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Mandibular fractures

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https://www.readbyqxmd.com/read/29148912/influence-of-different-restoration-techniques-on-fracture-resistance-of-root-filled-teeth-in-vitro-investigation
#1
M E Hshad, E E Dalkılıç, G C Ozturk, I Dogruer, F Koray
OBJECTIVE: The purpose of this study was to determine the fracture strength of endodontically treated mandibular premolar teeth restored with composites and different reinforcement techniques. METHODS AND MATERIALS: Forty-eight freshly extracted human mandibular premolar teeth were randomly divided into four groups: group IN, group CR, group FRC, and group PRF. Group IN consisted of teeth with intact crowns and served as the control group. In the other three groups, endodontic treatment was performed and standard mesio-occluso-distal (MOD) cavities were prepared...
November 17, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29142872/isolated-tympanic-plate-fracture-detected-by-cone-beam-computed-tomography-report-of-four-cases-with-review-of-literature
#2
Ashita Ritesh Kalaskar, Ritesh Kalaskar
The tympanic plate is a small part of the temporal bone that separates the mandibular condyle from the external auditory canal. Fracture of this small plate is rare and usually associated with other bony fractures, mainly temporal and mandibular bone. There is a limited amount of literature on this subject, which increases the chance of cases being overlooked by physicians and radiologists. This is further supported by purely isolated cases of tympanic plate fracture without evidence of other bony fractures...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29142870/intracorporeal-reduction-of-condylar-fracture-using-both-pedicled-condylar-and-seperated-ramal-fragments-after-vertical-ramal-osteotomy
#3
Il-Kyu Kim, Jun-Min Jang, Hyun-Young Cho, Ji-Hoon Seo, Dong-Hwan Lee
The aim of this study is to introduce a surgical technique that can maintain blood supply to prevent condylar resorption in the extracorporeal reduction of condylar fracture. Neither the medial pterygoid muscle on the ramal bone nor the lateral pterygoid muscle on the condylar fragment was detached after vertical ramal osteotomy. Thus, reduction was performed in the intracorporeal state. Therefore, blood supply was expected to be maintained to the fragments of both the condylar and ramal bones. On postoperative radiographs, the anatomical outline of the fractured condyle was well restored, and the occlusion was stable...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29142868/protrusive-maxillomandibular-fixation-for-intracapsular-condylar-fracture-a-report-of-two-cases
#4
Yeong Kon Jeong, Won-Jong Park, Il Kyung Park, Gi Tae Kim, Eun Joo Choi
Clinical limitations following closed reduction of an intracapsular condylar fracture include a decrease in maximum mouth opening, reduced range of mandibular movements such as protrusion/lateral excursion, and reduced occlusal stability. Anteromedial and inferior displacement of the medial condyle fragment by traction of the lateral pterygoid muscle can induce bone overgrowth due to distraction osteogenesis between the medial and lateral condylar fragments, causing structural changes in the condyle. In addition, when conventional maxillomandibular fixation (MMF) is performed, persistent interdental contact sustains masticatory muscle hyperactivity, leading to a decreased vertical dimension and premature contact of the posterior teeth...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29142639/effect-of-ferrule-on-the-fracture-resistance-of-mandibular-premolars-with-prefabricated-posts-and-cores
#5
Ae-Ra Kim, Hyun-Pil Lim, Hong-So Yang, Sang-Won Park
PURPOSE: This study evaluated fracture resistance with regard to ferrule lengths and post reinforcement on endodontically treated mandibular premolars incorporating a prefabricated post and resin core. MATERIALS AND METHODS: One hundred extracted mandibular premolars were randomly divided into 5 groups (n=20): intact teeth (NR); endodontically treated teeth (ETT) without post (NP); ETT restored with a prefabricated post with ferrule lengths of either 0 mm (F0), 1 mm (F1), or 2 mm (F2)...
October 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29141673/a-customized-fixation-plate-with-novel-structure-designed-by-topological-optimization-for-mandibular-angle-fracture-based-on-finite-element-analysis
#6
Yun-Feng Liu, Ying-Ying Fan, Xian-Feng Jiang, Dale A Baur
BACKGROUND: The purpose of this study was to design a customized fixation plate for mandibular angle fracture using topological optimization based on the biomechanical properties of the two conventional fixation systems, and compare the results of stress, strain and displacement distributions calculated by finite element analysis (FEA). METHODS: A three-dimensional (3D) virtual mandible was reconstructed from CT images with a mimic angle fracture and a 1 mm gap between two bone segments, and then a FEA model, including volume mesh with inhomogeneous bone material properties, three loading conditions and constraints (muscles and condyles), was created to design a customized plate using topological optimization method, then the shape of the plate was referenced from the stress concentrated area on an initial part created from thickened bone surface for optimal calculation, and then the plate was formulated as "V" pattern according to dimensions of standard mini-plate finally...
