Buğra Güler

Effect of intracanal cryotherapy on pain after single‐visit root canal treatment

The purpose of this study was to evaluate the effect of 2.5°C cold saline irrigation as final irrigant on postoperative pain after single-visit root canal treatment of teeth with vital pulps. One-hundred and seventy patients were assessed as eligible and included to the study. The teeth were randomly divided into two groups (n = 85) (i.e. the control group and the cryotherapy group). In the cryotherapy group, final irrigation with 2.5°C 0.9% physiological saline solution for 5 min was performed following completion of biomechanical preparation, whereas in control group same solution stored at the root temperature was used. Treatments were performed in a single visit. Participants were asked to rate the intensity of their postoperative pain using visual analogue scale at 24 and 48 h. Data were analysed by Mann-Whitney U test and Students t test. In the cryotherapy group level of reported postoperative pain was significantly lower than the control group (P < 0.05, Mann-Whitney U test). The outcome of this investigation indicates that 2.5°C cold saline irrigation as final irrigant can result a significant reduction in postoperative pain levels in comparison to the control group. Cryotherapy is a simple, cost-effective, and non-toxic option for postoperative pain control in single visit root canal treatment.

Scanning electron microscopy with energy dispersive X-ray spectrophotometry analysis of reciprocating and continuous rotary nickel-titanium instruments following root canal retreatment

This study aimed to evaluate superficial defects and the composition of Reciproc R25 and ProTaper Retreatment file systems (Dentsply Maillefer, Ballaigues, Switzerland) used for retreatment. A total of 100 maxillary incisor teeth were randomly divided into the following two groups: Reciproc R25 (n = 25) and ProTaper Retreatment instrument (n = 75) groups. The nickel-titanium (Ni-Ti) compositions of the files before and after use were analyzed using energy dispersive X-ray spectrophotometry (EDX). Chi-square, Mann-Whitney U, and Kruskal-Wallis tests were used to analyze the data. ProTaper Retreatment instrument group showed a significantly higher number of defects than the Reciproc group (P < 0.05). No instrument fracture was detected. The presence of debris was observed in both groups before use, although the level was significantly higher in the ProTaper Retreatment group, which consisted of metals (P < 0.05). There was no significant difference between new and used instruments with regard to Ni-Ti composition (P < 0.05). EDX analysis showed that both the Reciproc and ProTaper Retreatment instruments had a Ni-Ti composition that was within the standards specified by the American Society of Testing and Materials. This study confirmed the use of both the Reciproc R25 file and ProTaper Retreatment file system for root canal filling removal in straight root canals as a safe procedure. (J Oral Sci 58, 401-406, 2016).

Apical extrusion of debris using reciprocating files and rotary instrumentation systems

Background: To compare the preparation time and amount of apically extruded debris after the preparation of root canals in extracted human teeth using the reciprocating files and rotary nickel-titanium systems. Procedure: Sixty extracted human mandibular premolars were used. The root canals were instrumented using reciprocating (WaveOne, Reciproc, SafeSider) or rotary motion (Typhoon, ProTaper Universal, Mtwo), and the debris produced was collected in glass vials. The remaining debris was assessed using a microbalance and statistically analyzed using the one-way ANOVA and Duncan multiple range tests at a significance level of P < 0.05. The time required to prepare the canals with different instruments was also recorded. Results: The Reciproc group produced significantly less debris when compared to the Typhoon group (P < 0.05), and instrumentation with the single-file systems was significantly faster than in the multi-file systems (P < 0.05). The WaveOne group extruded significantly more debris per unit of time than the other groups, with the exception of the Typhoon group (P < 0.05). Conclusion: According to our study, all systems caused apical debris extrusion. However, the Reciproc group was associated with less debris extrusion when compared to the other groups.

MANAGEMENT OF DENS INVAGINATUS TYPE II WITH PERIAPICAL LESION: CASE REPORT

Dens invaginatus is a developmental anomaly resulting from epithelial invagination of the tooth crown before calcification. Endodontic treatment of teeth affected by dens invaginatusmay be difficult and complex due to aberrant anatomy. Combined orthograde and surgical approaches for successful treatment of dens invaginatus are effective. This report describes the successful treatmentand results atthe 12-month follow-up of a maxillary lateral incisor showing dens invaginatus type II, a large periapical lesion and an open apex by using combined surgical and endodontic treatment.

