title: Lactate dehydrogenase activity in periodontal ligament cells stored in different transport media.
abstract: BACKGROUND
  Maintaining viability of periodontal ligament cells is important after an avulsion injury occurs.
  
  
  OBJECTIVE
  This study examined cell death and compared different transport media at varying times. Lactate dehydrogenase (LD) measurements were made on root surfaces of extracted teeth for evaluating the results of breakdown and necrosis of periodontal ligament cells.
  
  
  METHODS
  Teeth were divided into three groups. Each was immersed in one of the following storage media: Hanks balanced salt solution, Custodiol solution (an organ storage medium), or sterile saline solution. I.D. measurements (an indicator of cell death) were made at 2, 6, 24, 72, and 168 hours after extraction.
  
  
  RESULTS
  When the LD levels were compared according to the time periods, a progressive increase of cell death was found to be statistically significant (p < 0.001). However, when the effects of both time periods and the kind of storage medium on the LD levels were examined, the LD levels of the saline solution storage medium were found to be significantly higher (p < 0.001) than that of the other two groups.
  
  
  CONCLUSIONS
  Both Hanks balanced salt solution and Custodiol appeared to be suitable transport media for maintaining cell viability, whereas saline solution was not.
authors.affiliation: Faculty of Dentistry, Department of Endodontics, Gazi University, Ankara, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Alaçam
authors.forename: G
authors.initials: G
authors.lastname: Görgül
authors.forename: H
authors.initials: H
authors.lastname: Omürlü
authors.forename: M
authors.initials: M
authors.lastname: Can
mesh_terms: D000704:Analysis of Variance; D016923:Cell Death; D002470:Cell Survival; D002648:Child; D005947:Glucose; D006801:Humans; D007552:Isotonic Solutions; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D008353:Mannitol; D010513:Periodontal Ligament / Q000166:cytology* / Q000201:enzymology; D011189:Potassium Chloride; D011343:Procaine; D011897:Random Allocation; D012965:Sodium Chloride; D014021:Tissue Preservation / Q000379:methods*
chemical_list: C039984:Bretschneider cardioplegic solution; C072670:Hanks Balanced Salt Solution; D007552:Isotonic Solutions; D008353:Mannitol; D012965:Sodium Chloride; D011343:Procaine; D011189:Potassium Chloride; D007770:L-Lactate Dehydrogenase; D005947:Glucose