Conclusions MTA cements have a higher success rate , with a lower inflammatory response and a more predictable hard dentin barrier formation  than calcium hydroxide cements .
However , there were no differences , in these parameters , when MTA cement was compared with tricalcium silicate cements .
Dental adhesives systems showed the lowest success rates
Introduction Direct pulp capping therapies use bio material s to protect exposed tissues , inducing repair through the production of a mineralized barrier .
The purpose of this study was to compare the effectiveness of bio material s and techniques by means of a systematic review and meta‐ analysis .
Direct capping of human pulps with a dentin bonding system or with calcium hydroxide cement.
OBJECTIVE To study human pulp reactions to direct cappings with a dentin adhesive compared with a calcium hydroxide cement , especially with respect to formation of hard tissue in the exposure site . STUDY DESIGN Direct pulp cappings were made in 34 caries-free premolars scheduled for extraction due to orthodontic treatment . Half of the teeth were capped with a dentin adhesive , the other half with a calcium hydroxide cement . After periods of from 7 to 70 days , the teeth were extracted and processed for light microscopical examination . RESULTS No postoperative sensitivity was experienced . A slight inflammatory reaction was seen in both groups in the short observation period . In the long observation period , significantly more " dentin bridging " was seen in the calcium hydroxide group than in the dentin adhesive group ( P < .05 ) . CONCLUSION The findings from the present limited material is in accordance with previous findings from human studies and contraindicate use of dentin adhesives for direct pulp capping
Conclusions MTA cements have a higher success rate , with a lower inflammatory response and a more predictable hard dentin barrier formation  than calcium hydroxide cements .
However , there were no differences , in these parameters , when MTA cement was compared with tricalcium silicate cements .
Dental adhesives systems showed the lowest success rates
Introduction Direct pulp capping therapies use bio material s to protect exposed tissues , inducing repair through the production of a mineralized barrier .
The purpose of this study was to compare the effectiveness of bio material s and techniques by means of a systematic review and meta‐ analysis .