Hintermann Series H2®
Total Ankle Replacement Prosthesis
(Available for use in markets outside the US)
The Hintermann Series H2® Total Ankle Replacement prosthesis (Hintermann Series H2®) is a semi-constrained, total ankle replacement system consisting of a talar component, tibial assembly component, and a PE inlay assembly component. Professor Beat Hintermann developed the Hintermann Series H2® based on his more than 18 years of experience implanting his successful H3 ankle. Prof. Hintermann saw a need to develop a semi-constrained implant designed to address ankle instability and provide reproducible clinical results for the foot and ankle surgeon. After implantation, the Hintermann Series H2® is constrained in a patient-specific optimized position to further support the surrounding tissues, providing stability against translational and rotational forces of the normal ankle joint. This device utilizes the identical surgical preparation and approach as the Hintermann Series H3™, including the instrumentation.
The Hintermann Series H2® talar component is anatomically shaped (conical surface) and is designed to allow for physiological talar motion through eversion with dorsiflexion and to minimize medial ligament stress. The medial and lateral rims help to guide movement of the PE assembly and the anterior pegs help improve sagittal stability and positioning. Two holes are provided in the shield for optional screw fixation.
The Hintermann Series H2® tibial assembly includes a tibial slide and tray. This piece has a low profile anterior shield which is intended to provide rotational stability of the component and to prevent scarring and bone formation that may hinder joint motion. The superior peaks are designed to provide anchoring in the subchondral bone to increase stability in translation and rotation. The tibial slide is inserted into the tibial tray to fix the anterior/posterior/neutral position of the poly inlay, while still allowing internal/external rotation until the surgeon has determined the proper final alignment of the reconstructed ankle. Once the proper alignment is found, the locking screw must be tightened to fix the rotational aspect of the implant. Two holes are provided in the implant for optional screw fixation.
The PE inlay assembly is composed primarily of ultra-high molecular weight polyethylene (UHMWPE) and consists of four sub-components which come pre-assembled. The inlay is designed to be inserted into the tibial assembly from the anterior side and is available in three offsets (anterior, posterior, and neutral) to allow the surgeon to correctly reconstruct the ankle and ensure proper alignment between the tibia and talus.
Primary and Revision Surgery
The Hintermann Series H2® Total Ankle Replacement System is indicated in primary surgery as a non-cemented implant to replace a painful ankle damaged by systemic arthritis of the ankle (e.g., rheumatoid arthritis), primary arthritis (e.g., degenerative disease), and secondary osteoarthritis (e.g., post-traumatic, infection, and avascular necrosis with 2/3 of the talus minimally preserved).
When revision surgery is indicated, and if bone stock is sufficient, the Hintermann Series H2® can be used to salvage failed ankle replacements or non-union and mal-union of ankle arthrodesis.
Key Features & Benefits
- Anatomic design of components
- Complete offering of sizes, each available in right or left orientation
- Size matched UHMWPE inlay assembly in 4 different thicknesses and anterior/posterior/neutral offsets
- Designed to provide optimal contact area at all bone-implant interfaces
- Intended to offer anatomic loading (non-stress shielding) at both bone-implant interfaces
- Tibial and talar components are designed with a porous Titanium and Hydroxyapatite (HAP) double coating, and intended for non-cemented use
- Tibial Implant Component:
- Sizes 2 – 6 in right or left orientation
- Talar Implant Component:
- Sizes 1 – 6 in right or left orientation
- PE Inlay:
Sizes 1-6 in right or left orientationFour thicknesses (5, 6, 7, and 9 mm)Three offsets (anterior, posterior, and neutral)