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Nonradiographic assessments of the hyperdivergent skeletal class II patient

Grant number: 12/02933-1
Support type:Regular Research Grants
Duration: September 01, 2012 - February 28, 2013
Field of knowledge:Health Sciences - Dentistry
Principal Investigator:João Roberto Gonçalves
Grantee:João Roberto Gonçalves
Home Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil


The diagnosis of patients with hyperdivergent Class II malocclusion is very important because they have been associated with higher prevalence of sleep disorders by airway obstruction, higher prevalence of temporomandibular disorders (TMD) and changes in craniocervical posture. Simplified methods for identification of these individuals in epidemiological studies have not been developed so far. The purpose of this study was to test the validity of the photographic method and the use of a facial paquimeter in the diagnosis of facial skeletal class II hyperdivergent patient, as well as enable the analysis of the craniocervical posture. It will be used a sample of 240 patients who will be starting orthodontic treatment. 120 of them were male and 120 female, aged between 7 and 12 years old. Direct facial measurements will be held using a facial paquimeter. Indirect measurements will be taken by using standardized photographs and lateral cephalograms of each patient. All measurements will be performed in natural head position. Patients will be classified by cephalometric analysis, and distributed into two groups of 120 each, regarding sagittal and vertical skeletal parameters. The first group will consist of class II hyperdivergent skeletal patients (ANB > 4,5º and SN.GoMe > 36º). Patients that presented different skeletal types will constitute the second group. Afterwards, measurements of each angular and linear variable elected for the diagnosis of skeletal pattern through the use of photographs and the facial paquimeter will be done. For each facial variable, it will be assigned its cephalometric corresponding measurements. Therefore, it will be expected the identification of the level of correlation between facial measurements and their cephalometric corresponding. Through Discriminant analysis, it will be possible to identify the measurements capable to diagnose the Class II hyperdivergent skeletal pattern. In addition, the reproducibility and repeatability of the method will be tested. Thus, the findings will allow researchers to identify and classify patients in sagittal and vertical plane, and evaluate the craniocervical posture, without the need of individual's exposure to radiation, which has fundamental importance for epidemiological studies or large-scale assessments. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ROSAS GOMES, LILIANE DE C.; CARPIO HORTA, KARLA O.; GONCALVES, JOAO ROBERTO; DOS SANTOS-PINTO, ARY. Craniocervical posture and craniofacial morphology. EUROPEAN JOURNAL OF ORTHODONTICS, v. 36, n. 1, p. 55-66, FEB 2014. Web of Science Citations: 10.
ROSAS GOMES, LILIANE DE CARVALHO; CARPIO HORTA, KARLA ORFELINA; GANDINI, JR., LUIZ GONZAGA; GONCALVES, MARCELO; GONCALVES, JOAO ROBERTO. Photographic assessment of cephalometric measurements. ANGLE ORTHODONTIST, v. 83, n. 6, p. 1049-1058, NOV 2013. Web of Science Citations: 7.

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Filed patent(s) as a result of this research project

MEDIDOR FACIAL PARA REALIZAÇÃO DE DIAGNÓSTICOS ORTODÔNTICOS BR1020120298163 - Universidade Estadual Paulista (UNESP) . Karla Orfelina Carpio Horta dos Reis; João Roberto Gonçalves - November 2012, 23