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Cone beam computed tomography

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https://www.readbyqxmd.com/read/29148597/three-dimensional-analysis-of-bone-remodeling-following-ridge-augmentation-of-compromised-extraction-sockets-in-periodontitis-patients-a-randomized-controlled-study
#1
Mario Aimetti, Valeria Manavella, Lisa Corano, Elena Ercoli, Cristina Bignardi, Federica Romano
OBJECTIVES: The aim of this study was to analyze linear and volumetric hard tissue changes in severely resorbed alveolar sockets after ridge augmentation procedure and to compare them with spontaneous healing using three-dimensional cone beam computed tomography (CBCT). MATERIAL AND METHODS: Thirty patients (mean age 53.2 ± 6.3 years) requiring tooth extraction for advanced periodontitis were randomly allocated to test and control groups. The test sites were grafted using a collagenated bovine-derived bone (DBBM-C) covered with a collagen membrane, while control sites had spontaneous healing...
November 17, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29146395/correlation-between-intraoperative-proximal-segment-rotation-and-post-sagittal-split-ramus-osteotomy-relapse-a-three-dimensional-cone-beam-computed-tomography-study
#2
B-J Choi, B-S Lee, Y-D Kwon, J-W Lee, S-U Yun, K-S Ryu, J-Y Ohe
This study evaluated the effects of proximal segment rotation and the extent of mandibular setback on post-sagittal split ramus osteotomy (SSRO) relapse using three-dimensional (3D) analysis. Thirty-one patients diagnosed with a skeletal class III malocclusion who underwent SSRO alone were enrolled in this study. The movements of the mandibular condyles were assessed using cone beam computed tomography (CBCT) and a 3D imaging program at ≤1 month before the operation (T0), 1 week after the operation (T1), and 6 months (T2) and 1year (T3) postoperative...
November 13, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29145529/volumetric-bone-measurement-around-dental-implants-using-3d-image-superimposition-a-methodological-and-clinical-pilot-study
#3
Eduardo Aydos Villarinho, André Correia, Alvaro Vigo, Nuno Viriato Ramos, Mário Augusto Pires Vaz, Rosemary Sadami Arai Shinkai
PURPOSE: This study describes the development of a methodology for using three-dimensional (3D) image superimposition to measure volumetric changes in bone level around dental implants in comparison with linear measures. MATERIALS AND METHODS: The sample was comprised of 46 dental implants of 6-mm length and 4.1-mm diameter placed in the posterior maxilla and posterior mandible in 20 patients. All implants received screw-retained single crowns. Radiographic images were taken using cone beam computed tomography (CBCT) and digital periapical radiography after implantation and after 12 and 24 months of functional loading (after crown installation)...
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29145525/association-between-missing-posterior-teeth-and-occurrence-of-temporomandibular-joint-condylar-erosion-a-cone-beam-computed-tomography-study
#4
Felix Bertram, Linus Hupp, Dagmar Schnabl, Ansgar Rudisch, Rüdiger Emshoff
PURPOSE: To determine a possible association between asymptomatic temporomandibular joint (TMJ) condylar erosion and the number of missing posterior teeth and their location, as well as the number of dental quadrants with missing posterior teeth. MATERIALS AND METHODS: This case-control study involved 210 patients (male to female ratio = 98:112) aged 16-74 years, with 105 asymptomatic patients with TMJ condylar erosion and a control group of 105 patients without TMJ condylar erosion...
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29143462/evaluation-of-immediate-implants-augmented-with-autogenous-bone-melatonin-composite-graft-in-the-esthetic-zone-a-randomized-controlled-trial
#5
Hala H A Hazzaa, Naglaa Sh El-Kilani, Shadia Abd-Elhameed Elsayed, Phoebe M Abd El Massieh
PURPOSE: To evaluate the clinical and radiographic outcomes following the application of autogenous bone (ABG)/melatonin composite graft around immediate implants in the esthetic zone compared to ABG alone. MATERIALS AND METHODS: Twenty-six patients with two nonrestorable anterior/premolar teeth were randomly classified into two equal groups. Dental implants were immediately inserted either with ABG (control group) or ABG/melatonin (test group). Outcome measures were peri-implant sulcus depth (PD), gingival index (GI), and wound healing scores...
