Pulpal response in dongs to a glass ionomer cement restorative material (ASPA) in lined and unlined cavities
OA Version
Citation
Abstract
Recently the Claudius Ash Co. has marketed a glass ionomer cement restorative material (ASPA) for use ln the restoration of Class V erosive lesions. It is claimed that this material is adhesive to enamel and dentin and cleaning of the area with a 50% citric acid solution for 30 seconds prior to restoration is recommended. There are however no published reports of the histopathological compatibility of this material in animals or humans. In keeping with the need for biocompatability of dental materials a clinical study was undertaken.
A total of sixty-four buccal Class V cavity preparations were prepared in incisor and premolar teeth of four dogs approximately two years of age. The preparations were of four cavity depths and a calcium hydroxide liner was used in one of the deep categories. In addition, acid
preconditioning was done to twenty-four teeth prior to restoration. Sixteen teeth were prepared per dog and a quadrant of four teeth in each arch were restored with either the control or experimental material. A poly-carboxylate cement, Poly-F, was used as the control material. Thus, contralateral quadrants of four teeth in each arch were similar in depth and sequence of cavity preparation, presence of acid preconditioning, and experimental period. The only difference was that one quadrant was restored with ASPA and the other with Poly-F.
After an experimental period of either 10 or 21 days the animals were sacrificed and the teeth were subjected to histologic analysis. The method of evaluation was the one advocated by Stanley, Swerdlow and others.
The results indicate that both ASPA and Poly-F are biocompatible. Both materials are similar in their histopathological response ln dogs. ASPA appears to be slightly more acceptable to the dental pulp than Poly-F. It is recommended that a calcium hydroxide liner be placed ln all cases where the acid cavity cleaner is used. Furthermore, a calcium hydroxide base should be used in all deep preparations prior to placement of ASPA regardless if acid preconditioning preceeds restoration.
Description
Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1977 (Pedodontics)
Includes bibliography.
Includes bibliography.
License
This work is being made available in OpenBU by permission of its author, and is available for research purposes only. All rights are reserved to the author.