Measurement of the force required to extract the mandibular incisor of rats of various ages

Chiba, M.; Ohshima, S.; Takizawa, K.

doi:10.1016/0003-9969(80)90101-6

Cited by 28 publications

(15 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5), the safety margin for the rat incisor periodontal ligament is calculated as 4.7 (1.57 MPa/0.335 MPa). Furthermore, the safety margin can be estimated using the ultimate load required to extract the rat mandibular incisor from its socket (52.0 N on average in rats of similar age; Chiba et al, 1980). Then, the safety margin is calculated as 2.1 (ultimate load/ maximal biting load ϭ 52.0 N/24.3 N).…”

Section: Discussionmentioning

confidence: 99%

Comparison of biomechanical properties of the incisor periodontal ligament among different species

et al. 1998

Self Cite

View full text Add to dashboard Cite

These results suggest that the regional differences in the biomechanical properties of the periodontal ligament depend upon the developmental stages of the periodontal collagen fibers that may be related to the general arrangement, diameters, and densities of the collagen fiber bundles and the fiber insertions into the alveolar bone and cementum. The species differences in the biomechanical properties may be due to differences in the width of the periodontal ligament and the waviness as well as the strength and stiffness of the periodontal collagen fibers.

show abstract

Section: Discussionmentioning

confidence: 99%

Comparison of biomechanical properties of the incisor periodontal ligament among different species

et al. 1998

Self Cite

View full text Add to dashboard Cite

show abstract

“…It has been demonstrated by Chiba et al [1980] that the maximum load required to extract the continuously growing rat incisor from its socket increased markedly with age from 4 to 24 weeks and that a high correlation was found between the ultimate load and the mandible weight. They suggested that the surface areas of the ligament increased with growth of the jaw and tooth and that the binding between them became stronger.…”

Section: Discussionmentioning

confidence: 99%

“…1981;Burstein et al, 1976;Danielsen & Andreassen, 1988;Diamant etal., 1972;Fry et al, 1964;Svendsen & Thomson, 1984;Vogel, 1980Vogel, , 1989. It has been demonstrated that the ultimate load required to extract a rat incisor from its socket increased gradually with age from 4 to 24 weeks [Chiba et al, 1980]. It has also been shown that factors such as occlusion and certain types of drugs affect the ultimate load required to extract a tooth from its socket [Chiba et al, 1981a, b;Ohshima, 1982].…”

mentioning

confidence: 99%

The Effect of Age on the Mechanical Properties of the Periodontal Ligament in the Incisor Teeth of Growing Young Rats¹

Yamane

1990

Gerodontology

View full text Add to dashboard Cite

Mechanical properties of the periodontal ligament of the incisor have been examined by pushing the tooth out of its surrounding alveolar bone in sections of the mandibles of rats from 3 to 24 weeks of age. The maximum load, failure energy in shear and elastic stiffness estimated from the load-deformation curves, showed a tendency to increase with age from 3 to 12 weeks but the maximum deformation did not. Age-related changes were not appreciable in all mechanical measures estimated from the stress-strain curves. It is suggested that increases in the maximum load and elastic stiffness from the load-deformation curves with age are closely related to those in the size of teeth or in the area of the periodontal ligament facing cementum. It is also suggested that qualitative and quantitative changes in the supporting tissues or in the collagen fibres/unit area of the periodontal ligament are minor from 3 to 24 weeks of age in the rat mandibular incisor.

show abstract

“…They reported the force required to extract a tooth from its socket using specimens from human unembalmed cadavers (Table 1). Using a similar technique (Figure 1), Chiba and his colleagues measured the force required to extract teeth on the normal (Table 1) and experimentally altered PDL in experimental animals [6, 9]. Since these raw values showed a rather simple association with tooth size, standardised values for mechanical strengths (N/mm 2 ) of the PDL per area facing the roots were then calculated [5] (Table 2).…”

Section: The Mechanical Strength Of the Pdlmentioning

confidence: 99%

Mechanical Strength and Viscoelastic Response of the Periodontal Ligament in Relation to Structure

Komatsu¹

2010

Journal of Dental Biomechanics

View full text Add to dashboard Cite

The mechanical strength of the periodontal ligament (PDL) was first measured as force required to extract a tooth from its socket using human specimens. Thereafter, tooth-PDL-bone preparations have extensively been used for measurement of the mechanical response of the PDL. In vitro treatments of such specimens with specific enzymes allowed one to investigate into the roles of the structural components in the mechanical support of the PDL. The viscoelastic responses of the PDL may be examined by analysis of the stress-relaxation. Video polarised microscopy suggested that the collagen molecules and fibrils in the stretched fibre bundles progressively align along the deformation direction during the relaxation. The stress-relaxation process of the PDL can be well expressed by a function with three exponential decay terms. Analysis after in vitro digestion of the collagen fibres by collagenase revealed that the collagen fibre components may play an important role in the long-term relaxation component of the stress-relaxation process of the PDL. The dynamic measurements of the viscoelastic properties of the PDL have recently suggested that the PDL can absorb more energy in compression than in shear and tension. These viscoelastic mechanisms of the PDL tissue could reduce the risk of injury to the PDL.

show abstract

Measurement of the force required to extract the mandibular incisor of rats of various ages

Cited by 28 publications

References 13 publications

Comparison of biomechanical properties of the incisor periodontal ligament among different species

Comparison of biomechanical properties of the incisor periodontal ligament among different species

The Effect of Age on the Mechanical Properties of the Periodontal Ligament in the Incisor Teeth of Growing Young Rats¹

Mechanical Strength and Viscoelastic Response of the Periodontal Ligament in Relation to Structure

Contact Info

Product

Resources

About

Measurement of the force required to extract the mandibular incisor of rats of various ages

Cited by 28 publications

References 13 publications

Comparison of biomechanical properties of the incisor periodontal ligament among different species

Comparison of biomechanical properties of the incisor periodontal ligament among different species

The Effect of Age on the Mechanical Properties of the Periodontal Ligament in the Incisor Teeth of Growing Young Rats1

Mechanical Strength and Viscoelastic Response of the Periodontal Ligament in Relation to Structure

Contact Info

Product

Resources

About

The Effect of Age on the Mechanical Properties of the Periodontal Ligament in the Incisor Teeth of Growing Young Rats¹