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Sex-, growth pattern-, and growth status-related variability in maxillary and mandibular buccal cortical thickness and density

Korean Journal of Orthodontics 2020년 50권 2호 p.108 ~ 119
 ( Schneider Sydney ) - University of Texas Health Science Center at Houston Department of Orthodontics

 ( Gandhi Vaibhav ) - University of Connecticut Health Center Division of Orthodontics
 ( Upadhyay Madhur ) - University of Connecticut Health Center Division of Orthodontics
 ( Allareddy Veerasathpurush ) - University of Illinois at Chicago Department of Orthodontics
 ( Tadinada Aditya ) - University of Connecticut Health Center School of Dental Medicine Section of Oral and Maxillofacial Radiology
 ( Yadav Sumit ) - University of Connecticut Health Center Division of Orthodontics

Abstract


Objective: The primary objective of this study was to quantitatively analyze the bone parameters (thickness and density) at four different interdental areas from the distal region of the canine to the mesial region of the second molar in the maxilla and the mandible. The secondary aim was to compare and contrast the bone parameters at these specific locations in terms of sex, growth status, and facial type.

Methods: This retrospective cone-beam computed tomography (CBCT) study reviewed 290 CBCT images of patients seeking orthodontic treatment. Cortical bone thickness in millimeters (mm) and density in pixel intensity value were measured for the regions (1) between the canine and first premolar, (2) between the first and second premolars, (3) between the second premolar and first molar, and (4) between the first and second molars. At each location, the bone thickness and density were measured at distances of 2, 6, and 10 mm from the alveolar crest.

Results: The sex comparison (male vs. female) in cortical bone thickness showed no significant difference (p > 0.001). The bone density in growing subjects was significantly (p < 0.001) lower than that in non-growing subjects for most locations. There was no significant difference (p > 0.001) in bone parameters in relation to facial pattern in the maxilla and mandible for most sites.

Conclusions: There was no significant sex-related difference in cortical bone thickness. The buccal cortical bone density was higher in females than in males. Bone parameters were similar for subjects with hyperdivergent, hypodivergent, and normodivergent facial patterns.

키워드

Cortical bone thickness; Cortical bone density; Facial pattern; Miniimplants
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