TREATMENT OF SKELETAL CLASS II BORDERLINE: A RETROSPECTIVE STUDY

Abstract

Class II malocclusions are an important part of the chief complaints in orthodontics because of their significant prevalence among the anteroposterior discrepancies, and because of the esthetic and functional discomfort pushing a large number of patients to seek medical intervention. The treatment challenges encountered by orthodontists focus on the "borderline" skeletal Class II malocclusions, presenting moderate dysmorphism that can be treated by orthodontic camouflage treatment as well as orthodontic-surgical approach. The objective of this study was to propose a formula that could guide the orthodontist towards a compromise or a treatment combining orthodontics and surgery for these "borderline" class II cases. We, therefore, conducted a retrospective study involving 77 patients.  Anteroposterior cephalograms, photographs, as well as information and medical examination documents were the equipment needed for this study.

Following the multi-varied analysis by binary logistic regression, we were able to determine the significant parameters leading to the following 6-variable equation (28.095+ (0.126 * Z) - (0.718 * SNA) + (1.425 * SNB) - (0.955 * SNPog) - (0.250 * MLSN) - (0.782 * CLII)). This equation allowed us to obtain a score likely to help practitioners decide on whether to treat Class II patients with or without orthognathic surgery. This formula could be used by orthodontists as an additional tool in the therapeutic decision, which should, above all, be based on clinical observation and radiological examination.