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https://www.readbyqxmd.com/read/29160405/dosimetry-in-cbct-with-different-protocols-emphasis-on-small-fovs-including-exams-for-tmj
#1
Helena Aguiar Ribeiro Nascimento, Marcos Ely Almeida Andrade, Marco Antonio Gomes Frazão, Eduarda Helena Leandro Nascimento, Flavia Maria Moraes Ramos-Perez, Deborah Queiroz Freitas
This study aimed to estimate the absorbed dose in cone beam computed tomography (CBCT) exams according to different exposure parameters and size and position of the field of view (FOV). In addition was compared the absorbed dose of two smaller FOV scans with that of a larger FOV scan for evaluation of temporomandibular joint (TMJ), as it is a bilateral structure. CBCT scans were obtained on OP300 Maxio unit varying scanning mode (standard, high and endo) as well as size (5x5, 6x8 and 8x15 cm) and positioning of FOV...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29160350/angle-s-class-ii-division-1-associated-to-mandibular-retrusion-and-skeletal-open-bite-a-5-year-post-orthodontic-orthopedic-treatment-follow-up
#2
Gustavo Tirado Rodrigues
Obtaining long term stability allied to functional and aesthetic balance is the main goal of any orthodontic-orthopedic therapy. This case report describes the orthodontic therapy applied to a 7-year-9-month old child, who presented a Class II, division 1 malocclusion associated to skeletal open bite. Functional and skeletal corrections (sagittally and vertically) were obtained by means of mandible advancement achieved with a closed Balter's bionator appliance followed by a fixed appliance. This approach showed to be efficient in accomplishing both functional and aesthetic goals, that were kept stable five years after the treatment was finished...
September 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29160349/average-interradicular-sites-for-miniscrew-insertion-should-dental-crowding-be-considered
#3
Michele Tepedino, Paolo M Cattaneo, Francesco Masedu, Claudio Chimenti
OBJECTIVE: To define a map of interradicular spaces where miniscrew can be likely placed at a level covered by attached gingiva, and to assess if a correlation between crowding and availability of space exists. METHODS: Panoramic radiographs and digital models of 40 patients were selected according to the inclusion criteria. Interradicular spaces were measured on panoramic radiographs, while tooth size-arch length discrepancy was assessed on digital models. Statistical analysis was performed to evaluate if interradicular spaces are influenced by the presence of crowding...
September 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29160345/influence-of-the-cranial-base-flexion-on-class-i-ii-and-iii-malocclusions-a-systematic-review
#4
Kélei Cristina Mathias de Almeida, Taísa Boamorte Raveli, Camila Ivini Viana Vieira, Ary Dos Santos-Pinto, Dirceu Barnabé Raveli
OBJECTIVE: The aim of this study was to perform a systematic review on the morphological characteristics of the skull base (flexion, anterior length and posterior length) and the concomitant development of malocclusions, by comparing differences in dimorphism, ethnicity and age. METHODS: The articles were selected by means of electronic search on BBO, MEDLINE and LILACS databases from 1966 to 2016. A qualitative evaluation of the methodologies used on the articles was also performed...
September 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29160343/the-effect-of-hard-tissue-surgical-changes-on-soft-tissue-displacement-a-pilot-cbct-study
#5
Leonardo Koerich, Daniel Paludo Brunetto, Eduardo Terumi Blatt Ohira
INTRODUCTION: This pilot study had as main objective to test the reliability of a new method to evaluate orthognathic surgery outcomes and also, to understand the effect of hard tissue changes on soft tissue displacement. METHODS: The sample consisted of eight patients that underwent bimaxillary advancement and had CBCT at two time points (before surgery and 6-8 months follow-up). Voxel-based cranial base superimposition was used to register the scans. A different technique of iterative closest point (ICP) was used to measure and correlate the changes...
September 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29160033/discordant-fetal-phenotype-of-hypophosphatasia-in-two-siblings
#6
Satoru Ikenoue, Kei Miyakoshi, Tomohiro Ishii, Yu Sato, Toshimitsu Otani, Yohei Akiba, Yoshifumi Kasuga, Daigo Ochiai, Tadashi Matsumoto, Yosuke Ichihashi, Yohei Matsuzaki, Kanako Tachikawa, Toshimi Michigami, Gen Nishimura, Kazushige Ikeda, Tomonobu Hasegawa, Mamoru Tanaka
Hypophosphatasia (HPP) is an autosomal recessive metabolic disorder with impaired bone mineralization due to mutations in the ALPL gene. The genotype-phenotype correlation of this disorder has been widely described. Here, we present two affected siblings, whose fetal phenotypes were discordant. A 31-year-old Japanese woman, G0P0, was referred to our institution because of fetal micromelia. After obstetric counseling, the pregnancy was terminated at 21 weeks' gestation. Post-mortem radiographs demonstrated severely defective mineralization of the skeleton...
