LAUSR

Background and Purpose of the Study: Two of the most critical factors affecting the prognosis of an avulsed tooth after replantation are extraoral dry time and the storage medium in which the tooth was placed before treatment could be rendered. The ability of a storage medium to support cell viability of the periodontal ligament (PDL) can be an important factor in the prognosis, and thus, the aim of this study was to evaluate the efficacy of commonly available storage media. Materials and Methods: Cultured PDL cells of sixty freshly extracted human teeth were randomly divided into four groups of 15 each, Group I: Electral solution, Group II: Ringer's lactate, Group III: Oral rehydration salt liquid (ORS-L), and Group IV: Coconut water. Samples in each group were further divided into three subgroups depending on the time duration they were placed in the storage medium, i.e., 1, 4, and 8 h. Further these samples were subjected to Collagenase assay, the cells were stained with trypan blue and viable PDL cells were counted under light microscope. Results: Statistical analysis showed that Group II demonstrated significantly (P < 0.001) more viable PDL cells in than Groups IV and I, least viable PDL cells are seen with Group III samples. Conclusion: Ringer's lactate maintained highest PDL cell viability followed by coconut water, electoral solution, and ORS-L at various time intervals. More studies with large samples are required to prove the efficacy of Ringer's lactate as viable storage media.