Orthodontic diagnosis for cleft lip and palate patients based on analysis of scar tissue

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This study was attempted to establish new orthodontic diagnosis for cleft lip and palate patients based on the analysis of post-surgical scar tissue. The non-contact laser Doppler flowmetry was applied to measure palatal tissue blood flow in order to analyze scar tissue distribution. This method is useful for analyzing the scar tissue distribution even in patients with severe palatal deformities. The ultrasonic device was applied to measure thickness of scar tissue formed across pterygoid-palatine junction. The effect of maxillary protraction was cephalometrically investigated in both unilateral cleft lip and palate and isolated cleft palate patients. The results suggested that forward displacement of the maxilla by treatment depends on individual growth potential of the maxilla influenced by the post-surgical tissue. Influence of palatal scar tissue on the maxillary anteroposterior growth was also investigated on rat's palates. The results suggest that anteroposterior growth inhibition is due to the suppression of bone addition by formed scar tissue across the transverse palatal suture.