November 21, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29158069/intraosseous-lipoma-of-the-maxillary-tuberosity-a-case-report
#7
Sasa Z Tabakovic, Milica Mijovic, Dragan Krasic, Dejan Z Tabakovic, Branislav Djerkovic
Intraosseous lipoma appears less frequently in the maxilla than in the mandible. The initial phase of tumor development is characterized by asymptomatic growth, followed by the presence of pain and paresthesia in the later stage. We report the case of a 43-year-old female patient who contacted a doctor because of periodic pains and stupor in the left side of the upper jaw. The exostosis-like formation was found by palpation, subsequently raising suspicion of an odontogenic tumor on the basis of panoramic imaging (dental orthopan)...
November 17, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29157548/imaging-of-benign-odontogenic-lesions
#8
REVIEW
William C Scarfe, Shiva Toghyani, Bruno Azevedo
Numerous benign cysts or solid tumors may present in the jaws. These arise from tooth-forming tissues in the dental alveolus or from nonodontogenic tissues in the basal bone of the mandible and maxilla. Radiologists provide 2 deliverables to assist in diagnosis and management: (1) appropriately formatted images demonstrating the location and extent of the lesion and (2) interpretive reports highlighting specific radiologic findings and an impression providing a radiologic differential diagnosis. This article provides guidance on essential image protocols for planning treatments, a radiologic differential diagnostic algorithm based on location and pattern recognition, and a summary of the main features of benign odontogenic lesions...
January 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29157547/imaging-of-odontogenic-infections
#9
REVIEW
Shaza Mardini, Anita Gohel
Odontogenic infections represent a common clinical problem in patients of all ages. The presence of teeth enables the direct spread of inflammatory products from dental caries, trauma, and/or periodontal disease into the maxilla and mandible. The radiographic changes seen depend on the type and duration of the inflammatory process and host body response. Imaging plays a central role in identifying the source of infection and the extent of the disease spread and in detecting any complications. Many different imaging modalities can be used...
January 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29157541/imaging-of-dentoalveolar-and-jaw-trauma
#10
REVIEW
Reyhaneh Alimohammadi
Prior to the invention of cone beam CT, use of 2-D plain film imaging for trauma involving the mandible was common practice, with CT imaging opted for in cases of more complex situations, especially in the maxilla and related structures. Cone beam CT has emerged as a reasonable and reliable alternative considering radiation dosage, image quality, and comfort for the patient. This article presents an overview of the patterns of dental and maxillofacial fractures using conventional and advanced imaging techniques illustrated with multiple clinical examples selected from the author's oral and maxillofacial radiology practice database...
January 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29157168/burkitt-non-hodgkin-lymphoma-presenting-with-mental-neuropathy-numb-chin-syndrome-in-an-hiv-positive-patient
#11
N Vora, H Haryee, J C Dickson, R F Miller
Mental nerve neuropathy is usually due to local trauma or dental causes, but may be a manifestation of malignancy. A patient with virologically controlled human immunodeficiency virus (HIV) infection presented with a 'numb chin' on the background of long-standing night sweats, malaise and weight loss, worsening respiratory symptoms, and lymphadenopathy. Burkitt non-Hodgkin lymphoma was diagnosed from histology of a lymph node. Imaging (magnetic resonance imaging and (18)fluorodeoxyglucose [FDG]-positron emission tomography-computed tomography [PET-CT]) showed abnormal intracranial enhancement of the right mandibular nerve and extensive (18)FDG-avid lymphadenopathy above and below the diaphragm, focal lesions in the spleen and within the right mandible...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/29156092/gingival-cyst-of-the-adult-lateral-periodontal-cyst-and-botryoid-odontogenic-cyst-an-updated-systematic-review
#12
REVIEW
Bruno Ramos Chrcanovic, Ricardo Santiago Gomez
OBJECTIVE: To integrate the available data published on gingival cyst of the adult (GCA), lateral periodontal cyst (LPC) and botryoid odontogenic cyst (BOC) into a comprehensive analysis of their clinical/radiologic features. METHODS: An electronic search was undertaken in July/2017. Eligibility criteria included publications having enough clinical/radiological/histological information to confirm the diagnosis. RESULTS: 146 publications (157 GCAs, 213 LPCs, 96 BOCs) were included...
November 20, 2017: Oral Diseases
https://www.readbyqxmd.com/read/29153731/bioactivity-of-photoactivated-functionalized-nanoparticles-assessed-in-lipopolysaccharide-contaminated-root-canals-in%C3%A2-vivo
#13
Annie Shrestha, Shimon Friedman, Calvin D Torneck, Anil Kishen
INTRODUCTION: The persistence of dentin-bound lipopolysaccharides (LPS) in disinfected root canals impedes treatment outcomes of endodontic procedures. This study assessed the effects of photoactivated rose bengal-functionalized chitosan nanoparticles (CSRBnps) on LPS-contaminated root dentin in vivo using an intraosseous implantation model and neotissue formation as a marker. METHODS: Fifty human, 3-mm-long root segments with a 1.2-mm canal lumen were divided into 5 groups (n = 10): group 1, canals not contaminated; group 2, canals contaminated with Pseudomonas aeruginosa LPS; group 3, canals contaminated and disinfected with sodium hypochlorite (NaOCl); group 4, canals contaminated and disinfected with NaOCl and calcium hydroxide; and group 5, canals contaminated and disinfected with NaOCl and CSRBnps (300 μg/mL) with photoactivation (λ = 540 nm, 40 J/cm(2))...
