Kinamed - Model MD3T - Multi-Directional Tibial Tubercle Transfer System

Transferring the tibial tubercle (TT) to treat patellofemoral disorders is a time-tested and well-established surgical technique. Medial transfer has been practiced since 18881, and anterior transfer was introduced by Maquet in 19762. In 1983, Fulkerson combined these two transfers in the antero-medialization (AMZ) technique3. In addition, distal transfer to correct patella alta, and lateral transfer to reconstruct an over-medialized TT, are occasionally indicated. The Multi-Directional Tibial Tubercle Transfer (MD3T) System from Kinamed has unique advantages: it enables the surgeon to move the TT in multiple directions in a precise, predictable, and independent manner, while preserving greater cortical integrity to help reduce the risk of a tibial stress fracture. The concept of the MD3T Technique4,5 is simple:

• A compound wedge of bone containing the Tibial Tubercle and its attached Patellar Tendon is created, the “Primary Wedge.”
• For corrections that include medialization, a “Secondary Wedge” of bone is created medial to the Primary Wedge.
• The Primary and Secondary Wedges are transposed, thus transferring the Tibial Tubercle medially. The width of the Secondary Wedge determines the medial transfer distance.
• For medial transfer, fast-setting bone void filler or bone graft is used to fill the space lateral to the transposed Wedges prior to fixation.
• For antero-medial transfer, additional fast-setting bone void filler or bone graft is placed lateral and posterior to the transposed Wedges prior to fixation.
• The medial and anterior transfer distances can therefore be planned independently of one another.
• Unidirectional anterior, distal, and proximal transfers involve the repositioning of the Primary Wedge only (a Secondary Wedge is not created).