November 15, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29140379/seven-year-follow-up-of-full-arch-prostheses-supported-by-four-implants-a-prospective-study
#7
Karen Vaz Ayub, Eduardo Antônio Ayub, Accácio Lins do Valle, Gerson Bonfante, Thiago Pegoraro, Luiz Fernando
PURPOSE: To evaluate biologic and prosthetic outcomes of implant-supported mandibular full-arch fixed prostheses treated with the All-on-4 treatment concept after 7 years. MATERIALS AND METHODS: Patients were selected to receive full-arch fixed immediate prostheses supported by four implants up to 72 hours after surgery. The following biologic aspects were evaluated: Plaque Index (PI) and Bleeding Index (BI), implant stability by resonance frequency, and marginal bone loss (MBL) measured with the aid of periapical radiographs...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29133198/study-of-the-mechanical-reliability-of-an-s-shaped-adjustable-osteosynthesis-plate-for-bilateral-sagittal-split-osteotomies-study-on-15-consecutive-cases
#8
Alexis Veyssiere, Nicols Leprovost, Béatrice Ambroise, Raphaelle Prévost, Anne Chatellier, Hervé Bénateau
INTRODUCTION: The main challenge during the osteosynthesis of a bilateral sagittal split osteotomy (BSSO) is to take into account the correct position of the condyle. Adjustable plates can be used to fine-tune the final occlusion without changing the osteosynthesis. A new type of adjustable plate is presented in this article. The aim is to assess the mechanical reliability of this system during the surgery and during the healing period, thanks to a preliminary prospective on 15 consecutive cases...
November 10, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29123991/the-use-of-synthes-matrixwave-bone-anchored-arch-bars-for-closed-treatment-of-multiple-concurrent-mandibular-fractures
#9
Elizabeth Kiwanuka, Rajiv Iyengar, Charles Christopher Jehle, Raman Mehrzad, Daniel Kwan
Background: Maxillomandibular fixation (MMF) is an important tool in the treatment of facial fractures and bone-anchored arch bar systems have emerged as treatment options. This study illustrates our experience with the Synthes MatrixWAVE MMF system and the novel application in closed treatment of patients with multiple concurrent mandibular fractures. Methods: We enrolled eight patients with concurrent mandibular fractures and treated them with the MatrixWAVE MMF system...
September 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/29115190/cervical-injury-related-to-mandibular-fractures-a-retrospective-study-of-315-cases
#10
Tommaso Cutilli, Secondo Scarsella, Desiderio Di Fabio, Antonio Oliva, Maria Adelaide Continenza, Giacomo Sollecchia, Stefano Necozione, Sara Bernardi
Objective To define the association between mandibular fractures and alterations of the cranio-atlo-axial joint (CAAJ). Methods 315 cases of displaced mandibular fractures were retrospectively evaluated by CT scan and cervical X-ray for associated alterations of the CAAJ. Statistical analysis employed the chi-square and Cohen's kappa coefficient. Results Single fractures amounted to 69.84% and multiple fractures to 30.16% of total fractures. CT scans showed a rotation of the atlas on the same side of single fractures and subluxation of the CAAJ...
November 8, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/29109843/posttraumatic-parotid-sialocele-complicating-a-mandibular-fracture-a-case-report
#11
Jesse Falk, Ryan Borgwardt, Stephen MacLeod
Blunt trauma to the parotid resulting in the formation of a sialocele is rare, with only three cases identified in the literature. We present a unique case involving a 32-year-old man with blunt trauma resulting in a left mandibular angle fracture. The patient underwent open reduction and internal fixation of the left mandibular angle fracture via transoral approach. At follow-up, after resolution of the edema from the injury, a sialocele was noted in the region of the left anterior parotid gland. The patient was treated conservatively with antisialagogues, pressure dressings, and multiple percutaneous aspirations that ultimately resulted in resolution of the sialocele...
December 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/29109841/mandibular-reconstruction-with-lateral-tibial-bone-graft-an-excellent-option-for-oral-and-maxillofacial-surgery
#12
Ana Lucia Carpi Miceli, Livia Costa Pereira, Thiago da Silva Torres, Mônica Diuana Calasans-Maia, Rafael Seabra Louro
Autogenous bone grafts are the gold standard for reconstruction of atrophic jaws, pseudoarthroses, alveolar clefts, orthognathic surgery, mandibular discontinuity, and augmentation of sinus maxillary. Bone graft can be harvested from iliac bone, calvarium, tibial bone, rib, and intraoral bone. Proximal tibia is a common donor site with few reported problems compared with other sites. The aim of this study was to evaluate the use of proximal tibia as a donor area for maxillofacial reconstructions, focusing on quantifying the volume of cancellous graft harvested by a lateral approach and to assess the complications of this technique...
December 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/29109814/evaluation-of-dentin-defect-formation-during-retreatment-with-hand-and-rotary-instruments-a-micro-ct-study
#13
Ayca Yilmaz, Dilek Helvacioglu-Yigit, Cansu Gur, Handan Ersev, Gullu Kiziltas Sendur, Egemen Avcu, Canan Baydemir, Paul Vincent Abbott
The purpose of this study was to compare the incidence and longitudinal propagation of dentin defects after gutta-percha removal with hand and rotary instruments using microcomputed tomography. Twenty mandibular incisors were prepared using the balanced-force technique and scanned in a 19.9 μm resolution. Following filling with the lateral compaction technique, gutta-percha was removed with ProTaper Universal Retreatment (PTUR) or hand instruments. After rescanning, a total of 24,120 cross-sectional images were analyzed...
