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https://www.readbyqxmd.com/read/29655707/temporomandibular-condylar-morphology-in-diverse-maxillary-mandibular-skeletal-patterns-a-3-dimensional-cone-beam-computed-tomography-study
#1
Qiaoling Ma, Panthi Bimal, Li Mei, Simon Olliver, Mauro Farella, Huang Li
BACKGROUND: The authors evaluated the morphology and symmetry of the temporomandibular joint in participants with normodivergent and hyperdivergent skeletal class I, II, and III patterns. METHODS: A total of 80 participants were divided into 4 groups on the basis of their sagittal and vertical skeletal patterns. Cone-beam computed tomographic images were used to evaluate the condyle-fossa relationship and the morphology and symmetry of the mandibular condyle. One-way analysis of variance and Tukey post hoc tests were used to compare the mean values among the different groups...
April 11, 2018: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29655582/comparison-of-3-image-guided-adaptive-strategies-for-bladder-locoregional-radiotherapy
#2
Vickie C Kong, Amy Taylor, Peter Chung, Tim Craig, Tara Rosewall
The objective of this study was to compare the dosimetric differences of a population-based planning target volume (PTV) approach and 3 proposed adaptive strategies: plan of the day (POD), patient-specific PTV (PS-PTV), and daily reoptimization (ReOpt). Bladder patients (n = 10) were planned and treated to 46 Gy in 23 fractions with a full bladder in supine position by the standard strategy using a population-based PTV. For each patient, the adaptive strategy was executed retrospectively as follows: (1) POD-multiple distributions of various PTV sizes were generated, and the appropriate distribution based on the bladder of the day was selected for each fraction; (2) PS-PTV-population-based PTV was used for the first 5 fractions and a new PTV derived using information from these fractions was used to deliver the remaining 18 fractions; and (3) ReOpt-distribution was reoptimized for each fraction based on the bladder of the day...
April 11, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29655527/the-smiling-scan-technique-facially-driven-guided-surgery-and-prosthetics
#3
Alessandro Pozzi, Lorenzo Arcuri, Peter K Moy
PURPOSE: To introduce a proof of concept technique and new integrated workflow to optimize the functional and esthetic outcome of the implant-supported restorations by means of a 3-dimensional (3D) facially-driven, digital assisted treatment plan. METHODS: The Smiling Scan technique permits the creation of a virtual dental patient (VDP) showing a broad smile under static conditions. The patient is exposed to a cone beam computed tomography scan (CBCT), displaying a broad smile for the duration of the examination...
April 11, 2018: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29652674/analysis-of-intercanine-distance-and-dimensional-changes-in-bite-marks-on-foodstuffs-using-cone-beam-computed-tomography
#4
Ibrahim K Ali, Kaustubh Sansare, Freny R Karjodkar
Bite marks on foodstuff at the crime scene provide a 3-dimensional imprint of the suspect's dentition. The bite mark analysis can provide useful evidences, leading to the inclusion or exclusion of the individual under investigation. This study was designed to assess bite marks on various common foodstuffs (chocolate, apple, chewing gum, cheese) for different time intervals using cone beam computed tomography (CBCT) to evaluate the dimensional changes in the foodstuffs. Analysis of variance test was used to compare the bite marks measured using CBCT in maxillary and mandibular arches with significance set at P < 0...
April 12, 2018: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/29651825/feasibility-of-using-optical-coherence-tomography-to-detect-acute-radiation-induced-esophageal-damage-in-small-animal-models
#5
Pouya Jelvehgaran, Daniel Martijn de Bruin, F Javier Salguero, Gerben Roelof Borst, Ji-Ying Song, Ton G van Leeuwen, Johannes F de Boer, Tanja Alderliesten, Marcel van Herk
Lung cancer survival is poor, and radiation therapy patients often suffer serious treatment side effects. The esophagus is particularly sensitive leading to acute radiation-induced esophageal damage (ARIED). We investigated the feasibility of optical coherence tomography (OCT) for minimally invasive imaging of the esophagus with high resolution (10  μm) to detect ARIED in mice. Thirty mice underwent cone-beam computed tomography imaging for initial setup assessment and dose planning followed by a single-dose delivery of 4...
