Facial Patterns and Masticatory Symmetries

January 28, 2011 updated by: University of Campinas, Brazil

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

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

Study Overview

Status

Completed

Conditions

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.

Study Type

Observational

Enrollment (Actual)

86

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Brazil
    • São Paulo
      • Piracicaba, São Paulo, Brazil, 13414-903
        • Piracicaba Dental School

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 32 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Students and staff of Piracicaba Dental School, and individuals seeking for dental treatment at the same institution

Description

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

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Time Perspectives: Cross-Sectional

Cohorts and Interventions

Group / Cohort
Brachyfacial
Subjects with a horizontal facial growth pattern
Mesofacial
Subjects with a balanced facial growth pattern
Dolichofacial
Subjects with a vertical facial growth pattern

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
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.
2 hours

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
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.
2 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Campinas, Brazil

Collaborators

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Investigators

  • Principal Investigator: Simone G Farias Gomes, PhD, Universidade Federal de Pernambuco
  • Study Chair: William Custodio, MS, Piracicaba Denal School, State University of Campinas
  • Study Chair: Fernanda Faot, PhD, Federal University of Pelotas
  • Study Director: 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

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2006

Primary Completion (Actual)

June 1, 2007

Study Completion (Actual)

December 1, 2008

Study Registration Dates

First Submitted

January 24, 2011

First Submitted That Met QC Criteria

January 28, 2011

First Posted (Estimate)

January 31, 2011

Study Record Updates

Last Update Posted (Estimate)

January 31, 2011

Last Update Submitted That Met QC Criteria

January 28, 2011

Last Verified

January 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • monegfg11

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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