To Study The Efficacy Of Reciprocating Single File System And Multifile Rotary Systems In Elimination Of Root Canal Bacteria And Endotoxins

AIM: To study the efficacy of reciprocating single file system and multifile rotary systems in elimination of root canal bacteria and endotoxins. MATERIAL AND METHOD: Forty permanent single rooted mandibular premolars with straight canals inoculated with Escherichia Coli suspension for 21 days were selected for the study. Teeth were randomly divided into four groups (n=10) according to instrumentation system: Grp. A–Reciproc (VDW); Grp. B–WaveOne (Dentsply Maillefer); Grp. C–MTwo (VDW); and Grp. D–K3( Sybron Endo); Bacterial and endotoxin samples were collected with a sterile paper point before instrumentation  and after instrumentation. Culture methods estimated the colony-forming units (CFU) and the Limulus Amebocyte Lysate test was used for quantification of endotoxins. Results so obtained were calculated and statistically analysed.  RESULT: Results at S1 concluded that bacteria and endotoxins were found in all of the investigated root canals. After instrumentation all systems were associated with the significant reduction of the bacterial load and endotoxins respectively: Grp. A– Reciproc (88.25% and 89.10%); Grp. B– WaveOne (83.53% and 80.59%); Grp. C– MTwo(79.41% and 75.84%) and Grp. D– K3 (67% and 74.4%). Statistically no difference was found amongst the instrumentation systems regarding bacteria and endotoxin elimination (P <0.05).  CONCLUSION: The reciprocating single file, Reciproc and WaveOne were as effective as the multifile rotary systems for the eradication of bacteria and endotoxins from root canals

Prevalence of Development of Dental Pulp Calcifications in Molars following Orthodontic Treatment – A Clinical Retrospective Study

Aim: This study aims to find the prevalence of pulp calcifications and their correlations with age, gender, tooth type, dental arches, or their location in patients following orthodontic treatment. Materials and Methods: The sample comprised 150 patients (15–25 years) who underwent orthodontic treatment. Pre- and posttreatment panoramic radiographs were evaluated to detect pulp calcification. Pearson Chi-square test was used to investigate the associations between pulp calcification and gender, age, tooth type, dental arches, and their location. Results: The statistical analysis showed that pulp calcification increased significantly from 35.30% to 50% (P < 0.05). They were significantly higher in mandibular molars than in maxillary molars. Radicular and coronal calcifications were present concomitantly in maximum cases followed by radicular and coronal pulp calcification occurring independently. Conclusion: The results of this study showed that the number of dental pulp calcification increased significantly after orthodontic treatment