A mirror device for dental examination, comprising: a handle portion and a mirror portion with a reflective surface for the purpose of said reflective surface being effectively free of moisture and dirt during use in a dental procedure and for the purpose of easier cleaning and sterilization of both said handle portion and said mirror portion for re-use in between other dental procedures, wherein: said handle portion is hollow and contains an air duct comprising at one end an air inlet opening and on the other end an air outlet opening, wherein said reflective surface contains a hydrophobic or super-hydrophobic, and a non-sticking material, the device further comprising a detachable coupling adapted to be coupled to a compressed air supply in order to supply an air flow through said air duct of said handle portion, with the purpose to divert said air flow over said reflecting surface, during use in said dental procedure; the device being characterised by comprising: a protrusion that is inextricably attached to said mirror portion and shaped such, that said protrusion can be mounted detachably within said air outlet opening of said air duct of said handle portion by clamping, with the purpose to use said mirror device as a dental mirror in said dental procedure, wherein, in the detached state, said protrusion is from all sides accessible for cleaning and sterilization; further characterized in that, for the purpose of diverting a controlled and customized air flow over said reflecting surface, both said air duct in said handle portion and said protrusion on said mirror portion are adapted to each other such, that said air duct is further shaped and narrowed by the presence of said protrusion, and consequently the shape of said protrusion is adapted to influence the free passage of compressed air through said narrowed air duct, causing the aforementioned effect of controlling and customizing said air flow just before said air outlet opening. said handle portion is hollow and contains an air duct comprising at one end an air inlet opening and on the other end an air outlet opening, wherein said reflective surface contains a hydrophobic or super-hydrophobic, and a non-sticking material, the device further comprising a detachable coupling adapted to be coupled to a compressed air supply in order to supply an air flow through said air duct of said handle portion, with the purpose to divert said air flow over said reflecting surface, during use in said dental procedure; the device being characterised by comprising: a protrusion that is inextricably attached to said mirror portion and shaped such, that said protrusion can be mounted detachably within said air outlet opening of said air duct of said handle portion by clamping, with the purpose to use said mirror device as a dental mirror in said dental procedure, wherein, in the detached state, said protrusion is from all sides accessible for cleaning and sterilization; further characterized in that, for the purpose of diverting a controlled and customized air flow over said reflecting surface, both said air duct in said handle portion and said protrusion on said mirror portion are adapted to each other such, that said air duct is further shaped and narrowed by the presence of said protrusion, and consequently the shape of said protrusion is adapted to influence the free passage of compressed air through said narrowed air duct, causing the aforementioned effect of controlling and customizing said air flow just before said air outlet opening. a protrusion that is inextricably attached to said mirror portion and shaped such, that said protrusion can be mounted detachably within said air outlet opening of said air duct of said handle portion by clamping, with the purpose to use said mirror device as a dental mirror in said dental procedure, wherein, in the detached state, said protrusion is from all sides accessible for cleaning and sterilization; further characterized in that, for the purpose of diverting a controlled and customized air flow over said reflecting surface, both said air duct in said handle portion and said protrusion on said mirror portion are adapted to each other such, that said air duct is further shaped and narrowed by the presence of said protrusion, and consequently the shape of said protrusion is adapted to influence the free passage of compressed air through said narrowed air duct, causing the aforementioned effect of controlling and customizing said air flow just before said air outlet opening.