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Mandibular fracture

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https://www.readbyqxmd.com/read/28645670/fracture-resistance-of-cad-cam-monolithic-ceramic-and-veneered-zirconia-molar-crowns-after-aging-in-a-mastication-simulator
#1
Merve Bankoğlu Güngör, Secil Karakoca Nemli
STATEMENT OF PROBLEM: The demand for ceramic restorations has increased over the past years, and now various machinable materials can be used for chairside computer-aided design and computer aided manufacturing (CAD-CAM) systems. Limited studies of these new materials make it difficult to evaluate their mechanical performance, advantages, and limitations. PURPOSE: The purpose of this in vitro study was to investigate the fracture resistance of CAD-CAM monolithic ceramic and veneered zirconia molar crowns after thermomechanical aging...
June 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28643542/long-term-stability-of-splinted-anterior-mandibular-teeth-during-supportive-periodontal-therapy
#2
Sarah K Sonnenschein, Carlota Betzler, Maurice A Rütters, Johannes Krisam, Daniel Saure, Ti-Sun Kim
OBJECTIVE: The aim of the study was to retrospectively assess the survival rate and stability of periodontally compromised and mobile anterior mandibular teeth after splinting in patients under supportive periodontal therapy (SPT). MATERIALS AND METHODS: Thirty-nine patients with splinted anterior mandibular teeth and SPT (≥1 visit/year) for 3-15 years were re-examined. Periodontal status, patient and tooth-related factors were assessed retrospectively before (baseline) and 3 years after splinting (n = 39 patients, 162 splinted teeth)...
June 23, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642189/how-to-produce-pre-shaped-rigid-arch-bars-using-low-cost-3d-printing-technology-a-technical-note
#3
Charles Druelle, Sandrine Touzet-Roumazeille, Gwénaël Raoul, Joël Ferri, Romain Nicot
Numerous oral and maxillofacial procedures in dentate patients begin with the fixation of occlusions. While several techniques exist to perform mandibulo-maxillary fixation, many surgeons use arch bars in common practice. In cases of severe craniofacial traumas or jaw malformations, such as temporomandibular joint ankylosis, it may be impossible to use rigid arch bars. This technical note reports on the development of a technique to produce pre-shaped rigid arch bars using 3D printing technology. We take the case of a patient who presents Le Fort 1, Le Fort 2 and Le Fort 3 fractures as well as a central palatine disjunction, an angular mandibular fracture and bilateral zygomatic fractures...
June 19, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28638348/the-redox-balance-in-erythrocytes-plasma-and-periosteum-of-patients-with-titanium-fixation-of-the-jaw
#4
Jan Borys, Mateusz Maciejczyk, Adam J Krȩtowski, Bozena Antonowicz, Wioletta Ratajczak-Wrona, Ewa Jabłońska, Piotr Załęski, Danuta Waszkiel, Jerzy R Ładny, Piotr Żukowski, Anna Zalewska
Titanium miniplates and screws are commonly used for fixation of jaw fractured or osteotomies. Despite the opinion of their biocompatibility, in clinical practice symptoms of chronic inflammation around the fixation develop in some patients, even many years after the application of miniplates and screws. The cause of these complications is still an unanswered question. Taking into account that oxidative stress is one of the toxic action of titanium, we have evaluated the antioxidant barrier as well as oxidative stress in the erythrocytes, plasma and periosteum covering the titanium fixation of the jaw...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28630773/functional-treatment-of-a-child-with-extracapsular-mandibular-fracture
#5
Diana Cassi, Marisabel Magnifico, Chiara Di Blasio, Mauro Gandolfini, Alberto Di Blasio
Condylar fractures are among the most frequent fractures in the context of traumatic lesions of the face. The management of condylar fractures is still controversial, especially when fractures occur in children: if overlooked or inappropriately treated, these lesions may lead to severe sequelae, both cosmetic and functional. The therapy must be careful because severe long-term complications can occur. In this case report, the authors present a case of mandibular fracture in which the decision between surgical therapy and functional therapeutic regimen may be controversial due to the particular anatomy of the fracture line and the age of the patient...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28624238/non-imf-mandibular-fracture-reduction-techniques-a-review-of-the-literature
#6
Enkh-Orchlon Batbayar, Baucke van Minnen, Ruud R M Bos
BACKGROUND: Intermaxillary fixation (IMF) techniques are commonly used in mandibular fracture treatment to reduce bone fragments and re-establish normal occlusion. However, non-IMF reduction techniques such as repositioning forceps may be preferable due to their quick yet adequate reduction. The purpose of this paper is to assess which non-IMF reduction techniques and reduction forceps are available for fracture reduction in the mandible. METHODS: A systematic search was performed in the databases of Pubmed and EMBASE...
