Although we can distinguish clinically the SCTG predominantly richer in lamina propria or submucosa, incisional biopsies of the grafts will be performed to confirm the nature of the tissue removed. The specimens will be approximately 2mm x 6mm being removed from the grafts of groups A and B. The specimens will be fixed in 10% formalin in phosphate buffer pH 7.3 for one week. They will then be rinsed in running water for 24 hours and kept in 70% ethanol until the next day. Histological processing will consist of dehydration in ethanol, diaphanization in xylol and inclusion in Histosec # (paraffin + synthetic resin) in an oven at 60oC. From the selected paraffin embedded cases, serial cuts with approximately 5 μm thickness will be performed, in a microtome; Then drawn in water and mounted on silanized slides. The cuts on the silanized slides will be submitted to routine histochemical technique staining with Hematoxylin and eosin.