Quantitative cone-beam computed tomography evaluation of hard and soft tissue thicknesses in the midpalatal suture region to facilitate orthodontic mini-implant placement
오송희, 이새롬, 최진영, 김성훈, 황의환, Nelson Gerald,
소속 상세정보
오송희 ( Oh Song-Hee ) - Kyung Hee University Graduate School Department of Oral and Maxillofacial Radiology
이새롬 ( Lee Sae-Rom ) - Kyung Hee University Graduate School Department of Oral and Maxillofacial Radiology
최진영 ( Choi Jin-Young ) - Kyung Hee University Graduate School Department of Orthodontics
김성훈 ( Kim Seong-Hun ) - Kyung Hee University Graduate School Department of Orthodontics
황의환 ( Hwang Eui-Hwan ) - Kyung Hee University Graduate School Department of Oral and Maxillofacial Radiology
( Nelson Gerald ) - Kyung Hee University Graduate School Department of Orthodontics
Abstract
Objective: To identify the most favorable sites that optimize the initial stability and survival rate of orthodontic mini-implants, this study measured hard and soft tissue thicknesses in the median and paramedian regions of the palate using cone-beam computed tomography (CBCT) and determined possible sexand age-related differences in these thicknesses.
Methods: The study sample comprised CBCT images of 189 healthy subjects. The sample was divided into four groups according to age. A grid area was set for the measurement of hard and soft tissue thicknesses in the palate. Vertical lines were marked at intervals of 0, 1.5, and 3.0 mm lateral to the midpalatal suture, while horizontal lines were marked at 2-mm intervals up to 24 mm from the posterior margin of the incisive foramen. Measurements were made at 65 points of intersection between the horizontal and vertical lines.
Results: The palatal hard tissue thickness decreased from the anterior to the posterior region, with a decrease in the medial-to-lateral direction in the middle and posterior regions. While the soft tissue was rather thick around the lateral aspects of the palatal arch, it formed a constant layer that was only 1?2-mm thick throughout the palate. Statistically significant differences were observed according to sex and age.
Conclusions: The anterolateral palate as well as the midpalatal suture seem to be the most favorable sites for insertion of orthodontic mini-implants. The thickness of the palate differed by age and sex; these differences should be considered while planning the placement of orthodontic mini-implants.
키워드
Cone-beam computed tomography; Midpalatal suture; Thickness; Mini-implant
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