بررسي آزمايشگاهي ريزنشت لبه اي دو ماه ترميم كننده موقت دندان (زونالين و زوليران ) به روش نفوذ رنگ

COMPARISON OF MARGINAL MICROLEAKAGE OF TWO TEMPORARY FILLING MATERIALS (ZOLIRAN & ZONALIN) BY DYE PENETRATION AN IN VI TR O STUDY

Introduction: The materials used for temporary filling of crown of teeth play an important role in sealing, prevention of underlying tissue contamination and prognosis of direct & indirect pulp capping. Similarly, they have an important role after endodontic treatment and before permanent restoration of the crown. Therefore, marginal microleakage of Zoliran (Iran made) and Zonalin (English made), two temporary restorative materials with a common base, Zinc-Oxide eugenol were studied and compared. Method of Study: In this study, 44 healthy extracted premolars were collected: and randomly divided into 4 groups; 2 groups each having 20 teeth for experimental study and two other groups each having 2 teeth as positive & negative control. ln the two experimental groups and the positive group, standard access cavities similar to dimensions of pulp were formed and temporarily repaired with 4 mm of either Zoliran or Zonalin. After thermocyling, all of the groups were immersed in l% methylene blue for 24 hours and marginal microleakages were measured using a 40x stereo microscope Results: The results of this study showed that marginal microleakage of Zoliran is higher than Zonalin and the t-test statistically showed a significant difference between microleakage of Zoliran and Zonalin (P=0.0001). Conclusion: As the microleakage of Zonalin was lower than Zoliran in this study, it is advisable to use this material for temporary or intermediate sealing of cavities.