The use of PDT, especially counter-rotational and oscillating-rotating brushes, can be beneficial in reducing the levels of gingival bleeding or inflammation. There is a need for methodological homogeneity in future studies in this field to enable quantitative analysis of their results.

Managing a crossbite unidental in an adolescent by means of functional orthopedic treatment maxillary (Bimler C) after a few months of permanent use, it is unsatisfactory in the functional, occlusal and aesthetic area. Allowing for the patient with a point pleasant, and avoiding a sequence of tissue damage dental, bone and periodontal that can have irreversible consequences for teens. It is necessary to a good clinical examination and a sound plan of treatment for the functional orthopedics of the Maxillas allow for the correct solution to this malocclusion. Key words: Anterior crossbite, orthopedic treatment maxillary, Bimler C.

Objective: Determine the stages of vertebral bone maturation in children 8-14 year-old belonging to Colombian mestizo population at the Valle del Cauca. Materials and methods: Cervical bone maturation is an effective method to determine the pubertal growth spurting children, this allows to evaluate the ideal time to iniciate orthodontic or orthopedic treatment. In 130 lateral radiographs beloning to children 8 to14 year-old from records of the graduate orthodontic clinic of the university colleges of Cali Colombia were analized using cervical bone maturation according to the Baccetti modified method. Results: We found that children in this age range had their pubertal growth spurt at 12to 14 year of age. Conclusion: The cervical bone maturation stage (CVS3) corresponding to the pubertal growth peak in the age group12 to14 yearold is reached first by the girls.   Key words: Vertebrae cervical, orthodontics, radiography, cervical bone maturation.