OBJECTIVE To compare the use of the 5-year-olds' index on both dental study casts and intraoral photographs when measuring primary surgical outcome for children born with unilateral cleft lip and palate (UCLP). DESIGN A cross-sectional study. SETTING Models and photographs collected from cleft units across the UK as part of the CCUK (Cleft Care UK) study were scored by two clinicians at the...

PURPOSE Precise implant-supported restorations require accurate impressions. Transfer, pick-up, and splinted pick-up are commonly used techniques. Several in vitro studies have compared these impression techniques; however, all studies used mechanical evaluation methods. The purpose of this study was to compare the discrepancies of these impression techniques digitally in vitro and in vivo. M...

OBJECTIVE To (1) evaluate the stability of palatal rugae as landmarks for superimposition of dental casts and (2) establish a three-dimensional superimposition method of maxillary dental casts for analyzing orthodontic tooth movement. MATERIALS AND METHODS The sample consisted of dental casts obtained from 10 patients treated with extraction of bilateral maxillary first premolars and placemen...

Purpose: The aim of this study was to present a new method analyze the three-dimensional accuracy complete-arch dental impressions and verify reliability method. Additionally, accuracies conventional intraoral digital were compared using Methods: A master model fabricated 14 milled polyetheretherketone cylinders maxillary acrylic model. Each cylinder positioned named according its corresponding...

OBJECTIVE To compare, in vitro, the accuracy between dental stone casts obtained from the first and the second pour using metallic (Smart) and plastic (Triple Tray) dual-arch trays. MATERIAL AND METHODS The impressions were taken using Flexitime® vinyl polysiloxane from a typodont model with a mandibular right first molar prepared for a full crown. Ten impressions were made with each tray and...

Purpose: The purpose of this in vitro study was to evaluate the effect plastic impression transfer copings on dimensional accuracy close tray implant impressions. Methods: A master model constructed using autopolymerizing acrylic resin. Five parallel holes were drilled for analogs. Custom trays made with polymethyl methacrylate consisted 2 groups (n=5): (group 1) Impression obtained coping 2) w...

Aims and objective: Precise reproduction of the intra-oral spatial relationship implants with an impression becomes first step in achieving accurate, passively fitting prosthesis. This vitro study aims to compare dimensional accuracy dental casts obtained from open tray splinted implant techniques using two different splinting materials.
 Methods Material: A mandibular acrylic model four a...

OBJECTIVE The purpose of this study was to compare dental size measurements, their reproducibility and the application of Tanaka and Johnston regression equation in predicting the size of canines and premolars on plaster and digital dental casts. METHODS Thirty plaster casts were scanned and digitized. Mesiodistal measurements of the teeth were then performed with a digital caliper on the pla...

OBJECTIVES To compare traditional plaster casts, digital models and 3D printed copies of dental plaster casts based on various criteria. To determine whether 3D printed copies obtained using open source system RepRap can replace traditional plaster casts in dental practice. To compare and contrast the qualities of two possible 3D printing options--source system RepRap and commercially available...