November 16, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29142872/isolated-tympanic-plate-fracture-detected-by-cone-beam-computed-tomography-report-of-four-cases-with-review-of-literature
#6
Ashita Ritesh Kalaskar, Ritesh Kalaskar
The tympanic plate is a small part of the temporal bone that separates the mandibular condyle from the external auditory canal. Fracture of this small plate is rare and usually associated with other bony fractures, mainly temporal and mandibular bone. There is a limited amount of literature on this subject, which increases the chance of cases being overlooked by physicians and radiologists. This is further supported by purely isolated cases of tympanic plate fracture without evidence of other bony fractures...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29142656/pharyngeal-airway-dimensions-and-head-posture-in-obstructive-sleep-apnea-patients-with-and-without-morphological-deviations-in-the-upper-cervical-spine
#7
Liselotte Sonnesen, Arne Petersson, Søren Berg, Palle Svanholt
Objectives: The aim of the study was to analyse differences in pharyngeal airway dimensions and head posture between obstructive sleep apnea patients with and without morphological deviations in the upper cervical spine and to analyse associations between pharyngeal airway dimensions and head posture in the total sample. Material and Methods: The sample comprised 53 obstructive sleep apnea (OSA) patients of which 32.1% had upper spine morphological deviations. Accordingly two groups were defined: 17 OSA patients with morphological deviations in the upper spine and 36 without upper spine deviations...
July 2017: Journal of Oral & Maxillofacial Research
https://www.readbyqxmd.com/read/29140385/virtual-treatment-planning-for-implant-retained-nasal-prosthesis-a-clinical-report
#8
Muaiyed Mahmoud Buzayan, Norsiah Binti Yunu, Ha Kien Oon, Omar Tawfiq
Osseointegrated craniofacial implants have improved retention and patients' perceptions of implant-retained nasal prostheses; however, the determination of the available bone sites for implant placement post-rhinectomy is difficult. This case report describes the use of cone beam computed tomography scanning and computer-assisted virtual planning in conjunction with digital photographs for rehabilitation of a facial defect with an implant-retained silicon nasal prosthesis. Two implants were planned in the anatomical area with adequate bone volume to achieve favorable cosmetic outcomes and accessibility for hygiene maintenance...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140383/a-randomized-split-mouth-clinical-trial-on-effectiveness-of-amnion-chorion-membranes-in-alveolar-ridge-preservation-a-clinical-radiologic-and-morphometric-study
#9
Muyeenul Hassan, Sivaraman Prakasam, Carol Bain, Ahmed Ghoneima, Sean Shih-Yao Liu
PURPOSE: Recent case reports suggest that amnion-chorion membranes (ACM) and dense polytetrafluoroethylene membranes (dPTFE) can be left exposed during ridge preservation. The aim of this study was to compare the effectiveness of these membranes in ridge preservation, particularly when they are intentionally left exposed. MATERIALS AND METHODS: A split-mouth, single-blind, randomized trial design was used to compare treatments with the two membranes in 22 nonmolar sites on the same arch...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140376/evaluating-maxillary-sinus-septa-using-cone-beam-computed-tomography-is-there-a-difference-in-frequency-and-type-between-the-dentate-and-edentulous-posterior-maxilla
#10
Martina Schriber, Thomas von Arx, Pedram Sendi, Reinhilde Jacobs, Valerie Ga Suter, Michael M Bornstein
PURPOSE: To analyze and compare the frequency, type, and location of maxillary sinus septa in patients with a dentate and an edentulous posterior maxilla using cone beam computed tomography (CBCT) imaging. MATERIALS AND METHODS: The study consisted of 100 maxillary sinuses: 50 from patients with a dentate and 50 from patients with an edentulous posterior maxilla. The aim was to assess the frequency, morphology, and location of maxillary sinus septa in axial, sagittal, and coronal CBCT images...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140370/mandibular-bone-structure-analysis-using-cone-beam-computed-tomography-vs-primary-implant-stability-an-ex-vivo-study
