Author/Authors :
Nicoo, Maryam Dental Students’ Research Committee - Department of Operative School of Dentistry - Isfahan University of Medical Sciences , Fakhri, Farnaz Department of Orthodontics - Hormozgan University of Medical Sciences , Nikou, Fatemeh Department of Periodontics - School of Dentistry - Qazvin University of Medical Sciences , Parastesh, Abdossalam Dental Students’ Research Committee - School of Dentistry - Hormozgan University of Medical Sciences
Abstract :
Background: Today, the most commonly used instrument for determining the inferior face height is lateral cephalometry; however, due to the fact that some lateral cephalometric radiographs are given to the patient while taking radiation, and with regard to
the overlaps and distortions of structures in this radiograph.
Objectives: The purpose of this study was to study the inferior height of the face based on the one-third of the face in photography
and then compare its correlation with the results of cephalometry.
Methods: This descriptive-analytical study was carried out with photographic and lateral cephalometric radiographs of 75 randomly selected participants (38 women and 37 men) from among patients consulting the orthodontic clinics in Bandar Abbas in
2012 - 2013. All participants had all their permanent teeth (without third molar involvement). Patients signed an informed consent
form for participation. There was no history of head and face trauma, orthognathic surgery, previous orthodontic treatment, and
congenital anomalies. The anterior height of the face was evaluated based on the one-third of the face on photography according to
the results of FMA (Frankfort-mandibular plane angle), Sn-GoGN, Bjork, and Jarabak, and the correlations of these values with each
other were determined. Data were analyzed by SPSS software using chi-square test, kappa coefficient, and Pearson coefficient.
Results: No significant correlation was found between the photographic and cephalometric data of face height (r = -0.03, P > 0.05).
There was a significant inverse correlation between the results of FMA and Jarabak index (r = -0.6, P < 0.05). There were significant
direct relationships between the results of FMA and those of Bjork (r = 0.8, P < 0.05) and Sn-GoGn (r = 0.7, P < 0.05). There was no
statistically significant relationship between the facial form and class I and II skeletal occlusions (P > 0.05). There was nomeaningful
relationship between the results of FMA angle and facial form in class 1 and 2 occlusion subjects (P > 0.05). However, this association
was found stronger in class I than in class II occlusion.
Conclusions: There is no meaningful correlation between photographic and cephalometric measurements of facial height, and we
always need lateral cephalometrics for the correct orthodontic treatment plan and as a golden standard. Cephalometric variables
are correlated with each other for determining the vertical growth pattern, and each can be used for diagnosis alternatively.
