Lower Incisor Inclination and Symphysis Dimensions in Different Skeletal Patterns

Amna Farrukh; Quarat Ul Ain Anwar; Sadia Asif Samdani; Samra Bokhari; Ayesha Basit

doi:10.33897/fujd.v4i2.366

Amna Farrukh Assistant Professor, Department of Orthodontics, Hamdard College of Medicine and Dentistry, Karachi, Pakistan
Quarat Ul Ain Anwar Consultant Orthodontist, Department of Orthodontics, Altamash Institute of Dental Medicine, Karachi, Pakistan
Sadia Asif Samdani Assistant Professor, Department of Orthodontics, Isra Dental College, Hyderabad, Pakistan
Samra Bokhari Senior Registrar, National Institute of Child Health, Karachi, Pakistan
Ayesha Basit Associate Professor, Department of Orthodontics, Hamdard College of Medicine and Dentistry, Karachi, Pakistan

DOI: https://doi.org/10.33897/fujd.v4i2.366

Keywords: Lower Incisor Angulation, Mandibular Symphysis, Morphology

Abstract

Objectives: To compare lower incisor inclination and symphysis morphology in Class I, II & III malocclusion
individuals.

Materials and Methods: In 120 lateral cephalometric images of adults lacking previous orthodontic management, heights of the mandibular symphysis (LH), buccal (LA) & lingual (LP) cortex, as well as inclination, were all measured. Additionally, malocclusion types (Class I, II, & III) were considered. The independent t-test was utilized to evaluate differences in lower incisor location and symphysis dimensions. A p-value < 0.05 was considered as significant. Data analysis was done using SPSS-26.

Results: The sagittal malocclusion groups differed significantly in terms of Incisor Mandibular Plane Angle (IMPA) and symphysis size. Because the lower incisor apex in Class III individuals was near the buccal cortex, the value of LA was lower & LH was higher. Because the lower incisor apex of Class II individuals was close to the lingual cortex, their LP value decreased, and their LH value increased.

Conclusion: The sagittal malocclusion groups differed significantly in terms of IMPA and symphysis size. Because the lower incisor apex in Class III individuals was near to buccal cortex, the value of LA was lower & LP
was higher. Because the lower incisor apex of Class II patients was close to the lingual cortex, their LP value decreased, and their LH value increased.