#11
Ruben Pauwels, Somchai Sessirisombat, Soontra Panmekiate
PURPOSE: To evaluate the relationship between mandibular bone structure parameters measured on preimplant cone beam computed tomography (CBCT) images and primary implant stability. MATERIALS AND METHODS: Twenty-one hemimandibles were scanned on the 3D Accuitomo 170 CBCT. Next, an implant was placed in each hemimandible, after which insertion torque and implant stability quotient (ISQ) measurements were acquired. The following measurements were performed on the preimplant CBCT scans: bone surface, bone volume, fractal dimension, connectivity, trabecular thickness and spacing, and skeleton analysis...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140101/fabrication-of-a-surgical-guide-for-lateral-sinus-augmentation
#12
Robert Stanley, Gregori M Kurtzman
Cone-beam computed tomography (CBCT) scans are used in planning implant treatment to help determine volume of available bone and identify anatomical structures. This enhances planning, particularly when inadequate bone is present in the posterior maxilla due to proximity of the inferior aspect of the maxillary sinus to the crestal bone. To place dental implants into this area, sinus augmentation is often needed to provide sufficient bone volume to support implants and allow prosthetic loading with predictable long-term results...
November 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/29138952/age-estimation-by-assessment-of-pulp-chamber-volume-a-bayesian-network-for-the-evaluation-of-dental-evidence
#13
Emanuele Sironi, Franco Taroni, Claudio Baldinotti, Cosimo Nardi, Gian-Aristide Norelli, Matteo Gallidabino, Vilma Pinchi
PURPOSE: The present study aimed to investigate the performance of a Bayesian method in the evaluation of dental age-related evidence collected by means of a geometrical approximation procedure of the pulp chamber volume. Measurement of this volume was based on three-dimensional cone beam computed tomography images. METHODS: The Bayesian method was applied by means of a probabilistic graphical model, namely a Bayesian network. Performance of that method was investigated in terms of accuracy and bias of the decisional outcomes...
November 14, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29135734/cone-beam-computed-tomography-assessment-of-accessory-infraorbital-foramen-and-determination-of-infraorbital-foramen-position
#14
Ibrahim K Ali, Kaustubh Sansare, Freny R Karjodkar, Prashant Salve
There is no evidence about evaluating accessory infraorbital foramen by 3-dimensional analysis like multi slice computed tomography or cone beam computed tomography (CBCT) in human subjects. To authors' best knowledge this is a first study to assess the accessory infraorbital foramen and position of infraorbital foramen in relation to crown of maxillary teeth using CBCT. This study primarily aimed to assess the location and number of accessory infraorbital foramen (AIOF), to measure the distance between main infraorbital foramen and AIOF and secondarily to determine the position of infraorbital foramen in relation to crowns of maxillary second premolar, first molar, and second molar...
November 9, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29130140/transforaminal-intrathecal-delivery-of-nusinersen-using-cone-beam-computed-tomography-for-children-with-spinal-muscular-atrophy-and-extensive-surgical-instrumentation-early-results-of-technical-success-and-safety
#15
John J Weaver, Niranjana Natarajan, Dennis W W Shaw, Susan D Apkon, Kevin S H Koo, Giri M Shivaram, Eric J Monroe
BACKGROUND: Nusinersen, the only treatment approved by the United States Food and Drug Administration for spinal muscular atrophy (SMA), is delivered intrathecally. Many children with SMA have extensive spinal instrumentation and deformities, often precluding the use of standard approaches for gaining intrathecal access. Furthermore the anatomical distortion that often occurs with rotoscoliosis can complicate the use of fluoroscopic guidance. Compared to fluoroscopy, CT affords superior guidance for complex needle placements...