April 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29651823/weak-light-emission-of-soft-tissues-induced-by-heating
#6
Antonello E Spinelli, Giovanni Durando, Federico Boschi
The main goal of this work is to show that soft tissue interaction with high-intensity focused ultrasound (HIFU) or direct heating leads to a weak light emission detectable using a small animal optical imaging system. Our results show that the luminescence signal is detectable after 30 min of heating, resembling the time scale of delayed luminescence. The imaging of a soft tissue after heating it using an HIFU field shows that the luminescence pattern closely matches the shape of the cone typical of the HIFU beam...
April 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29651519/root-resorption-due-to-orthodontic-treatment-using-self-ligating-and-conventional-brackets-a-cone-beam-computed-tomography-study
#7
Isil Aras, Idil Unal, Gencer Huniler, Aynur Aras
OBJECTIVES: Purpose of the present study was to compare external root resorption (ERR) volumetrically in maxillary incisors induced by orthodontic treatment using self-ligating brackets (Damon Q, DQ) or conventional brackets (Titanium Orthos, TO) with the help of cone-beam computed tomography (CBCT). PATIENTS AND METHODS: A sample of 32 subjects, with Angle Class I malocclusion and anterior crowding of 4-10 mm, was divided randomly into two groups: a DQ group, in which self-ligating DQ brackets with Damon archwires were used; and a TO group, in which conventional TO brackets with large Orthos archwires were applied...
April 12, 2018: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/29649372/autogenous-bone-graft-versus-bovine-bone-graft-in-association-with-platelet-rich-plasma-for-the-reconstruction-of-alveolar-clefts-a-pilot-study
#8
Bruno Torres Bezerra, John Nadson Andrade Pinho, Fabrício Eneas Diniz Figueiredo, José Renato Moraes Carvalho Barreto Brandão, Lucas Celestino Guerzet Ayres, Luiz Carlos Ferreira da Silva
OBJECTIVE: To compare the outcomes of 2 different bone graft materials: autogenous bone grafts from mandibular symphysis and bovine bone grafts associated with platelet-rich plasma (PRP). METHODS: Twenty individuals met the inclusion criteria and accepted to participate in the study. Group A patients underwent alveolar bone grafting using autologous bone and group B patients using a bovine bone graft associated with PRP. Cone beam computed tomography scans were taken and reconstructed 3-dimensionally for all patients preoperatively and 1 year postoperatively...
January 1, 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29645352/the-uk-rope-study-efficacy-and-safety-of-prostate-artery-embolisation-for-benign-prostatic-hyperplasia-an-observational-study-and-propensity-matched-comparison-with-transurethral-resection-of-the-prostate
#9
A F Ray, J Powell, M J Speakman, N T Longford, R DasGupta, T Bryant, S Modi, J Dyer, M Harris, G Carolan-Rees, N Hacking
OBJECTIVES: The UK Register of Prostate Embolisation (UK ROPE) study aimed to assess the efficacy and safety of Prostate Artery Embolisation (PAE) for Lower Urinary Tract Symptoms secondary to Benign Prostatic Hyperplasia (LUTS/BPH) patients. The main secondary aim was an indirect comparison with transurethral resection of the prostate (TURP). SUBJECTS/PATIENTS AND METHODS: As a joint initiative between BSIR, BAUS and NICE, this study recruited 305 patients across 17 UK urological / interventional radiology centres: 216 PAE, 89 TURP...
April 12, 2018: BJU International
https://www.readbyqxmd.com/read/29643571/a-general-ct-reconstruction-algorithm-for-model-based-material-decomposition
#10
Steven Tilley, Wojciech Zbijewski, Jeffrey H Siewerdsen, J Webster Stayman
Material decomposition in CT has the potential to reduce artifacts and improve quantitative accuracy by utilizing spectral models and multi-energy scans. In this work we present a novel Model-Based Material Decomposition (MBMD) method based on an existing iterative reconstruction algorithm derived from a general non-linear forward model. A digital water phantom with inserts containing different concentrations of calcium was scanned on a kV switching system. We used the presented method to simultaneously reconstruct water and calcium material density images, and compared the results to an image domain and a projection domain decomposition method...
