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Maxillary fractures

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https://www.readbyqxmd.com/read/28340303/epidemiology-and-patterns-of-facial-fractures-due-to-road-traffic-accidents-in-taiwan-a-15%C3%A2-years-retrospective-study
#1
Cheng-San Yang, Solomon Chih-Cheng Chen, Yung-Cheng Yang, Li-Chung Huang, How-Ran Guo, Hsin-Yi Yang
OBJECTIVE: The facial region is a commonly fractured site, but the etiology varies widely by country and geographic region. To date, there are no population-based studies of facial fractures in Taiwan. METHODS: We conducted a retrospective study of patients diagnosed with facial fracture and registered in the National Health Insurance Research Database of Taiwan between 1997 and 2011. The epidemiological characteristics of this cohort were analyzed, including the etiology, fracture site, associated injuries, and sex and age distributions...
March 24, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28333370/influence-of-nickel-titanium-rotary-systems-with-varying-tapers-on-the-biomechanical-behaviour-of-maxillary-first-premolars-under-occlusal-forces-a-finite-element-analysis-study
#2
S Askerbeyli Ors, A Serper
AIM: To evaluate the effect of three nickel-titanium (Ni-Ti) rotary systems with varying tapers on stress distribution and to analyse potential fracture patterns as well as the volume of fracture-susceptible regions in two-rooted maxillary premolars. METHODOLOGY: The root canals of three single-rooted premolars were prepared with either HeroShaper (Micro-Mega, Besançon, France) to (size 30, .04 taper), Revo-S (Micro-Mega) to AS30 (size 30, .06 taper) or ProTaper Universal (Dentsply Maillefer, Ballaigeus, Switzerland) to F3 (size 30, ...
March 23, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28296061/influence-of-continuous-use-of-a-vacuum-forming-machine-for-mouthguard-thickness-after-thermoforming
#3
Mutsumi Takahashi, Yoshiaki Araie, Yoshihide Satoh, Shin-Ichi Iwasaki
Mouthguards can reduce the risk of sports-related injuries such as tooth fracture or avulsion, but the sheet material and thickness have a large effect on their efficacy and safety. The aim of this study was to investigate the effect of the continuous use of a vacuum-forming machine on mouthguard thickness MATERIALS AND METHODS: Ethylene vinyl acetate sheets and olefin copolymer sheets were used for thermoforming with a vacuum-forming machine. The working model was trimmed to a height of 23 mm at the maxillary central incisor and 20 mm at maxillary first molar...
March 15, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28294978/discriminative-features-in-three-autosomal-recessive-cutis-laxa-syndromes-cutis-laxa-iia-cutis-laxa-iib-and-geroderma-osteoplastica
#4
REVIEW
Ariana Kariminejad, Fariba Afroozan, Bita Bozorgmehr, Alireza Ghanadan, Susan Akbaroghli, Hamid Reza Khorram Khorshid, Faezeh Mojahedi, Aria Setoodeh, Abigail Loh, Yu Xuan Tan, Nathalie Escande-Beillard, Fransiska Malfait, Bruno Reversade, Thatjana Gardeitchik, Eva Morava
Cutis laxa is a heterogeneous condition characterized by redundant, sagging, inelastic, and wrinkled skin. The inherited forms of this disease are rare and can have autosomal dominant, autosomal recessive, or X-linked inheritance. Three of the autosomal recessive cutis laxa syndromes, namely cutis laxa IIA (ARCL2A), cutis laxa IIB (ARCL2B), and geroderma osteodysplastica (GO), have very similar clinical features, complicating accurate diagnosis. Individuals with these conditions often present with cutis laxa, progeroid features, and hyperextensible joints...
