DPC- DIRECT pulp caping cant be done in a deciduous teeth ….reason being is that when you place ca(OH)2 on the pin point pulpal exposure(iatrogenic)….it causes necrosis of the pulp in tht pin point area….this invoke inflammatory reaction inside that pin point region of pulp….now this inflammation can either be restrictd to tht area only or it can spread to whole pulp….this inflammation can attract OSTEOCLAST cells which can cause internal resorption of deciduous tooth….(MC DONALD AVERY DEAN 8th edition pg.408)
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