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  1 / 2067 MEDLINE  
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Fotocopia
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PMID:28749703
Autor:Di Carlo G; Fernandez Gurani S; Pinholt EM; Cattaneo PM
Dirección:1 Department of Oral and Maxillofacial Science, Sapienza University of Rome, Rome, Italy.
Título:A new simple three-dimensional method to characterize upper airway in orthognathic surgery patient.
Fuente:Dentomaxillofac Radiol; 46(8):20170042, 2017 Dec.
ISSN:0250-832X
País de publicación:England
Idioma:eng
Resumen:OBJECTIVES: To develop and validate a new reproducible 3D upper airway analysis based on skeletal structures not involved in the modification, which occur during orthognathic surgery. METHODS: From retrospective cohort of orthognathic surgically treated patients, pre- and postsurgical CBCT-scans of 10 post-pubertal patients were randomly selected. Two operators identified the landmarks, calculated the airway volumes, cross sections and linear measurements on the 10 scans twice at two different time intervals. Statistical analysis included test for normal distribution, technical error measurements, and intra- and inter-observers reliability. RESULTS: Intra- and inter-observer reliability was excellent for volumes and cross sections. The entire data sets exhibited normal distribution. Technical error of measurements showed an error in the range of 1.6 to 10.2% for volume, 1.6 to 12.2% for cross-sectional measurements, and 0.3 to 2.5% for linear measurements. No systematic errors were detected. CONCLUSIONS: This new proposed definition of upper airway boundaries was shown to be technical feasible and tested to be reliable in measuring upper airway in patients undergoing orthognathic surgery.
Tipo de publicación:JOURNAL ARTICLE


  2 / 2067 MEDLINE  
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Fotocopia
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PMID:28459132
Autor:Bauer FX; Güll FD; Roth M; Ritschl LM; Rau A; Gau D; Gruber M; Eblenkamp M; Hilmer B; Wolff KD; Loeffelbein DJ
Dirección:Institute of Medical and Polymer Engineering, Technische Universität München, Munich, Germany.
Título:A prospective longitudinal study of postnatal dentoalveolar and palatal growth: The anatomical basis for CAD/CAM-assisted production of cleft-lip-palate feeding plates.
Fuente:Clin Anat; 30(7):846-854, 2017 Oct.
ISSN:1098-2353
País de publicación:United States
Idioma:eng
Resumen:This study describes the dentoalveolar and palatal growth during the first months of life. Knowledge concerning this development is essential to avoid unwanted events such as mucosal ulcerations or restriction of growth when cleft-lip and palate (CLP) patients are treated. The results involve the generation of CAD/CAM CLP-feeding plates. Intraoral impressions from 32 healthy newborns were taken monthly for 5 months, supplemented by measurements of body weight, length, and occipital-frontal head circumference. The casts were digitalized, and two observers manually selected defined anatomical landmarks on virtual 3-D models. The distances between these landmarks were evaluted. Statistical analysis included an inter-rater agreement analysis and the determination of growth. In total, 213 casts were analyzed, with 65 models excluded because of inaccuracies in impression-taking or cast production. Overall longitudinal growth was 20.3%, whereas transversal growth reached a maximum of 21.1%. Vertical growth was 32.4% at the tuberal level. On the basis of these results, a semiautomated series of feeding plates allowing for monthly expansion could be generated. The acquired data serve as a useful reference for other pediatric and orthofacial investigations and treatments. One such application is the automated, fully virtual manufacture of CLP-feeding plates based on only one impression-taking. Our data reveal when caution is needed to prevent ulceration. The series of plates generated can minimize the time-consuming impression-taking and the production of further plaster models. The method of measurement is suitable for documentary purposes. Clin. Anat. 30:846-854, 2017. © 2017 Wiley Periodicals, Inc.
Tipo de publicación:JOURNAL ARTICLE


