An electronic measurement system using an interdigitated capacitive sensor has been developed to more accurately measure spinal fusion progress by detecting cartilage formation, allowing earlier rehabilitation. The sensor will be mounted on a spinal plate and connected to circuitry to measure its changing capacitance during plate bending. The circuitry design includes stages for capacitance measurement, analog to digital conversion, and wireless data transmission. The objective is to complete the first capacitance measurement stage. Testing of different circuits found the Low-Z Amplifier accurately measures capacitances in the picofarad range needed. Preliminary work has been done on later stages using an Arduino, with challenges including wireless transmission through body and circuit miniaturization.