ISSN:
1365-2842
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
Notes:
A recently marketed direct filling resin, Isosite, does not have an inorganic filler. This material is offered as a hand-mixed, two-paste system (Isopast) and is also available in capsulated form and as an ultraviolet activated sytem. Since it is well known that direct filling resins used hitherto are capable of causing pulpal irritation, especially in deep cavities, the pulpal response to Isopast was investigated. The experimental animals were twenty-four vervet monkeys (Cercopithecus aethiops). Under general anaesthesia a labial cavity was cut in each of the eight incisor teeth (maxillary and mandibular) of each animal. In each animal two cavities were filled with unlined Isopast, two with Isopast over a lining of calcium hydroxide cement, two with silicate cement and two with zinc oxide/eugenol cement. The animals were killed at intervals of 2, 28 and 56 days. The teeth recovered were decalcified and stained for histological examination. Of the total of 192 specimens sixty-five were discarded, two because of accidental pulpal exposure, one because of leakage and sixy-three because of technical defects in the preparation of the material, leaving 126 specimens available for assessment. This was done independently by three examiners who did not know which materials had elicited the reactions observed. It was found that after 2 days unlined Isopast caused more pulpal disturbance than other materials. After 28 and 56 day intervals lined Isopast caused less disturbance than the other materials. The maker's recommendation that linings should be used is confirmed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2842.1980.tb01456.x
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