Clin Case Rep Int | Volume 6, Issue 1 | Research Article | Open Access
Paredes NA1*, Colak O1, Sfogliano L1, Elkenawy I1, Fijany L1, Torres M1, Duong T1 and Moon W2*
1Department of Dentistry, University of California, USA
2Department of Orthodontics, AJOU University, Suwon, South Korea
*Correspondance to: Ney Alberto ParedesFulltext PDF
Objective: The aim is to present a novel angular measurement system that can accurately represent the morphological changes after midfacial skeletal expander, having as a reference the precise localization of the rotational fulcrum of the zygomaticomaxillary complex in the coronal plane.
Materials and Methods: Two transverse deficient maxillary cases, 20 years old male and 18 years old female treated with MSE appliance are presented. Pretreatment and post-expansion CBCT records were superimposed and compared. After localizing the rotational fulcrum of the zygomaticomaxillary complex, a novel angular measurement method is presented and compared with a conventional linear method to assess midfacial skeletal expansion outcomes.
Results: For the male case, linear measurements showed 62.7% and 64.33% of skeletal expansion, 12.06% and 7.98% of alveolar bone bending, and 25.24% and 27.69% of dental tipping for right and left side. However, angular measurements accounted for 100% skeletal expansion and 0% of alveolar bone bending and dental tipping in both sides. For the female case, linear measurements suggested 47.79% and 51.7% of skeletal expansion, 10.91% and 20.47% of alveolar bone bending, and 41.6% and 27.83% of dental tipping for right and left side. Angular measurements represented 89.96% and 84% of skeletal expansion, 0% alveolar bone bending and 13.04% and 16% of dental tipping for right and left side.
Conclusion: The rotational fulcrum was located around the most external and inferior point of the zygomatic process of the frontal bone. Traditional linear system could underestimate orthopedic effects and overestimate dentoalveolar side effects. Angular measurements should be preferred.
Paredes NA, Colak O, Sfogliano L, Elkenawy I, Fijany L, Torres M, et al. Defining Fulcrums for Craniofacial Structures with Midfacial Skeletal Expander (MSE) Treatment and Applying Novel Angular Measurement System for Accurate Assessments. Clin Case Rep Int. 2022; 6: 1448..