Is There A Relationship Between Chewing Side Preference and Brain Laterality in Bruxers and Non-Bruxers?
Abstract
Objective: There is no consensus on the etiology of unilateral mastication. While some studies argue that environmental factors such as missing teeth, teeth with restoration, pain, dental caries and temporomandibular disorder affect chewing side preference, others claim that brain laterality associated with hand, foot, ear and eye preferences also influences a chewing side preference. The aim of this study was to evaluate the relationship between the direction of unilateral chewing preference and brain laterality in fully dentate bruxers and non-bruxers (fully dentate or with missing and/or restored teeth).
Methods: Brain laterality of the subjects (n=132) was determined based on responses to questions about extremity and sensory preferences. The reliable visual analogue scale (VAS), Kazazoglu’s method and the sunflower seed shell cracking test were used to determine chewing side preference (CSP).
Results: CSP as determined by VAS was not associated with brain laterality. While extremity and sensory preferences were predominantly right-sided (dominant left hemisphere) in all groups, the frequency of the left-side chewing was found to be high only among bruxers (p>0.05). No significant association was found between the results of VAS and other techniques (p>0.05).
Conclusion: The left-side CSP is observed more commonly in bruxers, suggesting that different central and peripheral mechanisms may be involved in bruxers.
Keywords
References
- Beaton AA, Hugdahl K, Ray P. Lateral asymmetries and interhemispheric transfer in aging: a review and some new data. Side bias: A neuropsychological perspective. 2000:101-52.
- Teasell R, Hussein N. Clinical consequences of stroke. Evidence-based review of stroke rehabilitation, 2018. pp. 1–29.
- Lee S-M, Oh S, Yu SJ, Lee K-M, Son S-A, Kwon YH, et al. Association between brain lateralization and mixing ability of chewing side. J Dent Sci. 2017;12(2):133-8.
- Peyron MA, Woda A, Bourdiol P, Hennequin M. Age-related changes in mastication. J Oral Rehabil. 2017;44(4):299–312.
- Rovira‐Lastra B, Flores‐Orozco EI, Ayuso‐Montero R, Peraire M, Martinez‐Gomis J. Peripheral, functional and postural asymmetries related to the preferred chewing side in adults with natural dentition. J Oral Rehabil. 2016;43(4):279-85.
- Diernberger S, Bernhardt O, Schwahn C, Kordass B. Self-reported chewing side preference and its associations with occlusal, temporomandibular and prosthodontic factors: results from the population-based Study of Health in Pomerania (SHIP-0). J Oral Rehabil 2008; 35(8): 613-20.
- Haralur SB, Majeed MI, Chaturvedi S, et al. Association between preferred chewing side and dynamic occlusal parameters. J Int Med Res 2019; 47(5): 1908-15.
- Pond LH, Barghi N and Barnwell GM. Occlusion and chewing side preference. J Prosthet Dent 1986; 55(4): 498-500.
- Santana-Mora U, López-Cedrún J, Mora MJ, Otero XL, Santana-Penín U. Temporomandibular disorders: the habitual chewing side syndrome. PloS one. 2013;8(4):e59980.
- Nissan J, Gross MD, Shifman A, Tzadok L,Assif D. Chewing side preference as a type of hemispheric laterality. J Oral Rehabil 2004; 31(5): 412-6.