Bovine Teeth as Possible Substitutes in the Adhesion Test

Nakamichi, Ikuo; Iwaku, Masaaki; Fusayama, Takao

doi:10.1177/00220345830620101501

Cited by 509 publications

(335 citation statements)

References 5 publications

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“…ARI 0 = no adhesive left on the tooth; ARI 1 = less than half of adhesive left on the tooth; ARI 2 = more than half of adhesive left on the tooth; ARI 3 = all adhesive left on the tooth, with distinct bracket mesh impression. Bovine enamel is commonly used in bonding studies because of the advances in dental health and conservative dentistry as well as the limits in the access to human teeth (16,17). Relatively lower SBS values found in this study can be justified by the fact that bovine teeth present weaker bond strength than human teeth (16).…”

Section: Discussionmentioning

confidence: 65%

“…Bovine enamel is commonly used in bonding studies because of the advances in dental health and conservative dentistry as well as the limits in the access to human teeth (16,17). Relatively lower SBS values found in this study can be justified by the fact that bovine teeth present weaker bond strength than human teeth (16). Clinically reasonable values cited by Reynolds (18) cannot be accepted as a reference because his study was a literature review and there is no evidence-based arguments for the 5 to 8 MPa values.…”

Section: Discussionmentioning

confidence: 99%

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Effect of etching and light-curing time on the shear bond strength of a resin-modified glass ionomer cement

et al. 2010

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The aim of this study was to assess the influence of etching and light-curing time on the shear bond strength (SBS) and adhesive remnant index (ARI) of a resin-modified glass ionomer cement (RMGIC) upon debonding of orthodontic brackets. Sixty-eight bovine permanent incisors were obtained and embedded in acrylic resin. Edgewise metallic brackets were bonded to the teeth with Fuji Ortho LC RMGIC. The specimens were randomly assigned to 4 groups, using the following etching and light-curing times: G1: 10% polyacrylic acid and 40 s (control); G2: 37% phosphoric acid and 40 s; G3: 10% polyacrylic acid and 50 s; and G4: 37% phosphoric acid and 50 s. Shear test was performed at 0.5 mm/min and the ARI was assessed. G2 (3.6 ± 0.98 MPa) presented significantly higher (p<0.05) SBS than G1 (2.76 ± 0.86 MPa) and G4 (2.86 ± 0.68 MPa), and there was no statistically significant difference (p>0.05) between G2 and G3 (2.94 ± 0.67 MPa). ARI presented prevalence of scores 2 and 3 in all groups. RMGIC SBS enhanced with 37% phosphoric acid etching and 40 s light-curing time, but this did not occur when the light-curing time was increased, regardless of the acid used. RMGIC presented prevalence of failures at the adhesive/bracket interface.

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Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Effect of etching and light-curing time on the shear bond strength of a resin-modified glass ionomer cement

et al. 2010

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“…Therefore, it can be hypothesized that the structure and composition of the animals' teeth were very similar. Bovine dentin is frequently used as a substitute for human dentin for in vitro studies in adhesion, erosion and biomechanics, [20][21][22] because it is readily available and has a similar composition and chemical structure. Knowing that many variables influence the water content of dentin, the authors gently extracted the bovine dentin disc specimens from the roots and standardized the preparations as much as possible.…”

Section: Discussionmentioning

confidence: 99%

Influence of Bleaching Agents and Desensitizing Varnishes on the Water Content of Dentin

Betke

Kahler

Reitz

et al. 2006

Operative Dentistry

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The dehydration of tooth structure is discussed as a possible factor for tooth hypersensitivity arising during bleaching; however, it still remains unclear to what extent glycerinebased bleaching gels dehydrate dentin and whether dentin hydration can be maintained by protective dentin varnishes. SUMMARYThis in vitro study investigated the possible dehydration of dentin caused by bleaching agents. Furthermore, it tested whether protective dentin varnishes can maintain the physiological moisture of dentin during bleaching treatment. Fifty-five standardized dentin cylinders were prepared from freshly extracted bovine incisors under constant water irrigation. Prior to bleaching, the treatment specimens were conditioned at room temperature in a hygrophor for 14 days. The samples were divided into 11 groups. The Group A specimens, which were completely dehydrated, and Group B, which was stored for 2 weeks in a hygrophor, served as controls (A, B n=5). The other samples (n=10 each group) were coated with Vivasens [VS] (C), Bilfuorid [BF] (D) and Seal&Protect [SP] (E). Five specimens from each group (C-E) were subsequently treated with an experimental bleaching gel (Exp BG) (20% carbamide peroxide [CP], glycerine-based gel): Cb, Db, Eb. The remaining specimens were bleached with Exp BG (F) only, Vivastyle (G: 16% CP, glycerine-based gel) or Vivastyle Paint On (H: 6% CPvarnish) for 7 days (n=5 each group) with bleaching time for gels: 2 hours/day, paint on: 20 minutes/day. After the respective treatments, the overall water content of each specimen was determined using the analytical method of KarlFischer-titration. The water content of bovine dentin (Group B, mean%±SD) obtained in this

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“…Microtensile bond strength test Mandibular incisors extracted from 2 to 3-year-old cattle and stored frozen (-20°C) for up to 2 weeks were used as a substitute for human teeth (9)(10)(11). After removing the roots with a low-speed diamond saw (Isomet 1000; Buehler Ltd., Lake Bluff, IL, USA), the pulps were removed, and the labial surfaces of the teeth were ground on wet 600-grit SiC paper.…”

Section: Methodsmentioning

confidence: 99%

Microtensile bond strengths of single-step self-etch adhesive systems to bovine dentin

et al. 2007

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The purpose of this study was to examine the microtensile bond strength of a single-step selfetch adhesive system (Clearfil tri-S Bond and One-Up Bond F Plus) to bovine dentin. Adhesive was applied to a flat dentin surface, and resin composite was bonded according to the manufacturers' instructions. After 24 h storage in distilled water at 37°C, hourglassshaped specimens were produced. These were subjected to microtensile bond strength testing at a cross-head speed of 1.0 mm/min. The results were analyzed using Student's t-test at a significance level of 0.05. Fieldemission scanning electron microscopy (FE-SEM) observations of the fractured specimens and the adhesive-treated dentin surfaces were also conducted. The bond strength of Clearfil tri-S Bond was not significantly different from that of One-Up Bond F Plus, 41.1 ± 10.1 versus 42.3 ± 6.0 MPa. Mode of failure analysis for Clearfil tri-S Bond revealed an equal distribution between the three types of failure, and the predominant mode of failure was adhesive for One-Up Bond F Plus. FE-SEM observations of dentin to which adhesive had been applied revealed that the smear layer had been removed and the collagen fibers exposed. (J. Oral Sci. 49, [183][184][185][186][187][188][189] 2007)

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Bovine Teeth as Possible Substitutes in the Adhesion Test

Cited by 509 publications

References 5 publications

Effect of etching and light-curing time on the shear bond strength of a resin-modified glass ionomer cement

Effect of etching and light-curing time on the shear bond strength of a resin-modified glass ionomer cement

Influence of Bleaching Agents and Desensitizing Varnishes on the Water Content of Dentin

Microtensile bond strengths of single-step self-etch adhesive systems to bovine dentin

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