Stryker’s Trident® Ceramic Hip Replacement System
In 1999, Stryker advanced the design of hip implants with the ceramic-on-ceramic and titanium hip, representing the latest innovations in this technology with the Trident® hip replacement system. Unlike conventional hip replacement systems, the Trident® System utilizes alumina ceramic-on-ceramic surfaces rather than metal-on-plastic or metal-on-metal. Ceramic-on-ceramic components have demonstrated significantly lower wear versus the conventional systems in the laboratory. Therefore, it is anticipated that these improved wear characteristics will potentially extend the life of the implant.
The Trident® Ceramic System is a cementless system, which means that the materials are fixed to the bone through implant design and technique, rather than using bone cement. Additional technology such as arc deposition and hydroxyapatite (HA) coating are an essential part of the shell design.
- Arc deposition is a titanium metal-coating process which is applied to the outer surface of the Trident® acetabular shell. It provides a roughened, textured surface on the acetabular shell, which helps provide initial fixation of the implant onto the bone.
- Hydroxyapatite (HA) is a naturally occurring substance that closely resembles natural bone mineral. Bone mineral stores the body’s supply of calcium and phosphorous — two minerals critical to one’s health. In fact, the two major components of HA are calcium and phosphorus — the predominant components of bone and tooth enamel. It’s no wonder that the material is so biocompatible and has enjoyed great success in orthopaedic and dental applications for over two decades.
Advantages of Stryker’s Trident® Ceramic System:
- Potential to wear less, last longer. The insert and head of the Trident® System are both alumina ceramic, which has demonstrated significantly lower wear versus conventional plastic-on-metal joint systems in the laboratory. It is anticipated that the improved wear characteristics of alumina ceramic may result in a longer lasting implant.1
- It’s stronger than other ceramic hip systems on the market. The Trident® Ceramic System has a unique design that features a patented titanium sleeve surrounding the ceramic acetabular shell. The titanium sleeve increases the material strength of the ceramic insert by 50% versus other available ceramic inserts.2
- Biocompatible. The type of ceramic used in total hip replacement today is aluminum oxide, also known as alumina. Alumina ceramic is extremely compatible with the body.
Range of motion for the Trident® Ceramic System
Many people are concerned that they’ll experience a more limited range of motion following total hip replacement. Most want to regain sufficient motion so that they can return to everyday activities, such as climbing stairs and sitting or bending to tie their shoelaces, without concern for dislocation. Although there are many factors that will influence your range of motion, the Trident® Ceramic System is designed to accommodate the range of motion of a normal, healthy hip joint. An increased range of motion may minimize the risk of hip dislocation.
Stryker Corporation or its divisions or other corporate affiliated entities own, use or have applied for the following trademarks or service marks: Stryker and Trident. All other trademarks are trademarks of their respective owners or holders.
1. Taylor SK, Serekian P, Manley M. “Wear Performance of a Contemporary Alumina: Alumina Bearing Couple Under Hip Joint Simulation.” Trans. 44th Ann. Mtg. ORS, 51, 1998.
2. Stryker Test Report MT0014.