Comparison of Clinical and Radiographic Outcomes Between Single Symphyseal and Parasymphyseal Implants Versus Two Implant-Assisted Complete Mandibular Overdentures.

Purpose: This study aimed to compare the efficacy of single implants in the symphyseal and parasymphyseal regions with that of two implants in complete mandibular overdentures.

Patients And Methods: Fifteen completely edentulous male patients (50-65 years) were chosen and randomly grouped into three equal groups (five patients in each) according to the position and number of the received implants to assist mandibular complete overdentures: group I: single median implant; group II: single parasymphyseal implant; and group III: two implants were inserted in the canine area bilaterally. After three months of osseointegration, the lower denture was transformed into an implant-assisted complete mandibular overdenture.

Comparative Effect of Different Surface Treatments on the Shear Bond Strength of Two Types of Artificial Teeth Bonded To Two Types of Denture Base Resins.

Purpose: This in vitro study aims to assess the impact of various surface treatments on the shear bond strength (SBS) of two types of artificial teeth and denture base resins (DBRs).

Materials And Methods: Two types of DBRs (CAD/CAM-milled and heat-polymerized) and two types of denture teeth (acrylic and composite) were investigated. Teeth were cut into slices (5 × 5 × 2 mm) and divided according to surface treatment into four subgroups (n = 10): no treatment (control), air abrasion (Alumina-blasting; AB), bur roughening, and dichloromethane (DCM) subgroups.