Background: Full pulpotomy has been the treatment of choice for normal or reversibly inflamed exposed pulps in primary molars. However, this approach has its own disadvantages and may be simplified down to a more conservative type of pulpotomies which is the "partial pulpotomy".

Though the literature is still lacking high quality studies on partial pulpotomy in primary molars.

Since MTA has demonstrated the highest success in the literature in comparison to other pulpotomy agents, it is going to be the choice in this trial. Aims: This study aims to investigate the success of partial vs full pulpotomies using MTA in vital primary molars without irreversible pulpitis. Methods: This is an RCT with a split-mouth design, comparing the radiographic and clinical changes of full vs partial MTA-pulpotomies over a one-year period in primary molars. The study will involve 25 healthy children, aged 4-8 years, who are attending JUST postgraduate clinics for dental treatment. Children with pair-matched primary molars that are present with advanced caries exposing the pulp or requiring pulpotomy will be enrolled. Teeth will be randomly assigned to either full or partial pulpotomy. Both procedures will be conducted under LA and rubber dam isolation.

The whole coronal pulp is going to be removed in full pulpotomy compared to 1-3 mm of the coronal pulp in partial pulpotomy. For both procedures, MTA will be placed, then the tooth will be restored with IRM, with the SSC as the final restoration. Afterwards, participants are going to be followed up clinically every 3 months, and radiographically every 6 months over the study period.

Expected results: partial pulpotomy is expected to be a viable alternative to the full pulpotomy, Partial pulpotomy might be recommended as a treatment option since it is more conservative to the pulp and involves less damage to the hard tissues rendering the tooth easier to restore. More importantly, the procedure is assumed to be less painful and more acceptable to young children with limited cooperation