Tissue response to potential root-end filling materials in inflected root canals

1997 ◽  
Vol 30 (2) ◽  
pp. 102-114 ◽  
Author(s):  
B.S. CHONG ◽  
T. R. PITT FORD ◽  
S. P. KARIYAWASAM
Keyword(s):  
Tissue Response ◽  
Root Canals ◽  
Filling Materials

Tissue Reaction to Subcutaneous Implantation of SuperEBA (Reinforced Zinc Oxide Cement) Used as Root-End Filling Material: A Histological Study in Rats

2016 ◽  
Vol 695 ◽  
pp. 247-251
Author(s):  
Alexandru Andrei Iliescu ◽  
Cristian Marian Petcu ◽  
Ileana Cristiana Petcu ◽  
Irina Maria Gheorghiu ◽  
Andrei Iliescu ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Histological Study ◽  
Tissue Reaction ◽  
Tissue Response ◽  
Successful Outcome ◽  
Filling Material ◽  
Clinical Value ◽  
Filling Materials ◽  
Retrograde Filling ◽  
Specific Tissue

The retrograde filling is a critical step to a successful outcome of the endodontic surgery. Despite the progress in the technology of novel root-end filling materials, zinc oxide-eugenol cement superEBA is still preserving its clinical value on long-term basis. The study aimed to reconsider the tissue response to the initial irritating effect of this material. Silicon tubes filled with superEBA were subcutaneously implanted for 120 days in white Wistar rats which were afterwards sacrificed. The connective tissue surrounding the superEBA implants revealed fibroblast proliferation and a definite reparatory process without inflammatory reaction. A non-specific tissue healing in progress around the implants, without calcifications, necrosis, and apoptosis was also described after 4 months. SuperEBA proved on animal model that its cytotoxicity is reducing gradually in time until no adverse reaction is observed. The reduced content in eugenol compared to other surgical zinc oxide cements and the benefic effect of o-ethoxybenzoic acid are the support to reconsider SuperEBA as a biocompatible retrograde filling material.

scholarly journals Safety and Effectiveness of Additional Apical Preparation using a Rotary Heat-treated Nickel–Titanium file with Larger Diameter and Minimum Taper in Retreatment of Curved Root Canals

2021 ◽  
Author(s):  
Jader Camilo Pinto ◽  
Fernanda Ferrari Esteves Torres ◽  
Airton Oliveira Santos-Junior ◽  
Marco Antonio Hungaro Duarte ◽  
Juliane Maria Guerreiro-Tanomaru ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Continuous Wave ◽  
Cyclic Fatigue ◽  
Nickel Titanium ◽  
Filling Material ◽  
Root Canals ◽  
Filling Materials ◽  
Heat Treated ◽  
Before And After ◽  
Curved Root Canals

Abstract Objective The aim of this study was to investigate the effect of additional apical preparation using the ProDesign Logic (PDL) 50/.01 rotary heat-treated nickel–titanium (NiTi) file with a larger diameter and minimal taper for retreatment of curved root canals. Materials and Methods Mesial curved root canals of 12 mandibular molars were prepared using PDL 25/.06 and filled using the continuous wave of condensation technique and AH Plus sealer. After retreatment using ProDesign S (PDS) 25/.08, PDL 25/.06 and PDL 35/05, a complementary procedure was performed with PDL 50/.01. Microcomputed tomography (micro-CT) scanning was performed before and after retreatment procedures. The cyclic fatigue resistance of unused PDS 25/.08, PDL 25/.06, PDL 35/.05 and PDL 50/.01 instruments (n = 12) was evaluated in a stainless-steel device. Statistical Analysis Data on the volumes of the root canals and the remaining filling materials were submitted to the paired t-test. Cyclic fatigue resistance data was submitted to one-way ANOVA and Tukey’s tests (α = 0.05). Results Use of PDL 50/.01 decreased the remaining filling materials in the apical third (p < 0.05). The root canal volume was similar in the cervical and middle thirds before and after preparation using PDL 50/.01 (p > 0.05). PDL 50/.01 presented the highest cyclic fatigue resistance (p < 0.05). Conclusions Use of the PDL 50/.01 instrument as an additional apical preparation for retreatment of curved root canals improved filling material removal in the apical third, while maintaining the dentin in the cervical and middle thirds. In addition, PDL 50/.01 presented high-flexural resistance.

Study on Removal Effects of Filling Materials and Broken Files from Root Canals Using Pulsed Nd:YAG Laser

2000 ◽  
Vol 18 (1) ◽  
pp. 23-28 ◽  
Author(s):  
DA-GUANG YU ◽  
YUICHI KIMURA ◽  
YASUO TOMITA ◽  
YUKIO NAKAMURA ◽  
HARUJI WATANABE ◽  
...  
Keyword(s):  
Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser ◽  
Root Canals ◽  
Filling Materials

scholarly journals Influence of different auxiliary agents of biomechanical preparation in the filling of "artificially prepared" lateral canals

2005 ◽  
Vol 13 (2) ◽  
pp. 147-151 ◽  
Author(s):  
Daniela Ribeiro da Silva ◽  
Ivaldo Gomes de Moraes
Keyword(s):  
Penetration Rate ◽  
Hybrid Technique ◽  
Human Teeth ◽  
Root Canals ◽  
Filling Materials ◽  
Rotary Instruments ◽  
Significant Difference ◽  
Group A ◽  
Group B ◽  
Group D

The purpose of the present study was to evaluate the influence of some auxiliary agents of biomechanical preparation of the root canal on the filling of artificial lateral canals in extracted human teeth. A total of eighty single-rooted teeth were employed, which were submitted to preparation of three artificial lateral canals in one of the proximal aspects at the cervical, middle and apical thirds, besides one in the buccal aspect. The main canals were prepared by Profile 0.4 rotary instruments through the crown-down technique and irrigated with the irrigants investigated, as follows: Group A - 1% sodium hypochlorite and final irrigation with trisodium EDTA for 5 minutes; Group B - Endogel (2% chlorhexidine gel); Group C - Endo PTC and Dakin's solution and final irrigation with Tergentol- Furacin; and Group D - File Eze. The root canals were obturated by the Tagger's hybrid technique and then radiographed for assessment of the penetration rate of the filling materials in the lateral canals. Analysis of the results demonstrated no statistically significant difference (p<0.05) between the irrigants both to each other and as regards the location (thirds and aspects) of the artificial lateral canals.

