- Symptomatic rhizarthrosis (primary and secondary)
- Rheumatoid arthritis
- Treatment goals:
- Pain relief
- Preservation of strength
- Maximum mobilization with full circumduction
- Opposition while maintaining thumb length
Finger endoprosthetics
CARPOFIT®
Thumb saddle joint
The CARPOFIT® thumb saddle joint prosthesis was developed in collaboration with Prof. Dr. Uwe Joosten (Marien hospital Osnabrück).
The implant is used for cementless trapeziometacarpal joint replacement in cases of rhizarthosis or rheumatoid arthritis. The modular design and small diameter of the Pressfit cup results in a bone-saving restoration that can be adapted to the patient's anatomy.
10-Year Results
A study with 292 patients shows: 95% survival rate after 10 years, significant improvement in pain and function within the first 3 months. 91% of patients were satisfied or very satisfied after 10 years—a clear testament to the quality and reliability of the CARPOFIT® prosthesis!
doi:10.1177/17531934241265811
Indications
Key Features
- PEEK-C:
- No metal-on-metal contact
- Avoidance of thin-walled polyethylene components
- Conical cup design:
- Bone-sparing
- Excellent press-fit
- High primary stability
- Large head design:
- Low dislocation risk
- Increased range of motion (ROM 117°/118°)
Materials
- Anchoring stems: implatan® TiAl₆V₄ (ISO 5832-3)
- Neck components (and conical cups): implavit® CoCrMo (ISO 5832-12)
- Pressfit cups: PEEK-C (polyetheretherketone with carbon matrix for reinforcement)
Coatings
- Anchoring stems: TCP coating on the bone side
- Joint components: TiNbN coating
- Pressfit cup (PEEK-C): implaFix® cpTi coating on the bone side
- Conical cup (cementless):
- implaFix® cpTi and TCP coatings on the bone side
- Optional: TiNbN coating on the articulating surface
Product Range
- Anchoring stems available in four sizes: 5, 6, 7, and 8 mm
- Joint components in four neck lengths
- Cups:
- Pressfit cup made of PEEK-C
- (Conical, cementless cup made of CoCrMo)*
HAPTIC®
Interphalangeal joint
The HAPTIC® system was developed in collaboration with Prof. Dr. Uwe Joosten (Marienhospital Osnabrück) and Dr. med. univ. Armin Zadra (state hospital Bad Radkersburg).
The implant is used for uncoupled cementless treatment of the proximal interphalangeal finger joint using a novel combination of materials. The wide range of sizes and the minimal resection required allow the collateral ligaments to be preserved. The stem-guided design ensures good bone anchorage.
Indications
- Degenerative joint diseases such as osteoarthritis and avascular necrosis
- Post-traumatic osteoarthritis and joint destruction of the finger MCP or PIP joints
- Rheumatoid arthritis with low inflammatory activity and good bone quality
- Painful, destroyed proximal interphalangeal joints
- Advanced idiopathic osteoarthritis
- Fractures unsuitable for treatment with other surgical techniques
- Treatment Goals:
- Pain relief
- Restoration of function
- Preservation of joint stability and mobility
Key Features
- Cementless anchoring
- Anatomical shape:
- Shaft-based anchoring: simplified alignment and secure fixation
- Symmetrical bicondylar contour
- Highly congruent articulation
- Innovative material combination
Materials
- Proximal component: implatan® TiAl₆V₄ (ISO 5832-3)
- Distal component: PEEK-C (polyetheretherketone with carbon matrix for reinforcement)
Coatings
- Proximal component:
- implaFix® cpTi coating on the bone side
- TiN coating on the articulating surface
- Distal component:
- implaFix® cpTi and TCP coatings on the bone side
- implaFix® cpTi and TCP coatings on the bone side
Product Range
The HAPTic® PIP prosthesis is available in 5 sizes
This area is intended for medical professionals only and may only be provided to certain professional personnel.