March 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28291687/structural-biomechanics-of-the-craniomaxillofacial-skeleton-under-maximal-masticatory-loading-inferences-and-critical-analysis-based-on-a-validated-computational-model
#5
Amir R Pakdel, Cari M Whyne, Jeffrey A Fialkov
BACKGROUND: The trend towards optimizing stabilization of the craniomaxillofacial skeleton (CMFS) with the minimum amount of fixation required to achieve union, and away from maximizing rigidity, requires a quantitative understanding of craniomaxillofacial biomechanics. This study uses computational modeling to quantify the structural biomechanics of the CMFS under maximal physiologic masticatory loading. METHODS: Using an experimentally validated subject-specific finite element (FE) model of the CMFS, the patterns of stress and strain distribution as a result of physiological masticatory loading were calculated...
February 17, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28288297/early-rehabilitation-of-incisors-with-dentinogenesis-imperfecta-type-ii-case-report
#6
Ana Paula Ca Beltrame, Maíra Mery Rosa, Ricardo At Noschang, Izabel Cs Almeida
Dentinogenesis imperfecta is an phenotypic alteration in the formation of the organic matrix. It causes the rapid and progressive wear of tooth structure, which may compromise tooth function and aesthetics. This is a case of a 1y, 8m-old child with dentinogenesis imperfecta. All teeth presented with an opalescent appearance and grayish color hue. Compromised structural integrity was noted as excessive wear and fracturing of the enamel from the dentin layer. With low doses of midazolam (oral) and chloral hydrate (rectal) administration, in a hospital environment, sedation was used to aid full mouth rehabilitation...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28283757/concept-of-patient-specific-shape-memory-implants-for-the-treatment-of-orbital-floor-fractures
#7
Ronny Grunert, Maximilian Wagner, Christian Rotsch, Harald Essig, Susanna Posern, Friedemann Pabst, Welf-Guntram Drossel, Juergen Lichtenstein
PURPOSE: We will aim to develop implants made of a Ni-Ti shape memory alloy which can be applied for the treatment of midface fractures, such as isolated orbital floor fractures. These can then be implanted in a compressed form and unfold automatically in the body. With the help of newly developed application instruments, the implants can be applied along transnasal and transantral approaches into the maxillary sinus. Our objective is to evaluate the operation process and the functionality of these implants, already in a pre-investigation by an experienced surgeon on a phantom...
March 10, 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28274076/physiological-root-end-closure-in-a-traumatized-young-permanent-tooth-using-collagen-particles-as-pulpal-dressing
#8
V Krishnapriya, Divya Gaur, Ch Santosh Kumar, G Shilpa
The management of traumatized young permanent teeth has always been a challenge to the clinician, considering the importance of retaining the vitality of the tooth. Recently, collagen particles have been successfully used as pulpotomy medicaments in primary teeth. This case report shows the use of collagen particles as pulpal dressing in a traumatized young permanent tooth of a nine-year-old child presenting with complicated fracture of young permanent left maxillary central incisor. Partial pulpotomy was performed with collagen particles (Biofil-AB) as pulpal dressing...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28256273/direct-resin-composite-restorations-for-fractured-maxillary-teeth-and-diastema-closure-a-7-years-retrospective-evaluation-of-survival-and-influencing-factors
#9
Edina Lempel, Bálint Viktor Lovász, Réka Meszarics, Sára Jeges, Ákos Tóth, József Szalma
OBJECTIVES: This retrospective study evaluated the survival rate of anterior direct resin based composite (RBC) build-ups in vital teeth made of microhybrid and nanofill RBC materials and the influence of bruxism, beverage consumption and smoking on the long-term performance of restorations. METHODS: Patients receiving anterior restoration between 2006 and 2011, with the diagnosis of fracture or diastema, were selected. A total of 65 adult patients (mean age: 25...
February 27, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28243388/comparison-of-the-fracture-resistances-of-glass-fiber-mesh-and-metal-mesh-reinforced-maxillary-complete-denture-under-dynamic-fatigue-loading
#10
So-Min Im, Yoon-Hyuk Huh, Lee-Ra Cho, Chan-Jin Park
PURPOSE: The aim of this study was to investigate the effect of reinforcing materials on the fracture resistances of glass fiber mesh- and Cr-Co metal mesh-reinforced maxillary complete dentures under fatigue loading. MATERIALS AND METHODS: Glass fiber mesh- and Cr-Co mesh-reinforced maxillary complete dentures were fabricated using silicone molds and acrylic resin. A control group was prepared with no reinforcement (n = 15 per group). After fatigue loading was applied using a chewing simulator, fracture resistance was measured by a universal testing machine...
