Further ultrastructural studies on the temporomandibular joint of the guinea pig

Silva, Douglas G.

doi:10.1016/s0022-5320(69)90041-0

Cited by 29 publications

(10 citation statements)

References 21 publications

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“…One of the studies also indicated that elastogenesis proceeds in the sequence of oxytalan fibers in the v.p. Whether the tensile and spreading forces applied to the joint and masticatory compressive forces are absorbed solely by the collagen fibers, has been discussed in a study on the aging TMJ, because the laminated collagen fibers have a tensile strength less than that of branched elastin fibers: the collagen fibers can be stretched to only an additional 10% of the original length, while the leastin fibers can be stretched to 2-to 2.5-fold their original length (Silva 1969;Fujita and Fujita 1981). The aging healthy TMJ has been reported to contain layers of elastic fibers in various sizes that act as a broad-band resorber (Silva 1969).…”

Section: Discussionmentioning

confidence: 99%

“…Whether the tensile and spreading forces applied to the joint and masticatory compressive forces are absorbed solely by the collagen fibers, has been discussed in a study on the aging TMJ, because the laminated collagen fibers have a tensile strength less than that of branched elastin fibers: the collagen fibers can be stretched to only an additional 10% of the original length, while the leastin fibers can be stretched to 2-to 2.5-fold their original length (Silva 1969;Fujita and Fujita 1981). The aging healthy TMJ has been reported to contain layers of elastic fibers in various sizes that act as a broad-band resorber (Silva 1969). However, a pathologic study of the TMJ has shown that fragmentation of the disintegrated collagen network and stress elastosis related to mechanical failure were characteristic of the osteoarthrotic fibrocartilage but not the hyaline cartilage (de Bont et al 1985).…”

Section: Discussionmentioning

confidence: 99%

“…Our study indicated that when the immature TMJ and the SVJ gradually remodeled the hypertrophic cartilage that covered loading-bearing surfaces, the incudomalleal and -stapedial joints had already become mature, showing nonhypertrophic configurations in their articular cartilages within the first postnatal week. However, when the SVJ entered the mature and nonhypertrophic phase, having ossified almost completed and leaving only the articular surfaces of the adjoining bones with a thin layer of cartilage during the second postnatal week, the mandibular condyle was still immature and was distributed with arborizing blood vessels during the fourth postnatal week (Moffett et al 1964;Silva 1969). In studying the fine structure of the elastic system fibers in both of the joints derived from the first and secondary cartilages, we noticed the incudo-malleal and -stapedial joints, which originated from clefts between the embryonic hyaline cartilaginous ossicular chain, contained mainly elastic fibers, while the capsular tissue of both the TMJ and the SVJ, including the annular ligament, was composed of the secondary cartilaginous tissue of mesenchymal origin containing many collagen fibers and pre-elastic fibers, which is believed to be more resistant to mechanical stress (Blackwood 1966).…”

Section: Discussionmentioning

confidence: 99%

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Developmental Anatomy of the Mouse Stapediovestibular and Temporomandibular Joints

Okumura

Iwai-Liao

1993

Okajimas Folia Anatomica Japonica

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Summary: The genesis, development and growth of the mouse stapediovestibular joint (SVJ), which contains the annular ligament, and the temporomandibular joint (TMJ) were examined in an attempt to study the stress-bearing articular tissue that is thought to be derived from embryonic mesenchyme; the findings were also compared with those in the ossicular joints. The following conclusions were obtained: 1) The articular cartilage of the mandibular condylar process, stapedial foot plate and otic capsule is derived from fetal fibrous articular tissue. 2) The fetal TMJ developed into a typical double diarthroses containing an articular disc.3) The fetal syndesmodial SVJ differentiated into the annular ligament containing characteristic palisade-like fibroblasts and hammock-like fibers; no interzone formation or synovial cavities were observed in the completed and mature syndesmodial SVJ. 4) Like the TMJ, the major elastic system fibers in the annular ligament were also mechanical-resistant elaunin. 5) Elastogenesis was closely related to functional and mechanical factors in the auditory ossicular chain, TMJ and annular ligament; the mature incudomalleal and incudostapedial joints contained mainly mature elastic fibers, but the mature SVJ and immature TMJ contained mainly pre-elastic elaunin fibers. 6) Stress elastosis, turnover of the fibrillar component and age changes in cellular and fibrous components were not evident in either the mature SVJ or the young functional TMJ.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Developmental Anatomy of the Mouse Stapediovestibular and Temporomandibular Joints

