SOFT TISSUE AND INCISOR INCLINATION IN 8-10-YEAR-OLD CHILDREN WITH SKELETAL CLASS III DUE TO MAXILLARY DEFICIENCY: A CROSS-SECTIONAL STUDY ON LATERAL CEPHALOMETRICS
Main Article Content
Abstract
Objective: To evaluate incisor inclination and perioral soft tissue characteristics in 8-10-year-old children with skeletal Class III due to maxillary deficiency.
Subject and methods: A cross-sectional descriptive study was conducted on lateral cephalometric radiographs of 87 children (39 males, 48 females) in Hanoi. Measurements were performed using specialized software, including maxillary and mandibular incisor inclination, interincisal angle and soft tissue parameters (nasolabial angle, lip prominence relative to the E-line and S-line).
Results: No statistically significant differences were found between males and females in incisor inclination or soft tissue parameters (p>0,05). Compared with normative values, both maxillary and mandibular incisors showed compensatory changes with increased protrusion, altered inclination and increased interincisal angle. Perioral soft tissues, particularly the lower lip, exhibited marked protrusion relative to normal standards. Correlation analysis revealed significant associations between incisor inclination and soft tissue parameters (p<0,05) with maxillary incisors primarily influencing the upper lip and mandibular incisors strongly affecting the lower lip.
Conclusions: In children with skeletal Class III due to maxillary deficiency, coordinated dentoalveolar and soft tissue adaptations are present, reflecting underlying skeletal imbalance. These characteristics do not differ significantly between sexes at 8-10 years of age. Early assessment of incisor inclination and soft tissue profile is essential for accurate diagnosis and appropriate orthodontic treatment planning.
Keywords
Skeletal class III malocclusion, maxillary deficiency, incisor inclination.
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References
2. Lê Võ Yến Nhi, Hoàng Tử Hùng. Sự tăng trưởng sọ mặt ở trẻ em Việt Nam từ 10-14 tuổi theo phân tích Ricketts. Y Hoc TP Ho Chi Minh. 2011; 15(2):21-30.
3. Đống Khắc Thẩm, Hoàng Tử Hùng. Tương quan giữa chiều dài nền sọ trước với xương hàm trên, xương hàm dưới và chiều cao tầng mặt: nghiên cứu dọc trên phim đo sọ ở trẻ từ 3-13 tuổi. Y Hoc TP Ho Chi Minh. 2009; 13(1):10-15.
4. Eun-ju Bae. Changes in longitudinal craniofacial growth in subjects with normal occlusions using the Ricketts analysis. Korean J Orthod. 2013:71-79.
5. Hideyuki Kato, Satoshi Fujii. Application of the Ricketts analysis to children in the primary dentition: second report: a study of annual growth. Jpn J Pediatr Dent. 1988; 26:755-768.
6. Lê Nguyên Lâm, Nguyễn Bắc Hùng. Sự tăng trưởng của xương hàm dưới ở trẻ từ 12-15 tuổi theo phân tích Ricketts. Tap Chi Y Hoc Thuc Hanh. 2014; 6(923):67-71.
7. Tae Soo Park. A longitudinal cephalometric study of craniofacial growth of Korean children. Korean J Orthod. 1984;14(2):217-231.
8. Per A. Nanda. Growth changes in the craniofacial complex of children with Class III malocclusion. Am J Orthod Dentofacial Orthop. 1998;113(5):518-525.
9. Hua Wang et al. Craniofacial characteristics in children with skeletal Class III malocclusion: a cephalometric study. Angle Orthod. 2017;87(3):415-421.
10. Jae Hyun Park, et al. Early craniofacial growth patterns in Class III malocclusion: a longitudinal study in growing patients. Am J Orthod Dentofacial Orthop. 2018;153(1):92-102.