Remaining root dentin thickness in mesiobuccal canals of maxillary first molars after attempted removal of broken instrument fragments

2015 ◽  
Vol 41 (3) ◽  
pp. 122-127 ◽  
Author(s):  
Yuan Gao ◽  
Ya Shen ◽  
Xuedong Zhou ◽  
Markus Haapasalo
Keyword(s):  
Root Dentin ◽  
Dentin Thickness

scholarly journals [NO TITLE AVAILABLE]

2007 ◽  
Vol 18 (4) ◽  
pp. 289-293 ◽  
Author(s):  
Orlando Limongi ◽  
Diana Santana de Albuquerque ◽  
Flares Baratto Filho ◽  
José Roberto Vanni ◽  
Elias P. Motcy de Oliveira ◽  
...  
Keyword(s):  
Root Canal ◽  
Multislice Ct ◽  
In Vitro Study ◽  
Ct Scanner ◽  
Root Canals ◽  
Group I ◽  
Working Length ◽  
Root Dentin ◽  
Dentin Thickness

This in vitro study compared, using computed tomography (CT), the amount of dentin removed from root canal walls by manual and mechanical rotary instrumentation techniques. Forty mandibular incisors with dental crown and a single canal were selected. The teeth were randomly assigned to two groups, according to the technique used for root canal preparation: Group I - manual instrumentation with stainless steel files; Group II - mechanical instrumentation with RaCe rotary nickel-titanium instruments. In each tooth, root dentin thickness of the buccal, lingual, mesial and distal surfaces in the apical, middle and cervical thirds of the canal was measured (in mm) using a multislice CT scanner (Siemens Emotion, Duo). Data were stored in the SPSS v. 11.5 and SigmaPlot 2001 v. 7.101 softwares. After crown opening, working length was determined, root canals were instrumented and new CT scans were taken for assessment of root dentin thickness. Pre- and post-instrumentation data were compared and analyzed statistically by ANOVA and Tukey's post-hoc test for significant differences (p=0.05). Based on the findings of this study, it may be concluded that regarding dentin removal from root canal walls during instrumentation, neither of the techniques can be considered more effective than the other.

scholarly journals Concentrated Growth Factor: A Novel Platelet Concentrate for Revascularization of Immature Permanent Teeth—A Report of Two Cases

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
M. S. Nivedhitha ◽  
Benoy Jacob ◽  
Aishwarya Ranganath
Keyword(s):  
Growth Factor ◽  
Mineral Trioxide Aggregate ◽  
Stage Iv ◽  
Platelet Concentrate ◽  
Permanent Teeth ◽  
Old Patients ◽  
Regenerative Endodontics ◽  
Patient Consent ◽  
Root Dentin ◽  
Dentin Thickness

This article elucidates the utilization of a novel platelet concentrate-concentrated growth factor (CGF) for rapid and successful healing outcome in regenerative endodontics. This case report focusses on two cases: 23-year-old and 21-year-old patients with incomplete root formation and periapical lesion. Case 1 and case 2 are classified as stage IV and stage II, respectively, in accordance with Cvek’s classification of open apex and had varied outcomes. The extent of open apex, root dentin thickness, and lesion were assessed using periapical radiograph and CBCT. Revascularization procedure was carried out after obtaining patient consent. Following bleeding induction, CGF was prepared, placed, and condensed using pluggers in the root canal space, followed by the placement of mineral trioxide aggregate (MTA) up to the level of CEJ. At 1-year follow-up, apical closure with increased root dentin thickness and reduced periapical radiolucency was evident.

scholarly journals Residual root dentin thickness for three different rotary systems: A comparative cone beam computed tomography in vitro study

2020 ◽  
Vol 38 (1) ◽  
pp. 48
Author(s):  
MatamGlore Suneetha ◽  
AhmedAbdul Moiz ◽  
Hateem Sharief ◽  
Kalyani Yedla ◽  
MubashirMirza Baig ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
In Vitro Study ◽  
Vitro Study ◽  
Cone Beam ◽  
Root Dentin ◽  
Dentin Thickness

Correlation of Root Dentin Thickness and Length of Roots in Mesial Roots of Mandibular Molars

2014 ◽  
Vol 40 (9) ◽  
pp. 1435-1438 ◽  
Author(s):  
Shweta Dwivedi ◽  
Chandra Dhar Dwivedi ◽  
Neelam Mittal
Keyword(s):  
Mandibular Molars ◽  
Root Dentin ◽  
Dentin Thickness

scholarly journals Impact of Root Dentin Thickness on the in vitro Compressive Strength of Teeth treated with Recent Post and Core Systems

2017 ◽  
Vol 18 (11) ◽  
pp. 1065-1070 ◽  
Author(s):  
Sahil Mogla ◽  
Amit Bhagat ◽  
Litik Mittal ◽  
Tawanpreet Kaur ◽  
Munish Dheeraj ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Glass Fiber ◽  
Analysis Of Variance ◽  
Fiber Post ◽  
Glass Fiber Post ◽  
Root Dentin ◽  
Post And Core ◽  
Post Space ◽  
Dentin Thickness

