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https://www.readbyqxmd.com/read/29786819/evaluation-of-pterygoid-plate-fractures-unrelated-to-le-fort-fractures-using-maxillofacial-computed-tomography
#1
Serra Özbal Güneş, Yeliz Aktürk, Esra Soyer Güldoğan
BACKGROUND: This study aims to describe the major pterygoid plate fractures (PPFs) patterns unrelated to Le Fort fractures (LFFs) using maxillofacial computed tomography (CT). METHODS: After obtaining our hospital ethics committee approval (37-05), data for PPF were acquired from the medical records of all the trauma patients who were diagnosed using CT at our hospital from April 2014 to April 2017. RESULTS: Of the 178 patients, 135 (male/female = 86/49; mean age = 37...
May 2018: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29785677/analysis-of-the-frequency-of-visualization-of-morphological-variations-in-anatomical-bone-features-in-the-mandibular-interforaminal-region-through-cone-beam-computed-tomography
#2
Marilza do Carmo Oliveira, Tamara Kerber Tedesco, Thais Gimenez, Sergio Allegrini
PURPOSE: The purpose of this study was to analyze the frequency of visualization of anatomical bone features and their possible variations in the mandibular interforaminal region through cone-beam computed tomography (CBCT). METHODS: This is a cross-sectional study that evaluated CBCT scans of the mandible of 141 women and 61 men, obtained by imaging archives from two private clinics of dental radiology. The study analyzed the frequency of visualization of: lingual symphyseal foramen (LSF), additional mental foramen (AdMF), absence of mental foramen (AbMF), mandibular incisive canal (MIC), and anterior loop (AL)...
May 21, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29785343/perinatal-specimens-of-maiasaura-from-the-upper-cretaceous-of-montana-usa-insights-into-the-early-ontogeny-of-saurolophine-hadrosaurid-dinosaurs
#3
Albert Prieto-Marquez, Merrilee F Guenther
Perinatal specimens of hadrosaurids discovered in the late 1970's by field crews from Princeton University were significant in providing evidence of the early ontogenetic stages in North American dinosaurs. These specimens from the Campanian (Upper Cretaceous) Two Medicine Formation of Montana consist of over a dozen skeletons referable to the saurolophine hadrosaurid Maiasaura peeblesorum , but never fully figured or described. Here, we provide a more complete documentation of the morphology of these specimens, along with an examination of variation during a large span of the development of saurolophine hadrosaurids...
2018: PeerJ
https://www.readbyqxmd.com/read/29785185/morphometric-analysis-of-the-mental-foramen-using-cone-beam-computed-tomography
#4
Rudyard Dos Santos Oliveira, Maria Rodrigues Coutinho, Francine Kühl Panzarella
This study evaluated the effects of age and sex on the location and size of the mental foramen (MF). A total of 104 cone-beam computed tomography (CBCT) scans from patients' aged 18-80 years were selected. Images were evaluated using the following parameters: position and size of the MF, and Distances A (distance from the upper limit of the MF to the apex of the first lower premolar), B (distance from the upper cortical border of the MF to the alveolar crest), and C (distance from the border of the MF to the base of the mandible)...
2018: International Journal of Dentistry
https://www.readbyqxmd.com/read/29783243/-electromyographic-characteristics-of-temporal-and-masticatory-muscles-in-patients-with-compression-dislocation-dysfunction-of-temporomandibular-joints-of-different-severity
#5
Pavlo I Yatsenko, Oleg V Rybalov, Oleg I Yatsenko, Vadym M Novikov, Dmytro M Kоrol, Dmytro D Kindiy, Victor D Kindiy
OBJECTIVE: Introduction: The main causes of dysfunctional conditions of the temporomandibular joints (TMJ), are occlusal, neurogenic, orthodontic disorders. The muscular component of TMJ is determines the dynamic anatomical and functional state of the mandible Therefore, in the diagnosis of dysfunctions and understanding of their pathogenesis belongs to the electromyographic method of investigation. The aim of the work was a comparative assessment of the bioelectrical activity of the actual chewing and temporal muscles in patients with musculo-articular compressiondislocation dysfunction of the TMJ of various severity...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29782813/actinomycotic-osteomyelitis-of-the-mandible-diagnosed-using-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-a-case-report
#6
Shinsuke Yamamoto, Hiroshi Takegawa, Naoki Taniike, Toshihiko Takenobu
Actinomycosis is a rare, chronic, slowly progressive granulomatous disease caused by filamentous gram-positive anaerobic bacteria from the Actinomycetaceae family (genus Actinomyces). It has become a rare condition because of the widespread use of antibiotics. When clinical symptoms are not typical, diagnosis of this condition becomes difficult. This report describes a case involving an 82-year-old woman who was diagnosed with actinomycotic osteomyelitis of the mandible using matrix assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS)...
