Evaluation of radicular dentin remaining and risk of perforation after manual and rotary instrumentations in root canals of primary teeth: Anin vitrostudy

2016 ◽  
Vol 4 (3) ◽  
pp. 57 ◽  
Author(s):  
Mohammed Zameer
Keyword(s):  
Primary Teeth ◽  
Root Canals

The role of intracanal medicaments in inhibition of bacteria isolated from root canals of infected primary molars

2019 ◽  
Vol 14 (1) ◽  
pp. 92
Author(s):  
Dr. Maha Abdul- Kareem Mahmood ◽  
Dr. Huda Elias Ali ◽  
Dr. Haraa Khairi Abdul-Kadher
Keyword(s):  
Antimicrobial Activity ◽  
Streptococcus Mutans ◽  
Normal Saline ◽  
Root Canal ◽  
Primary Teeth ◽  
Primary Molars ◽  
Root Canals ◽  
Etiologic Agents ◽  
Micro Organisms

Microbes are considered as the primary etiologic agents in endodontic diseases.Disinfection of the root canal is obtained by the combined effect of biomechanicalpreparation, irrigation and intra canal medicament. The aim of the present study wasto assess the antimicrobial activity of intracanal medicaments (formocresol andEndosepton) against two micro organisms (Streptococcus mutans and staphylococcusaureus) isolated from 15 necrotic pulps of primary molars indicated for pulpectomyprocedure. The samples were cultured, and purified using microbiological evaluation.Broth dilution test was performed in our study by preparing test tubes containing10 ml of BHI broth (pH. 7) which then inoculated with strains of the tested bacteriaand incubated at 37 C° for 24 h. After over night incubaction, ten fold dilution weremade in test tubes containing 9 ml of normal saline by adding 1 ml of the inoculum tothe first tube . Then from dilution 10-1 , 0.1 ml of cell suspension was added to 9.9 mlof formocresol and endosepton, then 0.1 ml was taken and spread on duplicates ofBHI agar plates at different intervals and incubated aerobically for 24 h. at 37 C°.Colonies on the plates were counted after incubation and CFU/mL (colony formingunit) was calculated. Our results indicating that there were no significant differencesbetween the intracanal medicaments, but there were high significant differencesbetween the intervals time of the study. We concluded that both materials had greatantibacterial effect against the pathogens commonly isolated from necrotic pulpaltissue of primary teeth.

Comparative Analysis of Root Dentin Morphology and Structure of Human Versus Bovine Primary Teeth

2015 ◽  
Vol 21 (3) ◽  
pp. 689-694 ◽  
Author(s):  
Bruna M. Costa ◽  
Alexsandra S. Iwamoto ◽  
Regina M. Puppin-Rontani ◽  
Fernanda M. Pascon
Keyword(s):  
Repeated Measures ◽  
Primary Teeth ◽  
Primary Root ◽  
Repeated Measures Anova ◽  
Root Canals ◽  
Morphology And Structure ◽  
Root Dentin ◽  
Dentin Tubules ◽  
Morphological Differences ◽  
Scanning Electron

AbstractThis study evaluated the structural and morphological differences between human and bovine primary root canals. Primary human maxillary central incisors (H) (n=9) and primary bovine incisors (B) (n=9) were selected. The roots were sectioned in the vestibular-lingual direction, planed and delimited in cervical, middle, and apical thirds. Tubule density (number of tubules per mm2) and diameter were analyzed by scanning electron microscopy (1,000 and 5,000×) using Image J 1.47 software. Data were submitted to two-way repeated measures ANOVA and Tukey tests (α=0.05). The highest tubule density was observed for B (28.527±1.717 mm2) compared with H (15.931±0.170 mm2) (p<0.01). Regarding root thirds, the cervical third presented a greater tubule density (26.417±11.654 mm2) than the apical third (17.999±5.873 mm2). The diameter of the dentin tubules was not different for cervical (3.50±0.08 µm), middle (3.45±0.30 µm) and apical thirds (3.42±0.33 µm) and substrate (H—3.29±0.14 µm; B—3.63±0.06 µm). It could be concluded that: (1) the radicular dentin structure of human and bovine primary teeth and root thirds differ in terms of the tubule density; (2) the radicular dentin morphology of human and bovine primary teeth and root thirds are similar in terms of the diameter of the dentin tubules.

