RESUMEN
Description of the clinical case of the patient with narrowing and deformation of the dentition of the upper and lower jaw and crowded teeth in the frontal part of the lower jaw in combination with a thin gingival biotype. The combined use of diagnostic methods: colorimetric probe, ultrasonic scanning and cone-beam computed tomography, followed by computer 3D-modeling of the treatment plan made it possible to competently plan and implement orthodontic treatment of the patient without complications from periodontal tissues. Combined application of colorimetric probe, ultrasonic and cone-beam computed tomography methods with digital 3D-modeling of the treatment plan allowed to plan and carry out orthodontic treatment of a patient with a thin gingival biotype without periodontal complications.