Effects of variable attachment shapes and aligner material on aligner retention.

Objective: To evaluate the retention of four types of aligners on a dental arch with various attachments.

Materials And Methods: For this study, three casts were manufactured, two of which contained attachments (ellipsoid and beveled), and one without any attachments to serve as a control. Four types of aligners were thermoformed: Clear-Aligner (CA)-soft, CA-medium, and CA-hard, with various thicknesses, and Essix ACE.

Cephalometric evaluation of the craniofacial complex in patients treated with an intraoral distraction osteogenesis device: a long-term study.

Introduction: Distraction osteogenesis has gained popularity because of the hypothesized concurrent soft-tissue expansion, which is believed to reduce postoperative relapse. Although many articles describe the immediate success of mandibular distraction, little research has been done on its long-term stability. Our goal was to examine the long-term craniofacial changes after distraction.

Damping effects on the response of maxillary incisor subjected to a traumatic impact force: a nonlinear finite element analysis.

Objectives: The aim of this study was to evaluate the effects of damping on stress concentration in an impacted incisor.

Methods: Damping ratios of maxillary incisors were tested using an in vivo modal testing method. A finite element model of the upper central incisor was established for dental trauma analysis.

Cephalometric evaluation of the craniofacial complex in patients treated with an intraoral distraction osteogenesis device: a preliminary report.

The purpose of this pilot study was to evaluate cephalometrically the efficacy of an intraoral distraction osteogenesis device in treating patients with unilateral mandibular hypoplasia. Six patients with hemifacial microsomia underwent unilateral mandibular distraction. Posteroanterior and 45 degrees lateral oblique cephalograms were measured, and changes in maxillary width and height, occlusal height, ramus height, mandibular length, and chin position were quantified.