Nanomechanical Properties of Endodontically Treated Teeth

Cheron, R.; Marshall, Sally J.; Goodis, Harold E.; Peters, Ove A.

doi:10.1016/j.joen.2011.08.006

Cited by 24 publications

(6 citation statements)

References 37 publications

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“…There seem to be many questions relating to whether these alterations can affect the prognosis of root canal treatment. Notwithstanding, no difference was shown in the modulus of elasticity or the hardness of radicular intertubular dentin when root canal-treated and untreated teeth were compared in a previous study (33). According to the researchers, changes in mechanical properties of intertubular dentin are unlikely to be causative for fractures after endodontic treatment (33).…”

Section: Discussionmentioning

confidence: 96%

The Effect of Surfactant Addition to EDTA on Microhardness of Root Dentin

Akçay

Şen

2012

Journal of Endodontics

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Section: Discussionmentioning

confidence: 96%

The Effect of Surfactant Addition to EDTA on Microhardness of Root Dentin

Akçay

Şen

2012

Journal of Endodontics

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“…Nanoindentation has been used in dentistry to evaluate the mechanical properties of the dental hard tissues for the past two decades. [ 18 ] It has been used in the field of endodontics to determine the nanomechanical properties of endodontically treated teeth and carious human teeth,[ 28 29 ] in implantology to study the elasticity of the alveolar bone near the dental implant[ 30 ] and in orthodontics. [ 31 ] In the field of periodontics, nanoindentation has been used to determine the nanomechanical properties of the cement-dentinal junction,[ 14 15 ] cementum in Ank/Ank mutant mouse[ 32 ] bone-periodontal ligament and cementum complex.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the nanostructure of cervical third cementum in health and chronic periodontitis: An in vitro study

Sundaram

Ramaseshan

Dash

et al. 2014

J Indian Soc Periodontol

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Background:During the progression of periodontal disease, the cementum undergoes alterations in its structure and composition. Understanding the nanostructure of cementum, in terms of its mechanical properties, will provide an insight into the milieu that periodontal ligament cells encounter in health and chronic periodontitis. This study aims to analyze the nanomechanical properties of the cervical third of the cementum (transverse section) in health and chronic periodontitis.Materials and Methods:Twenty teeth (10 healthy and 10 periodontally diseased) were collected and the nanomechanical properties of the transverse section of the cervical third cementum were evaluated with depth-sensing nanoindentation technique under dry conditions. A total of 100 nanoindentations were performed to analyze the modulus of elasticity and hardness of cervical third of the cementum.Results:The nanomechanical properties of the healthy cervical third cementum sections were significantly higher (P < 0.05) (hardness: 0.720 ± 0.305 GPa; modulus: 15.420 ± 3.902 GPa) than the diseased cementum section (hardness: 0.422 ± 0.157 GPa; modulus: 11.056 ± 3.434 GPa).Conclusion:The results of our study indicate that the hardness and modulus of elasticity of the cervical third cementum decreases significantly in chronic periodontitis.

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“…However using the same testing methodology, the use of 17% EDTA reduced dentine hardness compared to 17% EGTA (Sayin et al 2007b). However another hardness study, employing dentine micro indentation and atomic force microscopy, reported no hardness differences between extracted root filled and extracted controls (Cheron et al 2011).…”

Section: Effect Of Irrigation Sequences On Dentine Structure and Functionmentioning

confidence: 96%

“…Clinical relevance may also help explain the differences noted in the hardness studies. Although the techniques in these studies varied and therefore the results are difficult to compare, the only one reporting no changes in dentine hardness was also the study where the teeth tested had previously undergone in vivo root canal treatment (Cheron et al 2011).…”

Section: )mentioning

confidence: 99%

Continuous Chelation in Endodontics with a Focus on the Novel Chelator Clodronate

Wright¹

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BackgroundSodium hypochlorite (NaOCl) is essential to endodontic irrigation because it uniquely dissolves organic matter and disinfects. Chelators remove the smear layer. Sequences of NaOCl and the chelator ethylenediaminetetraacetic acid (EDTA) are in common use because alone neither fulfils all the core functions required of an irrigant. In 2005, the concept of continuous chelation was introduced, whereby a chelator is combined with NaOCl for simultaneous antimicrobial and proteolytic actions and with the capacity to remove smear layer. Not only is this simpler compared to standard irrigation, but some authors report improved antimicrobial effectiveness, enhanced dentinal debris removal, and improved bonding of endodontic materials to dentine. Combinations of alkaline EDTA with NaOCl have been investigated, although the only commercial application of this technique employs the chelator etidronate. The major shortcoming of etidronate-NaOCl mixtures is that a chemical reaction occurs between etidronate and NaOCl, causing reduced NaOCl concentrations over time. Given that continuous chelation may hold advantages, finding a chelator more compatible with NaOCl than etidronate would improve the lifespan of continuous chelation mixtures. ObjectivesThe initial objective was to examine the effect of heating to intracanal temperature on known continuous chelation mixtures. A number of chelators were then screened, aiming to identify one, which when combined with NaOCl had better stability with NaOCl than etidronate and was capable of removing smear layer. Once identified, the NaOCl stability of such a mixture was examined at root canal temperature and in refrigerated storage. Subsequent objectives focused on comparing the identified mixture to etidronate-hypochlorite mixtures, standard sequences and NaOCl with respect to organic tissue dissolution, antimicrobial activity and tooth fracture resistance. MethodsFree available chlorine (FAC), pH and temperature were used to assess NaOCl stability in known continuous chelation mixtures at root canal temperature versus room temperature.Iodometric titration was used to determine the FAC. This methodology was then employed to identify a stable chelator-NaOCl solution from several novel chelator mixtures at room Foremost, I would like to thank my supervisors, Professor Laurie Walsh and Honorary Associate Professor Bill Kahler. Without them this PhD thesis would not have been possible.Early on in my PhD, Laurie spent considerable time with me ploughing through the endodontic literature. It was this early foundation which engendered in me the importance of reading the literature. Laurie's door was always open and despite being an incredibly busy and productive person, Laurie addressed concerns as they arose and put ideas on the table.He was also the generous funder of my research. This was a godsend as it ensured that products could be purchased when required. Bill was my moral support when times were tough. He always had time to listen and understand. His knowledge on publication ...

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Nanomechanical Properties of Endodontically Treated Teeth

Cited by 24 publications

References 37 publications

The Effect of Surfactant Addition to EDTA on Microhardness of Root Dentin

The Effect of Surfactant Addition to EDTA on Microhardness of Root Dentin

Evaluation of the nanostructure of cervical third cementum in health and chronic periodontitis: An in vitro study

Continuous Chelation in Endodontics with a Focus on the Novel Chelator Clodronate

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