THR – Total Hip Replacement

Total hip replacement surgery removes and replaces both the ball and socket of the hip with prostheses. Various hip replacements systems are available on the market, which include metal or ceramic balls at the top of the femur that fits into a cup. The prostheses are generally held in place using bone cement or screws, which are referred to as ‘cementless’ implants.

“Replacement of the hip is the only permanent, satisfactory form of treatment of canine coxofermoral osteoarthritis. Increasingly, use of cementless prosthesis is becoming the method of choice.“
D. Koch and M. S. Fischer, Diagnosing Canine Lameness, 2020, Thieme

Zurich Cementless Hip Replacement System

The Zurich Cementless hip replacement system features some unique design elements, which makes it the most advanced hip replacement system on the market.

Simplicity and Versatility

• Zurich Cementless includes a wide range of sizes for THR for toy to giant breed dogs, but also a unique solution for high luxation risk patients (Dual Mobility), a partial hip replacement system (Cupless), and revision cups for thee THR systems.
• A wide range of medullary canal dimensions can be covered by a minimal set of stems.
• Modular system to combine different sizes of stems, necks, heads, and cups to comfort your patient anatomical needs perfectly.

Femoral simplicity

Acetabular versatility THR for mini to giant breed dogs and cats “Cupless” Dual Mobility Revision solution

Cementless & Immediate fixation of all components

• Locking screw technology eliminates micromotion of the femoral component.
• The stem is affixed to the medial cortex only, preventing the stress-shielding of the proximal femur and allowing the implant to grow with the femoral bone structure.
• A hydroxyapatite surface modification of the stem and cup promotes rapid bone integration.

THR

The Zurich Cementless THR is designed to relieve chronic joint pain and provide a fully functional recovery. Over the last 20 years, more than 20,000 dogs worldwide have been treated with the Zurich Cementless hip replacement system. Until today, the system has gone through multiple iterations aiming to improve the long-term performance of the device.

Resistance to wear

• Resistance to wear is achieved by optimal material selection and proprietary design. The ceramic head and CFR-PEEK cup pairing are proven to reduce wear particles and therefore decrease the risk for revision.

6th generation Zurich Cementless THR

KYON is the first company offering ceramic heads for veterinary THR. Advanced ceramic heads are made of Zirconia Toughened Alumina, a material extensively used in human orthopedics and known for its extreme hardness, toughness, and biocompatibility Titanium and titanium alloy for supreme biocompatibility and reduced risk of infection Proprietary, wear-reducing geometry for the PEEK and CFR-PEEK inlay Porous titanium and hydroxyapatite coating for rapid integration Cementless – Immediate fixation of the implant through advanced locking screw technology reduces the risk of aseptic loosening associated with cemented implants

Stable fixation of the cup

• Double titanium shell, the outer one perforated and plasma coated with titanium and hydroxyapatite promotes rapid bone ingrowth.
• Geometrical features of the outer shell and calibrated reaming of the acetabulum allow for a reliable press-fit to provide stability during bony ingrowth.
• Outer shells are highly compliant, preventing the stress-shielding of the cancellous bone bed yet providing for the stable anchorage of the inner shells and the composite PEEK inlays.
• Freedom to orient the cup position according to the natural acetabulum.

Safe

• Titanium alloy used for the stems, cups, and screws is highly biocompatible and reduces the risk of infection and thus implant loosening.
• VERILOX® advanced ceramic heads are made of Zirconia Toughened Alumina, a material extensively used in human orthopedics and known for its extreme hardness, toughness, and biocompatibility.

Mini THR

The Mini THR System includes all Zurich Cementless THR parts which are compatible with stem sizes 3mm – 6mm.
It allows the treatment of cats and toy/mini breed dogs with bodyweight ranging from 2kg-15kg.

The technology for the mini THR system is identical to the standard sizes:

• Immediate fixation is achieved through locking screw technology
• Resistance to wear is achieved by optimal material selection and proprietary design.
• Modular system to combine different sizes of stems, necks, heads, and cups to fit your patient perfectly.

Due to the size of these implants, we recommend this procedure primarily to advanced THR surgeons. To learn more about prerequisites visit the THR education pathway and program.

Dual Mobility Cup

Technical Specification

While there may be other THR solutions for veterinary available on the market that state they are compatible with KYON, the successful outcomes of mixing implant solutions from multiple brands has not been evaluated long-term or in clinical settings and is not recommended. We recommend you use a total solution from KYON.

Are you looking for sizes, item numbers or required instruments or screws? Please download our catalog.

CATALOG

Courses

KYON offers veterinary THR and PHR courses ranging from introduction to mastery level.

Available THR and PHR Courses

Publications

Alvarez-Sanchez A¹, Amsellen P², Vezzoni L², Vezzoni A².
Zürich cementless total hip arthroplasty as a treatment option for capital physeal fractures in dogs: Outcome in 53 cases

Veterinary Surgery. 2021; 1–11. doi: 10.1111/vsu.13605
¹ University of Prince Edward Island, Atlantic Veterinary College, Charlottetown, Canada
² University of Minnesota, College of Veterinary Medicine, St Paul, MN

Lanz OI¹, Forzisi I², Vezzoni A²
Zurich Cementless Dual Mobility Cup for Canine Total Hip Prosthesis: Implant Characteristics and Surgical Outcome in 105 Cases