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Thin thread flanks and large pitches give more solid bone lamellae. Especially the combination of large thread distances with a good cutting-in leads to a large bone application in the thread base. The load transmission takes place evenly and without load concentrations on the thread flanks.
External shape
Due to the anatomical external shape of the Screw Cup SC® the subchondral bone structures remain intact. These are often destroyed in conically shaped screw sockets. The free intraoperative decision for optimal socket position is also up to the screwing of the screw cup possible, an important advantage especially in the ceramic-ceramic articulation.
Cancellous bone structure
Due to the large bottom opening a central bone defect can easily be filled with cancellous bone. This sets the stage for the formation of bone in the socket base. The opening is then closed by a lid. This is firmly connected to the threaded SC® by a clamping mechanism.
Cutting-in
Thin thread flanks and many self-tapping edges reduce the force required for cutting the thread. Thread flanks with opposite cutting angle intersect smoother and softer in the bony implant bed. Choosing this thread parameter enables an easy and safe implantation of the Screw Cup SC®.
Cutting-in depth
Once the Screw Cup SC® achieved a good implant-bone contact in the thread base, special flutes grab into the bone layer. This causes a significant increase of the insertion torque. The surgeon thereby gets a tactile feedback on the final and correct screwing depth.
Modular cup inserts
The conical anchoring principle of the Screw Cup® SC inner surface enables a safe anchoring of a ceramic Biolox® or polyethylene insert and thus prevents relative and micro-movements. The main load area is equipped with the maximum material thickness. The modular range of implants offers therefore the alternative: ceramic or polyethylene insert. The implant components can be individually adapted to the requirements of the patient.
