Abstract:
:Recent studies have accomplished the establishment of a collagenous fiber-fringe matrix upon dental root surfaces in vitro. The present study was undertaken to follow the development of such a matrix in vitro and to test the possible effects of root surface treatments upon this matrix. Periodontal ligament cells, 0.1 to 0.2-mm thick dental root discs, and alveolar bone cells were derived after extraction from four partially erupted third molars and the accompanying interradicular bony septa of 1 male patient. Autologous serum was obtained by venipuncture. Cultures were initiated by delivering a 1-ml suspension of 50,000 tritiated thymidine-labeled periodontal ligament cells and 50,000 alveolar bone cells onto each of 42 culture sets. The following day, demineralized or non-demineralized root discs treated with autologous serum, fibronectin or complete medium were placed in pairs, separated by a 0.1-1.0 mm gap, upon the initial cell layer. Representative cultures were terminated after 2, 3, 4, 5 and 6 weeks, and processed for light- and electron microscopy, morphometric analysis and autoradiography. An outstanding feature of the early cultures (2, 3 and 4 weeks) was a patchwise, random distribution of matrix making a precise developmental study impossible, although collagen fibrils were produced within the first 2 weeks. Some 3-week cultures already demonstrated a mature fiber-fringe characterized electron-microscopically as oriented, densely packed collagen fibrils closely abutting the cementum-lined root discs. The treatments (including autologous serum) used in this study had no appreciable morphologic or morphometric effect upon the fiber-fringe formed. Because none of the cultures in the present or past studies have demonstrated a true cementoid matrix, this model may not be suitable for the in-vitro study of cementum formation.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Bernstein AB,Preisig E,Pajarola G,Schroeder HEdoi
10.1007/BF00223152subject
Has Abstractpub_date
1989-10-01 00:00:00pages
125-35issue
1eissn
0302-766Xissn
1432-0878journal_volume
258pub_type
杂志文章abstract::Neurons displaying FMRFamide(Phe - Met - Arg - Phe - NH2)-like immunoreactivity have recently been implicated in neural plasticity in salmon. We now extend these findings by describing the extent of the FMRF-like immunoreactive (FMRF-IR) system in the brain, retina and olfactory system of sockeye salmon parr using the...
journal_title:Cell and tissue research
pub_type: 杂志文章
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abstract::A quantitative evaluation of putative amino acid neurotransmitters in sea pansy polyps by high-performance liquid chromatography indicates that the taurine content exceeds that of other amino acids by a 100-fold. The cellular source of this taurine was investigated by immunohistochemistry with two polyclonal antisera ...
journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
pub_type: 杂志文章
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journal_title:Cell and tissue research
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更新日期:1987-06-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1976-07-30 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1976-02-06 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1988-07-01 00:00:00
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
pub_type: 杂志文章
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journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00237724
更新日期:1979-06-08 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00214002
更新日期:1988-03-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
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journal_title:Cell and tissue research
pub_type: 杂志文章
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journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00232768
更新日期:1980-01-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00222069
更新日期:1975-01-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00229200
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1981-01-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00219927
更新日期:1980-01-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1994-11-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1982-01-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章,评审
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更新日期:1997-11-01 00:00:00