"Biological study for evaluation of two types of soft denture lining materials"

ABSTRACT

Thirty completely edentulous male subjects, with no previous denture experience, participated in this study. The patients were divided into three groups. The maxillary dentures of group 1 [The control group] as well as the lower dentures of all groups, were constructed from conventional heat-cured acrylic resin. On the other hand, the maxillary dentures of groups II, III were lined with resilient lining inaterials super- soft for group II, and soft liner for group ill. Before denture Insertion, the palatal mucosa of all patients was sampled using the swab culture technique, to detect the presence of Candida albicans. One month, three months and six months after denture adjustment, the fitting surface of the maxillary dentures was similarly sampled using the same culture technique. The models were cultured at 37[degree]c for 48 hours after which the resulting colonies were counted and C. albicans was identified by Germ tube test and API 20C AUX Yeast Identification System. Each time the maxillary dentures were sampled, the clinical appearance. of the palatal denture bearing mucosa and the condition of the resilient denture liners were assessed. The results obtained from this study deduced that super- soft lining material has a less affinity to C. albicans colonization, the best color stability and the least frequency of inflammatory reactions of the underlying mucosa, compared to soft liner lining material. Conventional heat-cured acrylic resin has the least affinity to C. albicans colonization