November 15, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29153240/acquired-abnormalities-of-the-temporomandibular-joint
#14
REVIEW
Anne-Frédérique Chouinard, Leonard B Kaban, Zachary S Peacock
Mandibular growth is a complex process that involves the "functional matrix," an interaction of the muscles of mastication, occlusion, and jaw function. Although not a typical growth center, the mandibular condyle has a significant effect on the ultimate size, shape and function of the mandible and secondarily on overall facial form. Acquired temporomandibular joint (TMJ)/condylar abnormalities, such as juvenile idiopathic arthritis, idiopathic condylar resorption, TMJ ankylosis, and condylar hyperplasia, often result in facial deformity and functional deficits...
February 2018: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/29153237/trauma-to-the-pediatric-temporomandibular-joint
#15
REVIEW
Sam S Bae, Sharon Aronovich
Management of pediatric condylar fractures presents a unique challenge because the developing mandible provides limited available bone for fixation and primary teeth preclude the use of typical closed reduction techniques. The available literature is reviewed with regard to closed and open treatment approaches.
February 2018: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/29152262/prosthetic-rehabilitation-of-edentulous-hemimandibulectomy-patient-a-clinical-report
#16
Shailendra Kumar Sahu, B K Motwani, Anurag Dani
Surgical resection of mandible causes deviation of mandible toward affected side, resulting in loss of occlusal contact. This article presents twin rows of nonanatomic teeth on the untreated side of maxillary complete denture. The palatal row helps in mastication, whereas the buccal row supports the cheeks and improves the aesthetics.
November 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29150379/changes-in-maxillofacial-morphology-and-velopharyngeal-function-with-two-stage-maxillary-distraction-mandibular-setback-surgery-in-patients-with-cleft-lip-and-palate
#17
T Susami, Y Mori, K Ohkubo, M Takahashi, Y Hirano, H Saijo, T Takato
Maxillary distraction is increasingly used for the correction of severe maxillary retrusion in patients with cleft lip and palate. However, control of the maxillary movement is difficult, and the need to wear visible distractors for a long period of time causes psychosocial problems. A two-stage surgical approach consisting of maxillary distraction and mandibular setback was developed to overcome these problems. In this study, changes in maxillofacial morphology and velopharyngeal function were examined in 22 patients with cleft lip and palate who underwent this two-stage approach...
November 14, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29150134/stress-generation-in-mandibular-anterior-teeth-restored-with-different-types-of-post-and-core-at-various-levels-of-ferrule
#18
Anatolii Savychuk, Marianthi Manda, Christos Galanis, Christofer Provatidis, Petros Koidis
STATEMENT OF PROBLEM: Pertinent evidence regarding the mechanical integrity of mandibular anterior teeth restored with a post-and-core is limited. PURPOSE: The purpose of this finite element analysis study was to compare the impact of the post type (glass fiber post-and-resin core or cast post-and-core) along with the ferrule effect on the stress fields generated in endodontically treated mandibular lateral incisors and canines. MATERIAL AND METHODS: Three-dimensional models of the segmented mandible were developed...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29149651/anthropometric-measurements-in-iranian-men
#19
Jaber Gharehdaghi, Maryam Baazm, Masoud Ghadipasha, Sadra Solhi, Farhoud Toutounchian
There is inevitable need for data regarding anthropometric measurements of each community's population. These anthropometric data have various applications, including health assessment, industrial designing, plastic & orthopedic surgery, nutritional studies, anatomical studies and forensic medicine investigations. Anthropometric parameters vary from race to race throughout the world, hence providing an anthropometric profile model of residents of different geographic regions seems to be necessary. To our knowledge, there is no report of bone parameters of the Iranian population...
November 14, 2017: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/29147823/primary-peri-implant-oral-intra-epithelial-neoplasia-carcinoma-in-situ-a-case-report-considering-risk-factors-for-carcinogenesis
#20
Makoto Noguchi, Hiroaki Tsuno, Risa Ishizaka, Kumiko Fujiwara, Shuichi Imaue, Kei Tomihara, Takashi Minamisaka
BACKGROUND: Major risk factors for oral squamous cell carcinoma (SCC) are tobacco smoking, a betel quid chewing habit, and heavy alcohol consumption. However, around 15% of oral SCCs cannot be explained by these risk factors. Although oral SCC associated with dental implants is quite rare, there has been a recent gradual accumulation of reports about it. Here, we report a case of primary peri-implant oral intra-epithelial neoplasia/carcinoma in situ (OIN/CIS) in a woman without the major risk factors for oral SCC...
November 16, 2017: International Journal of Implant Dentistry
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