Altura de la rama mandibular y su relación con el ángulo SN GO-GN en radiografías cefálicas laterales digitales

Abstract

The present research study aims to establish the height of the mandibular ramus and its relationship with the SN Go-Gn angle in digital lateral cephalic radiographs in patients from 18 to 45 years old from the city of Cuenca-Ecuador. Materials and Methods: This study, quantitative, observational with a correlational approach, was carried out on digitalized lateral cephalic radiographs that rest in the archive of a radiological center in the city of Cuenca - Ecuador and included a total of 388 lateral radiographs chosen under certain criteria of inclusion and exclusion. The variables analyzed were mandibular ramus height, SN Go-Gn angle, and sex. The measurements were made, applying the AUTOCAD 2018 software, by an examiner previously trained for this purpose, and subsequently validated by the author of the study. The data obtained from the different measurements were recorded in an Excel spreadsheet. To evaluate the relationship between the height of the mandibular ramus and the SN Go-Gn angle, the Pearson r correlation coefficient was used, for the interpretation the suggestion of Cohen (1988) was followed; null correlation (0.00 ≤ r <0.10), slight correlation (0.10 ≤ r <0.30), moderate correlation (0.30 ≤ r <0.50) and strong correlation (0.50 ≤ r < 1). For the comparison, the parametric t-Student statistic was used, the significance considered was 0.01 (p<0.01). The data processing was carried out in the statistical program SPSS V27. Results: A strong negative correlation was found between the height of the mandibular ramus and the SN Go-Gn angle (r= -0.535; p<0.001), which implies that the higher the height (mm), the lower the angle (°). Conclusion: The results showed that there is a relationship between the height of the mandibular ramus and the SN Go-Gn angle, in patients from 18 to 45 years old. Key words: mandibular Ramus, mandibular growth