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Mandibular reconstruction

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https://www.readbyqxmd.com/read/28337986/simultaneous-treatment-of-temporomandibular-joint-ankylosis-with-severe-mandibular-deficiency-by-standard-tmj-prosthesis
#1
YiHui Hu, LuZhu Zhang, DongMei He, Chi Yang, MinJie Chen, ShanYong Zhang, Hui Li, Edward Ellis Iii
Temporomandibular joint (TMJ) ankylosis is a refractory disease that is difficult to predictably treat. This study evaluated the prognosis of using standard alloplastic TMJ prostheses for the treatment of TMJ ankylosis in Chinese patients with severe mandibular deficiency. Patients treated from 2013 to 2015 were reviewed. The computer-aided design and manufacture (CAD/CAM) technique was used to guide bony mass removal and locate the TMJ prosthesis (Biomet, USA). Eleven patients were included in this study. All prostheses were successfully installed and stabilized intraoperatively...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28330577/-custom-made-implant-for-complex-facial-reconstruction-a-case-of-total-replacement-of-temporo-mandibular-joint-zygomatic-arch-and-malar-bone
#2
D Guillier, V Moris, L-A See, M Girodon, B-L Wajszczak, N Zwetyenga
INTRODUCTION: Total prosthetic replacement of the temporo-mandibular joint (TMJ) has become a common procedure, but it is usually limited to the TMJ itself. We report about one case of complex prosthetic joint reconstruction extending to the neighbouring bony structures. CASE: A 57-year-old patient, operated several times for a cranio-facial fibrous dysplasia, presented with a recurring TMJ ankylosis and a complexe latero-facial bone loss on the right side. We performed a reconstruction procedure including the TMJ, the zygomatic arch and the malar bone by mean of custom made composite prosthesis (chrome-cobalt-molybdenum-titanium and polyethylene)...
February 2017: J Stomatol Oral Maxillofac Surg
https://www.readbyqxmd.com/read/28328603/simultaneous-autologus-mandible-and-temporomandibular-joint-reconstruction
#3
Yigit Ozer Tiftikcioglu, Ersin Gur, Ufuk Bilkay
Ablative surgery of mandible often necessitates combined reconstruction of the mandible and the temporomandibular joint. Fibula-free flaps with gap arthroplasty or osseochondral grafts are common procedures in the authors' practice. In search for a better reconstructive option free fibula flap is used together with a metatarsal bone flap for the vascular reconstruction of the mandibular body and the condyle at the same time. The 2 osseous-free flaps have been fused and used as a combined flow through double-free flap...
March 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28326738/-dental-implantation-in-a-patient-with-sj%C3%A3-gren-s-syndrome-a-case-report
#4
Luo Cuifen, Peng Guoguang, Feng Yuanhua, Huang Xingxiang
We reported one case of a patient with Sjögren's syndrome and dental implant. This patient was followed up for more than one year. The patient was diagnosed with Sjögren's syndrome for 5 years and treated with long-term corticosteroid. Four implant-tissue interface hydrophilic implants were placed on 15, 16, 44, and 46 of the mandibular and maxillary areas. After the surgery was completed, the patient was treated with oral antibiotic and "shenggu pills" to prevent infection and glucocorticoid to manage Sjögren's syndrome...
February 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28326709/-cone-beam-computed-tomography-analysis-of-the-bony-structure-of-the-temporomandibular-joint-during-two-phase-treatment-with-herbst-appliance
#5
Chen Weiwei, Sang Ting, Huang Zhen, Wu Jun
OBJECTIVE: This study assessed the effects of two-phase treatment with Herbst appliance on the bony structure of the temporomandibular joint via cone beam computed tomography (CBCT) analysis. METHODS: This study selected 15 patients exhibiting early permanent dentition and classⅡmalocclusion combined with mandibular retrusion treated by a two phase treatment (Herbst and fixed appliance). The CBCT scans of the patients were obtained at the following stages: 2 weeks before Herbst treatment (T1), at the start of treatment when the Herbst appliance was set in place (T2), immediately after removal of the Herbst appliance (T3), and immediately after removal of the edgewise appliance (T4)...
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28318167/-changes-in-ultrastructure-and-bone-morphogenetic-protein-expression-in-reconstructed-mandibular-condylar-cartilage-under-continuous-mandibular-advancement-in-adult-rats
#6
Yang Shuai, Li Xue, Gao Jie, Cai Yizhi, Li Ronghui, Wang Mingguo
OBJECTIVE: This study investigated the reconstructed mandibular condylar cartilage and the ultrastructural variations in mandibular condylar cartilage in adult rats as a result of mandibular advancement. METHODS: Thirty 9-week-old male Sprague-Dawley rats were randomly divided into experimental and control groups. Rats in the experimental group were subjected to mandibular advancement. Rats were sacrificed on days 3, 7, 14, 21, 30. Sections were cut from condyles, and bone morphogenetic protein-2 (BMP-2) expression in condylar cartilage was examined through immunohistochemical analysis...
