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Manuel Bratos, Jumping M Bergin, Jeffrey E Rubenstein, John A Sorensen
STATEMENT OF PROBLEM: Conventional impression techniques to obtain a definitive cast for a complete-arch implant-supported prosthesis are technique-sensitive and time-consuming. Direct optical recording with a camera could offer an alternative to conventional impression making. PURPOSE: The purpose of this in vitro study was to test a novel intraoral image capture protocol to obtain 3-dimensional (3D) implant spatial measurement data under simulated oral conditions of vertical opening and lip retraction...
March 17, 2018: Journal of Prosthetic Dentistry
Maria Costanza Meazzini, Carlo Chiavenna, Luca Autelitano, Giovanna Garattini, Roberto Brusati
OBJECTIVE: Nasal stigma in patients with bilateral cleft lip and palate (BCLP) are a short columella and a flattened nasal tip. DESIGN: The aim of this study was to evaluate the aesthetics of adolescents with BCLP, operated with a modified Cutting primary columella lengthening technique, associated to a modified Grayson orthopedic nasoalveolar molding (NAM). SETTING AND PATIENTS: 72 BCLP patients were operated with this approach. Standardized photographic records were taken every 2 years...
April 2018: Cleft Palate-craniofacial Journal
Thomas Waltemate, Dominik Gall, Daniel Roth, Mario Botsch, Marc Erich Latoschik
This article reports the impact of the degree of personalization and individualization of users' avatars as well as the impact of the degree of immersion on typical psychophysical factors in embodied Virtual Environments. We investigated if and how virtual body ownership (including agency), presence, and emotional response are influenced depending on the specific look of users' avatars, which varied between (1) a generic hand-modeled version, (2) a generic scanned version, and (3) an individualized scanned version...
April 2018: IEEE Transactions on Visualization and Computer Graphics
Kihwan Han, Sangho Oh, Jaehoon Choi, Sang Woo Park
BACKGROUND: Alar transfixion sutures are commonly used for vestibular web correction. The purpose of this study was to evaluate the long-term results of the use of alar transfixion sutures in patients with a unilateral cleft lip nasal deformity using photogrammetric analysis. METHODS: The study included 42 patients who were divided into child and adult groups. A total of 4 measurement items were evaluated from a basal view by photogrammetry using standardized clinical photographic techniques preoperatively, immediately postoperatively, 3 months postoperatively, and 6 months postoperatively...
February 27, 2018: Annals of Plastic Surgery
Simon Sw Li, Daniel Hk Chow
BACKGROUND: Usual guidelines recommend symmetric load carriage over asymmetric load carriage. Whether this recommendation is valid for subjects with asymmetric body alignment, such as those with scoliosis, remains unclear. Scoliosis is both a subject-dependent and time-variant condition. Interventions are generally employed to prevent the abnormal spinal curvature from progressing. OBJECTIVES: To investigate the effects of an asymmetric load carriage on lateral spinal deformity in participant with scoliosis...
February 1, 2018: Prosthetics and Orthotics International
Shih-Wei Lin, Kate Sutherland, Yu-Fang Liao, Peter A Cistulli, Li-Pang Chuang, Yu-Ting Chou, Chih-Hao Chang, Chung-Shu Lee, Li-Fu Li, Ning-Hung Chen
BACKGROUND AND OBJECTIVE: Craniofacial structure is an important determinant of obstructive sleep apnoea (OSA) syndrome risk. Three-dimensional stereo-photogrammetry (3dMD) is a novel technique which allows quantification of the craniofacial profile. This study compares the facial images of OSA patients captured by 3dMD to three-dimensional computed tomography (3-D CT) and two-dimensional (2-D) digital photogrammetry. Measurements were correlated with indices of OSA severity. METHODS: Thirty-eight patients diagnosed with OSA were included, and digital photogrammetry, 3dMD and 3-D CT were performed...
February 20, 2018: Respirology: Official Journal of the Asian Pacific Society of Respirology
Fernando Zugno Kulczynski, Fernando de Oliveira Andriola, Pedro Henrique Deon, Denizar Alberto da Silva Melo, Rogério Miranda Pagnoncelli
PURPOSE: This study aimed to assess body posture before and after bimaxillary orthognathic surgery by photogrammetry in skeletal class III patients. METHODS: Thirty-one patients with skeletal class III dentofacial deformities (14 men, 17 women) who underwent orthodontic preparation for surgery were included in this non-randomized controlled trial. Of these, 15 who did not undergo orthognathic surgery during the period of this study served as controls. Postural assessment was performed by photogrammetry using SAPO® (Postural Assessment Software) based on anterior-, posterior-, and lateral-view images taken 1 month before and 4 months after bimaxillary orthognathic surgery with internal rigid fixation (or 4 months after the initial assessment, for the control group)...
