Further characterization of tetracycline's quantitative binding to dentin
Unerupted human third molar crown segments were used to measure the change in the concentration of 3H-tetracycline that occurs when it moves across dentin from pulpal to occlusal surfaces. When 1.25, 2.5, and 5×10 −5 M 3H-tetracycline were filtered across dentin, binding increased by 21, 51, and 69%...
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Veröffentlicht in: | Journal of endodontics 1989-08, Vol.15 (8), p.335-338 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Unerupted human third molar crown segments were used to measure the change in the concentration of
3H-tetracycline that occurs when it moves across dentin from pulpal to occlusal surfaces. When 1.25, 2.5, and 5×10
−5
M
3H-tetracycline were filtered across dentin, binding increased by 21, 51, and 69%, respectively. When the same concentrations of
3H-tetracycline were preloaded onto crown segments and eluted with 1.1×10
−3
M nonradioactive tetracycline, the percentage of elution of
3H-tetracycline was not significantly different over time. When preloaded
3H-tetracycline was displaced by diffusion with water or 1.1×10
−3
M nonradioactive tetracycline, there were no significant differences. There was a significant difference between the rate of displacement of 1.25×10
−5
M
3H-tetracycline and the other two preloaded concentrations when 5.8×10
−4
M
3H-tetracycline/tetracycline was used as the eluant. These data suggest that the binding of
3H-tetracycline to dentin was concentration dependent and that
3H-tetracycline binds nonspecifically and reversibly. |
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ISSN: | 0099-2399 1878-3554 |
DOI: | 10.1016/S0099-2399(89)80068-8 |