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1.
J. appl. oral sci ; 27: e20180247, 2019. tab, graf
Article in English | LILACS, BBO | ID: biblio-975879

ABSTRACT

Abstract Objective This study aimed to investigate the effects of dodecacalcium hepta-aluminate (C12A7) content on some physicochemical properties and cytocompatibility of tricalcium silicate (C3S) cement using human dental pulp cells (hDPCs). Material and Methods High purity C3S cement was manufactured by a solid phase method. C12A7 was mixed with the cement in proportions of 0, 5, 8, and 10 wt% (C12A7-0, −5, −8, and −10, respectively). Physicochemical properties including initial setting time, compressive strength, and alkalinity were evaluated. Cytocompatibility was assessed with cell viability tests and cell number counts. Statistical analysis was performed by using one-way analysis of variance (ANOVA) and Tukey's test (p<0.05). Results The initial setting time of C3S-based cement was shorter in the presence of C12A7 (p<0.05). After 1 day, C12A7-5 showed significantly higher compressive strength than the other groups (p<0.05). After 7 days, the compressive strength of C12A7-5 was similar to that of C12A7-0, whereas other groups showed strength lower than C12A7-0. The pH values of all tested groups showed no significant differences after 1 day (p>0.05). The C12A7-5 group showed similar cell viability to the C12A7-0 group (p>0.05), while the other experimental groups showed lower values compared to C12A7-0 group (p<0.05). The number of cells grown on the C12A7-5 specimen was higher than that on C12A7-8 and −10 (p<0.05). Conclusions The addition of C12A7 to C3S cement at a proportion of 5% resulted in rapid initial setting time and higher compressive strength with no adverse effects on cytocompatibility.


Subject(s)
Humans , Silicates/chemistry , Calcium Compounds/chemistry , Aluminum Compounds/chemistry , Dental Cements/chemistry , Dental Pulp Cavity/cytology , Particle Size , Reference Values , Time Factors , X-Ray Diffraction , Biocompatible Materials/pharmacology , Biocompatible Materials/chemistry , Materials Testing , Microscopy, Electron, Scanning , Cell Survival/drug effects , Cells, Cultured , Reproducibility of Results , Silicates/pharmacology , Calcium Compounds/pharmacology , Aluminum Compounds/pharmacology , Compressive Strength , Dental Cements/pharmacology , Dental Pulp Cavity/drug effects
2.
Rev. Fac. Odontol. Univ. Chile ; 12(1): 29-40, ene.-jun. 1994. ilus
Article in Spanish | LILACS | ID: lil-148449

ABSTRACT

La utilización de mediadores bioquímicos en la regeneración de tejidos periodontales, abre una interesante perspectiva en el propósito de obtener un mayor procentaje de nueva inserción en relación a la regeneración tisular guiada. En el presente estudio se comparó el efecto de estos mediadores bioquímicos cuando se usan solos o combinados con la técnica de regeneración tisular guiada (QTG). Material y Métodos: 10 perros adultos jóvenes con lesiones periodontales > de 4mm. en los premolares inferiores. Estas lesiones fueron tratadas con RTG más ácido cítrico o tetraciclina y fibronectina en un lado y con cirugía convencional (colgajo) y ácido cítrico o tetraciclina y ficronectina en el lado contrario. Se evaluaron resultados clínicos e histológicos a los 7,15,30,60 y 90 días. Clínicamente a los 90 días se observa menor profundidad del crévice y mayor ganancia de inserción clínica en los casos en que utilizó la RTG en conjunto con los condicionadores rediculares y la fibronectina. Histológicamente también se observa mayor regeneración de tejidos periodontales incluyendo neoformación ósea en la RTG combinada con condicionadores y fibronectina. Como conclusión se puede afirmar que el uso de los mediadores bioquímicos en la regeneración periodontal, es efectivo cuando se combinan con la técnica de RTG


Subject(s)
Animals , Dogs , Dental Pulp Cavity/cytology , Fibronectins/therapeutic use , Guided Tissue Regeneration , Bicuspid/injuries , Mandible/anatomy & histology , Root Canal Therapy , Surgical Flaps , Tetracycline
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