February 13, 2018: Oral and Maxillofacial Surgery
Jenny E House, Viviana Brambilla, Luc M Bidaut, Alec P Christie, Oscar Pizarro, Joshua S Madin, Maria Dornelas
Coral reefs are a valuable and vulnerable marine ecosystem. The structure of coral reefs influences their health and ability to fulfill ecosystem functions and services. However, monitoring reef corals largely relies on 1D or 2D estimates of coral cover and abundance that overlook change in ecologically significant aspects of the reefs because they do not incorporate vertical or volumetric information. This study explores the relationship between 2D and 3D metrics of coral size. We show that surface area and volume scale consistently with planar area, albeit with morphotype specific conversion parameters...
2018: PeerJ
Priscila Maria Nascimento Martins de Albuquerque, Geisa Guimarães de Alencar, Daniela Araújo de Oliveira, Gisela Rocha de Siqueira
OBJECTIVE: The aim of this study was to examine and interpret the concordance, accuracy, and reliability of photogrammetric protocols available in the literature for evaluating cervical lordosis in an adult population aged 18 to 59 years. METHODS: A systematic search of 6 electronic databases (MEDLINE via PubMed, LILACS, CINAHL, Scopus, ScienceDirect, and Web of Science) located studies that assessed the reliability and/or concordance and/or accuracy of photogrammetric protocols for evaluating cervical lordosis, compared with radiography...
January 2018: Journal of Manipulative and Physiological Therapeutics
Jie Li, Yuting Huang, Yixin Zhang, Zheming Pu
Background: Rhinoplasty maneuvers to lengthen the nose include placing an alloplastic implant, caudally rotating the lower lateral cartilage (LLC), and stretching the soft tissue skin envelope (STSE) downward. Tissue tension associated with these procedures can result in implant extrusion or tip retraction. Objectives: The authors performed rhinoplasty with implantation of porous polyethylene (Medpor). The Medpor device enabled transfer of tension from the LLC and STSE to the juncture of the septal cartilage and upper lateral cartilage (ULC), thereby stabilizing the nasal structures...
January 18, 2018: Aesthetic Surgery Journal
Mirsha Quinto-Sánchez, Francesc Muñoz-Muñoz, Jorge Gomez-Valdes, Celia Cintas, Pablo Navarro, Caio Cesar Silva de Cerqueira, Carolina Paschetta, Soledad de Azevedo, Virginia Ramallo, Victor Acuña-Alonzo, Kaustubh Adhikari, Macarena Fuentes-Guajardo, Tábita Hünemeier, Paola Everardo, Francisco de Avila, Claudia Jaramillo, Williams Arias, Carla Gallo, Giovani Poletti, Gabriel Bedoya, Maria Cátira Bortolini, Samuel Canizales-Quinteros, Francisco Rothhammer, Javier Rosique, Andres Ruiz-Linares, Rolando Gonzalez-Jose
Facial asymmetries are usually measured and interpreted as proxies to developmental noise. However, analyses focused on its developmental and genetic architecture are scarce. To advance on this topic, studies based on a comprehensive and simultaneous analysis of modularity, morphological integration and facial asymmetries including both phenotypic and genomic information are needed. Here we explore several modularity hypotheses on a sample of Latin American mestizos, in order to test if modularity and integration patterns differ across several genomic ancestry backgrounds...
January 17, 2018: Scientific Reports
Karine J Sarro, Camila L Mombrini, Thais B Tonole
The knowledge about measurement errors of the measuring tool is important before its use, as clinical decisions are going to be made based on its results. Here we investigate intrarater and interrater reliability and the minimal detectable change (MDC) of thoracoabdominal mobility measurements using photogrammetry, considering novice and experienced raters. Thoracoabdominal mobility of 17 healthy participants was assessed; photographs during apnea in maximal inspiration and expiration were used to calculate latero-lateral and anteroposterior diameters of the thorax (at axillary and xiphoid level) and abdomen...
January 16, 2018: Physiotherapy Theory and Practice
Roxanne S Beltran, Brandi Ruscher-Hill, Amy L Kirkham, Jennifer M Burns
Body mass dynamics of animals can indicate critical associations between extrinsic factors and population vital rates. Photogrammetry can be used to estimate mass of individuals in species whose life histories make it logistically difficult to obtain direct body mass measurements. Such studies typically use equations to relate volume estimates from photogrammetry to mass; however, most fail to identify the sources of error between the estimated and actual mass. Our objective was to identify the sources of error that prevent photogrammetric mass estimation from directly predicting actual mass, and develop a methodology to correct this issue...