May 24, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28623685/two-stage-ridge-split-at-narrow-alveolar-mandibular-bone-ridges
#7
Ivo Agabiti, Daniele Botticelli
PURPOSE: When the bone ridge is corticalized, the displacement of the buccal plate may result in an unintentional malfracture. The aim of this study was to report the results of a 2-stage atrophic alveolar ridge expansion performed with a sonic-air surgical instrument. MATERIALS AND METHODS: In this retrospective cohort study, the atrophic distal segments of the mandible were treated by a split-thickness flap approach and application of an alveolar ridge expansion performed in 2 surgical phases...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28621279/comparative-evaluation-of-stress-developed-on-rotary-retreatment-instruments-during-retrieval-of-gutta-percha
#8
Dhanasekaran Sihivahanan, T Vinay Kumar Reddy, Anchu Rachel Thomas, Natarajan Senthilnathan, Murali Sivakumar, Sushmita Shivanna
AIM: The aim of the study is to compare the maximum stress distribution on the rotary retreatment instruments within the root canal at cervical, middle, and the apical one-third during retreatment of gutta-percha. MATERIALS AND METHODS: A human mandibular premolar was scanned, and three-dimensional geometry of the root was reconstructed using finite element analysis (FEA) software package (ANSYS). The basic model was kept unchanged; tooth models were created using the same dimensions and divided into two groups as follows: Group I: ProTaper Universal retreatment system and group II: Mtwo rotary retreatment system...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28610821/superolateral-dislocation-of-the-intact-mandibular-condyle-report-of-a-rare-case-with-a-review
#9
N Srinath, D N Umashankar, C Naik, J Biradar
Dislocation of the temporomandibular joint, which represents 3% of all dislocated joints reported in the body, occurs when the mandibular condyle is displaced anteriorly beyond the articular eminence. Although anterior dislocation of the mandibular condyle is well documented in the literature, superior, lateral, and posterior dislocation of the condyle is rare. Only a few reports documenting superolateral dislocation with anterior mandible fractures have been published in the past. However such dislocations without any associated fractures are even rarer...
June 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28608261/comparison-of-a-2-0-mm-locking-system-with-conventional-2-0-and-2-4-mm-systems-in-the-treatment-of-mandibular-fractures-a-randomized-controlled-trial
#10
Rubens Camino Junior, Rogério Bonfante Moraes, Constantin Landes, João Gualberto C Luz
PURPOSE: A comparative study of the use of the 2.0-mm locking fixation system with conventional systems in the treatment of mandibular fractures was performed. METHODS: For this study, 87 consecutive patients with 112 mandibular fractures were randomized to receive either 2.0-mm locking plates (n = 45) or conventional 2.0- or 2.4-mm plates (n = 42) and had a minimum follow-up of 6 months. Fractures were classified based on the degree of displacement and complexity...
