Hi sir...
Yes Both are related only... hitting of your lower teeth is due to reduced overjet or excessive overbite ..
OVERJET is nothing but the horizotal relationship of upper and lower teeth...
OVERBITE is nothing but the vertical relationship of upper and lower teeth...
Next Steps
orthodontic management will definitely eliminate this problem
Health Tips
kindly visit nearby dentist for furthur consultation...If you leave this condition untreated then the clicking sound may get worsen and it may leads to permanent Temperomandibular joint problem