Face-bow record without a third point of reference: theoretical considerations and an alternative technique.

Accurate mounting of dental casts is achieved by transferring the tridimensional spatial relationship of the maxillary arch to an articulator. A face-bow is used to transfer this relationship to the articulator, usually by relating the face-bow to a plane of reference. The most common reference plane is the Frankfort plane, which has been assumed to be horizontal when the patient is in the natural head position. The axis-orbitale plane has also been considered horizontal and used as reference. However, it has been shown that both planes are not horizontal, and mounting a maxillary cast according to these planes can result in an inaccurate mounting. This article describes an alternative procedure for face-bow transfer without a plane of reference, and uses the angular relationship between the occlusal plane and the condylar path to mount the maxillary cast on the articulator. The elimination of a reference plane, to which relate the functional determinants of occlusion, avoids an additional source of error during the mounting procedure.

[1]  Arne G. Lauritzen,et al.  Hinge axis location on an experimental basis , 1961 .

[2]  U. Posselt,et al.  Relationship of various skull reference lines , 1961 .

[3]  Victor O. Lucia.  Modern Gnathological Concepts: Updated , 1983 .

[4]  C. Moorrees,et al.  Natural head position and natural head orientation: basic considerations in cephalometric analysis and research. , 1995, European journal of orthodontics.

[5]  Ulf Posselt,et al.  Hinge axis registration: Experiments on the articulator , 1958 .

[6]  E Ellis,et al.  Accuracy of face-bow transfer: effect on surgical prediction and postsurgical result. , 1992, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[7]  Juan B. Gonzalez,et al.  Evaluation of planes of reference for orienting maxillary casts on articulators , 1968 .

[8]  F. W. Craddock,et al.  The accuracy and practical value of records of condyle path inclination. , 1949, Journal of the American Dental Association.

[9]  A. F. Freitas.  A comparison of the radiographic and prosthetic measurement of the sagittal path movement of the mandibular condyle , 1970 .

[10]  Thure Brandrup-Wognsen,et al.  The face-bow, its significance and application , 1953 .

[11]  B. B. McCollum,et al.  The mandibular hinge axis and a method of locating it , 1960 .

[12]  J. O. Bailey,et al.  Evaluation of the third point of reference for mounting maxillary casts on the Hanau articulator. , 1984, The Journal of prosthetic dentistry.

[13]  P. Whitfield,et al.  The reproducibility of the natural head position in lateral cephalometric radiographs. , 1986, The British journal of oral & maxillofacial surgery.

[14]  E. B. Owen.  The condyle path, its limited value in occlusion. , 1948, Journal of the American Dental Association.

[15]  P. Nummikoski,et al.  Geometric analysis of occlusal plane orientation using simulated ear-rod facebow transfer. , 1996, Journal of prosthodontics : official journal of the American College of Prosthodontists.

[16]  E. Pound.  Let /S/ be your guide. , 1977, The Journal of prosthetic dentistry.

[17]  B Solow,et al.  Natural head position in standing subjects. , 1971, Acta odontologica Scandinavica.

[18]  I. Kenneth Aidsman,et al.  Glossary of prosthodontic terms. , 1977, The Journal of prosthetic dentistry.

[19]  Coenraad F. A. Moorrees,et al.  Natural head position, a basic consideration in the interpretation of cephalometric radiographs , 1958 .

[20]  R. L. Hanau.  Articulation Defined, Analyzed and Formulated , 1926 .

[21]  J H Pitchford,et al.  A reevaluation of the axis-orbital plane and the use of orbitale in a facebow transfer record. , 1991, The Journal of prosthetic dentistry.

[22]  R. Schneider,et al.  A plane of orientation with an extracranial anterior point of reference. , 1986, The Journal of prosthetic dentistry.

[23]  D. Curtis.  A comparison of protrusive interocclusal records to pantographic tracings. , 1989, The Journal of prosthetic dentistry.

[24]  F Lundström,et al.  Natural head position as a basis for cephalometric analysis. , 1992, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[25]  Rolf Bjehin.  A Comparison Between the Frankfort Horizontal and the Sella Turcica -Nasion as Reference Planes in Cephalometric Analysis , 1957 .

[26]  R. Clark,et al.  Reproducibility of natural head position. , 1991, Journal of dentistry.

[27]  Lawrence A. Weinberg,et al.  An evaluation of the face-bow mounting , 1961 .

[28]  B. Solow,et al.  Intra- and interexaminer variability in head posture recorded by dental auxiliaries. , 1982, American journal of orthodontics.

[29]  Alexander R. Halperin,et al.  Mastering the Art of Complete Dentures , 1988 .