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Journal of Oral Science & Rehabilitation Volume 2 | Issue 3/2016 39 P u l p r e s p o n s e a f t e r c a p p i n g w i t h P D G F Fig. 6 Figs. 7 & 8 Fig. 6 Photomicrograph of Site B. Buccolingual section. Within the cavity (C), debris is visible. Between the cavity and the pulp (P), the dentin bridge (DB) runs horizontally from the cut surfaces, covering most of the exposed dental pulp. This hard tissue is very thin on the right side close to the original dentin tissue, is the thickest in the central area of the defect and is incomplete on the left side (black arrow). The dental pulp presents no inflammatory response and has an orga- nized structure, but for the area close to the dentin bridge interruption, where a disorga- nized and fibrous clot-like tissue is observed. H&E staining (at original 20× magnification). Fig. 7 Detail of Figure 6. The repa- rative dentin (DB) is tubular and well organized. Odonto- blast-like cells (O) are between the dental pulp (P) and the predentin (PD) tissue. The pulp is well organized and without inflammatory cells. H&E staining (at original 400× magnification). Fig. 8 Detail of Figure 6. In corres- pondence with the dentin bridge interruption, the pulp is not in direct contact with the cavity. A disorganized clot- like tissue (Cl) with many fibroblasts (F) and few inflam- matory cells is apparent between the cavity and the pulp in close contact with bacteria and debris. Masson’s trichrome staining (original 600× magnification). Volume 2 | Issue 3/201639