Description Ball Joint Block for MPR TKA Ball Joint System that, when combined with the MPR exclusive Universal Ball Joint Boot (MPR-BJBT), allows you to tilt, rotate, flex and extend the knee into infinite positions. Ball Joint Block and Ball Joint Boot can easily retrofit your existing Alvarado system. Block is compatible with slotted hooks of standard Alvarado base plates. Complete MPR TKA Positioner System with Ball Joint Block (1320-003) also available. Made in USA. Trials available.