November 13, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29125931/outcome-analysis-and-unexpected-scenario-prediction-in-2-stage-orthodontic-lower-third-molar-extraction
#16
Tze-Ta Huang, Chen-Jung Chang, Ken-Chung Chen, Jen-Bang Lo, Meng-Yen Chen, Jehn-Shyun Huang
PURPOSE: We propose a 2-stage orthodontic lower third molar extraction procedure to reduce iatrogenic inferior alveolar nerve injury. We tested our hypothesis that there are factors that can predict both dislodgement of the root portion and limited traction distances. PATIENTS AND METHODS: Fifteen patients (mean age, 25.7 years; age range, 17 to 65 years) with 20 lower third molars were enrolled. Panoramic films and cone beam computed tomography were analyzed...
October 16, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29125035/cone-beam-computed-tomography-cbct-for-adaptive-image-guided-head-and-neck-radiation-therapy
#17
Christian A Hvid, Ulrik V Elstrøm, Kenneth Jensen, Cai Grau
BACKGROUND: Adaptive (ART) and image guided radiation therapy (IGRT) can improve target coverage and reduce unnecessary irradiation of organs at risk (OAR). The purpose of this study is to report the results of using mid-course imaging and a novel workflow with cone-beam computed tomography (CBCT) surveillance of dose to OAR to trigger adaptive replanning in head and neck radiotherapy. MATERIAL AND METHODS: Impact of radiation therapist (RTT) managed match protocol and mid-course imaging was assessed in two cohorts of consecutive patients receiving RT to the head and neck region, using computed tomography (CT) and CBCT-based dose verification respectively...
November 10, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/29124381/intraprocedural-3d-perfusion-measurement-during-chemoembolisation-with-doxorubicin-eluting-beads-in-liver-metastases-of-malignant-melanoma
#18
Philippe L Pereira, Kristina Krüger, Ernst Hohenstein, Florian Welke, Christof Sommer, Friedegund Meier, Thomas Eigentler, Claus Garbe
OBJECTIVES: To study feasibility and validity of a new software application for intraprocedural assessment of perfusion during chemoembolisation of melanoma metastases. METHODOLOGY: In a prospective phase-II trial, ten melanoma patients with liver-only metastases underwent chemoembolisation with doxorubicin-eluting beads (DEBDOX-TACE). Tumour perfusion was evaluated immediately before and after treatment at cone beam computer tomography (CBCT) using a new software application...
November 9, 2017: European Radiology
https://www.readbyqxmd.com/read/29124343/anatomical-landmarks-of-mandibular-interforaminal-region-related-to-dental-implant-placement-with-3d-cbct-comparison-between-edentulous-and-dental-mandibles
#19
Elif Sener, Erinc Onem, Gulcan Coskun Akar, Figen Govsa, Mehmet Asim Ozer, Yelda Pinar, Ali Mert, B Guniz Baksi Sen
BACKGROUND: Anterior mandibular (interforaminal) region is important in implant applications as it serves a basis for neurovascular bedding and holds the prosthesis for patients. Treatment planning for dental implant patients is often complicated by the unknown extent of the anterior loop of the neurovascular bundle. Anatomical structures including mandibular incisive canal (MIC) and lingual foramen (LF) should also be examined as part of the detailed analysis for their neurovascular structures...
November 9, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29122361/ventilation-measured-on-clinical-4d-cbct-increased-ventilation-accuracy-through-improved-image-quality
#20
Kasper R Jensen, Carsten Brink, Olfred Hansen, Uffe Bernchou
BACKGROUND AND PURPOSE: Ventilation measured on 4D cone-beam computed tomography (CBCT) using deformable image registration (DIR) may predict specific radiation sensitivity, but the measurement is affected by the current image quality. With 4D computed tomography (CT) measured ventilation acting as a gold standard the current study investigates if image improvements increase the accuracy of 4D-CBCT measured ventilation. MATERIAL AND METHODS: The study consists of 4D-CBCT and 4D-CT scans of 20 non-small-cell lung cancer patients...
November 6, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
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