An accurate determination, recording and transfer of jaw relation records from patients to the articulator is essential for the dental restoration function, facial appearance and maintenance of patient’s oral health. As unsatisfactory maxilla-mandibular relationship will eventually lead to failure of complete dentures and necessitate time consuming and costly repairs. Facebow plays an integral part of this maxilla-mandibular relationship transfer from the patient mouth to that of the articulator. Thus, this article attempts to discuss the facebow and its significance in dental restoration treatment. Maxilla is a part of the cranium and is a fixed entity. When the teeth of both jaws come in contact, maxilla becomes related to the mandible so that entire craniomaxillary complex is articulated with a moving bone, which is the mandible. The opening movement to bring the jaw from occlusal to rest position is almost a pure hinge movement. Here the mandible moves on an arc of a circle with a definite radius from the temporomandibular joint. This path of the condyle is determined by the curvature of the condylar head and the curvature of glenoid fossa. Since the radius is not constant for all the patients, it has to be determined for every individual patient, i.e., the relation of maxilla to the opening and closing axis has to be determined. The upper jaw in the human skull is positioned uniquely to the lower jaw. This position is different for every person., Also , the anatomy of maxilla and the temporomandibular joint varies from persons to persons. Thus, recording of the orientation jaw relationship is very important which is done with the help of facebow record. Certain terminologies (according To GPT-8) are important to know the importance of facebow. Hinge axis defined as an imaginary line passing through the two mandibular condyles around which the mandible rotates without translatory movement. Gnathological society defines it as imaginary line connecting the center of one condyle to the center of rotation of the other Like centric relation ,hinge axis is Stable ,Learnable, Recordable, Reproducible and Repeatable. Terminal hinge axis defined as when the condyles are in their most superior position in the articular fossa and the mouth is purely rotated open, the axis around which movement occurs is called as Terminal hinge axis.Clinical Use Of Terminal Hinge Axis is firstly is the location of the transverse hinge axis serves only to orientate the maxilla and to record the static starting point for functional mandibular movements. It does not record centric relation or condylar movements. Secondly it ,allows the transfer of the opening axis of jaws to the articulator so that occlusion would be on the same arc of closure as in the patients mouth. Therefore it is used as an important reference in mounting casts in the articulator, so that the opening axis of the articulator coincides with the terminal hinge axis of the patient. And this axis can be located when the mandible is in its most posterior unstrained position by means of a Face bow. I. Face Bow The face bow is a caliper like device that is used to record the relationship of the jaws to the temporomandibular joints or the opening axis of the jaws and to orient the casts in the same relationship to the opening axis of the articulator.The term, “face bow,” probably evolved from a statement by A.D. Grit man, who described the “implement devised by Prof. Snow. as a bow of metal (that) reaches around the face. Face bow record is used in balanced occlusion in complete denture, in edentulous Class I & II cases, Open anterior bite or end to end relationship, Single restoration on II molar not for premolar and I molar, Segmental restoration, Anterior restoration and restoration of entire quadrant Significance of Facebow for Dental Restorations www.iosrjournals.org 2 | Page II. Parts Of Face Bow It is constructed in 3 bars, 1 anterior, 2 lateral. TABLE-1 PARTS OF FACEBOW