Clinical trial NCT01286363: Facial Patterns and Masticatory Symmetries
Official title: Preferred Chewing Side, Symmetry of Bite Force and Occlusal Contact Area of Subjects With Different Craniofacial Vertical Dimensions
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Facies
Keywords: Bite force
Dental occlusion
Face
Mastication
Morphology
Lead sponsor: University of Campinas, Brazil
Sponsor class: OTHER
Collaborators: name: Conselho Nacional de Desenvolvimento Científico e Tecnológico
First posted: 2011-01-31
Enrollment: 86
Sex: ALL
Minimum age (years): 18
Maximum age (years): 32
Standard ages: ADULT
Accepts healthy volunteers: yes
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Students and staff of Piracicaba Dental School, and individuals seeking for dental treatment at the same institution

Brief summary: 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

Detailed description: 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.

Eligibility criteria: Inclusion Criteria:

* Full dentition, good general and oral health

Exclusion Criteria:

* Facial deformities
* Severe malocclusion
* History of signs and symptoms of temporomandibular disorder
* History of parafunctions
* History of maxillofacial surgery or jaw injuries and orthodontic treatment concluded in the last 2 years

Primary outcomes:
measure: Masticatory movements during mastication
timeFrame: 2 hours
Secondary outcomes:
measure: Bite force and occlusal contact area
timeFrame: 2 hours
Other outcomes:
Locations:
city: Piracicaba
country: Brazil
facility: Piracicaba Dental School
state: São Paulo
Study officials:
affiliation: Universidade Federal de Pernambuco
name: Simone G Farias Gomes, PhD
role: PRINCIPAL_INVESTIGATOR
affiliation: Piracicaba Denal School, State University of Campinas
name: William Custodio, MS
role: STUDY_CHAIR
affiliation: Federal University of Pelotas
name: Fernanda Faot, PhD
role: STUDY_CHAIR
affiliation: Piracicaba Dental School, State University of Campinas
name: Altair A Del Bel Cury, PhD
role: STUDY_DIRECTOR
affiliation: Piracicaba Dental School, State University of Campinas
name: Renata CM Rodrigues Garcia, PhD
role: STUDY_DIRECTOR
References:
citation: 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.
citation: 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.
citation: 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.
citation: 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.
citation: 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.