December 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28296984/implant-stability-and-bone-characteristics-in-free-fibula-flaps-used-for-jaw-reconstruction-a-prospective-cohort-study
#7
Vinay V Kumar, Ullash Kumar, Vijay Pillai, Vinotha Ponnusamy, Bilal Al-Nawas, Moni A Kuriakose
PURPOSE: The primary objective of this prospective cohort study was to evaluate primary and secondary implant stability values of implants placed into healed free fibula-reconstructed mandibles. The secondary objective was to investigate whether a correlation existed between primary implant stability and the quantity of cortical bone-implant contact and of cortical fibular bone in contact with the implants. MATERIALS AND METHODS: The study participants are patients enrolled in a registered trial (No...
March 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28295569/simultaneous-vascularized-bony-reconstruction-of-the-maxilla-and-mandible-using-a-single-fibula-a-case-report
#8
Alexander F Mericli, Jonathan S Friedstat, Edward I Chang, Matthew M Hanasono
Simultaneous maxillary and mandibular reconstruction is exceedingly rare. These are complicated cases, requiring consideration of multiple variables: defect components, donor site morbidity, recipient vessels, and so forth. We describe a unique case of secondary maxillary/mandibular reconstruction in a 59-year-old male. The original defect was created after removal of a buccal squamous cell carcinoma, involving the external cheek skin, buccal mucosa, right mandibular body, and right inferior maxilla; a free vertical rectus abdominis musculocutaneous flap was used for the initial reconstruction...
March 2017: Microsurgery
https://www.readbyqxmd.com/read/28293514/platysma-motor-nerve-transfer-for-restoring-marginal-mandibular-nerve-function
#9
Andres Rodriguez-Lorenzo, David Jensson, Wolfgang J Weninger, Melanie Schmid, Stefan Meng, Chieh-Han John Tzou
BACKGROUND: Injuries of the marginal mandibular nerve (MMN) of the facial nerve result in paralysis of the lower lip muscle depressors and an asymmetrical smile. Nerve reconstruction, when possible, is the method of choice; however, in cases of long nerve gaps or delayed nerve reconstruction, conventional nerve repairs may be difficult to perform or may provide suboptimal outcomes. Herein, we investigate the anatomical technical feasibility of transfer of the platysma motor nerve (PMN) to the MMN for restoration of lower lip function, and we present a clinical case where this nerve transfer was successfully performed...
December 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28293492/a-rare-case-of-malignant-transformation-of-oral-lichen-planus-of-the-mandible
#10
Joanne Soo, George Kokosis, Michael Ogilvie, Xiaoyin Sara Jiang, David B Powers, Daniel J Rocke, Detlev Erdmann
Oral lichen planus (OLP) is an immune-mediated mucocutaneous disease associated with an increased risk in oral squamous cell carcinoma (OSCC). Nearly all cases of malignant transformation have been reported in patients >40 years old. We report the case of a 37-year-old woman with a 5-year history of erosive OLP who presented with malignant transformation to OSCC. Delineating the margins of the disease was impossible at presentation given her OLP, and she was initially treated with concurrent chemoradiation therapy...
December 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28293441/free-gingival-graft-to-increase-keratinized-mucosa-after-placing-of-mandibular-fixed-implant-supported-prosthesis
#11
Danny Omar Mendoza Marin, Andressa Rosa Perin Leite, Lélis Gustavo Nícoli, Claudio Marcantonio, Marco Antonio Compagnoni, Elcio Marcantonio
Insufficiently keratinized tissue can be increased surgically by free gingival grafting. The presence or reconstruction of keratinized mucosa around the implant can facilitate restorative procedure and allow the maintenance of an oral hygiene routine without irritation or discomfort to the patient. The aim of this clinical case report is to describe an oral rehabilitation procedure of an edentulous patient with absence of keratinized mucosa in the interforaminal area, using a free gingival graft associated with a mandibular fixed implant-supported prosthesis...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28291570/refining-the-indications-for-scapula-tip-in-mandibular-reconstruction
#12
M W Ho, J S Brown, R J Shaw
Mandibular reconstruction in osteoradionecrosis or salvage surgery can often be complicated by the lack of suitable recipient vessels in the ipsilateral neck and the associated requirement for significant extraoral skin reconstruction. The scapula tip with its long vascular pedicle and option of a chimeric soft tissue component offers a versatile reconstructive solution in such cases. This article reports four consecutive cases of mandibular reconstruction with poor ipsilateral vascular options and additional soft tissue requirements in which the scapula tip was justified and preferred...
March 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28291396/mandibular-reconstruction-by-using-a-liquid-nitrogen-treated-autograft-in-a-dog-with-an-oral-tumor
#13
Yasuhiko Okamura, Kazuki Heishima, Tomoki Motegi, Jun Sasaki, Masanobu Goryo, Hideji Nishida, Hiroyuki Tsuchiya, Masaaki Katayama, Yuji Uzuka
A 10 yr old intact female German shepherd dog presented with a large peripheral odontogenic fibroma and malignant melanoma on her lower jaw. The tumor was resected with a unilateral subtotal rostral hemimandibulectomy. After the mandible was removed, it was devitalized intraoperatively by freezing it in liquid nitrogen. It was subsequently reimplanted. New bone tissue formed in the gap between the frozen bone and the host bone. The regenerated bone contained osteocytes, osteoblasts, and blood vessels. The cosmetic appearance of the dog was preserved...