February 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28222867/prosthodontic-treatment-of-a-retrognathic-edentulous-maxilla-demonstrating-limited-interarch-distance-3-5-year-results-with-fixed-and-removable-implant-prostheses
#11
Won-Suk Oh, Furat George, Ju-Mi Park
The prosthodontic treatment of patients with a retrognathic edentulous maxilla should consider the restoration of the lower facial profile and access for oral hygiene. This clinical report describes prosthodontic treatments of a patient with edentulism who presented with repeated fractures of the denture teeth of a maxillary implant-supported complete fixed dental prosthesis (ICFDP) and a mandibular implant-supported overdenture. Considerable plaque accumulation was noted on the ICFDP, which was replaced with an open palatal design implant-supported overdenture...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28205326/an-innovative-method-for-fragment-reattachment-after-complicated-crown-fracture
#12
Riccardo Tonini
The case of a nineteen-year-old female with atypical fractures to three maxillary incisors (#11 FDI, #8 universal; #21 FDI, #9 universal and #22 FDI, #10 universal) with one showing a complicated crown fracture and pulp exposure is reported. A partial pulpotomy had been carried out immediately after trauma and the patient complained of acute pain on percussion of the left central incisor. Direct restoration with resin-based composite was carried out on the two teeth where fragments were not available (tooth #8 and #10) and root canal treatment with reattachment of fragments and fiber post was carried out on the third (tooth #9)...
February 16, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28196166/direct-resin-composite-restoration-of-maxillary-central-incisors-with-fractured-tooth-fragment-reattachment-case-report
#13
Monika Szmidt, Maciej Górski, Katarzyna Barczak, Jadwiga Buczkowska-Radlińska
This article presents a clinical protocol to reconstruct two accidentally damaged maxillary central incisors using composite resin material and a fractured tooth component. A patient was referred to the clinic with fracture of the two maxillary central incisors. Clinical examination revealed that both teeth were fractured in the middle third of the crown and that the fractures involved enamel and dentin with no pulp exposure. The patient had also suffered a lower lip laceration. When the lip was evaluated, a fractured fragment of the maxillary right central incisor was found inside the wound...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28195897/base-of-skull-blocks-for-open-reduction-and-internal-fixation-of-faciomaxillary-fractures
#14
Sandeep Mehrotra, Sunil Anand
INTRODUCTION: Faciomaxillary fractures (FMF) occur in a significant proportion of trauma patients. Nearly all polytrauma patients and even those with isolated FMF are managed under general anesthesia for definitive management. We propose the use of regional nerve blocks as a safe and effective means for open reduction and fixation of isolated FMF. AIM AND OBJECTIVES: The aim is to evaluate the feasibility, effectiveness and safety of base of skull maxillomandibular and distal trigeminal nerve blocks in the management of FMF...
February 14, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28169905/reconstruction-of-large-orbital-posterior-floor-wall-fracture-considering-orbital-floor-slope-using-endoscope
#15
Jinhwan Park, Jungah Huh, Joonsik Lee, Minwook Chang, Hwa Lee, Minsoo Park, Sehyun Baek
PURPOSE: Reconstruction of a large orbital fracture extending to the posterior wall of the maxillary sinus is difficult and challenging. In this study, the authors present transconjunctival or transcaruncular approach using endoscopy and layered porous polyethylene barrier sheets to manage large orbital floor wall fracture. METHODS: A retrospective review of all patients who underwent reconstruction of large orbital floor wall fractures between June 2009 and July 2015 was conducted...
