Hinge Axis and Face Bow

Establishing maxillo-mandibular relationships in partially or completely edentulous individuals has engaged the attention of prosthodontists ever since the profession began to understand and interpret the various dynamic and static positions of the condyles in the glenoid fossa. Two types of movements are known to occur in the TMJ, a hinge like movement taking place between the condyle and the articular disc and a translatory motion between the articular disc and the roof of the glenoid fossa. The hinge axis concept still controversial inspite years of study. The various schools of thought regarding its existence and location often leads to doubt regarding its application in everyday clinical practice. Precision is the key to prosthodontics and it is thus imperative that restorations are made as accurately as possible. This is best achieved by the use of hinge axis concept and thus it should be incorporated into routine clinical practice to achieve optimum results.