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JYMS : Journal of Yeungnam Medical Science

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2 "Class III malocclusion"
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A Lateral Cephalometric Study of Maxillofacial Morphologic Features in Class III Malocclusion Children.
Woo Ill Sohn, Ic Jun Chang, Jae Chul Song, Byung Rho Chin
Yeungnam Univ J Med. 2001;18(2):208-214.   Published online December 31, 2001
DOI: https://doi.org/10.12701/yujm.2001.18.2.208
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BACKGROUND
When we make treatment plan of class III malocclusion children, it is difficult to determine whether we treat it with orthognathic surgery or without orthognathic surgery. To determine that, we must consider many factors, such as cephalometric analysis, growth pattern, family history, and skeletal age. A Harvold cephalometric analysis is useful in determining the amount of discrepancy by comparing the maxillary unit length with mandibular unit length. We tried this study to help the decision of treatment planning in class III malocclusion children by comparison in class III malocclusion and normal occlusion children using a Harvold analysis. MATERIALS AND METHODS: The materials for this study consisted of 20 class III malocclusion children. Cephalometric tracing and measurements were performed by one investigator. The control group consisted of 18 normal occlusion children and lateral cephalograms were obtained from 8.5 to 14.5 years old children biannually. The relationships between class III malocclusion group and normal occlusion group were evaluated statistically. RESULTS: The lower anterior facial heights between two groups were not significantly different, although the lower anterior facial heights of class III malocclusion group was higher than those of normal occlusion group in all age groups. The Maxillary-mandibular unit length differences of class III malocclusion group were significantly higher than those of normal occlusion group(p < 0.05). CONCLUSION: A Harvold analysis was useful to make treatment planning for class III malocclusion children.
Soft Tissue Change After Single Jaw(mandible) Surgery in Skeletal Class III Malocclusion.
Kwang Soo Park, Hee Kyung Lee, Byung Rho Chin
Yeungnam Univ J Med. 1997;14(1):197-208.   Published online June 30, 1997
DOI: https://doi.org/10.12701/yujm.1997.14.1.197
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  • 1 Crossref
AbstractAbstract PDF
The purpose of this study was to evaluate the amount and interrelationship of the soft and hard tissue change after mandibular setback surgery in skeletal Class III malocclusion. The sample consisted of 25 adult patient (12 male and 13 female) who had severe anteropostrior skeletal discepancy. These patient had received presurgical orthodontic treatment and surgical treatment which is bilateral sagittal split ramus osteotomy. The presurgical and postsurgical lateral cephalograms were evaluated. The computerized statistical analysis was carried out with SPSS/PC program. The result were as follows: 1. After mandibular bilateral sagittal split ramus osteotomy, lower facial soft tissue horizontal posterior changes were high significance value. but vertical soft tissue changes were low significance value. 2. After mandibular bilateral sagittal split ramus osteotomy, relative upper lip protrusion increased(p<0.01) and relative lower lip protrusion decreased(p<0.01) and lower facial soft tissue thickness increased(p<0.01).

Citations

Citations to this article as recorded by  
  • Soft Tissue Changes After Posterior Impaction and Setback of the Maxilla With Le Fort I Osteotomy in Skeletal Class III Patients
    Hyeong-Min Jeon, Jin-Young Choi, Seung-Hak Baek
    Journal of Craniofacial Surgery.2014; 25(4): 1495.     CrossRef

JYMS : Journal of Yeungnam Medical Science
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