April 26, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29782597/low-dose-radiation-18f-fluoride-pet-ct-in-the-assessment-of-unilateral-condylar-hyperplasia-of-the-mandible-preliminary-results-of-a-single-centre-experience
#7
G M Lima, S Diodato, E Costabile, G Cicoria, S Civollani, C Marchetti, P L Guidalotti, C Pettinato, C Nanni, S Fanti
Background: Unilateral condylar hyperplasia (UCH) of the mandible, or Hypercondylia, is a pathological condition that determines an abnormal growth of the affected condyle.Bone SPECT with Tc99m-diphosphonates is a successful tool in the diagnosis of UCH. EANM guidelines also suggest the use of 18F-NaF PET/CT, though it leads to a higher radiation exposure. Aim: As UCH patients are young, we aimed to develop a low dose 18F-Fluoride PET/CT protocol and compare it to a standard injected activity scan, to assess if the image quality remains unchanged...
2018: European journal of hybrid imaging
https://www.readbyqxmd.com/read/29782331/management-challenges-in-an-infant-with-pentalogy-of-cantrell-giant-anterior-encephalocele-and-craniofacial-anomalies-a-case-report
#8
Richard Hubbard, Seth Hayes, Holly Gillis, Spencer Lindsey, Prashant Malhotra, Tariq Wani, Joseph D Tobias, Ralph Beltran
Pentalogy of Cantrell is a rare syndrome consisting of midline abnormalities involving the heart, sternum, abdominal wall, and the anterior and pericardial diaphragm. This combination of defects places patients at particular perioperative risk and requires individualized management during anesthetic care. The following report documents the management of a patient with pentalogy of Cantrell, whose condition was further complicated by severe midline craniofacial abnormalities, including large anterior encephalocele, deficient mandible, tethered tongue, and cleft palate...
May 17, 2018: A&A practice
https://www.readbyqxmd.com/read/29781765/individualized-titanium-mesh-combined-with-platelet-rich-fibrin-and-deproteinized-bovine-bone-a-new-approach-for-challenging-augmentation
#9
Jonas Lorenz, Sarah Al-Maawi, Robert Sader, Shahram Ghanaati
Autologous bone transfer is regarded as the gold standard for ridge augmentation before dental implantation, especially in severe bony defects caused by tumor resection or atrophy. In addition to the advantages of autologous bone, transplantation has several disadvantages, such as secondary operation, increased morbidity and pain. The present study reports, for the first time, a combination of a xenogeneic bone substitute (BO) with platelet-rich fibrin (PRF), which is a fully autologous blood concentrate derived from the patient's own peripheral blood by centrifugation...
May 21, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29781536/resorption-of-the-mandibular-residual-ridge-a-micro-ct-and-histomorphometrical-analysis
#10
Hannah Dekker, Engelbert A J M Schulten, Chris M Ten Bruggenkate, Elisabeth Bloemena, Leo van Ruijven, Nathalie Bravenboer
OBJECTIVES: The aim of this study was to investigate whether the extent of mandibular resorption and gender is related to the bone turnover and microarchitecture of the edentulous mandible. PARTICIPANTS AND METHODS: A mandibular bone sample was obtained at canine position from 36 edentulous participants (50% women; mean age: 65 years) during dental implant surgery. All female participants were postmenopausal. Mandibular height, duration of edentulous state and resorption pattern (Cawood classification) were recorded...