March 2018: Proceedings of SPIE
https://www.readbyqxmd.com/read/29643526/-exploring-a-new-method-for-superimposition-of-pre-treatment-and-post-treatment-mandibular-digital-dental-casts-in-adults
#11
F F Dai, Y Liu, T M Xu, G Chen
OBJECTIVE: To explore a cone beam computed tomography (CBCT)-independent method for mandibular digital dental cast superimposition to evaluate three-dimensional (3D) mandibular tooth movement after orthodontic treatment in adults, and to evaluate the accuracy of this method. METHODS: Fifteen post-extraction orthodontic treatment adults from the Department of Orthodontics, Peking University School and Hospital of Stomatology were included. All the patients had four first premolars extracted, and were treated with straight wire appliance...
April 18, 2018: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29629440/incidental-findings-based-on-anatomical-location-and-clinical-significance-in-cbct-scans-of-dental-implant-patients
#12
Sunil Mutalik, Kandasamy Rengasamy, Aditya Tadinada
OBJECTIVE: Several incidental findings with varying degrees of clinical significance are often found on cone beam computed tomography (CBCT) scans of the maxillofacial skeleton acquired for dental procedures. The present study analyzed CBCT scans of dental implant therapy patients to identify incidental findings and assign those findings an appropriate clinical significance. METHOD AND MATERIALS: A total of 500 CBCT scans of patients were evaluated for this study...
2018: Quintessence International
https://www.readbyqxmd.com/read/29628658/internal-tunneling-resorption-associated-with-invasive-cervical-resorption
#13
Pallav Mahesh Patni, Pradeep Jain, Sumeet Jain, Hemalatha Hiremath, Rolly Agarwal, Mona Jain Patni
Treating pathological defects that are caused by resorption in teeth can be challenging. The task is complicated further if the resorption extends beyond the restrains of the root. The aim of this report is to describe a case of extensive internal tunneling resorption (ITR) associated with invasive cervical resorption (ICR) in a maxillary right lateral incisor and its nonsurgical treatment. A 22-year-old male was referred to the department of endodontics with a chief complaint of discolored maxillary right lateral incisor or tooth 12 and a history of trauma...
January 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29628650/cone-beam-computed-tomographic-evaluation-of-remaining-dentin-thickness-in-bifurcated-roots-of-maxillary-first-premolars-after-rotary-instrumentation-and-post-space-preparation-an-in-vitro-study
#14
Shivani Mangal, Sylvia Mathew, B V Sreenivasa Murthy, Shruthi Nagaraja, K Dinesh, Poornima Ramesh
Background: Intraradicular procedures remove radicular dentin and jeopardizing longevity of a tooth. Traditional in vitro methods used to determine the remaining dentin thickness (RDT) have limitations. Aim: The aim is to evaluate, using cone-beam computed tomography (CBCT), RDT following rotary instrumentation and post space preparation in buccal and palatal roots of maxillary first premolars. Materials and Methods: Twenty-three maxillary first premolars with two roots were selected...
January 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29628644/cone-beam-computed-tomography-evaluation-of-curved-root-canals-prepared-using-reciprocal-rotary-files-and-rotational-rotary-files
#15
Angsana Jainaen, Nipitporn Mahakunakorn, Uthaiwan Arayatrakullikit, Pipop Sutthiprapaporn, Rajda Noisombat
Aim: The aim of this study is to compare curved root canal preparation between reciprocal rotary files and rotational rotary files in extracted teeth using cone-beam computed tomography (CBCT). The independent variable was the file type (reciprocal vs. rotary), and the primary outcome variable was the centering ratio of distance change after canal preparation. Secondary outcomes were canal transportation in extension and direction and the preparation time. Materials and Methods: Forty mesial root canals from extracted permanent molars with curvatures ranging between 25° and 45° were randomly divided into 4 groups...
