gluma and Pulpitis

The pulpal reaction associated with a composite resin alone and composite resin used in conjunction with two dentine bonding agents was studied. Class V cavities were prepared on the labial surfaces of the canine teeth of 18 male ferrets. After acid etching of the enamel margins, the cavities were restored with either a composite resin alone or in combination with one of two dentine bonding agents, Scotchbond and Gluma. One cavity in each animal was filled with Kalzinol as a control. The animals were killed after 7, 14 and 28 days. After histological processing, the pulpal changes were assessed qualitatively and quantitatively according to standard criteria. There were variations in the pulpal response at all time intervals. The responses to the two dentine bonding agents were similar to those found with composite resin alone. No pulpal inflammation was observed in the control teeth. Gram-positive micro-organisms were identified at the interface of restoration and cavity wall, or within the dentinal tubules in virtually all cases in which pulpal inflammation was observed.

Topics: Animals; Composite Resins; Dental Bonding; Dental Cavity Preparation; Dental Cements; Dental Leakage; Dental Pulp; Dentin; Ferrets; Glutaral; Gram-Positive Bacteria; Polymethacrylic Acids; Pulpitis; Resin Cements; Urethane

The presence of stainable bacteria under restorations and pulp reactions in 36 teeth restored in vivo with a modified Class II composite resin restoration with two different dentine treatment techniques were studied on three separate follow-up occasions (1-3, 7-10 and 28-32 days). Half of the cavities showed stainable bacteria at the cavity margins and bottoms. Teeth restored with method A (Gluma/Occlusin) showed significantly fewer restorations with stainable bacteria then teeth restored with method B (Life/Occlusin) (p less than 0.05). Significantly more restorations with detectable bacteria were found after 28-32 days and restorative method B (p less than 0.05). There were no differences in occurrence and grade of pulp inflammation for the different dentine treatment techniques and time periods.

Topics: Acid Etching, Dental; Bacteria; Calcium Hydroxide; Child; Chlorhexidine; Composite Resins; Dental Bonding; Dental Cavity Lining; Dental Leakage; Dental Polishing; Dental Pulp; Dental Restoration, Permanent; Dentin; Follow-Up Studies; Glutaral; Humans; Polymethacrylic Acids; Pulpitis; Urethane

Deep buccal cavities were cut in 72 incisors and canines in six young monkeys. The cavities were restored as follows: Group One: acid etching of the enamel followed by an intermediate layer of unfilled resin and a light-cured microfilled composite. Group Two: acid etching of the enamel followed by treatment of the dentin with Gluma Cleanser and Gluma Bond. The cavities were restored as in Group One. Group Three: same procedure as in Group Two except for application of a calcium hydroxide cement on the pulpal wall prior to acid etching. Pulp reactions, presence and location of bacteria were studied after 8 and 90 days. A significant association between presence of bacteria and moderate to severe inflammatory reactions were observed. Bacteria were only found in a very few cavities pretreated with Gluma Dentin Bond. In general, slight inflammatory changes prevailed in Groups Two and Three. When the pulpal wall was extremely thin a toxic effect of Gluma Dentin Bond was observed.

Topics: Adhesives; Aldehydes; Animals; Chlorocebus aethiops; Composite Resins; Dental Cavity Preparation; Dental Pulp; Dental Restoration, Permanent; Dentin; Glutaral; Polymethacrylic Acids; Pulpitis; Time Factors