If the entire pulp tissue is involved due to decay and abscess is present then we have to clean entire pulp, drain pus which is present and at last fill the canal with appropriate filling material. After this procedure crown is restored with other filling material.
What is the difference between Root Canal Therapy in a milk tooth and a permanent tooth?
As milk teeth tend to shed after certain age. In whole process of shedding teeth, first roots of a tooth starts resorbing and finally the crown shed away. Because the root of the milk teeth resorb, the inner root filling material which is used, has a property to resorb. So that when RCT treated milk tooth shed nothing left inside the bone or gums. Where as in permanent tooth inner root filling material never resorb throughout the life.