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Mandibular reconstruction

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https://www.readbyqxmd.com/read/28227031/automatic-segmentation-and-user-friendly-software-techniques-for-virtual-surgical-planning-of-mandibular-reconstruction
#1
Youngjun Kim, Sunhee Kim, Hannah Kim, Hyunchul Cho, Deukhee Lee, Laehyun Kim, Sehyung Park, Jung-Woo Lee, Youngjun Kim, Sunhee Kim, Hannah Kim, Hyunchul Cho, Deukhee Lee, Laehyun Kim, Sehyung Park, Jung-Woo Lee, Sehyung Park, Jung-Woo Lee, Laehyun Kim, Youngiun Kim, Sunhee Kim, Deukhee Lee, Hannah Kim, Hyunchul Cho
Compared to conventional mandibular reconstruction surgery, a recent approach of virtual planning can reduce surgical time providing reliable surgical outcomes. We present our virtual surgical planning software using automatic segmentation and user-friendly techniques. Evaluation experiments compared with a commercial software prove that the proposed software can achieve successful surgical planning in reduced time with reliable accuracy.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227030/sparse-shape-model-for-fibular-transfer-planning-in-mandibular-reconstruction
#2
Riho Kawasaki, Megumi Nakao, Yuichiro Imai, Nobuhiro Ueda, Toshihide Hatanaka, Mao Shiba, Tadaaki Kirita, Tetsuya Matsuda, Riho Kawasaki, Megumi Nakao, Yuichiro Imai, Nobuhiro Ueda, Toshihide Hatanaka, Mao Shiba, Tadaaki Kirita, Tetsuya Matsuda, Nobuhiro Ueda, Yuichiro Imai, Riho Kawasaki, Toshihide Hatanaka, Megumi Nakao, Tadaaki Kirita, Mao Shiba, Tetsuya Matsuda
In this paper, we propose an automated preoperative planning method that estimates a plan fitted to the data of a new patient using a planned dataset of previous patients. Although mandibular reconstruction with fibular segments needs preoperative planning for the precise placement of segments, recent interactive planning software cannot secure objectivity of the planning and time-consuming trial-and-error processes are required. The proposed method employs sparse shape modeling; in this modeling, we select a subset of the data from a prepared preoperative planning dataset to make an example or instance of reconstruction via a linear combination of the data...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226956/stability-of-the-permanently-bent-plates-used-in-mandibular-reconstructive-surgery
#3
Si-Myung Park, Deukhee Lee, Jung-Woo Lee, Youngjun Kim, Laehyun Kim, Gunwoo Noh, Si-Myung Park, Deukhee Lee, Jung-Woo Lee, Youngjun Kim, Laehyun Kim, Gunwoo Noh, Youngjun Kim, Si-Myung Park, Jung-Woo Lee, Laehyun Kim, Gunwoo Noh, Deukhee Lee
In mandibular reconstructive surgery, straight surgical plates are predominantly used for osteotomy. In this process, a straight plate is bent to fit to the shape of the patient's defect. This potentially compromises the stability of the plate because of changes in mechanical properties resulting from plastic deformation; however, the effect of plastic deformation on stability has yet been investigated. In this study, we assess the stability of three types of commonly used bent plates for two types of mandible defect cases, using three-dimensional finite element analysis (FEA)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226765/generation-of-3d-thermal-models-for-dentistry-applications
#4
Mauren Abreu de Souza, Andriy Guilherme Krefer, Gustavo Benvenutti Borba, Gustavo J Vizinoni E Silva, Ana Paula G O Franco, Humberto Remigio Gamba, Mauren Abreu de Souza, Andriy Guilherme Krefer, Gustavo Benvenutti Borba, Gustavo J Vizinoni E Silva, Ana Paula G O Franco, Humberto Remigio Gamba, Gustavo Benvenutti Borba, Andriy Guilherme Krefer, Ana Paula G O Franco, Mauren Abreu de Souza, Humberto Remigio Gamba, Gustavo J Vizinoni E Silva
There are a variety of medical imaging modalities available, although each modality focus into different aspects, for example: anatomical, physiological or geometrical information. This paper presents a new imaging modality (3D THERMO-SCAN) that combines anatomical computer tomography (CT) imaging slices, together with 2D infrared thermography images and 3D scanned shaped models of the area under study. Therefore, it is presented the 3D reconstructions involving a case study of a volunteer with bruxism. Some characteristics of bruxism are the hyperactivity of the chewing muscles, which changes the dynamics of microcirculation, also changing the correspondent skin's temperature...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222928/reconstruction-of-complex-mandibular-defects-using-integrated-dental-custom-made-titanium-implants
#5
A Rachmiel, D Shilo, O Blanc, O Emodi
No abstract text is available yet for this article.
