Objective to investigate the clinical effects of tension band internal fixation of patella, partial patellectomy and modified partial patellectomy on displaced fracture of patella in the elderly.

Objective to study the therapeutic efficacy of Ni-Ti-shaped memory alloy as a new internal fixation method to treat fracture of patella.

Objective: To explore the curative effect of comminuted patella fracture by internal fixation of amend tensile band with steel wires.