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Full-Text Articles in Medicine and Health Sciences
Intra-Oral Scanning Devices Compared To Traditional Digital Impressions, Terpsithea Christou
Intra-Oral Scanning Devices Compared To Traditional Digital Impressions, Terpsithea Christou
All ETDs from UAB
The aim of this study is to review the state of art concerning 3D optical acquisition techniques and devices currently used in Orthodontics, and determine whether a commercial intra-oral scanner is as accurate as traditional impressions for orthodontic purposes. Materials and Methods: Records of 30 subjects were prospectively acquired and digital models were obtained using an intra-oral scanner, LythosTM by Ormco, and an extra-oral scanner, GOM ATOS Triple Scan II by GOM. Seven parameters indicating linear measurements from predetermined landmarks were measured and analyzed. Paired t tests, plots and bars and Bland and Altman Analysis were used to compare and …
Retention Of Cad/Cam Crowns Luted With Resin Cements And Rmgi, Shruti Sushilkumar Sonavane
Retention Of Cad/Cam Crowns Luted With Resin Cements And Rmgi, Shruti Sushilkumar Sonavane
All ETDs from UAB
Objectives: To measure retention of lithium disilicate (IPS e.max CAD, Ivoclar Viva-dent) and zirconia reinforced lithium disilicate (CELTRATM DUO, Dentsply) copings luted using resin cements and resin-modified glass ionomer cement. Methods: 110 Extracted human, non-carious mandibular 2nd premolars (n=10) were embedded in PVC cylinders with acrylic resin and placed into a lathe to produce a uni-form crown preparation (22°-convergence & 3mm-height). Following the orientation groove placement (69L bur), preparations were scanned and milled using a CEREC 3D/Sirona machine to produce e.max and CELTRATM DUO crowns. Preparations were imaged with a digital microscope (Keyence/VHX-600-20X) and the surface area of each crown …
In- Vitro Wear Of Four Cad-Cam Materials In The Uab Wear Simulating Device, Ritika Bansal
In- Vitro Wear Of Four Cad-Cam Materials In The Uab Wear Simulating Device, Ritika Bansal
All ETDs from UAB
In- vitro Wear of Four CAD- CAM Materials in the UAB Wear Simulating Device RITIKA BANSAL MS IN CLINICAL DENTISTRY ABSTRACT Hybrid ceramic/polymer blocks represent a new category of CAD/CAM materials that do not require heat treatment following milled fabrication and limited clinically relevant mechanical properties of these materials are available. Purpose: This study measures the hardness, flexural strength, modulus, and wear of 3 ceramic/polymer hybrid materials (LAVA Ultimate, Enamic, and Cerasmart), 2 reference glass ceramics (IPS e.max and Celtra Duo), and 1 reference composite material (Paradigm MZ100). Methods: Flexural strength specimens (n=10) (2.5 Ã 2.5 Ã 16 mm) were …
Preparation Of Zirconia For Bonding Following Salivary Contamination, Pattarika Angkasith
Preparation Of Zirconia For Bonding Following Salivary Contamination, Pattarika Angkasith
All ETDs from UAB
Purpose: To determine the best method of cleaning saliva-contaminated zirconia in order to regain its bond strength. Methods: Flat blocks of zirconia were particle-abraded with aluminum oxide and divided into eight groups (n=10). Groups 1-5 were first treated with 1 coat of an MDP-primer (Z-Prime Plus, Bisco) and groups 5-8 were left untreated. All specimens were contaminated with human saliva for 3 minutes other than the control (group 1). The specimens were then cleaned by rinsing with water for 20 sec (groups 2 and 5), cleaning with 35% phosphoric acid for 20 sec and rinsing (group 3 and 6), cleaning …
Anteroposterior (Ap) Relationship Of The Maxillary Central Incisors To The Forehead In Adult African American Females, Matthew Philip Gidaly
Anteroposterior (Ap) Relationship Of The Maxillary Central Incisors To The Forehead In Adult African American Females, Matthew Philip Gidaly
All ETDs from UAB
Objective: Determine the optimal anteroposterior (AP) relationship of the maxillary central incisors to the forehead in adult African American females (AAF). Materials and Methods: Smile profile photographs of 48 AAF with optimal AP incisor positions (control); 49 seeking/wanting orthodontic treatment (Group 1), and 53 not seeking/wanting treatment (Group 2) were acquired. All images were scaled to life-size and printed. The AP position of the maxillary central incisors and forehead inclination were measured relative to reference lines. Results: The mean AP position of the maxillary central incisors relative to Glabella Vertical (GV) for the controls was 8.58 ± 3.96 mm ahead …