“…In clinical studies of the material used in a variety of situations there were no adverse reports from patients following the use of glass ionomer cement (Osborne et aL, 1985;Knibbs, 1986;Knibbs, Plant & Pearson, 1986a;Knibbs, Plant & Shovelton, 1986c;Knibbs & Plant, 1986), There were several reports of previous patient symptoms from sensitive cervical lesions being improved or completely alleviated by the use of a glass ionomer restorative (Mount & Makinson, 1978;Charbeneau & Bozell, 1979;Lawrence, 1979;Low, 1981;Brandau, Ziemiecki & Charbeneau, 1984), Low (1981) noted 90% total relief and 6% partial relief of such symptoms in his study of sensitive cervical lesions, and that placement of the material was often possible without a local anaesthetic. The only case where no improvement was noted was one where the restorations had been lost, Brandau et al (1984) noted that relief of cervical sensitivity lasted over a 4'/2-year period in their study, McLean & Wilson (1977b) noticed no evidence of pulp death in their clinical trial of glass ionomer to treat cervical abrasions.…”