Prediction of the individual response to treatment of skeletal Class III malocclusions and their long-term stability. A Case Report.

Predicción de la respuesta al tratamiento de las maloclusiones clase III esqueléticas y su estabilidad a largo plazo. Presentación de un caso.

• Sergio Duarte-Inguanzo Universidad Autónoma de Zacatecas, Ciudad de Zacatecas, México. https://orcid.org/0009-0008-7877-5574
• Aurora Duarte-López Universidad Autónoma de Coahuila, México. https://orcid.org/0009-0005-0386-1046
• Olga Zambrano Universidad del Zulia. Maracaibo, Venezuela. https://orcid.org/0000-0003-4867-2351
• Jesús A. Luengo-Fereira Universidad Autónoma de Zacatecas, Ciudad de Zacatecas, México. https://orcid.org/0000-0002-2780-5496

DOI: https://doi.org/10.54817/IC.v65n3a10

Keywords: Class III, facial mask, craniofacial growth

Abstract

Predicting the outcome of the treatment and its stability over time is an invaluable tool for the clinician when initiating therapy for correction of class III skeletal malocclusions. This work reports the predicted response to treatment of a 5-year-old female patient with skeletal Class III malocclusion and its long-term stability. The individual prediction cephalometric model of Baccetti and Franchi was applied in this case. As a result of the predictive equation, an individual value of -0.958 was obtained (norm = -0.4065), which predicted a “very good response to treatment”. The Class III malocclusion and anterior crossbite were corrected, and the profile was harmonized with rapid maxillary expansion (RME) and a facemask projecting the maxilla forward 12 mm, in addition to the mandible’s 9° total downward rotation. After 15 years and three months of completing the treatment, the stability of the results was confirmed. In conclusion, the individual prediction cephalometric model used in this case report allowed us to accurately predict the results in facial, skeletal and dental changes and the long-term stability of the treatment of class III skeletal malocclusion.

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