When there are teeth missing in the mouth cavity this seriously disturbes the proper bit and chewing harmony. In cases when there are few or inappropriately located teeth to support the bridge construction of the dentures, most commonly removable partial protheses are applyed, but they are widely found as inconvenient. Implants could be used instead, but this requires surgery, and is often too stressing to the patient. The modern solution of the problem is the Attractive Glass Abutment System ZX-27 – an invention, that was given a patent back in 1991.