Apical Microleakage of a Silicone Based Root Canal Sealer: an Electrochemical Study

Svrha: Elektrokemijskom metodom procijenilo se apikalno propuštanje materijala RoekoSeal Automix (RSA) za punjenje korijenskog kanala samostalno i u kombinaciji s gutaperkom. Materijali i metode: Pedeset i dva prednja maksilarna zuba podijeljena su u dvije skupine. U prvoj su korijenski kanali punjeni samo RSA-om, a u drugoj gutaperkom i RSA-om (n = 24 u svakoj skupini). Preostala četiri zuba služila su kao pozitivna i negativna kontrolna skupina. Eksperimentalna jedinica konstruirana je tako da je bila neprekidno spojena na izvor struje. Jedanpostotni kalijev jodid (KI) korišten je kao elektrolit te su zubi uronjeni u otopinu. Bakrene elektrode s provodnim kapacitetom od jednoga miliampera (mA) korištene su kao anode za zatvaranje strujnog kruga. Rezultati su se očitavali ukupno tri tjedna, jedanput na dan, digitalnim voltmetrom spojenim na eksperimentalnu jedinicu. Promjene u količini propuštanja u skupini procjenjivale su se svaki dan t-testom za ovisne uzorke, a razlika između dviju skupina analizirana je t-testom za neovisne uzorke. Rezultati: Razlika u apikalnom propuštanju između dviju eksperimentalnih skupina nije bila statistički značajna (p>0,05). U objema je zabilježeno značajno propuštanje u svim vremenskim intervalima (p<0,05). Zaključak: RoekoSeal Automix samostalno nije se razlikovao u propuštanju od gutaperke punjene njime. Također nije bio potpuno učinkovit u sprječavanju propuštanja.Objectives: To evaluate the apical leakage of the root canal fillings performed with RoekoSeal Automix (RSA) alone and in combined with gutta-percha electrochemically. Materials and methods: Fifty two maxillary anterior teeth were divided into two groups. In group 1, the root canals were filled with RSA alone and in group 2 the root canals were filled with gutta-percha and RSA (n=24 each group). The remaining 4 teeth were used for positive and negative control groups. An experimental cell was constructed which was connected with a constant current source. 1% potassium iodide (KI) solution was added to the cell as the electrolyte and the teeth were then immersed in this solution. Copper electrodes with 1 milliampere (mA) conductance capacity were used as anodes to complete the circuit. The results were read daily, with a digital voltmeter connected to the experimental cell, for a total of 21 days. The changes in amount of leakage from day to day within the groups were evaluated by a “t-test for dependent samples” and the difference between two groups was analyzed by “t-test for independent samples”. Results: The difference of apical leakage amount between two experimental groups was not statistically significant (p>0.05). Both groups showed significant leakage at all time periods (p