Are chin and symphysis morphology facial type-dependent? A computed tomography-based study
| Autor: | Nir Shpack, Tatiana Sella Tunis, Israel Hershkovitz, Rachel Sarig, Alexander D. Vardimon, Hila May |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Chin Adolescent Symphysis Cephalometry medicine.medical_treatment Population Orthognathic surgery Orthodontics Computed tomography Mandible 03 medical and health sciences Young Adult 0302 clinical medicine medicine Humans Head and neck education Aged Aged 80 and over education.field_of_study medicine.diagnostic_test business.industry 030206 dentistry Middle Aged stomatognathic diseases medicine.anatomical_structure Facial type Face Mandibular plane Female business Tomography X-Ray Computed 030217 neurology & neurosurgery |
| Zdroj: | American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics. 160(1) |
| ISSN: | 1097-6752 |
| Popis: | Introduction The chin is a major determinant of the facial profile; hence, it plays a major role in orthodontics and orthognathic surgery. It is thus essential to follow and better understand its expression in different facial types. The major objectives of the current study were to characterize morphometrically the chin and symphysis and reveal their association with different facial types. Methods Computed tomography scans of the head and neck of 311 adults (163 males, 148 females; age range, 18-95 years) were classified into 3 facial types: short, average, and long. Height, width, projection, inclination, thickness, and area were measured on the chin and symphysis. Results The majority of the population (70%) manifested an average facial type; the other 30% were almost equally distributed between short and long facial types. The long facial type was more common among females and the short facial type among males. Chin projection, area, and size were significantly greater in short-faced patients. Chin width in males was similar for all facial types, whereas, in females, chin width was the widest in the short facial type and the narrowest in the long facial type. Symphysis height was significantly greater in long-faced patients in both sexes. The mandibular incisors’ inclination relative to the mandibular plane was not significantly associated with the chin or symphysis morphology. Conclusions Chin and symphysis morphology is facial type–dependent. Orthodontists and maxillofacial surgeons should be aware of the complex relationship between facial types and chin/symphysis size and shape when planning treatment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect