Reason for the chronic recurrent subluxation or luxation:: (A) Laxity of joint capsule., (B) Eroded articular eminence., (C) Trauma to the joint., (D) All of the above.
Answer is D. 1) Laxity of Joint capsule 
 condyle will move without Restriction.
2) Shollow | Flat | eroded Articular eminence (Height↓)
Condyle – jump – eminence
3) Trauma to the Joint
Integrity of ligament – ruptured.