Soft Tissue Facial Profile Analysis of Adult Iraqis with Different Classes of Malocclusion

Nissan, Layth M. K.; Taha, Shaymaa Sh.; Mohammed, Shahbaa A.

doi:10.12816/0015083

Cited by 1 publication

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“…A previous Middle Eastern study found that Class II subjects had a greater value of the nasolabial angle than those with Class I; however, the difference was not significant (Gulsen et al, 2006). Conversely, other Middle Eastern studies suggested different results (Al-Saleem, 2013;Mohammed, Nissan & Taha, 2013) (CIs of NLA in Table 1 vs. their corresponding values in Table S5). A probable reason for this variability among outcomes might be the differences in the methods used to determine the nasolabial angle (Hwang, Kim & McNamara, 2000).…”

Section: Soft Tissue Componentsmentioning

confidence: 85%

Craniofacial characteristics of Syrian adolescents with Class II division 1 malocclusion: a retrospective study

Ayoubi

Torre²,

Madléna

2020

PeerJ

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Background Malocclusion characteristics vary across different ethnic groups and populations. Limited data are available regarding the characteristics of Syrian adolescents with Class II division 1 (Class II-1) malocclusion, and the recent inflow of Syrian refugees and immigrants into Europe and many areas worldwide demonstrate the need for updated studies to discover the craniofacial characteristics of these new immigrants. Objectives The present compound cephalometric and tooth-size study sought to assess the dentofacial morphology, upper-airway dimensions, and tooth-size characteristics of Syrian adolescents with Class II-1 malocclusion and compare the results with established Syrian population norms. Materials and Methods The study sample consisted of 43 Syrian patients including 24 females and 19 males with Class II-1 malocclusion (age: 14.3 (±1.5) years, mean (±SD)). Cephalometric radiographs and orthodontic casts were analyzed using special orthodontic software (OnyxCeph3™) and a universal digital caliper, respectively. Statistics were calculated using the SPSS software. Results In Syrian adolescents with Class II-1 malocclusion, the position of the mandible relative to the nasion perpendicular (mean (95% confidence interval)) was −11.01 (−12.45, −9.57) mm. Facial axis angle showed a negative value: −6.25 (−7.65, −4.85) degrees. An obtuse nasolabial angle was observed: 104.05 (101.77, 106.33) degrees. The average width of the upper pharynx was 11.50 (10.53, 12.47) mm; however, there was no prevalence of an upper-pharyngeal width of 5 mm or less. The average value of the anterior tooth-size ratio was 80.69 (79.85, 81.53) percent. In total, 39.5% of the investigated subjects had anterior ratios outside two standard deviations from Bolton’s norm, while 25.6% of the investigated subjects had anterior ratios outside two standard deviations from Syrian population norm. Conclusions In this study, the inter-maxillary discrepancy of Class II-1 Syrian adolescents was a consequence of their hyperdivergent facial pattern. The observed small pharyngeal widths were not clinically significant, while the anterior tooth-size discrepancy might be clinically relevant.

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Section: Soft Tissue Componentsmentioning

confidence: 85%