23. An Experimental Study on AH-26, Root Canal Filling Material with EPOXY-RESIN Basis (4th report)

The objective of this study was to evaluate the efficacy of reciprocating instruments in the removal of bioceramic and epoxy resin-based sealers using micro-CT analysis. Root canals of 40 extracted human teeth were instrumented with a size R25 Reciproc instrument. Specimens were randomly divided into two groups (n = 20) according to the root canal filling material. In the first group, root canals were obturated with AH Plus sealer and Reciproc R25 gutta-percha. In the second group, a combination of bioceramic gutta-percha (TotalFill BC) and bioceramic sealer (TotalFill BC) was used. After one week, the retreatment of all specimens was performed using Reciproc instruments. To analyze the differences in the filling remnants, specimens were scanned in a micro-CT device after obturation and after the retreatment procedure. Statistical analysis was performed using the Mann–Whitney U test (p < 0.05). A combination of bioceramic sealer and bioceramic gutta-percha was more effectively removed from canals using a reciprocating instrument, with a filling remnants volume of 4.01 ± 3.13 mm3, in comparison to the combination of epoxy resin-based sealer and gutta-percha (6.96 ± 2.70 mm3) (p < 0.05). A reciprocating instrument was more effective in removing bioceramic sealers than epoxy resin-based sealers, although none of the root canal filling materials were completely removed from the root canals.

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Effectiveness of ProTaper, D-RaCe, and Mtwo retreatment files with and without supplementary instruments in the removal of root canal filling material

International Endodontic Journal ◽

10.1111/j.1365-2591.2012.02051.x ◽

2012 ◽

Vol 45 (10) ◽

pp. 927-932 ◽

Cited By ~ 32

Author(s):

B. Marques da Silva ◽

F. Baratto-Filho ◽

D. P. Leonardi ◽

A. Henrique Borges ◽

L. Volpato ◽

...

Keyword(s):

Root Canal ◽

Filling Material ◽

Root Canal Filling

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Assessment of rotatory and reciprocating movements in root canal filling material removal

10.11606/t.25.2017.tde-26112021-105726 ◽

2017 ◽

Author(s):

Amanda Garcia Alves Maliza

Keyword(s):

Root Canal ◽

Material Removal ◽

Filling Material ◽

Root Canal Filling

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OCTACALCIUM PHOSPHATE-MEDIATED CEMENT AS A ROOT CANAL FILLING MATERIAL FOR PRIMARY TEETH

Phosphorus Research Bulletin ◽

10.3363/prb.26.33 ◽

2012 ◽

Vol 26 (0) ◽

pp. 33-38

Author(s):

Yuki Imamura ◽

Miho Nakamura ◽

Akiko Nagai ◽

Yuzo Takagi ◽

Kimihiro Yamashita

Keyword(s):

Root Canal ◽

Primary Teeth ◽

Octacalcium Phosphate ◽

Filling Material ◽

Root Canal Filling

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Injectable calcium phosphate and styrene–butadiene polymer-based root canal filling material

Asian Biomedicine ◽

10.2478/abm-2021-0003 ◽

2021 ◽

Vol 15 (1) ◽

pp. 19-26

Author(s):

Hala B. Kaka ◽

Raid F. Salman

Keyword(s):

Calcium Phosphate ◽

Root Canal ◽

Setting Time ◽

Molar Ratio ◽

Styrene Butadiene Rubber ◽

Filling Material ◽

Butadiene Rubber ◽

Root Canal Filling ◽

Phosphate Powder ◽

Styrene Butadiene

Abstract Background Three-dimensional obturation of the root canal system is mandatory for a successful root canal treatment. Using a filling material with optimal properties may enable the root canal to be sealed well and therefore obtain the desired obturation. Objective To develop a new injectable paste endodontic filling material using calcium phosphate powder and a styrene–butadiene emulsion polymer. Methods The powder phase comprised an equivalent molar ratio of tetracalcium phosphate, anhydrous dicalcium phosphate, bismuth oxide, and calcium chloride. The liquid phase comprised a styrene–butadiene rubber emulsion in distilled water. The powder and the liquid were mixed to achieve a paste consistency. The paste was subjected to various tests including flow, setting time, dimensional change, solubility, and radiopacity to indicate its suitability as a root canal filling material. All these tests were conducted according to the American National Standards Institute–American Dental Association for endodontic sealing materials. After passing these tests, the paste was submitted to an injectability test. Results The material showed acceptable flowability with 19.1 ± 1.3 min setting time and 0.61 ± 0.16% shrinkage after 30 days of storage. We found the highest solubility at 24 h (6.62 ± 0.58%), then the solubility decreased to 1.09 ± 0.08% within 3 days. The material was more radiopaque than a 3 mm step on an aluminum wedge. Furthermore, the material showed good injectability of 93.67 ± 1.80%. Conclusions The calcium phosphate powder in styrene–butadiene emulsion met basic requirements for a root canal filling material with promising properties.

