Assessment of the soft tissue chins thickness with different skeletal vertical patterns in Pakistani adults

Abstract

The aim of the study is to evaluate and compare the soft tissue chin thickness values among adult patients with different vertical growth patterns. A sample size of 180 adults patients (32 males and 148 females), with an average age of 21.42 years (range 17-32 years), was selected. The sample was divided into three groups according to the vertical growth pattern using SNMP angle (hypodivergent <27°, normodivergent 27-37° and hyperdivergent >37°). The soft tissue chin thicknesses in each group were measured at pogonion (Pog), gnathion (Gn), and menton (Me) and analyzed using the one-way analysis of variance and post-hoc Tukey test. The soft tissue chin thickness values were greater in hypodivergent group at Pog (12.71±2.10 mm), Gn (9.72 ± 2.55 mm) and Me (9.13 ± 2.88 mm) and smallest in hyperdivergent group (Pog 8.05 ±1.20 mm, Gn 6.07±1.47 mm, Me 5.91±1.21 mm). The soft tissue chin thicknesses were greater in men than women. Soft tissue chin thickness was greater in hypodivergent adults than those of normodivergent and hyperdivergent adults. In all the three groups, soft tissue thickness values were greater in men than women.

Assessment of Various Mandibular Divergence Pattern or Vertical Cephalometric Pattern in Bangladeshi Adult Patients

“…Present study result revealed that the mean MP-18| P a g e Website: https://www.banglajol.info/index.php/UpDCJ SN angle of hypodivergent vertical cephalometric pattern was 22.09 ± 4.26 with range 12 0 -26 0 ; where as in normodivergent and hyperdivergent pattern these mean MP-SN angle found 31.61 ± 3.13 with range 27 0 -36 0 and 40.42 ± 3.68 with range 37 0 -52 0 respectively. Similar observations have been reported in studies conducted by Sattar et al [10] in Pakistan, Somaiah et al [11] in India. Also in the study Sattar et al [10] reported that the mean difference of MP-SN angle of the three groups of vertical cephalometric pattern was statistically highly significant (p=0.001).…”

“…In this study patients were stratified into four groups depending on the divergence pattern defined by the mandibular plane to cranial base angle in the following way. [10] Low (L) = MP-SN ≤ 27 0 Medium-low (ML) = 27 0 ˂ MP-SN ≤ 32 0 Medium-high (MH) = 32 ≤ MP-SN ≤ 37 0 High (H) = MP-SN ≥ 37 0 Also in this study low MP-SN angle considered as hypodivergent face, medium low (ML) and medium high (MH) MP-SN angle considered as normodiveregnt face and high (H) MP-SN angle considered as hyperdivergent face. Tracing and measurement on ceaphalometric radiograph was done by the principal investigator in a standard manner.…”

The influence of mandibular divergence on facial soft tissue thickness in class I patients: a cephalometric study

“…The results obtained by measuring the soft tissue chin thickness can be categorized into two groups. According to the first group, soft tissue chin thickness in all three levels (Pg-Pg1, Gn-Gn1 and Me-Me1) decreases by going from hypo towards hyperdivergent group, and it is statistically significant only between these two groups [5,6,7,8,22,24], which is only partly similar to our results. Namely, in the present study there is a significant difference between hypo and hyperdivergent group at level Gn-Gn1, whereas at level Me-Me1 significant differences exist between normal and hyperdivergent group.…”

“…In hypodivergent growth, these changes are reverse. There is a lack of vertical growth which can lead to the excessive exposure of incisors, deep bite and the reduced lower third of the face [1,5,25]. In normal divergence growth, vertical face growth is harmonious in relation to the growth in other directions.…”

Comparison of Soft Tissue Chin Thickness in Adult Patients With Various Mandibular Divergence Patterns

“…Existing studies in this area have primarily concentrated on dentofacial patterns rather than conducting comprehensive soft tissue analyses. One such study by Sattar et al (2018) compared Pakistani adults with established standards in orthodontics [ 14 ]. Their findings indicated that the Pakistani population tends to exhibit a more convex soft tissue profile in comparison to the established standards of Tweed and Steiner.…”