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Completed

NCT Number: NCT01286363

Facial Patterns and Masticatory Symmetries

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

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Key information

Conditions

Facies Bites and Stings Chemically-Induced Disorders Disease Attributes Pathologic Processes Pathological Conditions, Signs and Symptoms Poisoning Wounds and Injuries

Age range

18 year–32 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Piracicaba Dental School

Piracicaba, São Paulo, 13414-903, Brazil

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Primary outcomes

  1. Masticatory movements during mastication

    Time frame: 2 hours

    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.

Secondary outcomes

  1. Bite force and occlusal contact area

    Time frame: 2 hours

    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.

Sponsors and collaborators

Lead sponsor

University of Campinas, Brazil

Other

Collaborators

  • Conselho Nacional de Desenvolvimento Científico e Tecnológico

Registry information

Official study title

Preferred Chewing Side, Symmetry of Bite Force and Occlusal Contact Area of Subjects With Different Craniofacial Vertical Dimensions

Important dates

Study start
2006
Primary completion
2007
Study completion
2008
First posted
Jan 31, 2011
Registry last updated
Jan 31, 2011

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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