 2006, pg. 290.

Stryker’s Mobile Bearing Hip™ 

An innovation in hip replacement design, Stryker’s Mobile Bearing Hip™ replacement has a unique polyethylene insert (called anatomic dual mobility or ADM) made with X3® Advanced Bearing Technology. It fits snugly within the metal shell and over the ball to secure and buffer the joint.

Anatomic Dual Mobility

Typical fixed hip replacement components include a stem that inserts into the femur, a ball that replaces the head of the femur or top of the thigh bone, and a shell that lines the hip socket (acetabulum). The ADM allows both hip components to glide smoothly without the stem making contact with the shell. So your doctor can closely match the implant to your anatomy, giving you the following potential advantages:

Greater range of motion

The Mobile Bearing Hip™ Replacement is built for more natural movement. Test results demonstrated approximately 145º range of motion in a front-to-back sweep of the leg — a full 5% gain in range of motion when compared with fixed-bearing implants of equivalent size.1 It also let you walk more naturally, so you can maintain your active lifestyle with fewer compromises.

More comfortable and stable fit

Comfort and stability help you regain your activity level. The Mobile Bearing Hip™ Replacement is designed to help to minimize the potential risks of hip dislocation and irritation of the muscles and tendons that support your hip.2, 3

The specially designed cup is also less likely to impinge on the tendon that runs from the groin toward the front of the pelvic bone (iliopsoas tendon).3 This avoids hip stiffness, groin pain or a clicking sensation in the hip – signs that the pelvis catches the tendon when the hip flexes. 

Less wear and potential for a longer life

Stryker’s Mobile Bearing Hip™ with X3® offers better wear protection in two ways: dual mobility and the X3® technology bearing surface.4 Test results prove that X3® has shown a 97% decrease in wear compared to conventional polyethylene in laboratory testing.4 Less wear may mean a longer life for your hip replacement.4

References
1. Stryker Test Report: RD-06-078.
2. Stryker Test Report: RD-09-068.
3. Tracol P, Vandenbussche E, Deloge N, et al. (2007). Navigation Acetabular Anatomic Study Application in the Development of a New Implant. EFORT Poster.
4. Stryker® Orthopaedics Triden Acetabular Inserts made of X3® UHMWPE (unsterilized), 721-00-32E, show a 97% reduction in volumetric wear rate versus the same insert fabricated from N2\Vac™ gamma sterilized UHMWPE, 620-00-32E. The insert tested was 7.5mm thick with an inner diameter of 32mm. Testing was conducted under multi-axial hip joint simulation for 5 million cycles using a 32mm CoCr articulating counterface and calf serum lubricant. X3®; UHMWPE Trident®; Acetabular Inserts showed a net weight gain due to fluid absorption phenomena but yielded a positive slope and wear rate in linear regression analysis. Volumetric wear rates were 46.39 ± 11.42mm3/106 cycles for N2\Vac gamma sterilized UHMWPE inserts and 1.35 ± 0.68mm3/106 cycles for X3®; UHMWPE (unsterilized) Trident® Acetabular Inserts. Although in-vitro hip wear simulation methods have not been shown to quantitatively predict clinical wear performance, the current model has been able to reproduce correct wear resistance rankings for some materials with documented clinical results.a, b, c.
  • a. Wang, A., et al., Tribology International, Vol. 31, No. 1-3:17-33, 1998.
  • b. Essner, A., et al., 44th Annual Meeting, ORS, New Orleans, Mar. 16-19, 1998:774.
  • c. Essner, A., et al., 47th Annual Meeting, ORS, San Francisco, Feb. 25-28, 2001:1007.
The information presented is for educational purposes only. Stryker is not dispensing medical advice. Only your doctor can make the medical judgment which products and treatments are right for your own individual condition. Please consult with your own doctor before implementing any of the above suggestions or beginning any new exercise, diet or treatment program.
Stryker Corporation or its divisions or other corporate affiliated entities own, use or have applied for the following trademarks or service marks: Mobile Bearing Hip, Stryker, X3. All other trademarks are trademarks of their respective owners or holders.

 

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Next Steps

Contact your GP or health professional to discuss your options