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The principal preoperative planning factor is the correct diagnosis. It has to be determined
whether the bone and stability situation require the implantation of a constrained prosthesis.
The main indications for implantation of RT-PLUS™ Modular are:
•
High-grade joint destruction with considerable loss of function and requirement for addi-
tional stabilization with longer stems and reconstruction of bone defects
•
Severe joint instability that predictably cannot be corrected by suitable bone reconstruction
(bone grafts) or soft-tissue intervention
•
Marked contractures and axial displacements of more than 15°–20°
•
Failure after surface replacement (e.g., infection, loosening) – revision of a primary prosthesis
•
Trauma – induced femoral or tibial fractures
•
Due to the design, it is possible to switch with relatively little effort, even intraoperatively,
from the TC-PLUS™ knee system to the RT-PLUS™ Modular knee system, since the resections
and prosthesis sizes are matching
Contraindications
Contraindications are:
•
Acute or chronic, local or systemic infections (or in the case of a corresponding anamnesis)
•
Severe muscle, nerve or vascular diseases that endanger the affected extremity
•
Lacking bone substance or inadequate bone quality that endangers a stable seating of the
prosthesis
•
Severe adiposity
•
All concomitant diseases that may endanger the function of the implant. These include in
particular extreme insuffi ciency of the knee extensor mechanism, which can lead to exces-
sive joint distortion; or severe adiposity, which can lead to a dorsal impingement, which may
uncouple the components. In these cases it may be advisable to use a coupled hinge or a
tumour prosthesis
•
Patient hypersensitivities or allergies to the materials used
•
Strenuous physical activity (e.g., competitive sports, hard physical work)
See also instructions on the package insert.
Indications