Review Article International Journal of Dental Materials 2019; 1(2) An overview of dentin bonding agents Kadali Navyasri 1,* , Rama Krishna Alla 2 , Guduri Vineeth 3 , Suresh Sajjan MC 4 1 Lecturer, Department of Dental Materials, Vishnu Dental College, Bhimavaram, West Godavari, 534202, Andhra Pradesh, India. 2 Assistant Professor, Department of Dental Materials, Vishnu Dental College, Bimavaram, West Godavari, 534202, Andhra Pradesh, India. 3 Assistant Professor, Department of Prosthodontics, Vishnu Dental College, Bimavaram, West Godavari, 534202, Andhra Pradesh, India. 4 Professor, Department of Prosthodontics, Vishnu Dental College, Bhimavaram, West Godavari, 534202, Andhra Pradesh, India. INFORMATION Article History Received 14 October 2019 Received revised 02 November 2019 Accepted 03 November 2019 Available online 15 November 2019 KEYWORDS Bonding agents Adhesives Primers, Conditioning agents Self-etch adhesives Total-etch. ABSTRACT From the past, there has been a lot of use of the bonding agents in restora- tive dentistry. Choosing of bonding systems has become a challenge for the clinicians as there was a lot of advances regarding the usage of bonding agents. Each successive modification in the formulae has led to the classifi- cation of the bonding system into many “generations”. During the past few years, these bonding agents have been replaced by the same systems that are used on dentin. This change occurred because of the benefit of bonding resin to both enamel and dentin. Extensive research is still on the way to develop the best adhesive system that can produce reliable and permanent bonds to dentin. Correspondence: *Corresponding author Email Address: navyasri.bandi@vdc.edu.in How to cite this article: Navyasri K, Alla RK, Vineeth G, Suresh Sajjan MC. An overview of dentin bonding agents. Int J Dent Mater 2019;1(2): 60-67. DOI: http://dx.doi.org/10.37983/IJDM.2019.1204 1. Introduction In dentistry, composites are widely used esthetic restorative materials over six decades [1]. The essential components of dental composites include res- in matrix, organic/inorganic fillers, and coupling agents. The composition of dental composites is given in Table 1 [2]. The advantages of dental compo- site materials include improved strength, abrasion resistance, translucency, ease of application, and polishability. These qualities made them rapidly increased their use in the first decade after being introduced and continues to increase their popularity [3,4]. However, the major disadvantage with the composites is their poor bonding mechanism to the natural tooth. Numerous researchers developed various adhesive resins to provide an appropriate bonding between the composite resin and natural tooth. These early adhe- sive systems necessitate etching of the natural tooth with certain acids fol- lowed by treating with primers and/or conditioning agents [2]. Bonding agents can bring a strong bond between the composite and the tooth structure to withstand mechanical forces and stress. The success of adhesives depends on their ability to adhere to the natural tooth on one side and the composite restoration on the other side. The bonding can be achieved