A primary observation on the preparation and obturation of oval canals

Wu, Min-Kai; Wesselink, Paul R.

doi:10.1046/j.1365-2591.2001.00361.x

Cited by 288 publications

(303 citation statements)

References 10 publications

(13 reference statements)

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“…As shown by previous studies, there is a relationship between the presence of voids and the filling technique used (11,18,19). In general, thermoplastification techniques, such as MicroSeal and Tagger's hybrid, show a higher percentage of guttapercha than GuttaFlow and lateral compaction techniques at the coronal and middle thirds.…”

Section: Discussionmentioning

confidence: 70%

“…Many obturation techniques have been developed to obtain a complete root canal filling. For comparative purposes, the composition of the root filling techniques have been evaluated by achieving the percentage area of gutta-percha, sealer and voids (11,12). In the present study, lateral incisors were used in attempt to avoid the presence of isthmus or flattening areas, commonly found in molars and mandibular incisors (13).…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of single root canals filled using the lateral compaction, tagger's hybrid, microseal and guttaflow techniques

et al. 2010

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The aim of this study was to determine the percentage of voids, gutta-percha and root canal sealer using 4 different filling techniques. Fifty-two extracted maxillary lateral incisors were prepared using the crown-down pressureless technique. The teeth were randomly divided in 4 groups (n=13): Lateral compaction (LC), Tagger's hybrid (TH), MicroSeal (MS) and GuttaFlow (GF) techniques. Horizontal cross-sections were made at the 2, 10 and 15 mm levels from the apex. Digital images of the root canal areas were acquired using a stereomicroscope and examined using the Image Tool 3.0 software. Statistical analysis was performed using the Kruskal-Wallis test (α=0.05). In general, a significant decrease in the gutta-percha filled area and increase of sealer area were observed at the apical level for all the evaluated techniques (p<0.05). With regard to the presence of voids, no significant difference was found. MS and TH techniques showed a larger gutta-percha filled area than LC and GF techniques at the coronal and middle third level (p<0.05). From the results of the present study, it may be concluded that the gutta-percha filled area of fillings decrease at the apical level, regardless of the filling technique used.

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Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Evaluation of single root canals filled using the lateral compaction, tagger's hybrid, microseal and guttaflow techniques

et al. 2010

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“…4 Previous studies have reported that oval-shaped root canals taper to rounder shapes apically because the long diameters of oval canals decrease in apical areas. 25,26 In one study, no significant difference was observed in the percentages of unprepared root canal walls using SAF or rotary instruments in the apical third of the canal. 21 Versiani et al 21 reported that the size of the SAF preparation in the apical third of the canal was equivalent to those prepared with #40 rotary file with a 0,02 taper.…”

Section: Discussionmentioning

confidence: 96%

“…However, uninstrumented recesses might not be completely filled by cold lateral condensation in oval-shaped canals. 26 Because it might have only limited ability to fill entirely the empty recesses cleaned of debris with the SAF, cold lateral condensation might not be achieved properly. De-Deus et al 17 evaluated the filling ability of a thermoplasticized carrier-based technique in canals prepared with the SAF system.…”

mentioning

confidence: 99%

An Evaluation of the Apical Seal in Oval-shaped Root Canals Prepared with Either Self-adjusting Files or ProTaper Files

Helvacıoğlu-Yiğit¹,

Oruçoğlu²,

Yavuz³

et al. 2014

Cumhuriyet Dent J

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Objectives: This study aimed to evaluate the apical seal obtained with lateral compaction of gutta-percha in oval-shaped root canals prepared with either self-adjusting files or ProTaper Universal rotary files. Materials and Methods: Twelve pairs of extracted mandibular premolars with oval-shaped root canals were randomly divided into two groups. The first group was biomechanically prepared with ProTaper Universal files, while the self-adjusting file system was used in the second group. The roots were better filled using cold lateral compaction of gutta-percha. Apical microleakage was measured with the computerized fluid filtration method. The results were analyzed statistically using the Mann-Whitney U test. Results: All of the roots in both groups showed leakage. Group 1 demonstrated significantly less microleakage (p<0.05). Conclusions: Instrumentation of oval-shaped canals using a self-adjusting file system with cold lateral compaction of gutta-percha demonstrated significantly greater apical microleakage when compared to ProTaper Universal. The apical leakage with different filling techniques, combined with self-adjusting files, should be evaluated in further studies.

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“…O preparo mecânico por si só não é capaz de atingir todas as regiões do canal, deixando áreas não trabalhadas onde a ação de substâncias químicas é fundamental (Spångberg, 1982;Byström;Sundqvist, 1983;Wesselink, 2001). …”

Section: Introductionunclassified

Avaliação in vivo da redução microbiana após preparo do canal radicular com auxílio do sistema EndoVac

Bitencourt¹

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"O conhecimento científico é cumulativo, dependente do desenvolvimento de novas tecnologias e idéias. Nossas verdades permanecem verdadeiras até que alguém demonstre que elas são incompletas. No mínimo, esta perspectiva deveria nos ensinar a defender nossas verdades temporárias com a humildade de quem aprende com o passado." The present study aimed to analyze in vivo the effectiveness of root canal preparation on bacterial reduction in patients's teeth with primary apical periodontitis. Marcelo Gleiser RESUMOSamples were collected from 20 patients before (S1) and after (S2) preparation with ProTaper rotary files, varying only the technique used for irrigation and aspiration:Group A (conventional irrigation -n = 10) and Group B (with the aid of EndoVac system -n = 10). After extraction, the DNA present in the samples was quantified by real-time PCR with the SYBR Green method, identifying the number of 16SrRNA gene copies. In all samples, except for a post-preparation case with EndoVac, copies of the target gene were identified. Average for all cases was 1,6 X 10 8 and 8,8 X 10 5 copies of the 16SrRNA, before and after preparation, respectively. For the groups separately, the same values were 2,0 X 10 8 and 5,5 X 10 5 (conventional) and 1,1 X 10 8 and 1,2 X 10 6 (EndoVac). The mean percentage of reduction was 97.52% (97.02% for the conventional and 98.04% for the EndoVac). The Mann-Whitney test concluded that both techniques significantly reduced the microrganisms after preparation (p<0,0001), with no differences between them (p=0,9705). None of the techniques were effective in the complete elimination of bacteria under this methodology. The antibacterial efficacy of the EndoVac system under this methodology was similar to that obtained with conventional irrigation and aspiration.

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A primary observation on the preparation and obturation of oval canals

Abstract: Uninstrumented recesses may be left in many oval canals after preparation using the balanced force technique and these recesses may often not be completely obturated with cold laterally condensed gutta-percha.

Cited by 288 publications

References 10 publications

Evaluation of single root canals filled using the lateral compaction, tagger's hybrid, microseal and guttaflow techniques

Evaluation of single root canals filled using the lateral compaction, tagger's hybrid, microseal and guttaflow techniques

An Evaluation of the Apical Seal in Oval-shaped Root Canals Prepared with Either Self-adjusting Files or ProTaper Files

Avaliação in vivo da redução microbiana após preparo do canal radicular com auxílio do sistema EndoVac

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