抄録
Long term clinical results with distal extension saddle cone-crown-retained-dentures (CCRD's) were discussed. Distal extension type of tooth loss may contribute to one of the etiologic factors of TMD's. The concept of shortened dental arch (SDA) advocated by Käyser et al was seem to be still controversial from the researches by the present author. Some of the clinical implications are stressed in this article when one treats the distal extension case using the cone-crown-telescope as direct retainers giving the design of RPD as the rigid supported concept. In conclusion, CCRD's are one of the standard methods in treating the distal extension cases with good and long term clinical results over 20 years.
