Deep bite malocclusion impacts function of the stomatognathic system, patients' quality of life and self-stem by compromising oral and facial esthetics. The malocclusion can involve teeth and facial skeleton, for such is one of the most challenging malocclusion treatments. The aim of this investigation is to check the clinical belief that Planas' Equiplan is efficient to treat deep bite malocclusion. Dental overbite was measured in 21 patients submitting to Jaw Functional Orthopedics treatment at post-graduation course. The inclusion criteria were a vertical trespass of the incisal border of the upper incisors covering the vestibular face of the lower incisors more than 3 mm, treatment cooperation and a consent form signed by the patients, or their legal tutor, allowing the use of the data obtained for research and didactic purposes. The initial measurement (T0) and 15 months treatment (T1) was collected to study overbite behavior during treatment with Planas' Equiplan. The mean overbite of the sample at T0 was 5,02 ± 1,311 mm, at T1 the mean overbite was 2,38 ± 1,026 mm. The difference T1-T0 is -2,65 ± 1,462 mm (𝑝 0,01). The data presented here supports the efficacy of the use of Planas' Equiplan in the treatment of Deep bite Malocclusion.