OBJECTIVES:Comparisson of skeletal and dental responses to two types of RME devices. METHODS:28 subjects ranging from 8-20 years of age suffering from maxillary transverse deficiency were randomly assigned to either the 2-or4-band RME treatment group. Radiographic and dental cast measurements were gathered at baseline (T0), at initiation (T1) and completion (T2) of RME therapy, and one year post-expansion (T3). RESULTS:At T2, the suture expansion was 2.5 greater, and arch perimeter 6 fold larger in the 4-band than the 2-band group. Suture area increased 3 times more in the 4-band group, however, a 6-fold greater increase in dental expansion was found in the 2-band group (T2). At T3, re-mineralization reduced the achieved suture opening by 75% while 95-99% of the dental reaction was maintained. The 2-band group demonstrated a significant inverse age-dependant correlation (r = -0.795), and lack of effect beyond age 12, while the 4-band group was found to be age-independent. Conclusions: the 4-band RPE is indicated when an anteriorly convering arch form occurs together with severe anterior crowding, while the 2-band RPE may be more appropriate in the mixed dentition when mild crowding occurs with posterior constriction.

Back to the Scientific Program Program
Back to the Joint Meeting of the Continental European, Israeli, and Scandinavian (NOF) Divisions of the IADR (August 25 -- 28, 2004)

Top Level Search