Craniofacial Growth in Adolescence and its Influence on the Mandibular Incisor Crowding /Kraniofacijalni rast u adolescenciji i utjecaj na zbijenost mandibularnih sjekutiaea

• Published in: Acta stomatologica croatica Vol. 55; no. 1; p. 37
• Main Authors: Milos, Danira, Pavliæ, Andrej, Vandevska-Radunoviæ, Vaska, Zigante, Ma, Matthewson, Alana, Spalj, Stjepan
• Format: Journal Article
• Language: English
• Published: Sveuciliste U Zagrebu 01.03.2021
• Subjects: Comparative analysis; Computer industry; Growth; United States; Iraq; Croatia
• ISSN: 0001-7019
• DOI: 10.15644/aSc55/1/5

Background: To analyze craniofacial growth during adolescence from the ages of 12 to 21 years and its relation to late mandibular incisor crowding. Methods: The study included 61 orthodontically untreated subjects (49% males). Lateral cephalograms were used to assess the jaw growth and inclination of the incisors. Little's Irregularity Index and the anterior mandibular dental arch depth of mandibular dentition were measured. Results: A reduction of the skeletal class angle (ANB) was observed in both genders, although it was significant only in males ([eta]2=0.188; p=0.015). The growth of the mandible was more prominent compared to that of the maxilla, and it was more prominent in males than in females. The skeletal vertical dimension, however, demonstrated a significant reduction in both genders ([eta]2=0.527-0.593, p<0.001). The mandibular incisors tended to retrocline in both genders, while the maxillary ones tended to procline in males, and slightly retrocline in females. A decrease in the mandibular dental arch depth occurred in both genders ([eta]2=0.259; p<0.05). An increase in the irregularity of incisors for 1.8[+ or -]1.7 mm on average (95% CI 1.3-2.2; [eta]2=0.520; p<0.001) was observed in both genders. A logistic regression revealed that less sagittal growth of maxilla (increase of SNA angle [less than or equal to]2[degrees]) and reduction of convexity in skeletal sagittal interjaw relationship (reduction of ANB [greater than or equal to]1[degrees]) were significant predictors of the occurrence of crowding ([DELTA] Little Irregularity Index [greater than or equal to]1mm) yielding odds ratios of 4.9 and 4.8. Conclusions: The differential growth of the maxilla and mandible is related to the occurrence of late crowding, mostly in smaller amounts in maxillary sagittal growth compared to the mandible. Author keywords: Growing subjects; Malocclusion; Adolescence; Cephalometry; Crowding