Type of Article : Review

Year: 2014 | Volume 2 | Issue 6 | Page No. 772-776

Date of Publication: 23-11-2014

DOI: 10.16965/ijpr.2014.696

IS MASTICATORY FORCE AT MOLAR REGION ANALOGICAL TO STAPLING MECHANICS AND BOTH BELONGING TO AN UNIDENTIFIED LEVER SYSTEM?  

R. Vinodh Rajkumar.  

Founder: PALEOLITHICX, Physiotherapist & Functional Fitness Training Instructor (Freelance), Bangalore, Karnataka, India.

Corresponding author: R. Vinodh Rajkumar, # 638, 1st Floor, Jakkuramma Building, Behind Eswara Temple, 1st Cross, 1st Main, Mathikere, Bangalore-560054, Karnataka, India. Mobile: +919008424632
E-Mail: dreamofkalam@rediffmail.com

Abstract:

For easy and clear understanding of biomechanics, the inter-relationships of simple machines and musculoskeletal functions have always been attempted and established. The masticatory biomechanics is still under research because there is wide range of findings on masticatory muscles including the lack of complete clarity on their line of actions and lever arms too. As a prospective contribution to advanced research on mastication and management of Temporomandibular joint, there are two innovative concepts discussed in this article; (1) Strong correlation between stapling mechanics and Temporomandibular joint biomechanics at molar region (2) Scope for a new unidentified lever system named as fourth class lever. The principal intent of this article is to share these two innovative concepts to be explored further for practical applications in the field of Physical therapy, Dentistry and Engineering. 
KEYWORDES: Stapling mechanics, Mastication at molar region, unidentified lever system.

References

1. Bakke M. Bite Force and Occlusion. Seminars in Orthodontics, 12:120-26, 2006.
2. A VanderBilt, A Tekamp., H Van der Glas and J Ab-bink. Bite force and electromyograpy during maximum unilateral and bilateral clenching. European Journal of Oral Sciences. 2008;116:217-222.
3. B K Biswas S Bag & S Pal. Biomechanical analysis of normal and implanted tooth using biting force measurement. International Journal of Engineering and Applied Sciences 2013;4(2) ISSN 2305-8269.
4. Hertling D, Dussault L. The Temporomandibular joint. In: Hall CM, Brody LT, eds. Therapeutic Exercise: Moving Toward Function. Philadelphia, Pa: Lippincott Williams & Wilkins; 499– 520, 1999.
5. Margaret L McNeely,Susan Armijo Olivo and David J Magee. A Systematic Review of the Effectiveness of Physical Therapy Interventions for Temporomandibular Disorders, Physical Therapy 2006;86(5):710-725.
6. Lin Wang. Biomechanical analysis in Human masticatory system. Applied mechanics and materials 2013;249-250:1294-1300.
7. Susan J Hall, Basic Biomechanics, Chapter-13, Equilibrium and Human movement, Brown & Bench mark, 1991.
8. Cynthia C Norkin and Pamela K Levangie, Joint structure and function, Chapter 1, Page-33, Jaypee Brothers, 2nd Edition).
9. John Low and Ann Reed, Basic Biomechanics explained, Chapter 5, Page-82, Butterwort Heineman, 1996.
10. Alomar X, Medrano J, Cabratosa J, Clavero J, Lorente M, Serra I, Monill J, Salvador A, Anatomy of the temporomandibular joint. Seminars in Ultrasound, CT, and MRI 2007;28:170-183.
11. L J Pereira M.B Gavião, L R Bonjardim, P M Castelo and S Andrade Ada. Ultrasonography and electromyography of masticatory muscles in a group of adolescents with signs and symptoms of TMD. Journal of Clinical Pediatric Dentistry 2006;30:314-319.
12. Hylander W. L. An experimental analysis of temporomandibular joint reaction force in macaques. American Journal of Physical Anthropology 1979;51:433-456.
13. Drake R, Vogl AW, Mitchell A, Grays Anatomy for Students, 927, 2009.
14. Mansour and Reynik. In vivo occlusal forces and moments. I. Forces measured in terminal hinge position and associated moments, J Dent Res. 1975;54(1):114-20.
15. Ju-Young Lee, Jeong-Nam Kim, Ja-Young Yoo, Kyung-Seok Hu, Hee-Jin Kim, Wu-Chul Song and Ki-Seok Koh, Topographic anatomy of the masseter muscle focusing on the tendinous digitations, Clinical Anatomy 2012;25(7):889–892.
16. Goto TK, Langenbach ER, Hannam AG. Length changes in the human masseter muscle after jaw movement. Anat Records 2001;262(3):293-300.
17. Weijs WA, Hillen B. Correlation between cross-sectional area of jaw muscles and craniofacial size and shape. American journal of physical Anthropology 1986;70:423-431.
18. Newton J P, Abel E W, Robertson E M, Yemm R. Changes in human masseter and medial pterygoid muscles with age: a study by computed tomography. Gerodontics. 1987;3:151–154.
19. E.Tanaka, J.H.Koolstra, Biomechanics of the Temporomandibular joint. J Dent Res. 2008;87(11):989-991.
20. T.M.J.J Van Eijden, S.J.J. Turkawsk. Morphology and Physiology of Masticatory Muscle Motor Units, T.M.G.J. Sage publications 2001;12:76.
21. Van Eijden TMGJ, Klok EM, Weijs WA, Koolstra JH. Mechanical capabilities of the human jaw muscles studied with a mathematical model, Arch Oral Biol. 1988;33:819-826.