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Comparison of Denture Base Adaptation Between Additive and Conventional Fabrication Techniques


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.

To obtain adequate retention and stability in complete dentures, good adaptation between the impression surface of the prosthesis and the tissue surface must occur. Different factors in the production process can cause dimensional deformations.

For 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). The scanned intaglio surface of each denture base was superimposed on the scanned reference cast to compare the degree of tissue surface adaptation. The 3D surface deviations of the total intaglio surface, denture border apex, palatal vault, and crest of the ridge were also evaluated.

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. 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.

Tosun, ON, Bilmenoglu, C, Özdemir, AK. Comparison of denture base adaptation between additive and conventional fabrication techniques. J Prosthodont. 2022; 1– 7. https://doi.org/10.1111/jopr.13623


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