  3 / 2067 MEDLINE  
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PMID:28459126
Autor:Hu S; Zhuo L; Zhang X; Yang S
Dirección:Department of Anatomy, Zunyi Medical College, Zunyi, Guizhou, China.
Título:Localization of nerve entry points as targets to block spasticity of the deep posterior compartment muscles of the leg.
Fuente:Clin Anat; 30(7):855-860, 2017 Oct.
ISSN:1098-2353
País de publicación:United States
Idioma:eng
Resumen:To identify the optimal body surface puncture locations and the depths of nerve entry points (NEPs) in the deep posterior compartment muscles of the leg, 60 lower limbs of thirty adult cadavers were dissected in prone position. A curved line on the skin surface joining the lateral to the medial epicondyles of the femur was taken as a horizontal reference line (H). Another curved line joining the lateral epicondyle of the femur to the lateral malleolus was designated the longitudinal reference line (L). Following dissection, the NEPs were labeled with barium sulfate and then subjected to spiral computed tomography scanning. The projection point of the NEP on the posterior skin surface of the leg was designated P, and the projection in the opposite direction across the transverse plane was designated P'. The intersections of P on H and L were identified as P and P , and their positions and the depth of the NEP on PP' were measured using the Syngo system and expressed as percentages of H, L, and PP'. The P points of the tibial posterior, flexor hallucis longus and flexor digitorum longus muscles were located at 38.10, 46.20, and 55.21% of H, respectively. The P points were located at 25.35, 41.30, and 45.39% of L, respectively. The depths of the NEPs were 49.11, 54.64, and 55.95% of PP', respectively. The accurate location of these NEPs should improve the efficacy and efficiency of chemical neurolysis for treating spasticity of the deep posterior compartment muscles of the leg. Clin. Anat. 30:855-860, 2017. © 2017 Wiley Periodicals, Inc.
Tipo de publicación:JOURNAL ARTICLE


  4 / 2067 MEDLINE  
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PMID:29201300
Autor:Heo JY; Lee JW; Kim CH; Lee SM; Choi YS
Dirección:Department of Orthopedic Surgery, Kwangju Christian Hospital, Gwangju, Korea.
Título:The Validation of Ultrasound-Guided Target Segment Identification in Thoracic Spine as Confirmed by Fluoroscopy.
Fuente:Clin Orthop Surg; 9(4):472-479, 2017 Dec.
ISSN:2005-4408
País de publicación:Korea (South)
Idioma:eng
Resumen:Background: The role of ultrasound in the thoracic spine has been underappreciated, partly because of the relative efficacy of the landmark-guided technique and the limitation of imaging through the narrow acoustic windows produced by the bony framework of thoracic spine. The aim of this study was to make a comparison between the 12th rib and the spinous process of C7 as a landmark for effective ultrasound-guided target segment identification in the thoracic spine. Methods: Ultrasonography of 44 thoracic spines was performed and the same procedure was carried out 1 week later again. The target segments (T3-4, T7-8, and T10-11) were identified using the 12th rib (group 1) or the spinous process of C7 (group 2) as a starting landmark. Ultrasound scanning was done proximally (group 1) or distally (group 2) toward the target transverse process and further medially and slightly superior to the target thoracic facet. Then, a metal marker was placed on the T3-4, T7-8, and T10-11 and the location of each marker was confirmed by fluoroscopy. Results: In the total 132 segments, sonographic identification was confirmed to be successful with fluoroscopy in 84.1% in group 1 and 56.8% in group 2. Group 1 had a greater success rate in ultrasound-guided target segment identification than group 2 ( = 0.001), especially in T10-11 (group 1, 93.2%; group 2, 43.2%; = 0.001) and T7-8 (group 1, 86.4%; group 2, 56.8%; = 0.002). The intrarater reliability of ultrasound-guided target segment identification was good (group 1, = 0.76; group 2, = 0.82), showing no difference between right and left sides. Ultrasound-guided target segment identification was more effective in the non-obese subjects ( = 0.001), especially in group 1. Conclusions: Ultrasound-guided detection using the 12th rib as a starting landmark for scanning could be a promising technique for successful target segment identification in the thoracic spine.
Tipo de publicación:COMPARATIVE STUDY; JOURNAL ARTICLE; VALIDATION STUDIES