Effect of Calcium Hydroxide as a Root Canal Dressing Material on Dentin Fracture Strength In Primary Teeth–In Vitro Study

2018 ◽  
Vol 42 (2) ◽  
pp. 146-149
Author(s):  
Fadi Said ◽  
Moti Moskovitz
Keyword(s):  
Calcium Hydroxide ◽  
Fracture Strength ◽  
Root Canal ◽  
Primary Teeth ◽  
In Vitro Study ◽  
Vitro Study ◽  
Root Canal Treatment ◽  
Root Canals ◽  
Anterior Teeth

Objectives: The aim of the present study was to assess the effect of calcium hydroxide as a root canal dressing material on dentin microtensile fracture strength in human primary teeth in vitro. Study design: Thirty primary anterior teeth with root canals packed with calcium hydroxide were divided into groups of ten and immersed in saline at room temperature for 7, 30 and 90 days. Ten teeth with root canals filled with sterile saline were the control group. Microtensile fracture strength was measured in Mechanical tester Lloyd testing machine. Results: There was a significant difference (P &lt; 0.05) between the fracture strength of the calcium hydroxide-filled teeth after 90 days (19.1 MPa) compared with the control (35.8 MPa). Dentin microtensile fracture strength of the calcium hydroxide-filled teeth decreased at an average of 0.142 MPa per day. Conclusion: Calcium hydroxide placed in root canals for an extended time had a significantly negative effect on root strength. Long-term success of root canal treatment in primary anterior teeth is estimated as 65% with most of the failures result from trauma recurrence. Clinical Relevance: Our results stress the need to evaluate the pros and cons of root canal treatment compared to extractions of non-vital primary incisors.

scholarly journals Extrusion of Debris from Primary Molar Root Canals following Instrumentation with Traditional and New File Systems

2017 ◽  
Vol 18 (11) ◽  
pp. 1040-1044 ◽  
Author(s):  
Bhagyashree Thakur ◽  
Ajinkya M Pawar ◽  
Anda Kfir ◽  
Prasanna Neelakantan
Keyword(s):  
Primary Teeth ◽  
File Systems ◽  
Primary Molar ◽  
Group Iii ◽  
Root Canals ◽  
Group I ◽  
Significant Difference ◽  
Molar Teeth ◽  
Post Hoc ◽  
Root Canal Instrumentation

ABSTRACT Introduction To assess the amount of debris extruded apically during instrumentation of distal canals of extracted primary molars by three instrument systems [ProTaper Universal (PTU), ProTaper NEXT (PTN), and self-adjusting file (SAF)] compared with conventional stainless steel hand K-files (HF, control). Materials and methods Primary mandibular molars (n = 120) with a single distal canal were selected and randomly divided into four groups (n = 30) for root canal instrumentation using group I, HF (to size 0.30/0.02 taper), group II, PTU (to size F3), group III, PTN (to size X3), and group IV, SAF. Debris extruded during instrumentation was collected in preweighed Eppendorf tubes, stored in an incubator at 70°C for 5 days and then weighed. Statistical analysis was performed by one-way analysis of variance (ANOVA), followed by Turkey's post hoc test (p = 0.05). Results All the groups resulted in extrusion of debris. There was statistically significant difference (p < 0.001) in the debris extrusion between the three groups: HF (0.00133 ± 0.00012), PTU (0.00109 ± 0.00005), PTN (0.00052 ± 0.00008), and SAF (0.00026 ± 0.00004). Conclusion Instrumentation with SAF resulted in the least debris extrusion when used for shaping root canals of primary molar teeth. Clinical significance Debris extrusion in primary teeth poses an adverse effect on the stem cells and may also alter the permanent dental germ. Debris extrusion is rarely reported for primary teeth and it is important for the clinician to know which endodontic instrumentation leads to less extrusion of debris. How to cite this article Thakur B, Pawar AM, Kfir A, Neelakantan P. Extrusion of Debris from Primary Molar Root Canals following Instrumentation with Traditional and New File Systems. J Contemp Dent Pract 2017;18(11):1040-1044.

