This is about a fixed denture structure.A overdenture, especially one placed on the teeth after root canal treatment.The overdenture is mainly composed of denture body and root column.Among them；The denture body,The upper end of the crown is the cap.The lower end is a support part.The denture body is provided with a non-circular through hole for the root column to penetrate.When the denture body is placed on the patient's teeth,Then the root column is put through the through hole on the denture body.When the denture body is adhered to the patient's teeth by adhesive,Because the through-hole on the denture body is not a circular hole,And the adhesive is filled in the gap between the through-hole of the denture body and the root column.After the adhesive has dried and hardened,The non-circular through-hole can prevent the rotation loosening between the denture body and the root column.本創作係有關一種固定式義齒結構，尤指一種裝設於做完根管治療後之牙齒上之蓋體式義齒，該蓋體式義齒主要係由義齒本體及牙根柱所組成，其中；該義齒本體，其上端為牙冠蓋體，下端為支撐部，義齒本體上開設有供牙根柱穿入之非圓形通孔，當義齒本體安置於患者之牙齒上，再將牙根柱穿過義齒本體上之通孔，並藉黏著劑令義齒本體黏著於患者之牙齒上時，因義齒本體上之通孔並非為圓形孔，且黏著劑充滿於義齒本體之通孔與牙根柱間之縫隙，於黏著劑乾固硬化後，非圓形之通孔可防止義齒本體與牙根柱間產生轉動鬆脫情事者。
