Study on the Effect of Adenoid Hypertrophy on the Morphological Development of Mandible in Adolescents with Different Vertical Facial Types of Class II Malocclusion

초록

To investigate the effect of adenoid hypertrophy on the morphological development of the mandible in adolescents with different vertical facial types of Class II malocclusion, 104 patients who met the inclusion criteria were selected. Beam Cone Computed Tomography (CBCT) was used to measure the angle and linear parameters before and after treatment, and a totallated of 23 re parameters were measured in all three-dimensional models using Invivo5.0 software. Independent-samples t-test was conducted to observe whether there was a statistically significant difference between the groups' data, P-values < 0.05 were considered statistically significant. Experimental results confirmed that adenoid hypertrophy had a significant effect on mandibular morphogenesias IIin Cl malocclusion high angle adolescents (P<0.05) and a lesser effect on mandibular morphogenesis in Class II malocclusion homogeneous adolescents (P>0.05). The differences in the horizontal, coronal and vertical openness of the mandible in relation to thewere skull statistically significant (P<0.05) in the hypertrophic hypergoniacal cases compared to the non-hypertrophic Class II malocclusion hypergoniacal cases, while mandibular Angle width GoR-GoL, mandibular volume length Co-Pog, mandibular body length L-a and mandibular branch length L-b, chin height B-Me and chin thickness C<acute accent>-C index difference were statistically significant ; The (P<0.05) differences in the development of mandibular opening relative to the cranium, mandibular length and width, and mandibular ascending length and width were not statistically significant (P>0.05) compared with non-adenoidal hypertrophy in Class II malocclusion homogeneous cases, the difference of chin thickness C-C<acute accent> in chin morphology was statistically significant (P < 0.05). Thisy stu provides a theoretical basis for the clinical treatment of patients with various skeletal facial types affected by adenoid hypertrophy.

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