1, The free end of the tooth is missing. 2.To be used as temporary restorations while waiting for the wound to heal shortly after extraction. 3.Patients who cannot tolerate the grinding of dental tissues during fixed denture restoration. 4, Children with missing teeth during the growth period. 5, Missing teeth with alveolar bone defect (trauma surgery). 6, Cleft palate patients with missing teeth, can also be used to close the fissure.