Relationship between Selected Cephalometric Parameters, Nasolabial Angle and Its Components in Adolescent Females

Gołębiowski, Mikołaj; Swiaţkowska, A; Pastuszak, Przemysław; Rahnama-Hezavah, Mansur

doi:10.3390/diagnostics13061199

Cited by 6 publications

References 29 publications

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Defining of the nasal anthropometry on facial computed tomography in subjects with epilepsy and healthy subjects

Öksüzler,

Polat,

Öksüzler

et al. 2024

Medicine

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Epilepsy is a frequent chronic and genetic brain disease. In diagnose of genetic and craniofacial disease, the face is one of the gold standard phenotypic features. This study was carried out to determine the angle and linear measurements of face region in Turkish healthy and epilepsy subjects, and to apply a feature selection method to identify the most important attributes that affect epilepsy decision. The retrospective and observational study was conducted with 120 subjects with epilepsy aged between 18 to 60 years (56 males; 64 females) and 60 healthy subjects aged between 18 and 55 years (29 males, 31 females). Pyramidal angle performed from 3 reference points, nasal bone length, the width of piriform aperture, nasofrontal angle, nasolabial angle, distance between glabella and nasion were measured on computed tomography. Also, we used supervised machine learning to learn classification models to detect epilepsy as our dataset has class label where 1 means epilepsy, 2 means healthy. The well-known classification model learning algorithms implemented in Weka (with version 3.8.6) machine learning toolkit were applied. All parameters excluding nasal bone length were higher in epilepsy patients than in healthy subjects. Also, there was a significant difference in nasal pyramidal angle nasal bone, nasal pyramidal angle nasal tip, piriform aperture, and nasal bone lengths between epilepsy and healthy subjects. However, age related changes for healthy subjects were no seen in healthy subjects. In epilepsy subjects there was a significant difference in 6 measurements all nasal pyramidal angles, piriform aperture width, nasofrontal angle, and nasolabial angle. Gender related changes were found in only nasal pyramidal angle nasal root and nasal bone of healthy subjects, in nasal pyramidal angle nasal bone, nasal bone length, nasofrontal angle of epilepsy subjects. We can say epilepsy may affect the some facial parameters and these, although anthropometric measurements are affected by age and gender parameters. Comprehensive knowledge of this region’s normal references ranges is essential for planning, proper selection of silicone implants or osteotomy determining the limitations of the surgical field and minimizing the risk of complication and performing aesthetic facial surgery or rhinoplasty in epilepsy patients.

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Defining of the nasal anthropometry on facial computed tomography in subjects with epilepsy and healthy subjects

Öksüzler,

Polat,

Öksüzler

et al. 2024

Medicine

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Reconsidering the role of nasolabial angle in premolar extraction decision‐making: A case‐series study

Mattos,

de Almeida,

Silveira

et al. 2024

Orthod Craniofacial Res

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ObjectivesTo evaluate the impact of changes in upper incisor inclination and position on the alteration of the nasolabial angle (NLA) in a series of cases involving the extraction of four first premolars.Materials and MethodsThe study included 41 patients who underwent orthodontic treatment with premolar extractions. The patients were divided into two groups based on their pretreatment NLA values: Group 1 (NLA ≤ 100°) and Group 2 (NLA > 100°). Measurements of NLA, U1.NA and U1‐NA were obtained before and after treatment and U1‐Ls pretreatment measure was registered. Statistical analyses were performed to compare the differences in NLA, U1.NA and U1‐NA between the two groups and to evaluate the influence of these variables added to U1‐Ls (T1) on NLA changes.ResultsThe results showed that Group 1 exhibited significant changes in NLA, while Group 2 did not. However, both groups showed significant changes in U1.NA and U1‐NA. In Group 1, 80% of the individuals presented an increase in NLA and 20% no changes. In Group 2, 10% presented a decrease, 57% no changes and 33% an increase in NLA values. Multiple linear regression analysis indicated that the group factor had a statistically significant influence on NLA variation. Additionally, in Group 2, a negative correlation was observed between changes in U1.NA and NLA.ConclusionsThe findings suggest that individuals with higher pretreatment NLA values tend to maintain their NLA values even after the correction of upper incisor inclination.

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Network analysis of three-dimensional hard-soft tissue relationships in the lower 1/3 of the face: Skeletal Class I-normodivergent malocclusion versus Class II-hyperdivergent malocclusion

Wang,

Nie,

Fan

et al. 2024

Preprint

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Background The determining effect of facial hard tissues on soft tissue morphology in orthodontic patients has yet to be explained. The aim of this study was to clarify the hard-soft tissue relationships of the lower 1/3 of the face in skeletal Class II-hyperdivergent patients compared with those in Class I-normodivergent patients using network analysis. Methods Fifty-two adult patients (42 females, 10 males; age, 26.58 ± 5.80 years) were divided into two groups: Group 1 (G1), 25 subjects, skeletal Class I normodivergent pattern with straight profile (Class I-norm-straight); Group 2 (G2), 27 subjects, skeletal Class II hyperdivergent pattern with convex profile (Class II-hype-convex). Pretreatment cone-beam computed tomography (CBCT) and three-dimensional (3D) facial scans were taken and superimposed, on which 3D landmarks were identified manually, and their coordinate values were used for network analysis. Results (1) In sagittal direction, G2 correlations were generally weaker than G1. In both the vertical and sagittal directions of G1, the most influential hard tissue landmarks to soft tissues were located between the level of cemento-enamel junction (CEJ) of upper teeth and root apex of lower teeth. In G2, the hard tissue landmarks with the greatest influence in vertical direction were distributed more forward and downward than in G1. (2) In G1, all the coefficients in the correlation matrix of sagittal and vertical positions of hard tissue landmarks were positive. In G2, the values of those coefficients decreased. In G1, all the correlations for vertical-hard tissue to sagittal-soft tissue position and sagittal-hard tissue to vertical-soft tissue position were positive. However, G2 correlations between vertical-hard tissue and sagittal-soft tissue positions were mostly negative. Between sagittal-hard tissue and vertical-soft tissue positions, G2 correlations were negative for mandible, and were positive for maxilla and teeth. Conclusion Compared with Class I-norm-straight patients, Class II-hype-convex patients had more variations in soft tissue morphology in sagittal direction. In vertical direction, the most relevant hard tissue landmarks on which soft tissue predictions should be based were distributed more forward and downward in Class II-hype-convex patients. Class II-hype-convex pattern was an imbalanced phenotype concerning sagittal and vertical positions of maxillofacial hard and soft tissues.

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Relationship between Selected Cephalometric Parameters, Nasolabial Angle and Its Components in Adolescent Females

Cited by 6 publications

References 29 publications

Defining of the nasal anthropometry on facial computed tomography in subjects with epilepsy and healthy subjects

Defining of the nasal anthropometry on facial computed tomography in subjects with epilepsy and healthy subjects

Reconsidering the role of nasolabial angle in premolar extraction decision‐making: A case‐series study

Network analysis of three-dimensional hard-soft tissue relationships in the lower 1/3 of the face: Skeletal Class I-normodivergent malocclusion versus Class II-hyperdivergent malocclusion

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