In addition, this technique can reduce clinical and laboratory time, as well as the necessity of storing gypsum casts. This digital intraoral and extraoral scanning technique offers a way to transfer the subgingival contours and intaglio surface of the interim restoration to the definitive restoration. However, once the interim restoration is removed to make an impression, the subgingival tissue, which is no longer physically supported, tends to collapse. In addition, this technique can reduce clinical and laboratory time, as well as the necessity of storing gypsum casts.ĪB - The accurate transfer of the subgingival contours of implant-supported restorations and pontics is essential for providing the dental technician with the necessary information to fabricate an optimal definitive fixed dental prosthesis. This is the printed PMMA used to transfer information such as esthetics the intaglio surface midline etc to us only. N2 - The accurate transfer of the subgingival contours of implant-supported restorations and pontics is essential for providing the dental technician with the necessary information to fabricate an optimal definitive fixed dental prosthesis. © 2019 Editorial Council for the Journal of Prosthetic Dentistry 2022 1– 7.T1 - Transferring subgingival contours around implants and the intaglio surface of the pontic to definitive digital casts by using an intraoral scanner Comparison of denture base adaptation between additive and conventional fabrication techniques. In the peripheral/posterior palatal seal area, denture bases printed at a 90 build angle showed significantly better adaption than other groups. Among the conventional techniques, more compatible dentures can be produced with IM while among the additive techniques, more compatible dentures can be produced with DLP technique. Overall, intaglio surface adaptation of denture bases printed from three angles had no significant difference in adaption. Inject the PVS material into the intaglio surface of the denture. The authors report that maxillary denture bases fabricated using DLP and IM techniques showed higher surface adaptation than the bases fabricated using LCD and CM techniques. space is critical to treatment planning of dental implants. The 3D surface deviations of the total intaglio surface, denture border apex, palatal vault, and crest of the ridge were also evaluated. The scanned intaglio surface of each denture base was superimposed on the scanned reference cast to compare the degree of tissue surface adaptation. Different factors in the production process can cause dimensional deformations.įor this study, a definitive maxillary cast was duplicated using a silicone mold to create 40 gypsum casts that were laser scanned before any fabrication procedures were initiated and then 10 gypsum models were created for each technique/group (DLP, LCD, CM, and IM). ![]() To obtain adequate retention and stability in complete dentures, good adaptation between the impression surface of the prosthesis and the tissue surface must occur. Now online in the Journal of Prosthodontics, an in vitro study comparing the adaptation of denture bases fabricated by injection molding (IM), compression molding (CM), liquid crystal display (LCD), and digital light processing (DLP) techniques.
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