February 17, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28219630/early-complications-from-the-use-of-calcium-phosphate-paste-in-mandibular-lengthening-surgery-a-retrospective-study
#6
Erica Coppey, Maurice Y Mommaerts
PURPOSE: Calcium phosphate paste is used in mandibular lengthening surgery to avoid unesthetic notching at the lower border and to help stabilize the segments when osteosynthesis slippage is a concern. The aim of this study was to investigate whether the hardened paste increases the incidence of infections. MATERIALS AND METHODS: This was a retrospective cohort study of medical charts of all patients who underwent a bilateral sagittal split osteotomy from February 2012 through July 2015...
January 26, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28218215/correlation-between-condylar-fracture-pattern-after-parasymphyseal-impact-and-condyle-morphological-features-a-retrospective-analysis-of-107-chinese-patients
#7
Lu Han, Ting Long, Wei Tang, Lei Liu, Wei Jing, Wei-Dong Tian, Jie Long
BACKGROUND: The treatment of the condylar fractures is difficult. Factors that result in the fractures are complex. The objective of this morphometric study was to investigate the relationship between condylar fracture patterns and condylar morphological characteristics. METHODS: We conducted a retrospective analysis of 107 patients admitted to the West China Hospital of Stomatology for bilateral condylar fractures caused by parasymphyseal impact. The patients were divided into five groups according to the type of condylar fracture...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28215345/presence-of-voids-after-continuous-wave-of-condensation-and-single-cone-obturation-in-mandibular-molars-a-micro-computed-tomography-analysis
#8
Elaine Faga Iglecias, Laila Gonzales Freire, George Táccio de Miranda Candeiro, Marcelo Dos Santos, João Humberto Antoniazzi, Giulio Gavini
INTRODUCTION: The objective of this study was to assess the presence of voids in mesial root canals of mandibular molar teeth obturated by using the single-cone (SC) and continuous wave of condensation (CWC) obturation techniques, and results were analyzed by using micro-computed tomography. METHODS: Twenty-four mandibular molars with fully developed roots and mesial root curvature ranging from 25° to 35° were instrumented by using Reciproc R25 files, and then they were obturated by using the SC and CWC techniques...
February 15, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28212127/surgical-management-of-mandibular-intraosseous-schwannomas
#9
Anthony DeLeonibus, Bahar Bassiri Gharb, Francis Papay, James E Zins, Antonio Rampazzo
Intraosseous schwannomas of the mandible are rare tumors that usually arise from peripheral nerve sheaths of the main trunk or branches of the inferior alveolar nerve (IAN).A systematic review of the English literature through PubMed was conducted from 1945 to 2016. Forty-nine patients of mandibular intraosseous schwannomas were identified. The most common location of the tumor was the posterior mandible (61.2%). There were 28 patients in whom the tumor involved the IAN (57.1%). The most commonly performed procedures included enucleation through a mucoperiosteal flap and a bone window (73%), curettage (10%), segmental mandibulectomy (10%), and sagittal split ramus osteotomy (6%)...
