title: Addition of L-dopa to HBSS in enhancing the maintenance of cell viability of Periodontal Ligament (PDL) cells: An In-Vitro Study.
abstract: OBJECTIVE
  To investigate the viability of PDL cells in an avulsed tooth using a storage medium with and without L-dopa.
  
  
  METHODS
  Twenty freshly extracted non-impacted human teeth with closed apices and no caries beyond the CEJ were obtained for this study. The teeth were then randomly divided into 1 of the 4 experimental storage solution groups, namely group 1: deionized water; group 2: deionized water with L-dopa (1μg/μl); group 3: HBSS; and group 4: HBSS with L-dopa (1μg/μl). After storing the teeth in different test solutions for 45 minutes collagenase assay was performed and the number of viable PDL cells were counted under a light microscope using a hemocytometer at 20X magnification.
  
  
  RESULTS
  The mean number of viable PDL cells was highest in group 4, followed by group 3 and group 2. Group 1 shows the least number of viable PDL cells.
  
  
  CONCLUSIONS
  The synergistic effect of L-dopa and HBSS paves way for its usage as an effective storage medium for an avulsed tooth.
authors.affiliation: Professor, Department of Conservative Dentistry & Endodontics, Madha Dental College , Chennai, India .
authors.forename: A V Rajesh
authors.initials: AV
authors.lastname: Ebenezar
authors.affiliation: Postgraduate Student Formerly, Department of Conservative Dentistry & Endodontics, SRM Dental College , Chennai, India .
authors.forename: Mahendran
authors.initials: M
authors.lastname: T
authors.affiliation: Postgraduate Student Formerly, Department of Conservative Dentistry & Endodontics, SRM Dental College , Chennai, India .
authors.forename: Janani
authors.initials: J
authors.lastname: Priya
keywords: Avulsed tooth; Cell viability; HBSS; L-dopa; Storage medium