Journal of Scientific Dentistry

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VOLUME 9 , ISSUE 1 ( January-June, 2019 ) > List of Articles

REVIEW ARTICLE

Posterior Reference Points: A Simplified Classification

Mahadevan Ravichandran, Manoj K Sundar, Venkatakrishnan Kamakshi

Keywords : Accuracy, Arbitrary hinge axis, External auditory meatus, Reference points, Tragus

Citation Information : Ravichandran M, Sundar MK, Kamakshi V. Posterior Reference Points: A Simplified Classification. 2019; 9 (1):9-12.

DOI: 10.5005/jp-journals-10083-0913

License: CC BY-NC 4.0

Published Online: 01-12-2019

Copyright Statement:  Copyright © 2019; The Author(s).


Abstract

Aim: The aim of this review is to summarize the pertinent literature concerning the most appropriate posterior reference point(s) to locate the hinge axis and to arrive at a classification system. Background: Numerous theories are proposed on the occurrence and the need to trace hinge axis, especially in prosthodontics, to restore lost natural teeth. There is no classification system that exists in relation to posterior reference points. Review results: Many authors have come up with various theories to locate the arbitrary hinge axis. The perplexing part in remembering these posterior reference points are eliminated by arriving at a classification system. Conclusion: Depending upon the anatomical landmark and the accuracy to the true hinge axis, a classification was formulated for ease of understanding and learning purpose. Clinical significance: Achieving a stable restoration requires the transfer of hinge axis as close to the true axis as possible. To enable this, knowledge about the posterior reference points becomes mandatory. Since there are multiple posterior reference points, a classification system would help ease in remembering them.


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  1. Palik JF, Nelson DR, White JT. Accuracy of an earpiece face-bow. J Prosthet Dent 1985;53(6):800–804. DOI: 10.1016/0022-3913(85) 90160-X.
  2. Beard CC, Clayton JA. Studies on the validity of the terminal hinge axis. J Prosthet Dent 1981;46(2):185–191. DOI: 10.1016/0022-3913(81)90307-3.
  3. Aull AE. A study of the transverse axis. J Prosthet Dent 1963;13(3): 469–479. DOI: 10.1016/0022-3913(63)90102-1.
  4. Shanahan TEJ, Leff A. Mandibular and articulator movements, part III: the mandibular axis dilemma. J Prosthet Dent 1962;12(2):292–297. DOI: 10.1016/0022-3913(62)90064-1.
  5. Schalhorn RG. A study of the arbitrary center and kinematic center of rotation for facebow mounting. J Prosthet Dent 1957;7(2):162–169. DOI: 10.1016/0022-3913(57)90072-0.
  6. Ellis 3rd E, Tharanon W, Gambrell K. Accuracy of face-bow transfer: effect on surgical prediction and postsurgical result. J Oral Maxillofac Surg 1992;50(6):562–567. DOI: 10.1016/0278-2391(92)90434-2.
  7. Raghav D, Kapoor K, Alqahtani AA, Kola MZ, Alqahtani F. Intricate relations and concepts of reference points in prosthodontics: a literature review. Eur J Prosthodont 2016;4:1–6. DOI: 10.4103/2347-4610.182959.
  8. Gates GN, Nicholls JI. Evaluation of mandibular arch width changes. J Prosthet Dent 1981;46(4):385–392. DOI: 10.1016/0022-3913(81)90443-1.
  9. Simpson JW, Hesby RA, Pfeifer DL, Pelleu GB. Arbitrary mandibular hinge axis locations. J Prosthet Dent 1984;51(6):819–822. DOI: 10.1016/0022-3913(84)90383-4.
  10. Lauritzen AG, Bodner GH. Variations in location of arbitrary and true hinge axis points. J Prosthet Dent 1961;11(2):224–229. DOI: 10.1016/0022-3913(61)90196-2.
  11. Nooji D, Sajjan SM. The third point of reference and its effect on the protrusive condylar guidance angles obtained in semi-adjustable articulator. J Indian Prosthodont Soc 2008;8(2):71–77. DOI: 10.4103/0972-4052.43589.
  12. Gordon SR, Stoffer WM, Connor SA. Location of the terminal hinge axis and its effect on the second molar cusp position. J Prosthet Dent 1984;52(1):99–105. DOI: 10.1016/0022-3913(84)90190-2.
  13. Abdullah MA, Sherfuddin F. A comparative study of facebow transfer on hanau and whip-mix articulators. Saudi Dent J 1994;6(1): 8–12.
  14. Preston JD. A reassessment of the mandibular transverse horizontal axis theory. J Prosthet Dent 1979;41(6):605–613. DOI: 10.1016/0022-3913(79)90054-4.
  15. Granger ER. Clinical significance of the hinge axis mounting. DCNA 1959; 205–213.
  16. Walker PM. Discrepancies between arbitrary and true hinge axis. J Prosthet Dent 1980;43(3):279–285. DOI: 10.1016/0022-3913(80)90402-3.
  17. Clark JR, Hutchinson I, Sandy JR. Functional Occlusion: II. The role of articulators in orthodontics. J Orthod 2001;28(2):173–177. DOI: 10.1093/ortho/28.2.173.
  18. Solow B, Tallgren A. Natural head position in standing subjects. Acta Odontol Scand 1971;29(5):591–607. DOI: 10.3109/00016357109026337.
  19. Nandeeshwar DB, Kumar SA, Acharya S. A cephalometric study to determine the relation of ala-tragus line with different posterior reference points from a standard occlusal plane in completely edentulous patients. Asian J Med Clin Sci 2012;1:111–115.
  20. Brandrup-Wongsen T. The face-bow, its significance and application. J Prosthet Dent 1953;3(6):18–30.
  21. Page HL. Some confusing concepts in articulation. D Digest 1958;64:71–76.
  22. Kumar P, Kumar A, Goel R, Khattar A. Anterior point of reference: current knowledge and perspectives in prosthodontics. J Orofac Sci 2012;4(2):96–99. DOI: 10.4103/0975-8844.106195.
  23. Yatabe M, Zwijnenburg A, Megens CCEJ, Naeije M. The kinematic center: a reference for condylar movements. J Dent Res 1995;74(10):1644–1648. DOI: 10.1177/00220345950740100401.
  24. Olsson A, Posselt U. Relationship of various skull reference lines. J Prosthet Dent 1961;11(6):1045–1049. DOI: 10.1016/0022-3913(61)90041-5.
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