February 16, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28210410/a-case-of-glenoid-fossa-fracture-progressive-ankylosis-total-joint-reconstruction-with-alloplastic-prosthesis-to-normalized-function-including-evaluation-with-f18-pet-ct-a-four-year-follow-up
#10
Björn Lindell, Andreas Thor
Temporomandibular joint replacement (TJR) with alloplastic prosthesis has shown promising long-term results in end stage joint disorders. We present a case of young woman with painful ankylosis that where reconstructed with TJR, due to a complex mandibular fracture with dislocation of the left condyle into the middle cranial fossa two years earlier. At the age of 18 the subject underwent a total joint replacement with custom-made alloplastic TMJ prosthesis. To determine the bone response and remodeling activity around the prosthesis, a F18 PET/CT-scan was used...
March 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28207461/using-dental-implants-concomitant-with-onlay-bone-grafting-for-auricular-reconstruction
#11
Amin Rahpeyma, Saeedeh Khajehahmadi
Conventional dental implants have been reported for nasal and orbital regions but due to limited thickness of calvarium they are not used in mastoid region. Onlay bone grafting in skull concomitant with implants is a predictable method and experimental animal studies confirm it. Parietal bone and lateral mandibular ramus are suggested source of bone grafts and dental implants with 7 mm length can be used safely. Increased fixture length may lead to increase survival in long term.
February 15, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28203515/curvilinear-segmental-mandibular-reconstruction-utilizing-distraction-osteogenesis-and-early-open-callus-manipulation
#12
Alberto Rocha Pereira, Paulo Neves, José Rosa, Scott Bartlett
The authors present a new technique for reconstruction of large curvilinear mandibular defects with distraction osteogenesis and early open callus manipulation. In phase 1, transport disks are created from mandibular bone and distracted across the entire length of the defect, without the restriction from a mandible plate fixation. This allows for full-length distraction until enough regenerate is obtained to reconstruct the defect without the need for additional bone grafts. Taking advantage of the soft moldable regenerate, the second and final operative procedure allows for the manipulation, repositioning, and fixation of the transported segments in the ideal position creating perfect tridimensional form and symmetry of the mandible arch...
January 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28199316/knoetschkesuchus-langenbergensis-gen-nov-sp-nov-a-new-atoposaurid-crocodyliform-from-the-upper-jurassic-langenberg-quarry-lower-saxony-northwestern-germany-and-its-relationships-to-theriosuchus
#13
Daniela Schwarz, Maik Raddatz, Oliver Wings
We report a new, small-sized atoposaurid crocodyliform from the Upper Jurassic of Langenberg, Northeastern Germany. Atoposaurids are small-sized Mesozoic crocodyliforms of mainly European distribution, which are considered to be phylogenetically close to the origin of Eusuchia. Knoetschkesuchus langenbergensis gen. nov. sp. nov. is represented by two well-preserved skulls and additional cranial and postcranial remains representing different ontogenetic stages. 3D reconstructions of a juvenile skull based on micro-computed tomography allow the most detailed description of cranial remains of any atoposaurid hitherto presented...
