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Paul Monsarrat, Bertrand Arcaute, Ove A Peters, Elisabeth Maury, Norbert Telmon, Marie Georgelin-Gurgel, Delphine Maret
OBJECTIVES: In endodontic practice, clinicians should be aware of possible root canal anatomic variations. The aim of this study was to assess using CBCT acquisitions regarding whether one root canal anatomy of a tooth is associated with a specific anatomy of another tooth. METHODS: A total of 106 CBCT acquisitions were obtained using a CBCT scanner with 200μm voxel size. Numbers of roots and canals of the entire dentition were described. Bivariate analyses and logistic regressions were conducted to explore root canal anatomy on one tooth according to age, gender, jaw, side and the others teeth...
2016: PloS One
Suleyman Kutalmiş Buyuk, Mevlut Celikoglu, Yasin Atakan Benkli, Ahmet Ercan Sekerci
AIM: The aim of the study was to evaluate the transverse craniofacial morphology of the adolescent patients affected by unilateral cleft lip and palate (UCLP) and to compare the findings with age- and sex-matched control group without any cleft using their cone-beam computed tomography (CBCT) images. METHODS: The study sample (n = 56 patients; mean age: 14.35 ± 3.06 years) consisted of 26 UCLP (n = 26 patients; 10 women and 16 men; mean age: 13.70 ± 2...
October 2016: Journal of Craniofacial Surgery
Michael Dau, Amir Edalatpour, Ralf Schulze, Bilal Al-Nawas, Abdulmonem Alshihri, Peer W Kämmerer
OBJECTIVES: The aim of this study was to compare the subjective quality rating of panoramic radiography (PAN) and cone beam computed tomography (CBCT) in planning of dental implant procedures by clinicians with different educational background. METHODS: Radiographic images (PAN and CBCT) of 42 patients were examined as follows: 10 maxillary (MX) anterior region, 16 MX posterior region and 16 mandibular (MD) posterior region. These sites were used for planning of dental implant insertion...
October 19, 2016: Dento Maxillo Facial Radiology
Massimo Del Fabbro, Stefano Corbella, Patrick Sequeira-Byron, Igor Tsesis, Eyal Rosen, Alessandra Lolato, Silvio Taschieri
BACKGROUND: When primary root canal therapy fails, periapical lesions can be retreated with or without surgery. Root canal retreatment is a non-surgical procedure that involves removal of root canal filling materials from the tooth, followed by cleaning, shaping and obturating of the canals. Root-end resection is a surgical procedure that involves exposure of the periapical lesion through an osteotomy, surgical removal of the lesion, removal of part of the root-end tip, disinfection and, commonly, retrograde sealing or filling of the apical portion of the remaining root canal...
October 19, 2016: Cochrane Database of Systematic Reviews
Thomas Young Ho Yoon, Richard A Michaud, Mitesh Patel, Alexandra M Manibo
OBJECTIVE: This study was conducted to evaluate variations in and the prevalence of the lingual concavity. MATERIALS & METHODS: This study used images taken between January 1st, 2011 and August 31st, 2015 from a total of 104 patient charts randomly selected from a private practice. These images were all acquired from a single cone beam computed tomography (CBCT) machine. The CBCT's were reviewed in cross sectional images of both the left and right anterior incisor and posterior molar regions...
October 19, 2016: Journal of Oral Implantology
Christian Güldner, Isabell Diogo, Eva Bernd, Stephanie Dräger, Magis Mandapathil, Afshin Teymoortash, Hesham Negm, Thomas Wilhelm
Cone beam computed tomography (CBCT, syn. digital volume tomography = DVT) was introduced into ENT imaging more than 10 years ago. The main focus was on imaging of the paranasal sinuses and traumatology of the mid face. In recent years, it has also been used in imaging of chronic ear diseases (especially in visualizing middle and inner ear implants), but an exact description of the advantages and limitations of visualizing precise anatomy in a relevant number of patients is still missing. The data sets of CBCT imaging of the middle and inner ear of 204 patients were analyzed regarding the visualization of 18 different anatomic structures...
October 17, 2016: European Archives of Oto-rhino-laryngology
Lawrence Lechuga, Georg A Weidlich
A comparison of image quality and dose delivered between two differing computed tomography (CT) imaging modalities-fan beam and cone beam-was performed. A literature review of quantitative analyses for various image quality aspects such as uniformity, signal-to-noise ratio, artifact presence, spatial resolution, modulation transfer function (MTF), and low contrast resolution was generated. With these aspects quantified, cone beam computed tomography (CBCT) shows a superior spatial resolution to that of fan beam, while fan beam shows a greater ability to produce clear and anatomically correct images with better soft tissue differentiation...