June 12, 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28595841/an-atypical-variant-of-superolateral-dislocation-of-the-mandibular-condyle-a-case-report
#11
Kapil Malik, Subhas C Debnath, Apurba K Adhyapok, Kriti Hazarika
Dislocation of the mandibular condyle from the glenoid fossa can occur in anterior, posterior, lateral, and superior directions. Posterior, lateral, and superior dislocations are rare. Superolateral dislocation is seldom encountered in clinical practice. It is generally associated with fracture of the anterior or contralateral side of the mandible. The occurrence of superolateral dislocation of the condyle hooked above the zygomatic arch with an associated fracture of the medial pole of the condyle is rare and has been reported only once in the literature...
May 15, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28591339/oral-motor-and-electromyographic-characterization-of-adults-with-facial-fractures-a-comparison-between-different-fracture-severities
#12
Amanda Pagliotto da Silva, Fernanda Chiarion Sassi, Endrigo Bastos, Nivaldo Alonso, Claudia Regina Furquim de Andrade
OBJECTIVES: To characterize the oral motor system of adults with facial injuries and to compare the oral motor performance/function between two different groups. METHODS: An observational, descriptive, cross-sectional study was conducted in 38 patients presenting with facial trauma who were assigned to the Division of Orofacial Myology of a Brazilian School Hospital. Patients were divided into two groups: Group 1 (G1) consisted of 19 patients who were submitted to open reduction of at least one facial fracture, and Group 2 (G2) consisted of 19 individuals who were submitted to closed fracture reduction with maxillomandibular fixation...
May 2017: Clinics
https://www.readbyqxmd.com/read/28582298/flail-mandible-and-immediate-airway-management-traumatic-detachment-of-mandibular-lingual-cortex-results-in-obstructive-dyspnea-and-severe-odynophagia
#13
Ioannis Papadiochos, Lampros Goutzanis, Vasileios Petsinis
Isolated mandibular fractures usually represent themselves as non-life-threatening injuries and are not treated in emergency setting. However, some rare patterns of them may result in airway obstruction as a result of displacement of bony fragments. The authors report a patient of an open comminuted fracture of mandibular symphysis which exhibited an uncommon split pattern with retrogression of lingual cortical plate, and thereby induced glossoptosis, painful deglutition, and obstruction of the upper airway within a few hours...
June 2, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28578891/autotransplantation-of-mandibular-third-molar-with-buccal-cortical-plate-to-replace-vertically-fractured-mandibular-second%C3%A2-molar-a-novel-technique
#14
Juan Zufía, Francesc Abella, Ivan Trebol, Ramón Gómez-Meda
Tooth replacement often leads to inadequate vertical volume in the recipient site bone when a tooth has been extracted because of a vertical root fracture (VRF). This case report presents the autotransplantation of a mandibular third molar (tooth #32) with the attached buccal cortical plate to replace a mandibular second molar (tooth #31) diagnosed with a VRF. After extraction of tooth #31, the recipient socket was prepared based on the size measured in advance with cone-beam computed tomographic imaging. The precise and calculated osteotomy of the cortical bone of tooth #32 allowed for the exact placement of the donor tooth in the position of tooth #31...
June 1, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28577367/occurence-of-dentinal-defects-after-root-canal-preparation-with-r-phase-m-wire-and-gold-wire-instruments-a-micro-ct-analysis
#15
Marcely Cassimiro, Kaline Romeiro, Luciana Gominho, Andressa de Almeida, Larissa Costa, Diana Albuquerque
BACKGROUND: This study aims to evaluate the frequency of dentinal defects after root canal preparation with the ProTaper NEXT, K3XF and WaveOne GOLD systems using microcomputed tomography. METHODS: Sixty permanent mandibular incisors with a single canal were selected. Inspection of the teeth was performed under a stereomicroscope (15x) to observe the presence of pre-existing cracks and fractures lines. Samples were divided into three experimental groups (n = 20): ProTaper NEXT (PTN), K3XF (K3XF) and WaveOne GOLD (WOG)...
