The function of biomaterials has been to replace infected or injured tissues. The first used biomaterials were bioinert, thus minimizing formation of scar tissue at the interface with host tissues. Bioglass was discovered in 1969. Larry Hench developed Bioglass 45S5, which was the earliest synthetic substance that was bonded chemically with bone. In recent researches it has appeared that Bioglass bonds with bone more readily than other bioceramics; it also indicated that the osteogenic properties are due to stimulation of osteoprogenitor cells by the dissolution products formed from Bioglass. Bioglass is chemically calcium sodium phosphosilicate, which is capable of forming an active chemical bond with the tissues. Bioglass is particularly biocompatible which, when placed in body cavity or on reacting with body stimulating factors, induces hydroxyapatite formation. This paper reviews Bioglass as a material of modern dentistry and its various applications in modern dentistry. It also discusses its composition, methods of preparation, and mechanism of action, along with its advantages and disadvantages.
The advent of dentin adhesive technology in endodontics has made monoblock a well known concept in endodontics. However it has created many controversies on whether monoblock would reinforce the roots and provide a superior coronal seal.In this review, attempts have been made to understand monoblock in a broader aspect and understand how the monoblock concept can be applied to the materials used till date which rehabilitates the root canal space. The potential of currently available bondable materials to achieve mechanically homogeneous units with root dentin is then discussed in relation to the classical concept in which the term monoblock was first employed in restorative dentistry and subsequently in endodontics.
ProTaper retreatment files and D-RaCe files are recommended over other instrument systems in terms of quality for managing retreatment root canal cases.
Background: The coronal seal is a crucial factor in success of endodontic therapy. Hence the aim of the present study was to assess the sealing ability by evaluating microleakage of three different types of interim restorative materials. Method: A total of 80 extracted human premolars were divided randomly in to 4 groups. Group A: Control group, Group B: Systemp Inlay, Group C: Temp IT Blue, Group D: Cavit-G. Standardized access cavity preparation was done followed by placement of cotton pellet in the access cavity, Interim restorative materials were placed as per the assigned group of restorative materials. Teeth were stained with 2% methylene blue solution for 1 week after which all the teeth were analysed for dye penetration under stereomicroscope. Statistical analysis of data was done using one-way ANOVA and Post Hoc Tukey test with a significance level of P ≤ 0.05. Results: Systemp Inlay showed the least micro leakage value followed by Temp.it blu and Cavit G. Intergroup comparison showed statistically significant difference between Systemp Inlay and other groups whereas Temp IT Blue and Cavit G showed no statistical significance.
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