An in vitro assessment of the effect of load and pH on wear between opposing enamel and dentine surfaces

Ranjitkar, Sarbin; Kaidonis, John; Townsend, Grant; Vu, Anh M; Richards, Lindsay

doi:10.1016/j.archoralbio.2008.05.013

Cited by 27 publications

(27 citation statements)

References 23 publications

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“…The findings of faster rates of dentine wear in the S3 stage compared with S1 or S2 stages are consistent with those of our previous study showing that dentine near the pulp (deep dentine) wears faster than dentine near the dentino-enamel junction (superficial dentine). 17 Intermittent application of TM also reduced dentine wear in both the acidic and relatively neutral environments, although the benefit was greater in the latter. These findings open up possibilities for a new approach to tooth wear prevention, and indicate that TM could be used as an alternative to nightguards in certain situations.…”

Section: Discussionmentioning

confidence: 99%

“…The rationale behind selection of the number of wear cycles for secondary wear stages, loads and pH values has been reported in our previous study. 17 Little is understood about the frequency of sleep bruxism episodes with jaw movements and associated bite force. In a sleep bruxism study, Lavigne et al 23 observed an average of 30 bruxism episodes with grinding noise in individuals per night.…”

Section: Discussionmentioning

confidence: 99%

“…The wear rates of dentine specimens worn with continuous application of TM at pH 7.2 (group A, n = 7) were compared with those of specimens worn with continuous application of hydrochloric acid (HCl) at pH 3.0 (group B, n = 9) and deionized water (DW) at pH 6.1 (group C, n = 6) derived in our previous study. 17 Deionized water is a standard lubricant in tribological studies of dental materials. 20 The HCl and DW lubricants were supplied to the wear interface by a gravity-fed drip system at the rate of 0.5 mL ⁄ min).…”

Section: Mechanical Testingmentioning

confidence: 99%

“…17 The protocol for collection of extracted human teeth was approved by the University of Adelaide Human Research Ethics Committee (H ⁄ 27 ⁄ 90). Freshly extracted, intact third molar teeth with unknown history were sectioned mesio-distally along their longitudinal axis with a Buehler Isomet diamond saw (Buehler, Dusseldorf, Germany), and enamel from the buccal halves of the crowns was carefully removed with high-speed diamond burs to expose the dentine surface.…”

Section: Sample Preparationmentioning

confidence: 99%

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The effect of casein phosphopeptide‐amorphous calcium phosphate on erosive dentine wear

Ranjitkar

Narayana

Kaidonis

et al. 2009

Australian Dental Journal

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Background: Erosive tooth wear is a growing concern in clinical dentistry. Our aims were to assess the effect of Tooth Mousse (TM) in managing erosive dentine wear in vitro. Methods: Opposing enamel and dentine specimens from 36 third molar teeth were worn under a load of 100 N for 75 000 cycles in electromechanical tooth wear machines. In experiment 1, TM was applied continuously at the wear interface and the mean dentine wear rate was compared with those of specimens subjected to continuous application of hydrochloric acid (HCl, pH 3.0) and deionized water (DW, pH 6.1) as lubricants. In experiment 2, specimens were subjected to TM application every 1600 cycles at both pH 3.0 and 6.1, and the mean dentine wear rates were compared with those of specimens worn with continuous application of HCl and DW lubricants. Results: Dentine wear was reduced significantly with continuous application of TM compared with HCl and DW lubricants. Specimens prepared with continuous TM application displayed smooth wear facets, whereas more pronounced microwear details were observed with HCl and DW lubricants. Conclusions: Both remineralization and lubrication seem to contribute to reduction in dentine wear associated with TM application, although lubrication appears to have a more pronounced effect.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Mechanical Testingmentioning

confidence: 99%

Section: Sample Preparationmentioning

confidence: 99%

See 2 more Smart Citations

The effect of casein phosphopeptide‐amorphous calcium phosphate on erosive dentine wear

Ranjitkar

Narayana

Kaidonis

et al. 2009

Australian Dental Journal

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“…The question remains on how acid treatment of dentine affects attrition and whether it accelerates tooth wear. Recently, Ranjitkar et al 6 developed an attrition model and showed that acid lubricants at pH 3.0 and 6.1 placed between opposing sections of dentine did not statistically significantly affect wear. The authors concluded that attrition was not affected by acid in their laboratory model.…”

Section: Introductionmentioning

confidence: 99%

An experiment on the attrition of acid demineralized dentine in vitro

Li¹,

Liu²,

Deng³

et al. 2011

Australian Dental Journal

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Background: A laboratory investigation was designed to test the hypothesis that acids increase the rate of wear caused by attrition on dentine. Methods: Dentine sections from 10 teeth were polished, cleaned in an ultrasonic bath and divided into 8 equally sized areas. The occlusal tip of a tooth, placed vertically in a wear machine and loaded at 150 N, was moved against each dentine section for 5000 return strokes with artificial saliva acting as a lubricant. Each dentine section was divided into 8 sections and half randomly immersed in a 1% citric acid solution (pH 2.3) for 20 minutes. The wear regime produced 8 wear scars in total per dentine sample. The volume of each wear scar was measured using a contacting digitizing profilometer. Results: A total of 80 wear scars were produced with 40 treated with acid and 40 acting as controls. The mean for wear volume of the dentine scars with acid was 4.84 lm 3 (1.38) and for the non-acid surface 2.95 lm 3 (0.86). This difference was statistically significant (p < 0.05). Conclusions: These results support the hypothesis that acids increase the rate of wear caused by attrition on dentine.

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Viewpoints: Feeding mechanics, diet, and dietary adaptations in early hominins

Daegling

Judex

Özçivici

et al. 2013

American J Phys Anthropol

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Inference of feeding adaptation in extinct species is challenging, and reconstructions of the paleobiology of our ancestors have utilized an array of analytical approaches. Comparative anatomy and finite element analysis assist in bracketing the range of capabilities in taxa, while microwear and isotopic analyses give glimpses of individual behavior in the past. These myriad approaches have limitations, but each contributes incrementally toward the recognition of adaptation in the hominin fossil record. Microwear and stable isotope analysis together suggest that australopiths are not united by a single, increasingly specialized dietary adaptation. Their traditional (i.e., morphological) characterization as "nutcrackers" may only apply to a single taxon, Paranthropus robustus. These inferences can be rejected if interpretation of microwear and isotopic data can be shown to be misguided or altogether erroneous. Alternatively, if these sources of inference are valid, it merely indicates that there are phylogenetic and developmental constraints on morphology. Inherently, finite element analysis is limited in its ability to identify adaptation in paleobiological contexts. Its application to the hominin fossil record to date demonstrates only that under similar loading conditions, the form of the stress field in the australopith facial skeleton differs from that in living primates. This observation, by itself, does not reveal feeding adaptation. Ontogenetic studies indicate that functional and evolutionary adaptation need not be conceptually isolated phenomena. Such a perspective helps to inject consideration of mechanobiological principles of bone formation into paleontological inferences. Finite element analysis must employ such principles to become an effective research tool in this context. Am J Phys Anthropol 151:356-371, 2013. V C 2013 Wiley Periodicals, Inc.

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An in vitro assessment of the effect of load and pH on wear between opposing enamel and dentine surfaces

Cited by 27 publications

References 23 publications

The effect of casein phosphopeptide‐amorphous calcium phosphate on erosive dentine wear

The effect of casein phosphopeptide‐amorphous calcium phosphate on erosive dentine wear

An experiment on the attrition of acid demineralized dentine in vitro

Viewpoints: Feeding mechanics, diet, and dietary adaptations in early hominins

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