More information on luting compomer can be found below. The ferrule can also help preserve the hermetic seal of the luting cement. There are many dental luting agents available. It has been used as dental products as luting agent. A powder and liquid are mixed together to form the luting cement. This is the first of the GI luting cements to appear in 1978. Once the onlay/ inlay is seated, the viscosity of the adhesive resin luting cement decreases. Inlays and onlays are cemented in the mouth using adhesive resin luting cements. The presence of excess luting cement has been demonstrated to contribute to causing peri-implant mucositis. Research has determined that no single luting agent is ideal for all applications. Luting cements can have a low modulus or a high modulus. Luting materials are used to cement fixed prosthodontics such as crowns and bridges. Low modulus luting cements are more flexible and withstand more force without failing. However, compomer luting cement should not be used with all-ceramic crowns. Compomer luting cement can however be used for cast alloy and ceramic-metal restorations.