  5 / 2067 MEDLINE  
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PMID:29201298
Autor:Thippana RK; Kumar MN
Dirección:Department of Orthopaedics and Trauma, Hosmat Hospital, Bangalore, India.
Título:Lateralization of Tibial Plateau Reference Point Improves Accuracy of Tibial Resection in Total Knee Arthroplasty in Patients with Proximal Tibia Vara.
Fuente:Clin Orthop Surg; 9(4):458-464, 2017 Dec.
ISSN:2005-4408
País de publicación:Korea (South)
Idioma:eng
Resumen:Background: The tibial cut referenced to the center of the intercondylar eminence often leads to varus malalignment in the presence of preexisting proximal tibia vara. The purpose of this study was to investigate the effect of lateralization of the lateral tibial plateau reference point (based on the amount of proximal tibia vara) on the postoperative coronal plane alignment. Methods: In this prospective cohort study, 62 patients (95 knees) with osteoarthritis and proximal tibia vara underwent primary total knee arthroplasty using a lateral tibial plateau reference point for the extramedullary jig. The pre- and postoperative radiographs were obtained for measurement of mechanical axis deviation, degree of tibia vara, proximal lateral reference point of the tibial condyle, and coronal alignment of the femoral and tibial components. The distance between the tibial reference point and the center of the intercondylar eminence was measured intraoperatively. Results: The mean tibia vara was 7.1° (standard deviation [SD], 2.3°). The mean lateral displacement of the reference point was 7 mm (SD, 2.2 mm). Postoperative tibiofemoral angle was 6° to 10° of valgus in 94% of cases. There was a strong correlation between the magnitude of tibia vara and the amount of lateralization of the tibial reference point ( = 0.79, < 0.001). Conclusions: In total knee arthroplasty patients with proximal tibia vara, reasonable accuracy can be achieved with use of the extramedullary jig for tibial component alignment by lateralizing the proximal tibial reference point.
Tipo de publicación:JOURNAL ARTICLE


  6 / 2067 MEDLINE  
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PMID:28455631
Autor:Suntharos P; Setser RM; Bradley-Skelton S; Prieto LR
Dirección:Department of Pediatric Cardiology, Cleveland Clinic Children's, 9500 Euclid Avenue, Desk M-41, Cleveland, OH, 44195, USA. sunthap@ccf.org.
Título:Real-time three dimensional CT and MRI to guide interventions for congenital heart disease and acquired pulmonary vein stenosis.
Fuente:Int J Cardiovasc Imaging; 33(10):1619-1626, 2017 Oct.
ISSN:1875-8312
País de publicación:United States
Idioma:eng
Resumen:To validate the feasibility and spatial accuracy of pre-procedural 3D images to 3D rotational fluoroscopy registration to guide interventional procedures in patients with congenital heart disease and acquired pulmonary vein stenosis. Cardiac interventions in patients with congenital and structural heart disease require complex catheter manipulation. Current technology allows registration of the anatomy obtained from 3D CT and/or MRI to be overlaid onto fluoroscopy. Thirty patients scheduled for interventional procedures from 12/2012 to 8/2015 were prospectively recruited. A C-arm CT using a biplane C-arm system (Artis zee, VC14H, Siemens Healthcare) was acquired to enable 3D3D registration with pre-procedural images. Following successful image fusion, the anatomic landmarks marked in pre-procedural images were overlaid on live fluoroscopy. The accuracy of image registration was determined by measuring the distance between overlay markers and a reference point in the image. The clinical utility of the registration was evaluated as either "High", "Medium" or "None". Seventeen patients with congenital heart disease and 13 with acquired pulmonary vein stenosis were enrolled. Accuracy and benefit of registration were not evaluated in two patients due to suboptimal images. The distance between the marker and the actual anatomical location was 0-2 mm in 18 (64%), 2-4 mm in 3 (11%) and >4 mm in 7 (25%) patients. 3D3D registration was highly beneficial in 18 (64%), intermediate in 3 (11%), and not beneficial in 7 (25%) patients. 3D3D registration can facilitate complex congenital and structural interventions. It may reduce procedure time, radiation and contrast dose.
Tipo de publicación:JOURNAL ARTICLE; VALIDATION STUDIES


