Assessment of hard and soft tissue thickness at mandibular symphysis in skeletal Class III patients with different vertical patterns.
Orthod Craniofac Res
; 2024 Jul 02.
Article
em En
| MEDLINE
| ID: mdl-38953566
ABSTRACT
INTRODUCTION:
This study aimed to assess the bony and soft tissue parameters at mandibular symphysis among skeletal Class III patients with different vertical growth patterns, using cone-beam computed tomography (CBCT). MATERIALS ANDMETHODS:
CBCT images of 60 skeletal Class III non-growing patients were evaluated (mean age 24.9 ± 8.4 years). Study samples were classified into three facial types based on the mandibular plane angle (SN-MP angle) low, normal, and high angle. The bony and soft tissue parameters at the mandibular symphysis were evaluated.RESULTS:
Among hard tissue variables, symphysis and pogonion width were significantly narrower in the high-angle group (P < .05). The thickness of the buccal cortex at pogonion was also significantly thinner in subjects with high angles (P < .01). Symphysis height showed an increasing tendency from the low-angle to the high-angle group. However, no significant differences were found in chin width and height according to vertical patterns. Across all soft tissue measurements, the low-angle group exhibited the highest thickness, which gradually decreased in the high-angle group. Statistically significant differences in soft tissue thickness were observed at Menton (Me) and Gnathion (Gn) (P < .05). A significant negative correlation was observed between the SN-MP angle and the thickness of both hard and soft tissues.CONCLUSIONS:
In skeletal Class III subjects, significant differences existed in both hard and soft tissues at the mandibular symphysis, depending on the vertical patterns. These results provide a comprehensive evaluation of symphyseal area, which can aid clinicians in identifying appropriate treatment approaches, especially for combined orthognathic and orthodontic treatment.
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MEDLINE
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article