Does Skeletal Surgery for Asymmetric Mandibular Prognathism Influence the Soft Tissue Contour and Thickness?
| Autor: | Jin-Woo Park, Sung Tak Lee, Katsuhiro Minami, Tae-Geon Kwon, Chang Hyeon An, Yoshihide Mori |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Adult
Male Chin Adolescent Cephalometry medicine.medical_treatment Osteotomy Sagittal Split Ramus Dentistry Skeletal surgery Mandible Predictor variables Osteotomy Young Adult Imaging Three-Dimensional Image Processing Computer-Assisted Humans Medicine Nasal Bone Sella Turcica Retrospective Studies business.industry Soft tissue Cone-Beam Computed Tomography medicine.disease Incisor Malocclusion Angle Class III Treatment Outcome Mandibular prognathism medicine.anatomical_structure Facial Asymmetry Otorhinolaryngology Face Correlation analysis Prognathism Female Surgery Oral Surgery Malocclusion business Orbit Ear Canal Follow-Up Studies |
| Zdroj: | Journal of Oral and Maxillofacial Surgery. 71:1577-1587 |
| ISSN: | 0278-2391 |
| DOI: | 10.1016/j.joms.2013.04.008 |
| Popis: | The purpose of the present study was to investigate whether asymmetric mandibular prognathism accompanies a fundamental difference in soft tissue thickness and whether asymmetric mandibular setback surgery would influence the contour and thickness of the soft tissue of the chin.The present retrospective study included skeletal class III patients with significant mandibular chin deviation greater than 6 mm at the pogonion, who had undergone cone-beam computed tomography before and 6 months after surgery during a 2-year period. The predictor variables were timing (pre- and postoperatively) and side (asymmetric vs contralateral). The outcome measures were the hard and soft tissue contours and soft tissue thickness of the chin at the infradentale, B-point, and pogonion level evaluated with reformatted computed tomography images. The study variables were statistically compared using regression model and correlation analysis.The present study consisted of 20 patients (10 males and 10 females; average age 20.2 years; range, 18 to 25). Preoperatively, the chin deviation side showed a more prominent hard and soft tissue outline but had a thinner soft tissue thickness, which camouflaged the hard tissue asymmetry. After surgery, the hard and soft tissue outline was greatly improved, and the soft tissue thickness had become nearly symmetric. Most of the soft tissue thickness changes correlated negatively with the hard tissue changes.Asymmetric mandibular prognathism accompanied the 3-dimensional soft tissue contour and thickness asymmetry. Because the soft tissue responds favorably after skeletal surgery, the correction of 3-dimensional asymmetry of bone should be emphasized in patients with asymmetric mandibular prognathism. |
| Databáze: | OpenAIRE |
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