Hie.. ideally, scaling doesnt lead to fracturing the tooth .. may be there had been already a trauma to the tooth which gets exaggerated with scaling ..
need to evaluate clinically how much part of your inner tooth is fractured if it is so.. if it’s painless, then might but only filling will work.. or else root canal.. if in an X-ray,it seems the fracture line is extending till the roots, need to get it removed
Next Steps
Kindly visit dentist for an X-ray first