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Healing of a tooth with an overinstrumented apex, extensive transportation and periapical lesion using a 5 mm calcium hydroxide apical plug: an 8-year follow-up report

Brazilian Dental Journal ◽

10.1590/s0103-64402012000500024 ◽

2012 ◽

Vol 23 (5) ◽

pp. 608-611

Author(s):

Ronaldo Araújo Souza ◽

Yara T. Corrêa Silva-Sousa ◽

Suely Colombo ◽

Maurício Lago ◽

Marco Antonio Hungaro Duarte ◽

...

Keyword(s):

Calcium Hydroxide ◽

Root Canal ◽

Apical Periodontitis ◽

Filling Material ◽

Root Canal Filling ◽

Apical Constriction ◽

Gutta Percha ◽

Open Apices ◽

Canal Transportation

Besides the risk of filling material extrusion throughout the apex, a satisfactory apical seal can be difficult to achieve in canals with open apices or iatrogenic enlargements of the apical constriction. These situations pose a challenge to root canal filling. This paper describes the root canal filling of a maxillary right canine with an overinstrumented apex, complete loss of the apical stop, extensive canal transportation and apical periodontitis. A 5 mm calcium hydroxide apical plug was placed before root canal filling. The plug was made by soaking paper points with saline, dipping the points in calcium hydroxide powder and then applying it to the apex several times, until a consistent apical plug was obtained. The canal was then irrigated with saline in order to remove any residual calcium hydroxide from the root canal walls, dried with paper points and obturated with an inverted #80 gutta-percha cone and zinc oxide-eugenol based sealer by the lateral condensation technique. An 8-year radiographic follow-up showed formation of mineralized tissue sealing the apical foramen, apical remodeling and no signs of apical periodontitis.

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Sealing Ability of AH Plus and GuttaFlow Bioseal

Bioinorganic Chemistry and Applications ◽

10.1155/2020/8892561 ◽

2020 ◽

Vol 2020 ◽

pp. 1-8

Author(s):

Soo-Hyuk Lee ◽

Soram Oh ◽

Adel Saeed Al-Ghamdi ◽

Ayman Omar Mandorah ◽

Kee-Yeon Kum ◽

...

Keyword(s):

Fluid Flow ◽

Root Canal ◽

Glass Ceramics ◽

Filling Material ◽

Root Canal Filling ◽

Measuring Device ◽

Gutta Percha ◽

Sealing Ability ◽

Ah Plus ◽

The Mean

The objective of root canal obturation is to achieve a fluid-tight seal. Recently, GuttaFlow bioseal (GB), a root canal sealer composed of polydimethylsiloxane, gutta-percha particles, and bioactive glass ceramics, has been developed, to enhance the sealing ability of root canal filling material. The objective of this study was to assess the sealing ability of GB using a subnanoliter-scaled fluid-flow measuring device and to compare with that of AH Plus (AH). The fluid flow in root canal-filled teeth using either gutta-percha cone (GP) with AH (GAR; n = 10) or GP with GB (GBR; n = 10) and in GP inserted in AH blocks (GA; n = 10) or GP inserted in GB blocks (GB; n = 10) was measured. In addition, fluid flow in sealer blocks of AH (A; n = 10) and GB (B; n = 10), which served as negative controls, was measured. Root canal-filled teeth using GP without any sealer (GR) acted as positive controls (n = 10). The leakage was obtained by calculating the volume of moved water by time (s), after stabilization of the fluid flow was achieved. Statistical analysis was performed using the Kruskal–Wallis test and Mann–Whitney U-test with Bonferroni correction. A p value less than 0.00238 (0.05/21) was considered significantly different. The mean leakages (nL/s) in the groups are as follows: GAR, 0.0958 ± 0.0543; GBR, 0.0223 ± 0.0246; GA, 0.0644 ± 0.0803; GB, 0.0267 ± 0.0182; A, 0.0055 ± 0.0057; B, 0.0052 ± 0.005; and GR, 0.2892 ± 0.3018. The mean leakage in the GBR group was lower than that in the GAR group (p = 0.001), while the mean leakages in the GA and GB groups were not significantly different. GuttaFlow bioseal can be useful in single-cone obturation technique.

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