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Mandible reconstruction

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https://www.readbyqxmd.com/read/28433213/three-dimensional-surgical-modelling-with-an-open-source-software-protocol-study-of-precision-and-reproducibility-in-mandibular-reconstruction-with-the-fibula-free-flap
#1
L Ganry, J Quilichini, C M Bandini, P Leyder, B Hersant, J P Meningaud
Very few surgical teams currently use totally independent and free solutions to perform three-dimensional (3D) surgical modelling for osseous free flaps in reconstructive surgery. This study assessed the precision and technical reproducibility of a 3D surgical modelling protocol using free open-source software in mandibular reconstruction with fibula free flaps and surgical guides. Precision was assessed through comparisons of the 3D surgical guide to the sterilized 3D-printed guide, determining accuracy to the millimetre level...
April 19, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28426184/alterations-in-mandibular-morphology-associated-with-glypican-1-and-glypican-3-gene-mutations
#2
M Mian, S Ranjitkar, G C Townsend, P J Anderson
OBJECTIVES: Glypican 1 (GPC1) and glypican 3 (GPC3) are bone co-regulators that act downstream in many of the signalling pathways associated with craniosynostosis. Morphometric data from GPC-knockout mice were analysed to determine whether elimination of GPC1 and GPC3 genes would alter mandibular morphology. SETTING AND SAMPLE POPULATION: The murine model included five male and five female mandibles in each of GPC1-knockout, GPC1/GPC3-knockout and wild-type (control) groups...
April 20, 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28420035/prospective-series-of-reconstruction-of-complex-composite-mandibulectomy-defects-with-double-island-free-fibula-flap
#3
Edward I Chang, Peirong Yu
BACKGROUND: A double island free fibula (DIFF) flap can be used for reconstruction of through-and-through or complex mandibulectomy defects, but prospective studies are lacking. METHODS: Prospective analysis of all double skin paddle fibula flaps performed from 2010 to 2016. RESULTS: Overall, 16 patients underwent reconstruction with a DIFF flap (average age: 59.1 years). One patient, who underwent a DIFF flap and developed osteoradionecrosis, requiring a second flap...
April 18, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28419844/triple-cut-computer-aided-design-computer-aided-modeling-more-oncologic-safety-added-to-precise-mandible-modeling
#4
Vittorio Ramella, Alberto Franchi, Stefano Bottosso, Giancarlo Tirelli, Federico Cesare Novati, Zoran Marij Arnež
PURPOSE: Computer-aided design-computer-aided modeling (CAD-CAM) has become standard in mandibular reconstruction because it offers better outcomes. Occasionally, the reconstructive plans need to be changed intraoperatively and the custom-made prefabricated devices may become inadequate. We present an efficient adjunct to the standard CAD-CAM technique that resolves this problem. MATERIALS AND METHODS: Customized surgical devices with our "triple-cut" concept were used in 5 patients for mandibular reconstruction with free fibula flap (4 after mandibular resection for squamous cell carcinoma and 1 after mandibular osteoradionecrosis)...
March 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28409207/the-precise-repositioning-instrument-for-genioplasty-and-a-three-dimensional-printing-technique-for-treatment-of-complex-facial-asymmetry
#5
Lin Wang, Dan Tian, Xiumei Sun, Yanju Xiao, Li Chen, Guomin Wu
BACKGROUND: Facial asymmetry is very common in maxillofacial deformities. It is difficult to achieve accurate reconstruction. With the help of 3D printing models and surgical templates, the osteotomy line and the amount of bone grinding can be accurate. Also, by means of the precise repositioning instrument, the repositioning of genioplasty can be accurate and quick. In this study, we present a three-dimensional printing technique and the precise repositioning instrument to guide the osteotomy and repositioning, and illustrate their feasibility and validity...