February 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28163520/penetrating-anterior-skull-base-fracture-inflicted-by-a-cow-s-horn
#16
Adomas Bunevicius, Karolis Bareikis, Laimutis Kalasauskas, Arimantas Tamasauskas
Farm workers are at increased risk for animal-inflicted head injuries that are associated with significant morbidity and occasionally may be fatal. These injuries may cause permanent eye damage with or without concomitant skull base fracture. Here, we present a male farmer who suffered a cow attack that resulted in perforating orbital injury with comminuted frontobasal cranial fracture caused by a cow's horn. The next day, the patient developed nasal and orbital cerebrospinal fluid (CSF) leak. Computed Tomography cisternography revealed CSF leakage to frontal and maxillary sinuses...
December 2016: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/28113131/effect-of-root-morphology-on-the-susceptibility-of-endodontically-treated-teeth-to-vertical-root-fracture-an-ex-vivo-model
#17
Raphael Pilo, Zvi Metzger, Tamar Brosh
Vertical root fracture (VRF) of endodontically treated teeth is relatively common, and the involved teeth have a poor prognosis. Previous destructive methodologies applied force to the root in an uneven manner; thus, the associated experiments could not truly assess the mechanical behavior of VRF. This problem was resolved in the current study via the novel application of a bursting pressure methodology to endodontically treated maxillary central incisors and premolars. Hydrostatic pressure was applied inside the root canal through a cannula bonded to the coronal access cavity, and the apical foramen was sealed...
January 12, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28111383/fracture-strength-of-cad-cam-fabricated-lithium-disilicate-and-resin-nano-ceramic-restorations-used-for-endodontically-treated-teeth
#18
Merve Bankoğlu Güngör, Bilge Turhan Bal, Handan Yilmaz, Cemal Aydin, Seçil Karakoca Nemli
The purpose of the present study was to evaluate and compare the fracture strength and failure modes of endocrowns, zirconia post, and fiber post supported restorations and predict the clinical outcomes of six different prostheses used for endodontically treated teeth. Sixty (n=10) maxillary central incisors were restored with zirconia post/resin-nano-ceramic crown (ZrRNC), fiber post/resinnano-ceramic crown (FbRNC), zirconia post/lithium disilicate ceramic crown (ZrLDS), fiber post/lithium disilicate ceramic crown (FbLDS), resin-nano-ceramic endocrown (EndoRNC), and lithium disilicate ceramic endocrown (EndoLDS)...
January 20, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28111135/fracture-resistance-of-glazed-full-contour-zls-incisor-crowns
#19
Franz Sebastian Schwindling, Stefan Rues, Marc Schmitter
PURPOSE: To compare the failure behaviour of zirconia-reinforced lithium silicate (Celtra Duo, DeguDent) with that of lithium disilicate (IPS e.max CAD, Ivoclar Vivadent) and feldspar (Mark II, VITA) ceramics. METHODS: Three groups of sixteen glazed maxillary incisor crowns were produced. The inner surfaces of the crowns were etched, then luted to metal dies with self-adhesive cement. Single load-to-failure tests were performed before and after thermo-mechanical ageing...
January 19, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28106705/repair-of-orbital-floor-fracture-with-modified-transnasal-endoscopic-approach-through-anterior-space-to-nasolacrimal-duct
#20
Motohiko Suzuki, Yoshihisa Nakamura, Shinya Ozaki, Makoto Yokota, Shingo Murakami
OBJECTIVES: Endoscopic approach provides excellent magnification and visualization, and a purely transnasal approach is minimally invasive method. However, it is very difficult to repair anterior and lateral fractures with the previous transnasal endoscopic approaches, since repair of orbital fractures is managed through the middle meatus and ostium from the posterior side of the nasolacrimal duct with side-viewing endoscope and curved instruments. Therefore, the authors used modified transnasal endoscopic approach as an alternative for repair of orbital floor fractures in order to effectively reach the lateral or anterior fracture of the orbital floor with straight endoscope and instruments endoscopically...
January 18, 2017: Journal of Craniofacial Surgery
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