2017: Scanning
https://www.readbyqxmd.com/read/29090254/removal-of-a-fractured-needle-during-inferior-alveolar-nerve-block-two-case-reports
#14
Jae-Seek You, Su-Gwan Kim, Ji-Su Oh, Hae-In Choi, Myeong-Kwan Jih
The inferior alveolar nerve block is the most common method of local anesthesia for intraoral surgery at the posterior mandibular region. However, unexpected complications may occur when administering the local anesthesia. One of these uncommon complications is the fracture of the needle. If the injection needle is broken during the surgery, it should be removed immediately. However, this is one of the most difficult procedures. In this report, we present two cases of needle fracture during the procedure, and its successful removal under general/local anesthesia administration...
September 2017: J Dent Anesth Pain Med
https://www.readbyqxmd.com/read/29076315/retromandibular-reduction-of-medially-dislocated-condylar-process-fractures
#15
Gyu Hyeong Lee, Dong Hee Kang, Sang Ah Oh
Background: Condylar process fractures are accounting for one-third of all mandibular fractures and the distal fragment is prone to dislocate to the medial side due to the pulling of lateral pterygoid muscle. Retromandibular approaches are commonly used but the intraoperative view becomes limited in medially dislocated fracture. This study summarized the cases of retromandibular reduction for medially dislocated condylar process fractures and described our supplementary procedure to realign dislocated condylar process...
October 27, 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/29067737/biomechanical-assessment-of-restored-mandibular-molar-by-endocrown-in-comparison-to-a-glass-fiber-post-retained-conventional-crown-3d-finite-element-analysis
#16
Mohammed Abu Helal, Zhigang Wang
PURPOSE: To compare equivalent and contact stresses in a mandibular molar restored by all-ceramic crowns through two methods: ceramic endocrowns and ceramic crowns supported by fiber-reinforced composite (FRC) posts and core, by using 3D finite element analysis during normal masticatory load. MATERIALS AND METHODS: Three 3D models of a mandibular first molar were made and labeled as such: intact molar with no restoration (A); ceramic endocrown-restored molar (B); ceramic crown supported by FRC posts and core restored molar (C)...
October 25, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29066066/a-historical-perspective-with-current-opinion-on-the-management-of-atrophic-mandibular-fractures
#17
REVIEW
Jaime Castro-Núñez, Larry L Cunningham, Joseph E Van Sickels
The management of atrophic mandibular fractures has been a challenge for maxillofacial surgeons for decades. During the past 70 years, various techniques for treating edentulous mandibular fractures have been advocated. These techniques have been praised, criticized, abandoned, improved, and used in combination with other methods. Although some of the principles of management outlined before the end of World War II are still valid in today's technological era, other concepts did not survive the test of time...
September 27, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29064221/management-of-mandibular-fractures-in-pediatric-patients-with-conservative-technique-a-case-series
#18
Manisha Sahni Prabhakar, Khushboo Kansal, Arjun Chawdhry
The management of fractures in children is complex compared to that of adults because of greater elasticity of bone, presence of tooth buds, faster healing rate, potential for future growth and lesser co-operative ability. Fractures of the mandible in children are conventionally treated by circummandibular wiring. This paper reports a variation in the technique of using circummandibular wiring with acrylic splints in the conservative treatment of mandibular fractures in two pediatric patients.
March 2017: Journal of the California Dental Association
https://www.readbyqxmd.com/read/29062645/a-technique-for-reduction-of-edentulous-fractures-using-dentures-and-smartlock-hybrid-fixation-system
#19
Anna Rose Carlson, Ronnie Labib Shammas, Alexander Christopher Allori, David Bryan Powers
Establishing anatomic reduction of an edentulous mandible fracture is a frequently acknowledged challenge in craniomaxillofacial trauma surgery. In this study, we report a novel method for the reduction of the edentulous mandible fracture, via fabrication of modified Gunning splints using existing dentures and SMARTLock hybrid arch bars. This technique dramatically simplifies the application of an arch bar to dentures, obviates the need for the fabrication of impressions and custom splints, and eliminates the lag time associated with the creation of splints...
September 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/29056288/evaluation-of-an-experimental-oblique-plate-for-osteosynthesis-of-mandibular-condyle-fractures
#20
Florian Wagner, Martin Strasz, Hannes Traxler, Kurt Schicho, Rudolf Seemann
OBJECTIVE: The aim of this study was to test the bone thickness and potential screw length for osteosynthesis of condylar base fractures (according to the Loukota classification) with an experimental titanium plate, placed in an ideal position against 2 types of conventional plates. STUDY DESIGN: After exclusion of completely edentulous mandibles, 28 dentate macerated mandibles available at the time of the study were included. Linear regression models 1 and 2 compared the sums of the 2 cranial bone thicknesses and the 3 caudal thicknesses among the 3 different plate designs, and linear models 3 and 4 tested the bone thickness in the 2 most cranial screw axes...
September 21, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
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