Beijing Da Xue Xue Bao Yi Xue Ban 2020 Apr;52(2):368-372
Department of Prosthodontics, Center for Digital Dentistry, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.
Objective: To measure the dimensional data of complete dentures and to design a novel tray for recording maxillomandibular relationship of edentulous patients.
Methods: For the measurement, 100 pairs of complete dentures from the clinic were surveyed for the following parameters: a1, the distance between the middle fossa of the upper left and right first molars; a2, the anterior-posterior distance between the middle fossa of the upper first molars and the incisal edge; a3, the width of the upper denture; a4, the anterior-posterior length of the upper denture; a5, the height from the mesio-lingual cusp of the right upper first molar to the saddle surface; a5, the height from the central fossa of the right lower first molar to the saddle surface; a6, the height from the notch of the upper lip frenulum to the upper central incisor edge; a7, the least thickness of the labial saddle base in the upper central incisor region. Based on the data, the trays with different sizes were designed and fabricated, and the key parameters were: b1, the distance between the foramina of screw posts, b2, the anterior-posterior distance between the foramina of the screw posts and the incisal edge; b3, the width of the tray; b4, the anterior-posterior length of the tray; b5, the height of the posterior platform with the screw nut; b5, the height of the screw post; b6, the height of the anterior tray handle; b7, the thickness of the anterior tray handle. Read More