ABSTRACT Introduction Endodontically treated teeth dry with time, and its dentin undergoes changes making the teeth brittle and friable. The main function of a post is to strengthen or reinforce a weakened root. However, doing a post and core frequently requires the removal of sound tooth tissue. Recent materials introduced in the market for post and cores have been promising. Aim The aim of this study is to evaluate the fracture resistance of endodontically treated extracted permanent teeth with variable remaining root dentin thickness after post space preparation. Materials and methods A total of 270 freshly extracted permanent maxillary central incisors with fully formed apices were selected, decoronated at cementoenamel junction, and divided into three main groups according to remaining root dentin thickness, determined using a Vernier caliper into 0.5, 1, and 1.50 mm after post space preparation. Each group was further divided into three subgroups (subgroup a: Custom-made cobalt–chromium alloy post and core; subgroup b: Prefabricated glass fiber post and composite core; and subgroup c: EverStick fiber post). Each specimen was subjected to compressive load using universal testing machine. The force required to fracture was recorded and data were analyzed using analysis of variance (ANOVA) test. Results Analysis of variance revealed that compressive strength of the tooth is significantly affected by the increase in the remaining dentin thickness after post space preparation (p < 0.05). Furthermore, teeth with custom fabricated posts showed a significantly higher compressive strength (p < 0.05) than prefabricated glass fiber post and EverStick fiber post groups except the group with minimum remaining dentin thickness. Conclusion The present in vitro study revealed that compressive strength of the post and core systems is directly related to the amount of healthy remaining dentin thickness. Hence, efforts to maximize the preservation of natural dentin should be taken during post space preparation. How to cite this article Bhagat A, Mittal L, Mogla S, Kaur T, Dheeraj M, Marwah G. Impact of Root Dentin Thickness on the in vitro Compressive Strength of Teeth treated with Recent Post and Core Systems. J Contemp Dent Pract 2017;18(11):1065-1070.

Retrieval of fractured Endodontic Instrument under dental operating microscope using ultrasonic tips : A Case Report

2020 ◽  
Vol 11 (3) ◽  
pp. 3316-3321
Author(s):  
Samrudhi Khatod ◽  
Anuja Ikhar ◽  
Pradnya Nikhade ◽  
Manoj chandak
Keyword(s):  
Case Report ◽  
Root Canal ◽  
Fracture Resistance ◽  
Root Canal Treatment ◽  
Operating Microscope ◽  
Severe Loss ◽  
Mechanical Procedure ◽  
Root Dentin ◽  
Fracture Level

A Patient came with the complaint of pain in the lower right back region of the jaw. Root canal treatment was planned. While preparing for the bio-mechanical procedure, the Hand pro taper fractured in the apical third. Iatrogenic occurred as a result of the fracture of the endodontic instrument. Retrieval of the fractured instrument was planned to complete the cleaning and shaping of the canal. The removal of the fractured instrument was planned to be done under the Dental Operating Microscope. The use of an operating microscope enhanced the illumination and the magnification of the instrument. This illumination and magnification helped in the precision of removal. The ultrasonic tip enabled to reach of the fractured instrument in the canal and loosen the dentin around the fractured instrument. It allowed easy retrieval of the fractured instrument. During the retrieval procedure, the fractured instrument was bypassed before the use of the ultrasonic tip. After the removal of the fractured instrument, cleaning and shaping were completed, followed by obturation, definitive restoration, and prosthesis. As the removal of the fractured instrument enabled complete cleaning and shaping, it improved the prognosis of the case. When the endodontic instrument gets fractured, it should be analyzed over the radiograph to assess the fracture level, the anatomy of the root canal, size of the fractured instrument, check accessibility, stage of fracture, etc. If all the above criteria are met with the removal of the instrument only then, replacement should be tried. Otherwise, it may lead to a severe loss of root dentin, decreasing fracture resistance of the root.

Effect of different irrigation regimens on smear layer removal in human root dentin an in-vitro study

2017 ◽  
Vol 4 (2) ◽  
pp. 31-37
Author(s):  
Neha S ◽  
◽  
Khurramuddin. M ◽  
Shekar K ◽  
Binoy Dola ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Smear Layer ◽  
Vitro Study ◽  
Layer Removal ◽  
Root Dentin

A new method to test the fracture strength of endodontically-treated root dentin

2021 ◽  
Vol 37 (5) ◽  
pp. 796-804
Author(s):  
Haiping Xu ◽  
Ning Ye ◽  
Fei Lin ◽  
Young Cheul Heo ◽  
Alex S.L. Fok
Keyword(s):  
Fracture Strength ◽  
New Method ◽  
Root Dentin
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