In vitro study assessing apical leakage of sealer-only backfills in root canals of primary teeth

2007 ◽  
Vol 35 (7) ◽  
pp. 607-613 ◽  
Author(s):  
A.M. Kielbassa ◽  
H. Uchtmann ◽  
K.-T. Wrbas ◽  
K. Bitter
Keyword(s):  
Primary Teeth ◽  
In Vitro Study ◽  
Vitro Study ◽  
Root Canals ◽  
Apical Leakage

Microbial culture and checkerboard DNA-DNA hybridization assessment of bacteria in root canals of primary teeth pre- and post-endodontic therapy with a calcium hydroxide/chlorhexidine paste

2011 ◽  
Vol 21 (5) ◽  
pp. 353-360 ◽  
Author(s):  
IZABEL YOKO ITO ◽  
FUMIO MATOBA JUNIOR ◽  
FRANCISCO WANDERLEY GARCIA PAULA-SILVA ◽  
LÉA ASSED BEZERRA Da SILVA ◽  
MÁRIO ROBERTO LEONARDO ◽  
...  
Keyword(s):  
Calcium Hydroxide ◽  
Dna Hybridization ◽  
Primary Teeth ◽  
Microbial Culture ◽  
Root Canals

Pediatric Obturating Materials And Techniques

2011 ◽  
Vol 1 (2) ◽  
pp. 27-32
Author(s):  
Shrirang Sevekar ◽  
Poonam Shingare ◽  
Vivek Jogani ◽  
Mihir Jha ◽  
Sonal D. Patil
Keyword(s):  
Primary Teeth ◽  
Root Formation ◽  
Primary Tooth ◽  
Root Canals ◽  
Advantages And Disadvantages ◽  
Pulp Therapy ◽  
Hermetic Seal

Abstract Pulp therapy helps in preserving a pulpally involved primary tooth by eliminating bacteria and their products and ensures hermetic seal of the root canals so that the primary tooth can complete its function without harming the successor or affecting the health of the patient. A thorough understanding of the pulp morphology and root formation and resorption in primary teeth as well as different materials and techniques used is imperative for a successful pulp therapy. One of the major areas of continued research is in the area of finding obturating materials to suit the specific properties of these teeth. This article seeks to present a review of the major obturating materials and techniques with their modifications as well as their advantages and disadvantages.

Accuracy of an Electronic Apex Locator: A Clinical Evaluation in Primary Molars with and without Resorption

2011 ◽  
Vol 35 (3) ◽  
pp. 255-258 ◽  
Author(s):  
Mesut Enes Odabaş ◽  
Haluk Bodur ◽  
Özlem Tulunoğlu ◽  
Alev Alaç am
Keyword(s):  
Primary Teeth ◽  
Root Resorption ◽  
Statistical Significance ◽  
Healthy Children ◽  
Primary Molar ◽  
Actual Length ◽  
Root Canals ◽  
Working Length ◽  
Microscopic Evaluation ◽  
Electronic Apex Locator

Objective: The aim of this study was to evaluate the accuracy of electronic apex locator (Root ZX) in primary teeth with and without apical root resorption in vivo. Study Design: The electronic working length was determined in 28 primary teeth (A total of 46 primary molar root canals with 24 roots without resorption and 22 roots with resorption) from twenty-eight healthy children using Root ZX. The teeth were then extracted. The actual length of each root was measured placing a K-File until the tip was visible at the apical foramen or the apical resorption level and approved with digital microscopic evaluation under 20× magnification and then withdrawn 1 mm. The distances from the file tip to the base of the rubber stop were measured and compared with the measurement obtained from apex locator. The data were evaluated with t test using standard statistical software (SPSS 13.0). The critical value of statistical significance was 5%. Results: For root canals without resorption, the accuracy of Root ZX was 79.16% and 95.82% within ± 0.5 and ± 1 mm, respectively. For root canals with resorption,the accuracy of Root ZX was 63.63% and 86.35% within ± 0.5 and ± 1 mm, respectively. No statistically significant differences were detect between the electronically determined lengths and the actual lengths regardless of whether or not resorption. Conclusion: Using a Root ZX Electronic Apex Locator in primary teeth with or without resorption is recommended for the determination of working length.

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