Okumura

Iwai-Liao

1993

Okajimas Folia Anatomica Japonica

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“…Furthermore, the mature elastic fibers (true elastin) containing mainly elastin are a shock absorber for stretch and compression, while the preelastic oxytalan microfibrils are closely related to mechanical resistance (Silva 1969; Cotta-Pereira, Rodrigo and Bittencourt-Sampaio 1976; Sakai, Keene and Engvall 1986, Kostovi6-KenIevid, Bradamante and Svajger 1986). The present study suggested that fibril diameter distribution was an important factor to determine the properties of the ESFs in that thick ESFs were more distinct in the articular disc.…”

Section: Sem Using Collagen Digestion Methodsmentioning

confidence: 99%

“…Elastogenesis is a process involving impregnation of microfibrils with amorphous elastin, leading to thickening and maturation of the ESFs (Silva 1969; Cotta-Pereira, Rodrigo and Bittencourt-Sampaio 1976; Kostovie-KenZevid, Bradamante and Svajger 1986; Sakai, Keene and Engvall 1986). However, the present study observed a preferential distribution of pre-elastic fibers in the mandibular joint.…”

Section: Sem Using Collagen Digestion Methodsmentioning

confidence: 99%

Scanning Electron Microscopy of Elastic System Fibers in the Articular Disc of the Rat Mandibular Joint

Iwai-Liao

Ogita

Tsubai

et al. 1994

Okajimas Folia Anatomica Japonica

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Summary: Elastic system fibers (ESFs), i.e., microfibrils (putative oxytalan fibers), elaunin and elastic (true elastin) fibers, in the rat mandibular joint were studied mainly using scanning electron microscopy (SEM) and light microscopy (LM) with the aid of image processing. The present quantitative analysis using LM showed that the articular disc and capsule, which are the sites that receive physical compressive force during mastication, contained more ESFs than the articular cartilage of the mandibular joint. In addition, oxytalan fibers were the principal ESFs in all the articular components (capsule, articular disc, supraosseous layer of articular surfaces and articular cartilage). Subsequently, ESFs in the articular disc, which contained more thick ESFs, were closely examined by SEM using both collagen-and elastin-digestion methods. SEM showed networks of microfibrils beneath the articular surfaces (superior and inferior layers) in the thin central portion of the articular disc; the principal microfibrils ran at nearly right angles to the collagen fibers. The microfibrils were cemented with amorphous elastin, thickened and shifted towards interconnecting oblique fibers and many main ESF trunks, which were oriented in the direction of the layered wavy collagen fibers and parallel to the direction of applied force, to sustain the mechanical force. From the superior and inferior layers, the main ESFs shisfted towards the middle portion of the disc, transitional zone (synovial osteochondral junction) and the other articular components, showing no specific directivity. Transmission mission electron microscopy revealed that the thick main ESFs in the elastic network were elaunin fibers. The present study indicated that ESFs unite, branch and therefore construct an extensive and complicated protective stretchable network, which is interposed with the less tensible collagen network in the mandibular articular disc.Elastin system fibers (ESFs), which are usually differentiated as microfibrils (oxytalan fibers), elaunin and elastic fibers based on their staining properties and the distribution of the microfibrils and amorphous cementing elastin, play a particularly important role in the elasticity of connective tissue (CottaPereira,

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The microscopic structure of fibrous articular surfaces: A review

Wilson

Gardner

1984

Anat. Rec.

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The present knowledge of the microscopic structure of fibrous articulating surface is reviewed. The influence of dissection, postmortem change, fixation, and dehydration on the microscopic appearances of these surfaces is considered. The results of those studies of surface morphology that investigate intact, supported specimens and that are controlled by surveys of fresh, unfixed, or frozen material are advantageous. New information on the effects of alterations in intermaxillary relationship on the morphology of fibrous articulating surfaces is presented. There is need for further work in this field of research.

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Further ultrastructural studies on the temporomandibular joint of the guinea pig

Cited by 29 publications

References 21 publications

Developmental Anatomy of the Mouse Stapediovestibular and Temporomandibular Joints

Developmental Anatomy of the Mouse Stapediovestibular and Temporomandibular Joints

Scanning Electron Microscopy of Elastic System Fibers in the Articular Disc of the Rat Mandibular Joint

The microscopic structure of fibrous articular surfaces: A review

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