Tandem Skeletal Expander and MAPA Protocol for Palatal Expansion in Adults

Transverse maxillary deficiency, which is frequently seen among adolescent and adult patients seeking orthodontic care, can cre-ate clinical, esthetic, and functional problems in both arches. The cause is multifactorial, attributable to both genetic and functional factors. The most common clinical finding is a unilateral or bilateral posterior crossbite.^{1, 2} As many as 30% of adult patients may develop transverse maxillary deficiencies and posterior crossbites because their malocclusions have been left un-treated during growth.³.