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| Name | Class |
|---|---|
| Conselho Nacional de Desenvolvimento Científico e Tecnológico | OTHER_GOV |
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The purpose of this study is to evaluate chewing side preference, and lateral asymmetry of occlusal contact area and bite force of individuals with different craniofacial patterns
Dolichofacial subjects presents poorer mechanical advantage, less efficiency in masticatory muscles during mastication and in generating bite force, smaller occlusal contact area and masticatory capacity when compared to brachyfacial individuals.
Wide, bilateral chewing cycles were related to better masticatory performance, however, unilateral chewing was reported to be very common in population, and it has been associated to lateral asymmetry on bite force and occlusal contact area.
It has been reported that dolichofacial subjects need greater muscular effort during mastication when compared to meso and brachyfacial subjects. This may cause functional overloading of weaker masticatory muscles, and may lead to functional asymmetries.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Brachyfacial | Subjects with a horizontal facial growth pattern | ||
| Mesofacial | Subjects with a balanced facial growth pattern | ||
| Dolichofacial | Subjects with a vertical facial growth pattern |
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| Measure | Description | Time Frame |
|---|---|---|
| Masticatory movements during mastication | A jaw tracking device was positioned on subjects face, who were asked to chew an artificial material in their habitual way. Tracings of jaw lateral movements during mastication were analyzed to classify in which side each chewing stroke was taken. If 80 percent or more chewing cycles were classified as left or right, the subjects were considered as unilateral chewer. | 2 hours |
| Measure | Description | Time Frame |
|---|---|---|
| Bite force and occlusal contact area | A strain gauge was positioned on subject's first molar region unilaterally to measure the symmetry of bite force. The individual was asked to bite as hard as possible. The procedure was repeated to the other side, and the bite symmetry of sides was analyzed. To evaluate symmetry of occlusal contact area, a registration of posterior teeth was performed with the subjects in maximal intercuspal position. The registration was digitalized, discolored, color inverted and adjusted for size to evaluate thickness of registration material using a software. |
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Inclusion Criteria:
Exclusion Criteria:
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Students and staff of Piracicaba Dental School, and individuals seeking for dental treatment at the same institution
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| Name | Affiliation | Role |
|---|---|---|
| Simone G Farias Gomes, PhD | Universidade Federal de Pernambuco | Principal Investigator |
| William Custodio, MS | Piracicaba Denal School, State University of Campinas | Study Chair |
| Fernanda Faot, PhD | Federal University of Pelotas | Study Chair |
| Altair A Del Bel Cury, PhD | Piracicaba Dental School, State University of Campinas | Study Director |
| Renata CM Rodrigues Garcia, PhD | Piracicaba Dental School, State University of Campinas | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Piracicaba Dental School | Piracicaba | São Paulo | 13414-903 | Brazil |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 20726943 | Background | Gomes SG, Custodio W, Faot F, Del Bel Cury AA, Garcia RC. Masticatory features, EMG activity and muscle effort of subjects with different facial patterns. J Oral Rehabil. 2010 Nov;37(11):813-9. doi: 10.1111/j.1365-2842.2010.02075.x. Epub 2010 Aug 19. | |
| 18947820 | Background | Martinez-Gomis J, Lujan-Climent M, Palau S, Bizar J, Salsench J, Peraire M. Relationship between chewing side preference and handedness and lateral asymmetry of peripheral factors. Arch Oral Biol. 2009 Feb;54(2):101-7. doi: 10.1016/j.archoralbio.2008.09.006. Epub 2008 Oct 22. |
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| ID | Term |
|---|---|
| D019066 | Facies |
| D001733 | Bites and Stings |
| ID | Term |
|---|---|
| D020969 | Disease Attributes |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D011041 | Poisoning |
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| 2 hours |
| 12831216 | Background | Garcia-Morales P, Buschang PH, Throckmorton GS, English JD. Maximum bite force, muscle efficiency and mechanical advantage in children with vertical growth patterns. Eur J Orthod. 2003 Jun;25(3):265-72. doi: 10.1093/ejo/25.3.265. |
| 11398555 | Background | Sonnesen L, Bakke M, Solow B. Temporomandibular disorders in relation to craniofacial dimensions, head posture and bite force in children selected for orthodontic treatment. Eur J Orthod. 2001 Apr;23(2):179-92. doi: 10.1093/ejo/23.2.179. |
| 22031059 | Derived | Gomes SG, Custodio W, Faot F, Cury AA, Garcia RC. Chewing side, bite force symmetry, and occlusal contact area of subjects with different facial vertical patterns. Braz Oral Res. 2011 Sep-Oct;25(5):446-52. doi: 10.1590/s1806-83242011005000014. |
| D064419 | Chemically-Induced Disorders |
| D014947 | Wounds and Injuries |