April 13, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28401439/primary-extracranial-meningioma-a-rare-location
#6
Inara Carneiro Costa Rege, Robson Rodrigues Garcia, Elismauro Francisco Mendonça
Meningiomas are benign extraaxial tumors of the central nervous system (CNS). Extracranial meningiomas are extremely rare (2%) and can develop as a direct extension from a primary intracranial meningioma or as true primary extracranial meningioma originating from ectopic arachnoid cells. Only eight cases of primary meningioma in the jaw have been reported to date. Extracranial meningiomas are frequently misdiagnosed, resulting in inappropriate clinical management. The aim of this article was to describe the case of a man with an asymptomatic swelling in the right retromolar area over a period of 2 months...
April 11, 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28400671/distraction-osteogenesis-using-combined-locking-plate-and-ilizarov-fixator-in-the-treatment-of-bone-defect-a-report-of-2-cases
#7
John Mukhopadhaya, Manish Raj
Distraction osteogenesis and bone transport has been used to reconstruct bone loss defect by allowing new bone to form in the gap. Plate-guided bone transport has been successfully described in literature to treat bone loss defect in the femur, tibia, and mandible. This study reports two cases of fracture of femur with segmental bone loss treated with locking plate fixation and bone transport with Ilizarov ring fixator. At the time of docking, when the transport segment is compressed with bone fragment, the bone fragment is fixed with additional locking or nonlocking screws through the plate...
March 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28396232/treatment-of-osteomyelitis-a-case-for-disruption-of-the-affected-adjacent-periosteum
#8
J W Hudson, Austin P Daly, Michael Foster
PURPOSE: To evaluate the response of mandibular osteomyelitis treated by surgical decortication with disruption of the affected adjacent periosteum in concert with long-term targeted antibiotic therapy. The hypothesis is that, by removing the buccal cortical plate and disrupting the hypertrophically inflamed adjacent periosteum, the medullary bone will be brought in contact with bleeding tissue and circulating immunologic factors and antibiotics, which will promote definitive resolution...
March 18, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28390760/restricted-mandibular-movement-attributed-to-ossification-of-mandibular-depressors-and-medial-pterygoid-muscles-in-patients-with-fibrodysplasia-ossificans-progressiva-a-report-of-3-cases
#9
Tetsuko Okuno, Hitoshi Suzuki, Akio Inoue, Jingo Kusukawa
Fibrodysplasia ossificans progressiva (FOP) is an extremely rare genetic condition characterized by congenital malformation and progressive heterotopic ossification (HO) caused by a recurrent single nucleotide substitution at position 617 in the ACVR1 gene. As the condition progresses, HO leads to joint ankylosis, breathing difficulties, and mouth-opening restriction, and it can shorten the patient's lifespan. This report describes 3 cases of FOP confirmed by genetic testing in patients with restricted mouth opening...
March 16, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28386463/scaffold-degradation-during-bone-tissue-reconstruction-in-macaca-nemestrina-mandible
#10
REVIEW
Endang W Bachtiar, Lisa Rinanda Amir, Pradono Suhardi, Basril Abas
OBJECTIVE: To examine the degradation of three scaffolds composed of hydroxyapatite/tricalcium phosphate (HA/TCP) with 70∶30 ratio, HA/TCP with 50∶50 ratio, and HA/TCP/chitosan scaffold as analyzed by the RNA expression of matrix metalloprotease 2 (MMP2), interleukin 13 (IL13), and tartrate-resistant acid phosphatase (TRAP) genes. METHODS: The three tested scaffolds and dental pulp stromal cells (DPSCs) were transplanted into the mandibular bone defect of six young male Macaca nemestrina...
June 1, 2016: Interventional Medicine & Applied Science
https://www.readbyqxmd.com/read/28384463/desmoplastic-fibroma-of-the-mandible-in-a-pediatric-patient-a-case-report-of-resection-and-reconstruction-with-a-six-year-follow-up
#11
Hernán Ramírez Skinner, Alex Vargas, Antonieta Solar, Camila Foncea, Paula Astorga
Desmoplastic fibroma (DF) of bone is considered a benign but locally aggressive tumor of fibroblastic origin. DF is rare, representing less than 1% of all bone tumors. Approximately 84% of patients are younger than 30 years. DF has a slow but aggressive growth potential and can recur locally when it has not been completely excised. Complete resection is the treatment of choice to decrease recurrence and morbidity. Mandibular reconstruction is mandatory in pediatric patients to ensure correct craniofacial development...
