الفهرس 
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Abstract
This study was conducted to evaluate and compare the clinical and radiographic efficiency of ferric sulfate and MTA to that of FC as pulp dressing agents in pulpotomy of primary molars with carious pulp exposure.
The study comprised 90 medically free patients with deep carious mandinular primary molars with an age ranged from 4 to 7 years, were divided into three groups (30 teeth each); the FC group considered as the control group while FS group and MTA group represented the experimental groups. After the application of each material, the cavity was filled with amalgam and the tooth restored finally with stainless steel crown.
The patients were followed up clinically and radio graphically for 1 year and 3, 6 and 12 months to assess pulp exposure.
Clinical follow-up of the 3 pulp dressing agents revealed 100%clinical success rate. At 6 months two teeth in Fs group exhibited mobility sensitivity to percussion which continued to the end of follow-up period. Thus, the clinical success rate was 93.3% at the end of follow-up period. In FC group, there were two cases of failures seen at the end of follow-up period. Therefore, the clinical success rate was lowered to 93.3%.
In MTA group, all teeth were free from mobility, abscess formation or draining sinus at 3, 6 and 12 months. Therefore, the clinical success rate was 100%.
Radiographically, In FC group after 3 months, periapical radiographs did not reveal any pathological changes providing 100% success rate. The radiographic success rate decreased to 93.3% and 83.3 at 6 months and 12 months intervals. The most common radiographic change observed in this group was periapical radiolucency.
In Fs group, only one tooth exhibited radiographic pathological changes after 3 months of follow-up period giving a 96.7% radiographic success rate. At 6 months, the radiographic success rate DROPped to 73.3% and continued to decrease at the end of follow-up period until reached 70%. The most common radiographic findings observed in this group were internal root resorption and periapical radiolucency.
In MTA group, the radiographic success rate was 100% at the entire follow-up period.