Abstract

Introduction: Mineral trioxide aggregate (MTA) fulfills many of the ideal properties of a root end filling material and repair material for furcal perforation. However, its low cohesive property often makes it difficult to handle. To improve the handling properties of MTA root canal filling materials, MTA-like cement was made, and calcium lactate gluconate (CLG) aqueous solution was used to shorten the setting time and enhance the paste viscosity. Methods: CLG solution was prepared by mixing lactic acid, glucono delta lactone, and calcium oxide by wet process. The crystalline property of the CLG powder was characterized by x-ray diffraction. The MTA-like cements were prepared by mixing Portland cement/bismuth oxide/gypsum (75/20/5); ProRoot white MTA (Dentsply Tulsa Dental, Tulsa, OK) was used as a control group. The influence of various liquid phases on initial setting time, handling properties, and pH value were investigated by a Vicat needle, questionnaire of operational hand feel, and pH meter, respectively. Results: By using 23.1wt% CLG solutions as a liquid phase, the setting time of white MTA was significantly decreased from 155.5 ± 5.0 to 12.3 ± 2.5 minutes. The pH values for hydrated white MTA with deionized water and 23.1 wt% CLG solutions were 12.29 ± 0.02 and 11.81 ± 0.04 at 72 hours. Conclusions: The results suggest that the addition of amorphous CLG-based liquid phase provides improvement in sealing ability as well as clinical manageability of dental filling materials.

Original languageEnglish
Pages (from-to)1292-1295
Number of pages4
JournalJournal of Endodontics
Volume35
Issue number9
DOIs
Publication statusPublished - Sep 2009

Fingerprint

Dental Materials
Calcium Gluconate
Root Canal Filling Materials
Calcium Sulfate
Lactones
Ointments
mineral trioxide aggregate
Viscosity
Powders
Needles
calcium lactate
Lactic Acid
Tooth
Hand
X-Rays
Control Groups
Water

Keywords

  • Calcium lactate gluconate
  • mineral trioxide aggregate

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

A Novel Accelerator for Improving the Handling Properties of Dental Filling Materials. / Hsieh, Sung Chih; Teng, Nai Chia; Lin, Yu Chen; Lee, Pei Ying; Ji, Dian Yu; Chen, Chien Chung; Ke, En Sheng; Lee, Sheng Yang; Yang, Jen Chang.

In: Journal of Endodontics, Vol. 35, No. 9, 09.2009, p. 1292-1295.

Research output: Contribution to journalArticle

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abstract = "Introduction: Mineral trioxide aggregate (MTA) fulfills many of the ideal properties of a root end filling material and repair material for furcal perforation. However, its low cohesive property often makes it difficult to handle. To improve the handling properties of MTA root canal filling materials, MTA-like cement was made, and calcium lactate gluconate (CLG) aqueous solution was used to shorten the setting time and enhance the paste viscosity. Methods: CLG solution was prepared by mixing lactic acid, glucono delta lactone, and calcium oxide by wet process. The crystalline property of the CLG powder was characterized by x-ray diffraction. The MTA-like cements were prepared by mixing Portland cement/bismuth oxide/gypsum (75/20/5); ProRoot white MTA (Dentsply Tulsa Dental, Tulsa, OK) was used as a control group. The influence of various liquid phases on initial setting time, handling properties, and pH value were investigated by a Vicat needle, questionnaire of operational hand feel, and pH meter, respectively. Results: By using 23.1wt{\%} CLG solutions as a liquid phase, the setting time of white MTA was significantly decreased from 155.5 ± 5.0 to 12.3 ± 2.5 minutes. The pH values for hydrated white MTA with deionized water and 23.1 wt{\%} CLG solutions were 12.29 ± 0.02 and 11.81 ± 0.04 at 72 hours. Conclusions: The results suggest that the addition of amorphous CLG-based liquid phase provides improvement in sealing ability as well as clinical manageability of dental filling materials.",
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AU - Teng, Nai Chia

AU - Lin, Yu Chen

AU - Lee, Pei Ying

AU - Ji, Dian Yu

AU - Chen, Chien Chung

AU - Ke, En Sheng

AU - Lee, Sheng Yang

AU - Yang, Jen Chang

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N2 - Introduction: Mineral trioxide aggregate (MTA) fulfills many of the ideal properties of a root end filling material and repair material for furcal perforation. However, its low cohesive property often makes it difficult to handle. To improve the handling properties of MTA root canal filling materials, MTA-like cement was made, and calcium lactate gluconate (CLG) aqueous solution was used to shorten the setting time and enhance the paste viscosity. Methods: CLG solution was prepared by mixing lactic acid, glucono delta lactone, and calcium oxide by wet process. The crystalline property of the CLG powder was characterized by x-ray diffraction. The MTA-like cements were prepared by mixing Portland cement/bismuth oxide/gypsum (75/20/5); ProRoot white MTA (Dentsply Tulsa Dental, Tulsa, OK) was used as a control group. The influence of various liquid phases on initial setting time, handling properties, and pH value were investigated by a Vicat needle, questionnaire of operational hand feel, and pH meter, respectively. Results: By using 23.1wt% CLG solutions as a liquid phase, the setting time of white MTA was significantly decreased from 155.5 ± 5.0 to 12.3 ± 2.5 minutes. The pH values for hydrated white MTA with deionized water and 23.1 wt% CLG solutions were 12.29 ± 0.02 and 11.81 ± 0.04 at 72 hours. Conclusions: The results suggest that the addition of amorphous CLG-based liquid phase provides improvement in sealing ability as well as clinical manageability of dental filling materials.

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