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Title: Direct adhesive pulp capping: pulpal healing and ultra-morphology of the resin-pulp interface
Authors: Fujitani, Morioki ×
Shibata, Shunichi
Van Meerbeek, Bart
Yoshida, Yasuhiro
Shintani, Hideaki #
Issue Date: Dec-2002
Series Title: American Journal of Dentistry vol:15 issue:6 pages:395-402
Abstract: PURPOSE: To test the hypothesis that healing of adhesively capped pulps may depend on the type of adhesive system used and its specific application approach. MATERIALS AND METHODS: Buccal Class V cavities were prepared in 24 intact monkey teeth. After exposing the pulps, infiltration anesthesia (Xylocaine containing 1:80,000 epinephrine) was administered around the root apex. Two adhesives that make use of a different hybridization approach, Clearfil Liner Bond II (CLB-II) and Super-Bond D Liner II (SB-II) were directly applied to the exposed cavities. The pulpal response was histopathologically investigated using light microscopy at 3 and 90 days. In addition, the resin-pulp interface was characterized by transmission electron microscopy in an attempt to elucidate the underlying mechanisms of healing. RESULTS: In the CLB-II capped pulps, little inflammation was detected at 3 days with the bonding resin intimately attached to the exposed pulpal tissue. At 90 days, a complete dentin bridge was formed in close adaptation to the resin cap. The ultra-structure of a thin intermediary layer at the bridge front resembled a so-called "reversal line". This layer typically appears during remodeling of bone to couple the newly formed to the old osseous tissue. In the SB-II capped pulps, an acute inflammation was in progress immediately beneath the bonding resin at 3 days. This tissue was resorbing the resin that had infiltrated relatively deeply into the pulp. Whereas healing of CLB-II capped pulps appeared to have been initiated promptly, healing of SB-II capped pulps was probably retarded. The formed soft-tissue hybrid layer had first to be resorbed before the formation of a dentin bridge could have been initiated. Hence, the dentin bridge was not completely finished at 90 days and no evidence of a "reversal line"-like layer could be detected. These results suggested that although both the adhesives tested appeared effective as pulp capping materials, the process and duration of healing substantially differed.
ISSN: 0894-8275
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Biomaterials - BIOMAT
× corresponding author
# (joint) last author

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