Introduction: Class ii malocclusion has the highest prevalence among dentoskeletal alterations worldwide. In Colombia its prevalence is 74 %. Currently, one of the reason for administering timely treatments is the rapid response of bone and neuromuscular structures the younger the organism. Aim: To identify changes in the craniofacial complex by means of lateral X-rays of 11 patients with Class ii Division 1 malocclusion, who underwent functional orthopedic treatment with Klammt’s Elastic Open Activator (keoa).   Method: We selected a sample of 11 patients with Class ii Division 1 malocclusion between 8 and 12 years old, who underwent functional orthopedic treatment. The selected patients required a lateral x-ray before starting the treatment and once a year thereafter; the craniofacial complex changes of the patients undergoing treatment were analyzed.   Results: In all 11 patients, Class ii Division 1 malocclusion was intercepted in a timely manner. A statistically significant decrease in anb, 1/Bap, 1 sup/1 inf, and overjet was perceived.   Conclusion: In this study it was observed that keoa in the treatment of Class ii Division 1 malocclusion produced inhibited anterior growth of the upper dentoalveolar area, verticalization of upper incisors, restricted anterior migration of upper molars, and anterior positioning of point B.

Introduction: the etiology of posterior crossbite (PCM) includes dental, skeletal, muscular and functional com-ponents; It may be unilateral or bilateral. The importance of timely treatment is widely recognized and rapid maxillary expansion (ERM) is an alternative to expand the upper dental arch, it generates an improvement in the ventilation conditions of children, improving their quality of life and preventing future medical conditions. Objective: to observe in ConeBeam computed tomography (CB-CT) changes in condylar position and airway dimensions, before, during and after 6 months of MRE to correct the unilateral posterior crossbite (MCPU). Methodology: nine patients, 6 to 10 years old, with early mixed dentition, with MCPU, without dental anomalies, were treated with ERM for 3 months and 3 more months of retention; Pre- and post-treatment bimaxillary tomographies were taken to evaluate condylar position and dimensional changes of the airways. Results: the crossed side presented an increase in the anterior condyle space, a slight decrease in the superior length and a marked decrease in the posterior length between the condyle and the glenoid fossa, showing a posterior displacement, confirming a posterior position, after the MRA was performed. The non-crossed side presented the same behavior. At the level of airway volume, there were no statistically significant changes. Conclusions: ERM is effective for the treatment of CPM in mixed dentition since it changes the shape of the maxilla, generates changes in condylar position with stable results over time that favor the harmonious deve-lopment of the craniofacial complex.

Introduction: The difficulties in correcting the bone discrepancies of class iii malocclusions due to the complexity of existing treatments, the unpredictability of bone growth, the development and treatment outcomes for young patients, and the evident physical characteristics of the subjects who suffer from them make them a challenge when considering successful treatment plans for correction.   Case: A 10-year-old male patient attended the maxillary orthopedics clinic of the graduate program Pediatric Dentistry and Maxillary Orthopedics of the School of Dentistry at the Universidad del Valle (Cali-Colombia) for re-evaluation. He does not report family history of skeletal or dental anomalies; a prominent chin is clinically observed.   Aim: To assess the effect of a treatment with hybrid hyrax, protraction mask and mini-implants in a patient for the correction of class iii malocclusion.   Results and conclusions: The combination of hybrid hyrax, face mask and Alt-ramec protocol responds to a real skeletal change due to the direct transmission of forces to the bone, thus abolishing the den- toalveolar camouflages that produce satisfactory results at the dental, facial and even psychological levels in patients with class iii skeletal malocclusion.