Cortical bone structure of the pig mandible

Powell, K.; Atkinson, Peter J.; Woodhead, Christopher

doi:10.1016/0003-9969(73)90136-2

Cited by 17 publications

(12 citation statements)

References 5 publications

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“…Data on the ultimate strength (Robertson and Smith, 1978) and density (Powell et al, 1973) are available for the mandibles of pigs. Bromage (1992b) has presented information on collagen fibril orientation in macaque mandibles, and Bacon et al (1980) have presented information on apatite crystal orientation in an edentulous human mandible; both of these features are thought to be important microstructural determinants of osseus material properties (Ascenzi, 1988).…”

mentioning

confidence: 99%

Elastic properties of human supraorbital and mandibular bone

Dechow

Nail

Schwartz-Dabney

et al. 1993

American J Phys Anthropol

151

129

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Elastic constants, including the elastic modulus, the shear modulus, and Poisson's ratio, were measured on human craniofacial bone specimens obtained from the supraorbital region and the buccal surfaces of the mandibles of unembalmed cadavers. Constants were determined using an ultrasonic wave technique in three directions relative to the surface of each sample: 1) normal, 2) tangential, and 3) longitudinal. Statistical analysis of these elastic constants indicated that significant differences in the relative proportions of elastic properties existed between the regions. Bone from the mandible along its longitudinal axis was stiffer than bone from the supraorbital region. Directional differences in both locations demonstrated that cranial bone was not elastically isotropic. It is suggested that differences in elastic properties correspond to regional differences in function.

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mentioning

confidence: 99%

Elastic properties of human supraorbital and mandibular bone

Dechow

Nail

Schwartz-Dabney

et al. 1993

American J Phys Anthropol

151

129

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“…Younger pigs also showed fibrolamellar structure surrounding the erupting first molars, however, it was less dense and more finely reticulated than the older bone. A previous study of the mandibular cortex in growing pigs demonstrated a plexiform structure that regionally varied in porosity (Powell et al., 1973), suggesting that this structure may characterize rapidly growing porcine bone. Although the alveolar bone proper is typically described as including lamellar tissue, it was not so in these animals.…”

Section: Discussionmentioning

confidence: 92%

“…This study aims to define the eruptive transition in pig alveolar bone through molecular and structural assessment at the mucosal penetration stage of tooth eruption and at the onset of functional occlusion. Although pig mandibular bone has been studied previously (Powell et al., 1973), most work focused on the cortex and structural studies of large animal alveolar bone has been pursued in dogs (Marks and Cahill, 1986; Pilipili et al., 1998; Huja et al., 2006; Deguchi et al., 2008). Although several studies have addressed gene expression in porcine bone marrow mesenchymal stem cells in vitro (Zou et al., 2004; Bosch et al., 2006; Zeng et al., 2006), gene expression in pig alveolar bone remains undescribed in vivo.…”

Section: Introductionmentioning

confidence: 99%

Molecular and Structural Assessment of Alveolar Bone During Tooth Eruption and Function in the Miniature Pig, Sus Scrofa

Yeh

Popowics

2011

Anatomia, Histologia, Embryologia

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SummaryThe development of alveolar bone adjacent to the tooth root during tooth eruption is not well understood. This study tested the hypothesis that predominantly woven bone forms adjacent to tooth roots during tooth eruption, but that this immature structure transitions to lamellar bone when the tooth comes into function. Additionally, bone resorption was predicted to play a key role in transitioning immature bone to more mature, load-bearing tissue. Miniature pigs were compared at two occlusal stages, 13 weeks (n=3), corresponding with the mucosal penetration stage of M 1 tooth eruption, and 23 weeks (n=3), corresponding with early occlusion of M 1 /M 1 . Bone samples for RNA extraction and qRT-PCR analysis were harvested from the diastema and adjacent to M 1 roots on one side. Following euthanasia, bone samples for hematoxylin and eosin and TRAP staining were harvested from these regions on the other side. In contrast to expectations, both erupting and functioning molars had reticular fibrolamellar structure in alveolar bone adjacent to M 1 . However, the woven bone matrix in older pigs was thicker and had denser primary osteons. Gene expression data and osteoclast cell counts showed a tendency for more bone resorptive activity near the molars than at distant sites, but no differences between eruptive stages. Thus, although resorption does occur, it is not a primary mechanism in the transition in alveolar bone from eruption to function. Incremental growth of existing woven bone and filling in of primary osteons within the mineralized scaffold generated the fortification necessary to support an erupted and functioning tooth.

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“…Con respecto a las diferencias morfológicas e histológicas entre el hueso de cerdo y humano, muchos autores [15][16][17] relataron que tanto la densidad como el metabolismo óseo son similares, un hecho que ha estimulado nuevos estudios de la densidad ósea en los cerdos, como los realizados por Robertson et al 18 , que evaluaron densitométricamente el proceso de cicatrización de la mandíbula de cerdos después de la osteotomía; por Christgau et al 19 , que utilizaron los rayos X por sustracción digital para encontrar los cambios cuantitativos en la densidad y los cambios en la masa de calcio en mandíbula; por Holtzhauer et al 20 , que estudiaron la densidad ósea radiográfica de los defectos de distracción osteogénica, y por Trento 21 , que estudió la densidad ósea en la mandíbula de los cerdos sometidos a un injerto de hueso autógeno, homogéneos y heterogéneos.…”

Section: Discussionunclassified

“…Este estudio utilizó cerdos de aproximadamente 3 meses en que el factor hormonal no tenía importancia, ya que se sabe que hay diferencias en densidades óseas debido a acción hormonal en machos y hembras 16,22 , y además no se hizo la comparación entre los animales, pero sí la comparación entre los pozos en el mismo animal.…”

Section: Discussionunclassified