  7 / 2067 MEDLINE  
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Fotocopia
Texto completo SciELO Brasil
PMID:29185606
Autor:Lim EL; Ngeow WC; Lim D
Dirección:University of Malaya, Faculty of Dentistry, Department of Oral and Maxillofacial Clinical Sciences, Kuala Lumpur, Malaysia.
Título:The implications of different lateral wall thicknesses on surgical access to the maxillary sinus.
Fuente:Braz Oral Res; 31:e97, 2017 Nov 27.
ISSN:1807-3107
País de publicación:Brazil
Idioma:eng
Resumen:The objective of this study was to measure the topographic thickness of the lateral wall of the maxillary sinus in selected Asian populations. Measurements were made on the lateral walls of maxillary sinuses recorded using CBCT in a convenient sample of patients attending an Asian teaching hospital. The points of measurement were the intersections between the axes along the apices of the canine, first premolar, and second premolar and along the mesiobuccal and distobuccal apices of the first and second molars and horizontal planes 10 mm, 20 mm, 30 mm and 40 mm beneath the orbital floor. The CBCT images of 109 patients were reviewed. The mean age of the patients was 33.0 (SD 14.8) years. Almost three quarters (71.8%) of the patients were male. The mean bone thickness decreased beginning at the 10-mm level and continuing to 40 mm below the orbital floor. Few canine regions showed encroachment of the maxillary sinus. The thickness of the buccal wall gradually increased from the canine region (where sinus encroachment of the canine region was present) to the first molar region, after which it decreased to the thickness observed at the canine region. The buccal wall of the maxillary sinus became thicker anteroposteriorly, except in the region of the second molar, and thinner superoinferiorly. These changes will affect the approach used to osteotomize the lateral sinus wall for oral surgery and for the sinus lift procedure.
Tipo de publicación:JOURNAL ARTICLE


  8 / 2067 MEDLINE  
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PMID:29173858
Autor:An S; Lee JY; Chung CJ; Kim KH
Dirección:Department of Orthodontics, School of Dentistry, Yonsei University, Seoul, Korea.
Título:Comparison of different midsagittal plane configurations for evaluating craniofacial asymmetry by expert preference.
Fuente:Am J Orthod Dentofacial Orthop; 152(6):788-797, 2017 Dec.
ISSN:1097-6752
País de publicación:United States
Idioma:eng
Resumen:INTRODUCTION: In this study, we aimed to compare 8 candidate midsagittal planes (MSPs) constructed from different median landmarks to determine the most appropriate one for evaluating craniofacial asymmetry. METHODS: We included 30 patients (18 men, 12 women; mean age, 25.7 ± 6.03 years) who visited the National Health Insurance Service Ilsan Hospital in Gyeonggi-do, Korea, with a complaint of facial asymmetry. Four MSPs passing through 2 median landmarks perpendicular to the Frankfort horizontal plane and 4 other MSPs passing through 3 median landmarks were constructed. Menton, anterior nasal spine, and anterior nasal spine-to-posterior nasal spine line deviations were evaluated using these 8 MSPs. Eight MSPs from 30 subjects were shown to 6 experts, who selected the planes that they considered the most appropriate. RESULTS: Experts most frequently selected the plane passing through nasion and basion perpendicular to the Frankfort horizontal plane (66 of 180 times; P <0.05). In evaluating craniofacial asymmetry, using MSPs passing through 3 median landmarks in the cranial base can lead to underestimation of the asymmetry of the menton, anterior nasal spine, and anterior nasal spine-to-posterior nasal spine line. CONCLUSIONS: We suggest using MSPs perpendicular to the Frankfort horizontal plane or a plane passing through anterior nasal spine in clinical practice.
Tipo de publicación:COMPARATIVE STUDY; JOURNAL ARTICLE


