Comparison of the number and diameter of dentinal tubules in human and bovine dentine by scanning electron microscopic investigation

Schilke, Reinhard; Lisson, Jörg A.; Bauß, Oskar; Geurtsen, Werner

doi:10.1016/s0003-9969(00)00006-6

Cited by 337 publications

(302 citation statements)

References 19 publications

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“…Histochemical and comparative morphological studies have revealed that all mammalian teeth are essentially similar (13). According to Schilke et al (4), mid-depth bovine and human dentin have similar number and diameter of coronal dentin tubules. Reis et al (1), showed by scanning electron microscopy that human and bovine coronal dentin substrates are very much alike with regard to number and diameter of tubules in mid-depth dentin, and the comparison of enamel morphology after acid etching revealed that the human and bovine enamel showed apparently similar aspects (1).…”

Section: Discussionmentioning

confidence: 99%

Fracture strength of composite fixed partial denture using bovine teeth as a substitute for human teeth with or without fiber-reinforcement

et al. 2010

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This study evaluate the use of bovine teeth as a substitute for human teeth on fracture strength tests of composite fixed partial dentures (Cpd), with and without fiberglass reinforcement (Fg). Eighty teeth were selected, being 40 bovine incisors, 20 human premolars and 20 molars. Bovine incisors were ground to get a platform, simulating an occlusal surface of human molar. Teeth in pairs were embedded in polystyrene resin, simulating the periodontal ligament and divided in 4 groups: B-Cpd-Fg: bovine teeth restored with Cpd with Fg; B-Cpd-NFg: bovine teeth restored with Cpd without Fg; H-Cpd-Fg: human teeth restored Cpd with Fg; and H-Cpd-NFg: human teeth restored with Cpd without Fg. The Cpd were adhesively fixed and submitted to an axial compression load at the pontic center with a crosshead speed of 0.5 mm/min until fracture. Failure modes were assessed and classified. Data were subjected to two-way ANOVA and Tukey's HSD test (α=0.05). The tooth type had no influence on fracture strength and fracture mode. The inclusion of fiberglass increased significantly the fracture strength. The failure modes were more reparable in groups with fiber-reinforcement. Bovine teeth can be used as a substitute for human teeth in these types of fracture strength tests.

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Section: Discussionmentioning

confidence: 99%

Fracture strength of composite fixed partial denture using bovine teeth as a substitute for human teeth with or without fiber-reinforcement

et al. 2010

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“…Regarding root dentin, it has been suggested that by having a significantly higher tubule density, the bovine substrate seems to be a less suitable substitute for human root dentin (13). In fact, bovine root dentin has been shown to have lower microhardness than the human counterpart (14).…”

Section: Viability Of Using Enamel and Dentin From Bovine Origin As Amentioning

confidence: 99%

Viability of using enamel and dentin from bovine origin as a substitute for human counterparts in an intraoral erosion model

et al. 2010

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This study ascertained whether under dental erosion models that closely mimics the real-life situation enamel and root dentin from bovine origin would be reliable substitutes for human counterparts. Through a 2x2 crossover design, in a first trial, 14 volunteers wore a palatal device containing slabs of bovine and human enamel. Half of the participants ingested (4x daily, for 10 days) orange juice first, crossing over to mineral water, while the remainder received the reverse sequence. In a second trial, volunteers wore devices with slabs of bovine and human root dentin. Except for the duration of each intraoral phase, which lasted 2 rather 10 days, the experiment with root dentin run exactly as for enamel. Dental substrates were analyzed for surface microhardness. Two-way ANOVAs (α=0.05) indicated no difference between the microhardness values recorded for human and bovine enamel (p=0.1350), but bovine root dentin had lower microhardness compared to its human counterpart (p=0.0432). While bovine enamel can reliably substitute its human counterpart in in situ dental erosion models, bovine root dentin does not seem to be a viable alternative to the corresponding human tissue.

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“…In addition, recent studies have reported that the structure of human and bovine dentin is very similar. 18,19 Therefore, in this preliminary investigation the fatigue and fracture properties of bovine dentin have been evaluated as a model for human dentin. The study is ongoing and these preliminary results are being used in refining the …”

Section: Introductionmentioning

confidence: 99%

Fatigue and fracture of bovine dentin

Arola

Rouland

Zhang

2002

Experimental Mechanics

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ABSTRACT-In this paper, the fatigue and fracture properties of bovine dentin are evaluated using in vitro experimental analyses. Double cantilever beam (DCB) specimens were prepared from bovine maxillary molars and subjected to zeroto-tension cyclic loads. The fatigue crack growth rate was evaluated as a function of the dentin tubule orientation using the Paris law. Wedge-loaded DCB specimens were also prepared and subjected to monotonic opening loads. Moiré interferometry was used to acquire the in-plane displacement field during stable crack growth, and the instantaneous wedge load and crack length were acquired to evaluate the crack growth resistance and crack tip opening displacement (CTOD) with crack extension. The rate of fatigue crack growth was generally larger for crack propagation occurring perpendicular to the dentin tubules. The Moiré fringe fields documented during monotonic crack growth exhibited non-linear deformation occurring within a confined region adjacent to the crack tip. Both the wedge load and CTOD response provided evidence that a fracture process zone contributes to energy dissipation during crack extension and that dentin exhibits a rising R-curve behavior. Results from this preliminary investigation are being used as a guide for an evaluation of the fatigue and fracture properties of human dentin.

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Comparison of the number and diameter of dentinal tubules in human and bovine dentine by scanning electron microscopic investigation

Cited by 337 publications

References 19 publications

Fracture strength of composite fixed partial denture using bovine teeth as a substitute for human teeth with or without fiber-reinforcement

Fracture strength of composite fixed partial denture using bovine teeth as a substitute for human teeth with or without fiber-reinforcement

Viability of using enamel and dentin from bovine origin as a substitute for human counterparts in an intraoral erosion model

Fatigue and fracture of bovine dentin

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