September 12, 2016: Curēus
Tsuneji Okada, Toru Kanai, Noriko Tachikawa, Motohiro Munakata, Shohei Kasugai
BACKGROUND: The long-term stability of maxillary sinus floor augmentation with β-TCP remains largely unknown. We report the long-term assessment of volumetric changes in maxillary sinus floor augmentation with β-TCP by cone-beam computed tomography (CBCT). METHODS: The subjects included 30 patients who underwent maxillary sinus floor augmentation using β-TCP and 58 implant placement for unilateral maxillary defect, simultaneously. Volumetric changes in β-TCP and the height of peri-implant bone were analyzed by CBCT...
December 2016: Int J Implant Dent
Ahmed M Abdelhamid, Kenda I Hanno, Mohamed H Imam
BACKGROUND: The purpose of this prospective cross-over study is to evaluate the effect of bilateral balanced occlusion and canine guidance occlusion on the masseter muscle activity using implant-retained mandibular overdentures. METHODS: After evaluation of 12 completely edentulous patients using cone beam computed tomography (CBCT), mucoperiosteal flaps were reflected exposing the mandibular interforaminal region. Two implants were placed in the interforaminal region for each of the 12 patients...
December 2015: Int J Implant Dent
Johann Malina-Altzinger, Georg Damerau, Klaus W Grätz, P D Bernd Stadlinger
BACKGROUND: The aim of this study was to evaluate the validity and the inter- and intra-examiner reliability of panoramic-radiograph-driven findings of different maxillary sinus anatomic variations and pathologies, which had initially been prediagnosed by cone beam computed tomography (CBCT). METHODS: After pairs of two-dimensional (2D) panoramic and three-dimensional (3D) CBCT images of patients having received treatment at the outpatient department had been screened, the predefinition of 54 selected maxillary sinus conditions was initially performed on CBCT images by two blinded consultants individually using a questionnaire that defined ten different clinically relevant findings...
December 2015: Int J Implant Dent
Kirsten W Slagter, Gerry M Raghoebar, Arjan Vissink, Henny J A Meijer
BACKGROUND: Sufficient buccal bone is important for optimal esthetic results of implant treatment in the anterior region. It can be measured with cone beam computed tomography (CBCT), but background scattering and problems with standardization of the measurements are encountered. The aim was to develop a method for reliable, reproducible measurements on CBCTs. METHODS: Using a new method, buccal bone thickness was measured on ten CBCTs at six positions along the implant axis...
December 2015: Int J Implant Dent
Masahiro Wada, Yasutane Tsuiki, Tohru Suganami, Kazunori Ikebe, Motofumi Sogo, Ikuhisa Okuno, Yoshinobu Maeda
BACKGROUND: The aim of this study is to investigate the correlation between the thickness of the cortical bone or the voxel values that are obtained by cone beam CT (CBCT) and the insertion torque values (ITVs) or the implant stability quotient (ISQ) values. METHODS: A pig's ilium was used as the implant placement site. The implants used in this study were two kinds of diameters (3.8 mm, 5.0 mm) and two kinds of lengths (7.0 mm, 12.0 mm) having a general threadlike shape with a mechanically polished surface...
December 2015: Int J Implant Dent
Kerstin Mueller, Rebecca Fahrig, Michael Manhart, Yu Deuerling-Zheng, Jarrett Rosenberg, Teri Moore, Arundhuti Ganguly, Nishita Kothary
RATIONALE AND OBJECTIVES: Intra-procedural measurement of hepatic perfusion following liver embolization continues to be a challenge. Blood volume imaging before and after interventional procedures would allow identifying the treatment end point or even allow predicting treatment outcome. Recent liver oncology studies showed the feasibility of parenchymal blood volume (PBV) imaging using an angiographic C-arm system. This study was done to evaluate the reproducibility of PBV measurements using cone beam computed tomography (CBCT) before and after embolization of the liver in a swine model...
