IADR Abstract Archives

Natural Head Position in Analysis of the Soft-Tissue Facial Profile

Objectives: The aim of this study is to compare the results obtained in clinical photographs taken in Natural Head Position (NHP) and Natural Head Position Orientation (NHPO), to demostrate that the latter allows a reliable diagnosis of the Analysis of the Soft-Tissue Facial Profile and subsequent treatment plan.
Additionally, it is expected to confirm the reproducibility of the NHPO.
Methods: The study was carried out by 2 operators and a sample of 20 patients. The inclusion criteria of the sample were 20 to 30-year-old, female and male Dentistry students at Universidad Mayor, Chile. Students who underwent or were currently undergoing orthodontic treatment were excluded from the study. Each patient was photographed 3 times using an established protocol. The first photograph was taken in NHP, without the use of a mirror; the second and the third photograps were taken in NHPO, using a mirror as a reference.
Results: Differences were observed in the position of the pogonion soft tissue regarding to the Spradley’s Vertical (p=0.0333) between the photographs taken in NHP and those taken in NHPO. There were no significant differences between the results of the upper lip (p=0.1289) and the lower lip (p=0.0526) regarding the Spradley’s Vertical.
Furthermore, reproducibility was confirmed because, in 75% of cases, the difference between each photograph's reference lines was between 0 and 3 °.
Conclusions: Altogether, our results show that NHPO is the most reliable position for diagnostic Analysis of the Soft-Tissue Facial Profile because it used the True Horizontal Plane as a reference plane and is reproducible over time.

2020 Chilean Division Meeting (Virtual)

2020

Orthodontics Research
  • Zafe, Fadua  ( Universidad Mayor , Santiago , Chile )
  • Figueroa Salinas, Macarena  ( Universidad Mayor , Santiago , Chile )
  • Chamorro Pino, Susana  ( Universidad de Chile , Santiago , Chile )
  • Cortínez Lira, Cristine  ( Universidad Mayor , Santiago , Chile )
  • NONE
    Oral Session
    Oral Session 1