May 21, 2018: Gerodontology
https://www.readbyqxmd.com/read/29781224/influence-of-different-drilling-preparation-on-cortical-bone-a-biomechanical-histological-and-micro-ct-study-on-sheep
#11
Michele Stocchero, Marco Toia, Yohei Jinno, Francesca Cecchinato, Jonas P Becktor, Yoshihito Naito, Anders Halldin, Ryo Jimbo
OBJECTIVE: The aim of this study was to investigate the extent of cortical bone remodeling between two different drilling protocols by means of histomorphometric, µ-CT, and biomechanical analyses. MATERIAL AND METHODS: A total of 48 implants were inserted into the mandible of six sheep following two drilling protocols: Group A (Test, n = 24), undersized preparation; Group B (Control, n = 24), non-undersized preparation. The animals were euthanatized to obtain 5 and 10 weeks of implantation time...
May 20, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29778637/total-mandibulectomy-defect-in-the-setting-of-chronic-bisphosphonate-use
#12
Ameya A Jategaonkar, Arvind K Badhey, Fiyin Sokoya, Sameep Kadakia, Steven Mudrovich, Yadranko Ducic
Bisphosphonates are among several drugs known in modern medicine to have a potentially deleterious effect on the mandible with chronic use. While purportedly causing a necrotic reaction in the bone, the complete mechanism is not fully elucidated yet as cases are quite rare in the general public. Despite the esoteric nature of this entity, patients suffering from bisphosphonate induced necrosis have a complicated and prolonged course often involving varying degrees of mandibular debridement with severe cases requiring reconstruction...
May 16, 2018: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/29776845/ten-year-survival-of-immediate-loading-implants-in-fully-edentulous-mandibles-in-the-japanese-population-a-multilevel-analysis
#13
Kazuhiko Kaneda, Yusuke Kondo, Chihiro Masaki, Taro Mukaibo, Shintaro Tsuka, Akiko Tamura, Fumiko Aonuma, Kouhei Shinmyouzu, Masanori Iwasaki, Toshihiro Ansai, Ryuji Hosokawa
PURPOSE: To evaluate the long-term clinical results of and risk factors for immediate-loading implant treatment of completely edentulous mandibles. METHODS: We retrospectively studied 220 implants in 52 patients who received immediate-loading implants in fully edentulous mandibles. Kaplan-Meier survival analyses, log-rank tests, and multilevel mixed-effects parametric survival analysis was used for statistical analyses. RESULTS: Thirteen of implants in seven patients failed, and the 10-year cumulative implant survival rate was 93...
May 15, 2018: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29773499/study-of-condylar-positional-changes-after-sagittal-split-osteotomy-for-mandibular-advancement-a-prospective-cohort-study
#14
Alberto Costas, Jacinto F Sanromán, Pilar Castro, Martín F Ferro, Annahys Lopez, Bogdan Stavaru
PURPOSE: To analyse the possible morphologic and positional changes of the mandibular condyles after orthognathic surgery. MATERIAL AND METHODS: A prospective cohort study was performed. Patients with mandibular retrognathism were surgically treated to advance the mandible. The study group included seventeen patients (34 condyles) treated with sagittal split osteotomies alone (4 patients) or in combination with maxillary osteotomies (13 patients). Only condyles located on the mandibular side that advance during surgery were studied, therefore only 25 condyles entered this prospective study...
April 22, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29772986/comparing-the-effect-of-preparation-of-the-implant-sites-with-piezosurgery-and-conventional-drilling-on-the-stability-of-implants-at-5-months-follow-up
#15
Sara Soheilifar, Mohsen Bidgoli, Ehsan Houshyar, Maryam Farhadian, Ali Ghamari
The objective of this study was to compare the effects of preparing for implant site osteotomy with conventional drilling or piezosurgery on the stability of oral implants after a 5 month follow-up period. Thirty patients participated in this randomized clinical trial and received two implants in posterior mandible in bone of the same quality. All surgical procedures were performed by the same surgeon. Implant stability amounts were measured by resonance frequency analysis using the Osstell Mentor device and are reported in the format of implant stability quotient (ISQ) values at baseline and 90 and 150 days after surgery...
