Aim: The aim of this crossover study was to compare dislodging resistance in hemi-mandibulectomy patients who had been rehabilitated with prostheses made of conventional acrylic resin (CA), conventional acrylic resin lined with a soft liner (CAS), and three-dimensional (3D)—printed resin. Materials and methods: Patients were selected with hemi-mandibulectomy class III according to the Cantor and Curtis classification. Patients had a conventional acrylic denture for the upper arch with twin occlusion. For the lower arch, the patient received a conventional acrylic denture, after 3 months it was lined with a soft liner, and after 3 months, it was retrieved and they were given a 3D-printed denture for 3 more months. Resistance to dislodging force was measured using a force gauge at insertion and after 3 months. Results: The resistance to dislodging forces was highest in the printed denture, followed by lined acrylic followed by the conventional acrylic with mean values of (3.72 ± 0.057) Newton (N), (2.696 ± 0.151) N, and (1.91 ± 0.089) N, respectively.

Conclusion: Three-dimensional (3D)—printed denture bases showed the highest resistance to dislodging forces, followed by the CAS, and finally the CA. Clinical significance: Aiding patients with hemi-mandibulectomy with the best material to be used in their rehabilitation with dental prostheses