October 10, 2016: Academic Radiology
Hitoshi Maemoto, Takafumi Toita, Takuro Ariga, Joichi Heianna, Tsuneo Yamashiro, Sadayuki Murayama
To determine the predictive factors affecting uterine movement during radiotherapy (RT), we quantified interfraction uterine movement using computed tomography (CT) and cone-beam CT (CBCT). A total of 38 patients who underwent definitive RT for cervical cancer were retrospectively analyzed. We compared pre-RT planning CT (n = 38) and intratreatment CBCT (n = 315), measuring cervical and corporal movement in each direction. Correlations between uterine movement and volume changes of the bladder and rectum on all CBCT scans were analyzed using Spearman rank correlation analysis...
October 15, 2016: Journal of Radiation Research
Vikneswary Batumalai, Penny Phan, Callie Choong, Lois Holloway, Geoff P Delaney
INTRODUCTION: To compare the differences in setup errors measured with electronic portal image (EPI) and cone-beam computed tomography (CBCT) in patients undergoing tangential breast radiotherapy (RT). Relationship between setup errors, body mass index (BMI) and breast size was assessed. METHODS: Twenty-five patients undergoing postoperative RT to the breast were consented for this study. Weekly CBCT scans were acquired and retrospectively registered to the planning CT in three dimensions, first using bony anatomy for bony registration (CBCT-B) and again using breast tissue outline for soft tissue registration (CBCT-S)...
May 31, 2016: Journal of Medical Radiation Sciences
Cheng-Guang Lin, Sen-Kui Xu, Wen-Yan Yao, Yu-Qi Wu, Jian-Lan Fang, Vincent W C Wu
INTRODUCTION: In intensity modulated radiotherapy (IMRT) of nasopharyngeal carcinoma (NPC) patients, an effective immobilisation system is important to minimise set up deviation. This study evaluated the effectiveness of three immobilisation systems by assessing their set up deviations. METHODS: Patients were randomly assigned to one of the three immobilisation systems: (1) supine on head rest and base plate (HB); (2) supine with alpha cradle supporting the head and shoulder (AC); (3) supine with vacuum bag supporting the head and shoulder (VB)...
September 1, 2016: Journal of Medical Radiation Sciences
Jacques Vermeulen
PURPOSE: To investigate the difference in accuracy between freehand and guided single-implant placement in situations with one or more missing teeth as performed by experienced surgeons. MATERIALS AND METHODS: A total of 80 implants were placed by 10 experienced clinicians in the anterior site of maxillary models, made of polyamide by selective laser sintering and mounted in a dummy head. Each clinician performed the same four single-implant cases via freehand surgery and then with a three-dimensional fabricated SIMPLANT Guide...
October 14, 2016: International Journal of Oral & Maxillofacial Implants
Rodrigo Dos Santos Pereira, Fernanda Brasil Boos, Luis Fernado Gorla, Idelmo Rangel Garcia, Roberta Okamoto, Eduardo Hochuli-Vieira
The aim of this study was to compare the bone resorption rate and histometry of ChronOS, a beta-tricalcium phosphate (β-TCP), mixed with autogenous bone grafts (1:1) with that of autogenous bone grafts alone in maxillary sinus elevation surgery. A total of 12 maxillary sinuses were grafted with an autogenous bone graft (control group) and 9 with ChronOS mixed with an autogenous bone graft (test group). Postoperative cone beam computed tomography (CBCT) was used to measure the initial graft volume after 15 days (T₁), and 6 months later another CBCT scan was performed to evaluate the final graft volume (T₂) and determine the graft resorption rate...
November 2016: International Journal of Periodontics & Restorative Dentistry
I Diogo, U Walliczeck, J Taube, N Franke, A Teymoortash, J Werner, C Güldner
Due to an increasing number of cochlear implantations, quality control has become more important. In addition to intraoperative biophysical measurements, radiological imaging is another possibility. An upcoming technique regarding this is Cone Beam CT (CBCT). Sixty-five data sets (35 Nucleus Contour Advance-Cochlear; 30 Flex Soft-MedEl) of postoperative imaging by CBCT (Accu-I-tomo F17, Morita, Kyoto, Japan) underwent further evaluation. Insertion angle, height of the cochlea, distance of the electrode to the medial or lateral wall, angle between chorda tympani and facial nerve and the precise position of the electrode cable in the facial-chordal angle were determined...
August 2016: Acta Otorhinolaryngologica Italica
Heraldo L D da Silveira, Mathias P Fontana, Heloísa E D da Silveira
No abstract text is available yet for this article.
October 12, 2016: Dento Maxillo Facial Radiology
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