The ageing process of the face involves a level of bone erosion that generates a morphological change in the main features of a person’s face. Consequently, the muscular structures of facial expression also undergo changes in their functionality. Another important factor that can shift bone ageing in one district over the other is altered mimicry due to altered skeletal growth. The study carried out that led to the standardisation of this technique involves the restoration of the bone gap due to physiological bone ageing and bone compensation in those cases where there is an alteration of normal maxillary and mandibular development and growth. The technique involves supraperiosteal bolus infiltrations of 2-phase hyaluronic acid-based gels with very high cohesiveness for maximum volumetric compensation with a small quantity of product. This functional treatment aims to achieve a dynamic and functional modification of each patient’s subjective physiological muscle contraction. The study was substantiated by a team of specialists who highlighted the changes by means of electromyographic and ultrasound examination and photography. Key words: miofacial function, miofacial treatment, Skeletal anterior open bite, Orofacial myofunctional status, Orofacial myofunctional therapy, Filler, Anthropometry; Facial beauty; Facial measurements; Quantitative analysis.