2018: Journal of Long-term Effects of Medical Implants
https://www.readbyqxmd.com/read/29772035/two-step-immediate-loading-of-mandibular-overdentures-retained-by-mini-implants-a-prospective-clinical-study
#16
Jin-Hong Park, Sang-Wan Shin, Jeong-Yol Leea
PURPOSE: This study aimed to evaluate treatment outcomes of mandibular overdentures retained by two different mini-implant systems with ball attachments under a two-step immediate loading protocol. MATERIALS AND METHODS: This clinical trial investigated treatment outcomes of mandibular mini-implant overdentures in 45 edentulous patients. MDI implants (3M ESPE) and SlimLine implants (Dentium) were randomly selected for placement in the anterior mandible in each group (MDI = 21; SlimLine = 24) with a flapless surgical approach...
May 17, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29772033/passivity-of-fit-of-a-novel-prefabricated-implant-supported-mandibular-full-arch-reconstruction-a-comparative-in-vitro-study
#17
Matthias Karl, Roberto Carretta, Kenji W Higuchi
PURPOSE: To quantify the strain development of a new prefabricated implant-supported mandibular full-arch reconstruction. MATERIALS AND METHODS: Five resin models reflecting edentulous mandibles were each restored with three interforaminal implants and prefabricated frameworks with a novel compensation mechanism, cast frameworks, and computer-aided design/computer-assisted manufacturing (CAD/CAM)-fabricated frameworks. Strains were recorded during superstructure fixation...
May 17, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29771827/the-influence-of-socioeconomic-factors-on-the-epidemiology-of-maxillofacial-fractures-in-southern-italy
#18
Carolina Sbordone, Ida Barca, Marzia Petrocelli, Giovanni Dell'Aversana Orabona, Luigi Angelo Vaira, Walter Colangeli, Maria Giulia Cristofaro, Mario Giudice, Amerigo Giudice, Francesco Maria Cassandro, Federica Attanasi, Giorgio Iaconetta, Luigi Califano
Maxillofacial fractures represent a serious public health problem. Their epidemiology is extremely variable and its analysis is crucial to establish effective treatment and prevention of these injuries. The aim of this multicentric retrospective study was to analyze causes, demographics, incidence, characteristics of 987 patients diagnosed with maxillofacial trauma between 2011 and 2015 at Complex Operative Unit of Maxillofacial Surgery of Federico II University of Naples and Magna Graecia University of Catanzaro, Italy; 657 male and 310 female patients were admitted in the study...
May 15, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29770237/quantitative-measurement-of-peri-implant-bone-defects-using-optical-coherence-tomography
#19
Sulhee Kim, Se-Ryong Kang, Hee-Jung Park, Bome Kim, Tae-Il Kim, Won-Jin Yi
Purpose: The purpose of this study was to visualize and identify peri-implant bone defects in optical coherence tomography (OCT) images and to obtain quantitative measurements of the defect depth. Methods: Dehiscence defects were intentionally formed in porcine mandibles and implants were simultaneously placed without flap elevation. Only the threads of the fixture could be seen at the bone defect site in the OCT images, so the depth of the peri-implant bone defect could be measured through the length of the visible threads...
April 2018: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/29769591/clinical-retrospective-case-control-study-on-the-mechanics-of-obstacle-in-mouth-opening-and-malocclusion-in-patients-with-maxillofacial-fractures
#20
Hai-Hua Zhou, Kun Lv, Rong-Tao Yang, Zhi Li, Xue-Wen Yang, Zu-Bing Li
This study aims to identify and distinguish various factors that may influence the clinical symptoms (limited mouth opening and malocclusion) in patients with maxillofacial fractures. From January 2000 to December 2009, 963 patients with maxillofacial fractures were enrolled in this statistical study to aid in evaluating the association between various risk factors and clinical symptoms. Patients with fractured posterior mandibles tended to experience serious limitation in mouth opening. Patients who sustained coronoid fractures have the highest risk of serious limitation in mouth opening (OR = 9...
May 16, 2018: Scientific Reports
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