Abstract
Purpose: The objective of this study is to investigate the characteristics of dental arch dimensions in patients with isolated MLIA through comparing them with non-hypodontia control group and to compare the dental arch dimensions in UMLIA and BMLIA subgroups.
Material and Methods: Dental casts were taken for 60 sex-matched patients, within an age range of 12 - 15 years, only affected by unilateral or bilateral congenital absence of maxillary lateral incisors, excluding third molars, in order to measure some of traditionally used parameters and new parameters which were developed and have not been studied before, and to be compared with non-hypodontia control sample. The significance test for the differences in arch dimensions between hypodontia and non-hypodontia subjects was performed using Student t-test.
Results: Intercanine width and anterior length of maxilla were significantly reduced in the patients compared with that of the controls, p < .05. Moreover, both parameters were significantly reduced in the patients with bilateral agenesis compared with those who had unilateral agenesis of upper lateral incisors, p < .05. The Incisive Depth (new parameter) and its two divisions were significantly reduced in the MLIA group compared with the control one.
Conclusion: This study concluded that the influence of MLIA appears exclusively in the anterior section of maxilla (premaxilla) to be narrowed and shorter compared with the control group and the development of the premaxillary section in both transverse and sagittal directions decreases along with diminished upper lateral incisor-number.
Keywords: Agenesis; Arch Dimensions; Maxillary Lateral Incisor
References
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