ENDODONTİDE FLARE-UP’IN ÖNLENMESİ VE TEDAVİSİ

OZET Agri ve agri korkusu hasta ve hekim iliskisinin ciddi problemlerinden birisidir. Endodontik tedavi sirasinda veya sonrasinda meydana gelen agri sikâyetlerinin azaltilmasi icin cesitli tedavi sekilleri ve onlemler mevcuttur. Bu tedavi sekilleri, disin okluzyondan dusurulmesi, premedikasyon, drenajin saglanmasi, kanal ici ve sistemik medikament islemlerini icermektedir. Bu derlemede, flare-up meydana geldiginde hastanin nasil yonetilmesi gerektiginin ve flare-up’in onlenmesi ve tedavisi icin neler yapilabileceginin anlatilmasi amaclanmaktadir. Anahtar Sozcuk: Akut alevlenme, kok kanal tedavisi, endodonti PREVENTION AND TREATMENT OF ENDODONTIC FLARE-UP’S ABSTRACT The one of major problems between patient and the clinician is pain associated with endodontic procedure. Various treatment regimens for the relief of pain during endodontic procedure, including relief of occlusion premedication, establishment of drainage, and intracanal and systemic medications are presented. The aim of this review is to describe the procedures of preventing and management of endodontic flare-ups. Keywords: Acute execerbation, root canal treatment, endodontics

Oral lichenoid contact lesion to amalgam restoration: a case report

Amalgam has been used for nearly 150 years in dentistry and it is still being used because of advantages such as low cost, ease of handling, physical characteristics like diversity in applications and low frequency of local and systemic biological side effects. On the other hand the disadvantages of dental amalgam comprise poor aesthetics, local degradation, occasional allergic responses to some of its components or degradation products, and the toxicity of mercury. Amalgam and/or its components may cause a type IV hypersensitivity reactions on the oral mucosa. Most patients with oral lichen planus (OLP) have no evidence of any association with dental restorative materials. However, contact or proximity to restorations involving amalgam or other materials causes some lichenoid reactions that is to say, lesions that clinically and histologically resemble lichen planus (LP), but have an identifiable etiology. These reactions are presumably due to allergic or toxic reactions to compounds released or generated. The present case report presents a patient with a unilateral oral lichenoid reactions (OLRs) to an amalgam restoration in the right mandibular molar region.

Sewing needle in a root canal: a case report

Abstract Foreign bodies in root canals are rarely seen, and usually objects are accidently lodged and broken in root canals by the patients themselves. The occurrence of a foreign body, such as a metal screw, staple pin, sewing needle,

Antimicrobial efficacy of MTAD, sodium hypochlorite and chlorhexidine on rapid disinfection of gutta-percha cones -

Objective: The aim of this study was to compare the disinfection efficacy of various disinfectants on gutta-percha root canal filling materials. Methods: Three-hundred and seventy standard #80 gutta-percha cones were used for the study. The gutta-percha cones were sterilized with ethylene oxide. Ten cones were separated for negative control group. Then the gutta-percha cones were randomly divided into four groups containing 90 points each and contaminated with Escherichia coli, Enterococcus faecalis, Candida albicans and Streptococcus mutans. Specimens were incubated in 10 ml Brain Heart Infusion Broth at 37°C for 72 h. After incubation, cones were dried with sterile gauze; ten of the cones from each group were seperated for positive control groups and rest of the cones were divided into four subgroups according to the chemical disinfectant used (n = 80 each): 5.25% sodium hypochlorite (NaOCl); 2% chlorhexidine gluconate (CHX); 10% povidone iodine (PI); and MTAD groups. For each subgroup, the gutta-percha cones were immersed into the disinfectant for 1 and 10 min individually. In plates showing growth, the number of colony forming units were counted. Results: NaOCl, CHX and MTAD were equally effective on tested microorganisms. Conclusion: 5.25% NaOCl, 2% CHX, and MTAD are effective agents for a rapid high disinfection level of gutta-percha cones.