2018: PloS One
Kim Hébert-Losier, Fahmi Abd Rahman
The Posture Pro software is used for photogrammetry assessment of posture and has been commercially available for several years. Along with symmetry-related measures, a Posture Number® is calculated to reflect the sum of postural deviations. Our aim was to investigate the intra- and inter-rater reliability of measures extracted using the Posture Pro 8 software without using reference markers on subjects. Four raters assessed the standing posture of 40 badminton players (20 males, 20 females) from anterior, lateral, and posterior photographs...
December 27, 2017: Physiotherapy Theory and Practice
L Stolinski, M Kozinoga, D Czaprowski, M Tyrakowski, P Cerny, N Suzuki, T Kotwicki
Background: Digital photogrammetry provides measurements of body angles or distances which allow for quantitative posture assessment with or without the use of external markers. It is becoming an increasingly popular tool for the assessment of the musculoskeletal system. The aim of this paper is to present a structured method for the analysis of posture and its changes using a standardized digital photography technique. Material and methods: The purpose of the study was twofold...
2017: Scoliosis and Spinal Disorders
Ursula Buck, Kirsten Buße, Lorenzo Campana, Christian Schyma
Three-dimensional (3D) measurement techniques are gaining importance in many areas. The latest developments brought more cost-effective, user-friendly, and faster technologies onto the market. Which 3D techniques are suitable in the field of forensic medicine and what are their advantages and disadvantages? This wide-ranging study evaluated and validated various 3D measurement techniques for the forensic requirements. High-tech methods as well as low-budget systems have been tested and compared in terms of accuracy, ease of use, expenditure of time, mobility, cost, necessary knowhow, and their limitations...
December 19, 2017: International Journal of Legal Medicine
Maria Syngelaki, Matthias Hardner, Patrick Oberthuer, Thomas Bley, Danilo Schneider, Felix Lenk
A novel, non-destructive method for the biomass estimation of biological samples on culture dishes was developed. To achieve this, a photogrammetric system, which consists of a digital single-lens reflex camera (DSLR), an illuminated platform where the culture dishes are positioned and an Arduino board which controls the capturing process, was constructed. The camera was mounted on a holder which set the camera at different title angles and the platform rotated, to capture images from different directions. A software, based on stereo photogrammetry, was developed for the three-dimensional (3D) reconstruction of the samples...
March 2018: Bioprocess and Biosystems Engineering
Sarah Jane Day, Shaun Patrick Riley
BACKGROUND: The evolution of three-dimensional printing into prosthetics has opened conversations about the availability and cost of prostheses. This report will discuss how a prosthetic team incorporated additive manufacture techniques into the treatment of a patient with a partial hand amputation to create and test a unique assistive device which he could use to hold his French horn. Case description and methods: Using a process of shape capture, photogrammetry, computer-aided design and finite element analysis, a suitable assistive device was designed and tested...
February 2018: Prosthetics and Orthotics International
D T Connor, P G Martin, N T Smith, L Payne, C Hutton, O D Payton, Y Yamashiki, T B Scott
Airborne systems such as lightweight and highly portable unmanned aerial vehicles (UAVs) are becoming increasingly widespread in both academia and industry - with an ever-increasing range of applications, including (but not limited to), air quality sampling, wildlife monitoring and land-use mapping. In this work, high-resolution airborne photogrammetry obtained using a multi-rotor system operating at low survey altitudes, is combined with ground-based radiation mapping data acquired at an interim storage facility for wastes removed as part of the large-scale Fukushima clean-up program...
March 2018: Environmental Pollution
Matthias Kreutz, Brigitte Fitze, Christoph Blecher, Augello Marcello, Ruben Simon, Rebecca Cremer, Hans-Florian Zeilhofer, Christoph Kunz, Johannes Mayr
PURPOSE: The recommendation issued by the American Academy of Pediatrics in the early 1990s to position infants on their back during sleep to prevent sudden infant death syndrome (SIDS) has dramatically reduced the number of deaths due to SIDS but has also markedly increased the prevalence of positional skull deformation in infants. Deformation of the base of the skull occurs predominantly in very severe deformational plagiocephaly and is accompanied by facial asymmetry, as well as an altered ear position, called ear shift...
January 2018: Journal of Cranio-maxillo-facial Surgery
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