  9 / 2067 MEDLINE  
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PMID:28973368
Autor:Sjöstrand J; Rosén R; Nilsson M; Popovic Z
Dirección:Department of Ophthalmology, University of Gothenburg, Gothenburg, Sweden.
Título:Arrested Foveal Development in Preterm Eyes: Thickening of the Outer Nuclear Layer and Structural Redistribution Within the Fovea.
Fuente:Invest Ophthalmol Vis Sci; 58(12):4948-4958, 2017 Oct 01.
ISSN:1552-5783
País de publicación:United States
Idioma:eng
Resumen:Purpose: The aim of this study was to define landmarks to better characterize foveal microstructure in normal subjects and in preterms with or without signs of immaturity, and to report on thickness changes of outer foveal layers following analysis of optical coherence tomography (OCT) B-scan images. Methods: Selected eyes from eight young adults with a history of prematurity (24-33 weeks of gestation) and five controls were imaged using conventional and directional OCT. Retinal layer thickness analysis was performed at selected temporal eccentricities defined by the individual distance between two landmarks for each case, the foveal center and the foveal rim. Results: The use of a foveal center and foveal rim landmark transformation enabled comparisons of interindividual B-scans at corresponding landmark positions in both controls and preterms. We found a 20% shorter foveal center to foveal rim distance in preterms with an immature fovea than in controls. Reflectometric and manual segmentation measurements showed increased thickness of inner retinal layers and photoreceptor cell body and outer plexiform layers centrally, but no observable change of photoreceptor inner and outer segment thickness. Conclusions: Our landmark-based analysis of OCT images using reflectometry and manual segmentation provides complementary findings in comparisons of normal and immature foveal structures. We show a central thickness increase in the outer nuclear layer, outer plexiform layer, and postreceptor layers in preterms with signs of arrested foveal development. We found no indication of abnormal photoreceptor inner or outer segment development in preterms.
Tipo de publicación:JOURNAL ARTICLE


  10 / 2067 MEDLINE  
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Fotocopia
Texto completo SciELO Brasil
PMID:28877282
Autor:Won SY; Kim HK; Kim ME; Kim KS
Dirección:Department of Oral Medicine, Dankook University College of Dentistry, Cheonan, South Korea.
Título:Two-point discrimination values vary depending on test site, sex and test modality in the orofacial region: a preliminary study.
Fuente:J Appl Oral Sci; 25(4):427-435, 2017 Jul-Aug.
ISSN:1678-7765
País de publicación:Brazil
Idioma:eng
Resumen:Objective: The aims of the present study were to determine the normal values of TPD in the six trigeminal sites (the forehead, cheek, mentum, upper lip, lower lip, and the tongue tip) and to investigate the effect of the site, sex, and test modality on the TPD perception. Material and Methods: Forty healthy volunteers consisting of age-matched men (20) and women (20) with a mean age of 27.1 years were recruited. One examiner performed the TPD test using a simple hand-operated device, i.e., by drawing compass with a blunt or sharp-pointed tip. The static TPD with a blunt-pointed tip (STPDB), moving TPD with a blunt-pointed tip (MTPDB), and static TPD with a sharp-pointed tip (STPDS) were measured. The predictors were the site, sex, and test modality, and the outcome variable was the TPD value. Three-way ANOVA was used for statistics. Results: The analysis showed a significant effect of the site, sex and test modality on the TPD values. Significant differences between the test sites were observed with the descending order from the forehead and cheek>mentum>upper lip and lower lip>tongue tip and index finger. Women showed lower TPD values than those of men. The STPDS measurements were consistently lower than those of the STPDB and MTPDB. Conclusions: The normal values of TPD in this study suggest that the cheek and forehead were less sensitive than other regions evaluated and women were more sensitive than men. The STPDS was the most sensitive test modality.
Tipo de publicación:JOURNAL ARTICLE



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