2016 Volume 25 Issue 3 Pages 321-328
This study aimed to compare the effectiveness of demineralized dentin paste (DDP) with mineral trioxide aggregates(MTA) as a direct pulp capping material. Artificial Class V cavity was prepared to make a pinpoint pulp exposure in a third of the buccal cervical region of maxillary and mandibular right/left canine teeth of six beagle dogs. After bleeding control, (hemostasis was confirmed), MTA (n= 12) was applied to the maxillary and mandibular right canines. DDP (n=12) to the left canines as a control. Superior to the pulp-capped area, the inferior 1/3 of the cavity was filled with resin modified glass ionomer, and the rest of the cavity was filled with a microfilled composite resin using one-step self etching adhesive system. Two, four, and eight weeks later, the dogs were sacrificed and the capped portion was sectioned perpendicularly to the tooth longitudinal axis of tooth to get specimens for microscopic examination. MTA formed a calcific bridge of osteo-dentin in the histological specimens from the dogs sacrificed two, four, and eight weeks later. DDP formed no calcific bridge in the histological specimens from the dogs sacrificed two weeks later but formed a physiologic dentin bridge close to actual dentin, which included dentinal tubules, in those from the dogs sacrificed four, eight weeks later. DDP-using pulp capping led to formation of a physiological dentin bridge and DDP is expected to be applicable as an effective, biocompatible material for direct pulp capping if sealing ability and easiness for handling materials are improved through further research on its properties.
