Inclusion Criteria:  Patient inclusion criteria  ASA 1 patient, Patient is a completely healthy & fit. No allergy or medical conditions. Patient is indicated for treatment under General Anesthesia: young age, uncooperative and extensive treatment plan. Parent agreed to participate in the study, and signed the written consent. Patient attended the out-patients pediatric dental clinic in UZ Gent.  Tooth inclusion criteria 2.1. Clinical inclusion criteria:  Vital primary molars (first or second) with deep caries cavity with pulpal exposure. Only mandibular primary molar were included No spontaneous pain No history of swelling No sinus tract/ fistula Absent of tenderness in percussion No pathological mobility Restorable tooth (stainless steel crown can be placed) Hemostasis can be achieved with a dry cotton pellet after removal of Coronal pulp.  2.2. Radiographical inclusion criteria:  At least 2/3rd of root is present Absence of internal or external root resorption Absence of pathologic root resorption Absence of periapical or furcation radiolucency  Exclusion Criteria:  If one or more of the criteria mentioned above is not fulfilled, the teeth were excluded from the study.