Endodontic Materials

1988 ◽  
Vol 2 (1) ◽  
pp. 12-24 ◽  
Author(s):  
D. Ørstavik
Keyword(s):  
Scoring System ◽  
Clinical Performance ◽  
Inferior Alveolar Nerve ◽  
New Materials ◽  
Virtual Absence ◽  
Root Canals ◽  
Filling Materials ◽  
Clinical Complications ◽  
Biological Performance ◽  
Sealing Materials

Endodontic sealing materials for permanent obturation of root canals are highly variable both in chemistry of setting and in their additives. Conventional materials are based on zinc oxide-eugenol, rosin-chloroform, or synthetic resins. These have been extensively tested for biological and technical properties. Most materials are slightly or moderately cytotoxic, and some - notably paraformaldehyde-containing materials- have been associated with clinical complications such as paresthesia of the mental and/or inferior alveolar nerve. Recently, Ca(OH)2-containing materials have been introduced with claims of improved clinical and biological performance. However, there is little documentation of the alleged benefits of new materials. The virtual absence of comparative clinical studies on endodontic filling materials appears to be the major obstacle to critical assessment of old materials or to adequate documentation of new formulae. A recently introduced scoring system for the radiographic assessment of apical periodontitis may aid in the future testing of endodontic materials. Results with this scoring system on extensive clinical material indicate that it is possible to discriminate among endodontic materials with small differences in clinical performance.

Comparison of GPX with or without solvent and hand files in removing filling materials from root canals—An ex vivo study

2010 ◽  
Vol 110 (5) ◽  
pp. 675-680 ◽  
Author(s):  
Luciana Viti Betti ◽  
Clovis Monteiro Bramante ◽  
Ivaldo Gomes de Moraes ◽  
Norberti Bernardineli ◽  
Roberto Brandão Garcia
Keyword(s):  
Ex Vivo ◽  
Root Canals ◽  
Filling Materials ◽  
Ex Vivo Study

scholarly journals BIOMECHANICAL CHARACTERISITICS OF PULP REMOVA IN CASES OF PERIODONTAL DISASES

2017 ◽  
Vol 21 (2) ◽  
pp. 64-67
Author(s):  
V. R Shashmurina ◽  
L. I Devlikanova ◽  
E. N Chumachenko
Keyword(s):  
Bone Mineralization ◽  
Periodontal Diseases ◽  
Element Analysis ◽  
Root Canals ◽  
Filling Materials ◽  
Allowable Level ◽  
The Finite Element Analysis ◽  
Materials Used ◽  
Biomechanical Features ◽  
Pulp Removal

The state of extensive deformation of tooth-parodont system has been explored considering the stage of the alveolar crest bone resorption and anatomical consequences of tooth depulpation. The research involving mathematical simulation in combination with the finite element analysis and Schleicher-Nadai theory has stated that removal of single-rooted teeth caused by periodontal diseases does not increase the maximum allowable level of occlusal load in case of good bone mineralization. Provided depulpation is inevitable, periodontal tissue should either not be substituted with fibrious tissue or replaced with one third intra alveolar length. Biomechanical features imply a varied choice of methods and tooth filling materials used for filling root canals as well as revision of parodontogram rates in terms of periodont changes after pulp removal.

scholarly journals Antimicrobial activity of root canal filling materials

2021 ◽  
Vol 7 (1) ◽  
pp. 01-05
Author(s):  
Jikia Maia
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Zinc Oxide ◽  
Antimicrobial Properties ◽  
Root Canal Filling ◽  
Root Canals ◽  
Filling Materials ◽  
Zinc Oxide Eugenol ◽  
Test Culture

The antimicrobial activity of filling materials was studied to improve the quality of treatment of complicated caries in vitro. Resorcin-formalin cement Resodont (“Latus”, Ukraine) - № 1; Endocort zinc oxide-eugenol cement (“Latus”, Ukraine) - No. 2; materials based on zinc oxide eugenol cement with dexamethasone: Endomethasone ivory (Septodont, France) - No. 3 and Endofil ("Produit Dentaires SA", Switzerland) - No. 4. To assess the antimicrobial activity of the studied materials, test microorganism strains were used: Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 6783, Candida albicans ATCC 885-653. As a result of the study, it was established that filling materials have different antimicrobial activity. Resodont has the greatest antimicrobial activity on the test culture. Endomethason is active in relation to the test cultures studied, inferior to Resodont in its antimicrobial properties. Endocort and Endofil have less antimicrobial activity than Resodont and Endomethason, but have approximately equal growth retardation rates. It should be noted that with respect to Staphylococcus aureus, Endocort was found to be almost 1.5 times more active than Endofil. The conducted studies confirm that the materials for filling of root canals by Resodont and Endocort (Latus, Ukraine) have a pronounced antibacterial effect. They are competitive with foreign sealers and are the materials of choice, having a significantly lower cost.

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