2017: PloS One
https://www.readbyqxmd.com/read/28196155/subperiosteal-minimally-invasive-aesthetic-ridge-augmentation-technique-smart-a-new-standard-for-bone-reconstruction-of-the-jaws
#14
Ernesto A Lee
Traditional guided bone regeneration techniques include flap mobilization and placement of a bone graft, often with the use of space-maintaining devices and cell-occlusive membranes. This approach is associated with frequent complications that negatively affect the outcome of the augmentation and the peri-implant soft tissue esthetics. Although current tunneling techniques have focused on periodontal soft tissue applications, earlier publications described their use for horizontal augmentation of mandibular posterior edentulous ridges in full-denture patients...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28194401/clinical-application-of-cone-beam-computed-tomography-of-the-rabbit-head-part-2-dental-disease
#15
G G Riggs, Derek D Cissell, Boaz Arzi, David C Hatcher, Philip H Kass, Amy Zhen, Frank J M Verstraete
Domestic rabbits are increasing in popularity as household pets; therefore, veterinarians need to be familiar with the most common diseases afflicting rabbits including dental disease. Current diagnostic approaches include gross oral examination, endoscopic oral examination, skull radiography, and computed tomography (CT). Cone beam computed tomography (CBCT), a new oral and maxillofacial imaging modality that has the capability to produce high-resolution images, has not yet been described for use in evaluating dental disease in rabbits...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28191601/the-maxillary-artery-and-its-variants-an-anatomical-study-with-neurosurgical-applications
#16
Jorge E Alvernia, Joaquin Hidalgo, Marc P Sindou, Chad Washington, Gustavo Luzardo, Eddie Perkins, Remi Nader, Patrick Mertens
BACKGROUND: The maxillary artery (MA) has gained attention in neurosurgery particularly in cerebral revascularization techniques, intracranial endonasal approaches and endovascular procedures. OBJECTIVES: To describe and illustrate the anatomy of the MA and its neurosurgical importance in a detailed manner. METHODS: Six cadaveric heads (12 MAs) were injected with latex. The arteries and surrounding structures were dissected and studied using microsurgical techniques...
February 13, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28179928/prevalence-of-extra-roots-in-permanent-mandibular-first-molars-in-iranian-population-a-cbct-analysis
#17
Saeed Rahimi, Hadi Mokhtari, Bahram Ranjkesh, Masoomeh Johari, Mohammad Frough Reyhani, Shahriar Shahi, Sina Seif Reyhani
INTRODUCTION: Having knowledge about the anatomy of root canal system is essential for success of endodontic treatment. The present study used cone-beam computed tomography (CBCT), to evaluate the prevalence of third root in mandibular first molars in a selected Iranian population. METHODS AND MATERIALS: A total of 386 CBCT images from subjects referred to oral and maxillofacial radiology department of dental faculty of Tabriz University of Medical Sciences from 2011 to 2013 were selected and evaluated for this study and the cases with well-developed permanent mandibular first molars were included...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28177329/fibular-osteofasciocutaneous-flap-in-computer-assisted-mandibular-reconstruction-technical-aspects-in-oral-malignancies
#18
M Berrone, E Crosetti, P L Tos, M Pentenero, G Succo
Virtual surgical planning technology in head and neck surgery is witnessing strong growth. In the literature, the validity of the method from the point of view of accuracy and clinical utility has been widely documented, especially for bone modelling. To date, however, with its increased use in head and neck oncology, and consequently the increased need for bone and soft tissue reconstruction, is important to carry out the virtual programme considering not only bone reconstruction but also all aspects related to the reconstruction of soft tissue using composite flaps...
December 2016: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28169143/cost-and-lack-of-insurance-coverage-are-prohibitive-to-having-dental-implants-after-resections-for-benign-mandibular-neoplasms
#19
Zachary S Peacock, Yisi D Ji
OBJECTIVES: To assess how often patients receive dental implants after mandibular resection for benign neoplasms and to determine barriers to completion of functional reconstruction. STUDY DESIGN: This was a retrospective cohort study of patients who underwent resection for benign mandibular neoplasms between 2005 and 2014. Demographic variables included age, sex, and race. Outcome variables include rates of implant placement, implant restoration, and reasons for not having implants...
December 30, 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28155263/incidence-and-characteristics-of-mandibular-accessory-canals-a-radiographic-investigation
#20
Andrea Enrico Borgonovo, Silvio Taschieri, Virna Vavassori, Dino Re, Luca Francetti, Stefano Corbella
AIM: The aim of the present study was to explore, through tridimensional reconstructions of cone-beam computed tomography (CBCT) scans, the presence and the characteristics of mandibular accessory canals. METHODS: For each included participant, the presence of accessory canals was recorded. The diameter of the canal, as well as the distance between the canal walls and the walls of the mandibular bone (lingual, buccal, cranial and caudal), were measured and recorded...
February 2, 2017: Journal of Investigative and Clinical Dentistry
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