January 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29627152/three-dimensional-radiographic-evaluation-of-root-migration-patterns-4-8-5-years-after-lower-third-molar-coronectomy-a-cone-beam-computed-tomography-study
#16
A W K Yeung, N S M Wong, M M Bornstein, Y Y Leung
This prospective study in patients with a follow-up of 4-8.5years aimed to describe the long-term, three-dimensional changes of coronectomized lower third molar roots. Pre- and postoperative cone beam computed tomography (CBCT) scans were compared. The distance of root migration, the direction of root translation and rotation, and the amount of bone regeneration at the adjacent second molar and superficially to the third molar root were recorded. Age, gender, time elapsed following surgery, the status of the retained root including, impaction pattern and depth of impaction were tested to check if they were influencing factors for the above outcomes...
April 4, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29624863/prevalence-and-measurement-of-anterior-loop-of-the-mandibular-canal-using-cbct-a-cross-sectional-study
#17
Pradeep Christopher J, Thenaruvi Marimuthu, Krithika C, Poorna Devadoss, Santhosh M Kumar
BACKGROUND: Anterior loop of the mental nerve is a very important anatomic landmark in implant placement and anterior mandibular osteotomies. PURPOSE: Two-dimensional imaging techniques are not competent enough to locate and measure the mental nerve loop in majority of the cases. Any injury to this loop results in pain/paresthesia/numbness in the region supplied by the mental nerve. The aim of this study is to analyze the prevalence and measure the length of the loop using cone beam computerized tomography (CBCT) and calculate the average length and prevalence so that a safe margin can be given while placing the implants or the osteotomy cuts in the premolar region...
April 6, 2018: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29624436/amniotic-band-syndrome-a-multidisciplinary-care-approach-to-the-treatment-of-a-rare-case
#18
Padma M Mukherjee, Marianella Natera, Howard Drew, Adriana Creanga
Amniotic band syndrome (ABS) is a rare developmental disorder associated with defects such as syndactyly, facial and/or palatal clefts, and dental anomalies like malformed or impacted teeth. In this report, a patient with ABS was successfully treated with orthodontic, endodontic, and periodontal therapies. Cone beam computed tomography revealed a unique eruptive path of the impacted central incisor through the incisive canal and cleft area. The tooth was occlusally and functionally stable after 1 year of treatment...
January 1, 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29623598/accuracy-of-two-dimensional-pharyngeal-airway-space-prediction-for-bimaxillary-orthognathic-surgery
#19
Amanda Lury Yamashita, Lilian Cristina Vessoni Iwaki, Gustavo Nascimento de Souza Pinto, Bárbara Aline Gerke, Mariliani Chicarelli, Liogi Iwaki Filho
PURPOSE: The aim of this retrospective study was to evaluate the accuracy of two-dimensional (2D) virtual surgical planning (VSP) of pharyngeal airway space (PAS) in patients submitted to bimaxillary orthognathic surgery. METHODS: This study was conducted with lateral cephalograms acquired through cone-beam computed tomography records of 33 patients, divided into group 1-patients submitted to maxillary advancement and mandibular setback (n = 17) and group 2-patients submitted to maxillomandibular advancement (n = 16)...
April 5, 2018: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29622857/spatial-resolution-and-noise-prediction-in-flat-panel-cone-beam-ct-penalized-likelihood-reconstruction
#20
W Wang, G J Gang, J H Siewerdsen, J W Stayman
Purpose: Model based iterative reconstruction (MBIR) algorithms such as penalized-likelihood (PL) methods have data-dependent and shift-variant image properties. Predictors of local reconstructed noise and resolution have found application in a number of methods that seek to understand, control, and optimize CT data acquisition and reconstruction parameters in a prospective fashion (as opposed to studies based on exhaustive evaluation). However, previous MBIR prediction methods have relied on idealized system models...
February 2018: Proceedings of SPIE
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