June 2, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28576461/osteomyelitis-of-the-jaw-with-pathological-fracture-following-extraction-of-an-impacted-wisdom-tooth-a-case-report
#16
B González-Navarro, C Arranz-Obispo, R Albuquerque, E Jané-Salas, J López-López
Osteomyelitis is an infection and inflammation associated with the bone structures: bone marrow, cortical bone, periosteum, blood vessels and nerves. Although it does not have a frequent presentation, it can sometimes lead to complications such as pathological fractures or even septicemia. We present a clinical case study, to assess the relationship between osteomyelitis of the jaw and pathological fractures, after the extraction of an impacted wisdom tooth. This case highlights a rare complication following the surgical removal of mandibular third molar; a slow evolution of the pathology following an extraction should lead to close monitoring of the patient both clinically and radiographically, albeit osteomyelitis is a rare complication, it should be included as one of the differential diagnosis of persistent post-extraction pain...
May 30, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28576125/dissection-of-the-internal-carotid-artery-and-stroke-after-mandibular-fractures-a-case-report-and-review-of-the-literature
#17
Ingrid Aune Tveita, Martin Ragnar Skjerve Madsen, Erik Waage Nielsen
BACKGROUND: We present a report of a patient with blunt trauma and mandibular fractures who developed a significant cerebral infarction due to an initially unrecognized injury of her left internal carotid artery. We believe that increased knowledge of this association will facilitate early recognition and hence prevention of a devastating outcome. CASE PRESENTATION: A 41-year-old ethnic Norwegian woman presented to our Emergency Room after a bicycle accident that had caused a direct blow to her chin...
June 2, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28571261/effect-of-different-ferrule-length-on-fracture-resistance-of-endodontically-treated-teeth-an-in-vitro-study
#18
Sushil Kar, Arvind Tripathi, Chavi Trivedi
INTRODUCTION: A ferrule has been described as a key element of tooth preparation when using a post and a core. It is a vertical band of tooth structure at the gingival aspect of crown preparation. It lessens the stress transmission to the root which is due to forces from posts or bending during seating of the post. The incorporation of a ferrule can help to withstand the forces of occlusion, preserve the hermetic seal of the luting cement, and minimize the concentration of stresses at the junction of post and core...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28571249/effectiveness-of-various-endodontic-irrigants-on-the-micro-hardness-of-the-root-canal-dentin-an-in-vitro-study
#19
Suparna Ganguly Saha, Vini Sharma, Anuj Bharadwaj, Poorvi Shrivastava, Mainak Kanti Saha, Sandeep Dubey, Shubham Kala, Shubhra Gupta
INTRODUCTION: Irrigating solutions used for the elimination of micro-organisms during root canal preparation may affect the chemical and the physical properties of dentin thereby rendering the tooth more susceptible to fracture. Therefore careful and judicious selection of irrigant is required which have maximum benefits with minimum undesirable properties. AIM: The aim of the present study was to evaluate the effect of various endodontic irrigants on the micro-hardness of the root canal dentin...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28570407/a-modified-external-fixator-system-in-treatment-of-mandibular-condylar-fractures
#20
Piero Cascone, Fabrizio Spallaccia, Paolo Arangio, Valentino Vellone, Matteo Gualtieri
The purpose of this study is to evaluate patient's outcomes after condylar fractures treated with the modified external fixation system from 2008 to 2012.A group of 58 patients with unilateral and bilateral fractures of mandibular condyle was admitted in the authors' study.The final sample included a total of 44 patients, 24 males (54.6%) and 20 females (45.4%).The remaining 14 (24%) patients were excluded because they did not fulfill all the criteria requested.After 12 months from surgery, the functional-clinical evaluation of mouth's maximum opening and mostly extent of lateral excursion and of protrusion showed the following results: 8% of the sample showed a maximum mouth opening <30 mm, 72% of the sample showed a maximum mouth opening between 30 and 40 mm, 20% of the sample showed a maximum mouth opening >40 mm lateral excursion (contralateral to fracture) and protrusion was respectively of 9...
May 31, 2017: Journal of Craniofacial Surgery
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