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Cephalometric Analysis of the Facial Skeletal Morphology of Female Patients Exhibiting Skeletal Class II Deformity with and without Temporomandibular Joint Osteoarthrosis.

Chen S, Lei J, Fu KY, Wang X, Yi B - PLoS ONE (2015)

Bottom Line: The cephalometric differences among the three groups were evaluated through one-way ANOVA.The cephalometric measurements that represented skeletal characteristics, including mandibular position relative to the cranial base, mandibular plane angle (MP-SN), posterior facial height (S-Go), and facial height ratio, were significantly different among the three groups (p < 0.05).Temporomandibular joint osteoarthrosis is commonly observed in female patients with skeletal class II deformity.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, PR China.

ABSTRACT

Purpose: This study evaluated the differences in the facial morphological characteristics of female patients exhibiting skeletal class II deformity with and without temporomandibular joint osteoarthrosis.

Methods: Eighty-three female patients with skeletal class II deformity were included in this study; these patients were classified into three groups on the basis of the condylar features shown in cone-beam computed tomography scans: normal group, indeterminate for osteoarthrosis group, and osteoarthrosis group. The cephalometric differences among the three groups were evaluated through one-way ANOVA.

Results: Of the 83 patients, 52.4% were diagnosed with osteoarthrosis, as indicated by the changes in the condylar osseous component. The cephalometric measurements that represented skeletal characteristics, including mandibular position relative to the cranial base, mandibular plane angle (MP-SN), posterior facial height (S-Go), and facial height ratio, were significantly different among the three groups (p < 0.05). The patients in the osteoarthrosis group yielded the smallest S-Go, the highest MP-SN, and the most retruded mandible.

Conclusions: Temporomandibular joint osteoarthrosis is commonly observed in female patients with skeletal class II deformity. The morphological characteristics of the facial skeleton in patients with bilateral condylar osteoarthrosis may be altered.

No MeSH data available.


Related in: MedlinePlus

Coordinate system and hard tissue landmarks used in cephalometric analysis.
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pone.0139743.g001: Coordinate system and hard tissue landmarks used in cephalometric analysis.

Mentions: The CBCT scans of TMJs and standardized lateral cephalograms were obtained during the initial appointment. The cephalograms were digitized and analyzed (Dolphin Imaging and Management Solutions, Chatsworth, CA, USA) by an independent examiner who was blinded to the patients’ TMJ diagnostic results. As a basis of measurements, an X–Y cranial base coordinate system was constructed on the radiographs (Fig 1). An X-axis was drawn 7° to the sella–nasion line (SN); the Y-axis was illustrated along the sella perpendicular to the X-axis [14]. The definitions of cephalometric landmarks and some measurements are presented in Table 1 and Fig 1. The measurements were repeated thrice, and the mean value was statistically analyzed.


Cephalometric Analysis of the Facial Skeletal Morphology of Female Patients Exhibiting Skeletal Class II Deformity with and without Temporomandibular Joint Osteoarthrosis.

Chen S, Lei J, Fu KY, Wang X, Yi B - PLoS ONE (2015)

Coordinate system and hard tissue landmarks used in cephalometric analysis.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4608765&req=5

pone.0139743.g001: Coordinate system and hard tissue landmarks used in cephalometric analysis.
Mentions: The CBCT scans of TMJs and standardized lateral cephalograms were obtained during the initial appointment. The cephalograms were digitized and analyzed (Dolphin Imaging and Management Solutions, Chatsworth, CA, USA) by an independent examiner who was blinded to the patients’ TMJ diagnostic results. As a basis of measurements, an X–Y cranial base coordinate system was constructed on the radiographs (Fig 1). An X-axis was drawn 7° to the sella–nasion line (SN); the Y-axis was illustrated along the sella perpendicular to the X-axis [14]. The definitions of cephalometric landmarks and some measurements are presented in Table 1 and Fig 1. The measurements were repeated thrice, and the mean value was statistically analyzed.

Bottom Line: The cephalometric differences among the three groups were evaluated through one-way ANOVA.The cephalometric measurements that represented skeletal characteristics, including mandibular position relative to the cranial base, mandibular plane angle (MP-SN), posterior facial height (S-Go), and facial height ratio, were significantly different among the three groups (p < 0.05).Temporomandibular joint osteoarthrosis is commonly observed in female patients with skeletal class II deformity.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, PR China.

ABSTRACT

Purpose: This study evaluated the differences in the facial morphological characteristics of female patients exhibiting skeletal class II deformity with and without temporomandibular joint osteoarthrosis.

Methods: Eighty-three female patients with skeletal class II deformity were included in this study; these patients were classified into three groups on the basis of the condylar features shown in cone-beam computed tomography scans: normal group, indeterminate for osteoarthrosis group, and osteoarthrosis group. The cephalometric differences among the three groups were evaluated through one-way ANOVA.

Results: Of the 83 patients, 52.4% were diagnosed with osteoarthrosis, as indicated by the changes in the condylar osseous component. The cephalometric measurements that represented skeletal characteristics, including mandibular position relative to the cranial base, mandibular plane angle (MP-SN), posterior facial height (S-Go), and facial height ratio, were significantly different among the three groups (p < 0.05). The patients in the osteoarthrosis group yielded the smallest S-Go, the highest MP-SN, and the most retruded mandible.

Conclusions: Temporomandibular joint osteoarthrosis is commonly observed in female patients with skeletal class II deformity. The morphological characteristics of the facial skeleton in patients with bilateral condylar osteoarthrosis may be altered.

No MeSH data available.


Related in: MedlinePlus