A method of measuring the apical base

The maxillary and mandibular apical base areas were measured, using a gnathograph, on the study casts of 156 adults and children representing Class II division 1, Class II division 2 and Class III malocclusions. There were significant differences between the groups at each age. The maxillary apical...

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Bibliographic Details
Published in:European journal of orthodontics 1996-10, Vol.18 (5), p.479-483
Main Authors: Sergl, H. G., Kerr, W. J. S., McColl, J. H.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Age Factors
Alveolar Process - pathology
Analysis of Variance
Cephalometry - methods
Child
Dental Arch - pathology
Dental Models
Dentistry
Female
Humans
Linear Models
Male
Malocclusion, Angle Class II - pathology
Malocclusion, Angle Class III - pathology
Mandible - pathology
Maxilla - pathology
Regression Analysis
Tooth Apex - pathology
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Summary:The maxillary and mandibular apical base areas were measured, using a gnathograph, on the study casts of 156 adults and children representing Class II division 1, Class II division 2 and Class III malocclusions. There were significant differences between the groups at each age. The maxillary apical base areas tended to be smaller for the adults than for the children in all three occlusal classes. By contrast, the mandibular apical base areas tended to be larger for the adults than for the children, except in Class II division 1 malocclusion. Following a logarithmic transformation to stabilize the variance, regression lines were fitted to relate the size of the maxillary and mandibular apical bases to one another, for the malocclusion groups within each age group. The method gives additional information regarding the degree of apical base discrepancy in a given case, but more work is required before it can be used as a diagnostic tool.
ISSN:0141-5387
1460-2210
DOI:10.1093/ejo/18.5.479