March 14, 2017: Journal of the American Animal Hospital Association
https://www.readbyqxmd.com/read/28286393/versatility-of-fibula-free-flap-in-reconstruction-of-facial-defects-a-center-study
#14
Sunil S Shroff, Sanjiv C Nair, Anjan Shah, Balasubramanya Kumar
PURPOSE: To study a series of cases where vascularised fibula flap was used in various combinations of bone with muscle and skin along with its modifications for reconstruction of simple and composite defects of the facial region. PATIENTS AND METHODS: The investigators designed a retrospective study composed of patients with any pathology or defect who underwent reconstruction of maxilla or mandible with vascularised fibula free flap from 2009 to 2013. All patients were evaluated for age, gender, location and type of defect, incorporation of adjoining skin paddle and muscle, number of fibula osteotomies, ischaemia time, anticoagulant regimen, length of hospital stay, flap failure rate, dental implant rehabilitation...
March 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28286388/autogenous-bone-marrow-aspirate-coated-synthetic-hydroxyapatite-for-reconstruction-of-maxillo-mandibular-osseous-defects-a-prospective-study
#15
Raja Sekhar Gali, Sathya Kumar Devireddy, N Mohan Rao, R V Kishore Kumar, Sridhar Reddy Kanubaddy, Mallikarjuna Dasari, K Sowjanya, Rama Mohan Pathapati
PURPOSE: This prospective study was conducted to evaluate the bone regeneration capacity of synthetic hydroxyapatite mixed with autogenous bone marrow aspirate when used as a bone graft substitute in maxillo-mandibular osseous defects. METHODS: This study included nine patients with histopathalogically proven benign osteolytic lesions in maxilla and mandible that were treated with enucleation or marginal resection followed by bone marrow aspirate coated synthetic biphasic hydroxyapatite (hydroxyapatite and beta tricalcium phosphate) graft placement...
March 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28279055/-mri-analysis-of-the-effect-on-mandibular-retrusion-with-anterior-disc-displacement-treated-by-using-herbst-appliance
#16
X Yu, J Q Liu, L J Yuan, L X Mao, M Zhu, B Fang
Objective: To investgate the effect of Herbst appliance on the growth and remodeling of the temporomandibular joint (TMJ) in class Ⅱ patients with mandibular retrusion by using MRI. Methods: Between December 2010 and October 2014, 12 class Ⅱ patients (11-16 years old) with mandibular retrusion were chosen. The patients were divided into two groups. The control group included 7 patients (14 joints) with normal disc condyle relationship and the anterior disc displacement (ADD) group included 5 patients (10 joints) with anterior disc displacement...
March 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28275282/additive-manufacturing-for-surgical-planning-of-mandibular-fracture
#17
Nadja Maria da Silva Oliveira Brito, Renata de Souza Coelho Soares, Erik Lafitt Tavares Monteiro, Sergio Charifker Ribeiro Martins, Josuel Raimundo Cavalcante, Rafael Grotta Grempel, José Augusto de Oliveira Neto
Currently, imaging techniques such as Computed Tomography with three-dimensional reconstruction (3D) and Magnetic Resonances are being routinely used in pre-surgical planning in all fields of medicine. Nowadays, virtual three-dimensional images, commonly displayed on two-dimensional surfaces, such as the computer screen, can be used to produce rapidly prototyped models, with excellent dimensional accuracy and fine reproduction of anatomical structures, providing professionals with the ability to use the biomodel in planning and simulating medical and dental procedures (oral and maxillofacial surgery, making individualized facial implants and prostheses, measurements and previous adaptations of prefabricated fixation plates), thus contributing to considerable reductions in surgical time and consequently the duration of anesthesia, minimizing infection risks and reducing hospital costs...
December 2016: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/28268834/automatic-segmentation-and-user-friendly-software-techniques-for-virtual-surgical-planning-of-mandibular-reconstruction
#18
Youngjun Kim, Sunhee Kim, Hannah Kim, Hyunchul Cho, Deukhee Lee, Laehyun Kim, Sehyung Park, Jung-Woo Lee
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/28268833/sparse-shape-model-for-fibular-transfer-planning-in-mandibular-reconstruction
#19
Riho Kawasaki, Megumi Nakao, Yuichiro Imai, Nobuhiro Ueda, Toshihide Hatanaka, Mao Shiba, Tadaaki Kirita, 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/28268767/stability-of-the-permanently-bent-plates-used-in-mandibular-reconstructive-surgery
#20
Si-Myung Park, Deukhee Lee, Jung-Woo Lee, Youngjun Kim, Laehyun Kim, Gunwoo Noh
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
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