March 14, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28381373/the-use-of-patient-specific-implants-in-orthognathic-surgery-a-series-of-30-mandible-sagittal-split-osteotomy-patients
#12
Juho Suojanen, Junnu Leikola, Patricia Stoor
PURPOSE: Virtual surgery combined with patient-specific saw and drill guides and osteosynthesis materials are rapidly spreading from reconstructive surgery to orthognathic surgery. Most commercial partners are already providing computer-aided design and computer-aided manufacture (CAD/CAM) wafers and patient-specific saw guides. Clear benefits have been demonstrated for custom-made drill guides combined with individually designed three-dimensional (3D) printed patient-specific implants (PSI) as a reposition and fixation system in Le Fort I osteotomy...
March 3, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28365396/use-of-the-3d-surgical-modelling-technique-with-open-source-software-for-mandibular-fibula-free-flap-reconstruction-and-its-surgical-guides
#13
L Ganry, B Hersant, J Quilichini, P Leyder, J P Meningaud
INTRODUCTION: Tridimensional (3D) surgical modelling is a necessary step to create 3D-printed surgical tools, and expensive professional software is generally needed. Open-source software are functional, reliable, updated, may be downloaded for free and used to produce 3D models. Few surgical teams have used free solutions for mastering 3D surgical modelling for reconstructive surgery with osseous free flaps. We described an Open-source software 3D surgical modelling protocol to perform a fast and nearly free mandibular reconstruction with microvascular fibula free flap and its surgical guides, with no need for engineering support...
March 29, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28359016/reconstruction-of-mandible-a-fully-digital-workflow-from-visualized-iliac-bone-grafting-to-implant-restoration
#14
Taoran Tian, Tao Zhang, Quanquan Ma, Qi Zhang, Xiaoxiao Cai
PURPOSE: Although digital aids can help surgeons compensate for the shortcomings of traditional mandibular reconstruction techniques to perform surgery more precisely and effectively, the use of these digital techniques has often been fragmented, divided, and incomplete. This article describes the workflow of a fully digital mandibular reconstruction to explore the proper indications and discusses innovations based on the accuracy and effectiveness of digital techniques. MATERIALS AND METHODS: A restoration-oriented mandibular reconstruction was performed by applying different digital techniques...
March 7, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28358629/reconstruction-of-a-mandibular-segmental-defect-with-a-customized-3-dimensional-printed-titanium-prosthesis-in-a-cat-with-a-mandibular-osteosarcoma
#15
Julius M Liptak, Graham P Thatcher, Jonathan P Bray
CASE DESCRIPTION A 12-year-old neutered male domestic shorthair cat had been treated for a mass arising from the lingual aspect of the caudal right mandibular body. Cytoreductive surgery of the mass had been performed twice over a 2-year period, but the mass recurred following both surgeries. The mass was diagnosed as an osteosarcoma, and the cat was referred for further evaluation and treatment. CLINICAL FINDINGS Clinical findings were unremarkable, except for a 2-cm-diameter mass arising from the lingual aspect of the right mandible and mild anemia and lymphopenia...
April 15, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28351395/follicular-thyroid-carcinoma-metastasis-to-the-facial-skeleton-a-systematic-review
#16
Varun V Varadarajan, Elizabeth K Pace, Vatsal Patel, Raja Sawhney, Robert J Amdur, Peter T Dziegielewski
BACKGROUND: Follicular thyroid carcinoma (FTC) metastasis to the facial skeleton is exceedingly rare. A case of FTC metastasizing to the mandible is presented and a systematic review of the literature describing thyroid metastasis to the facial skeleton is performed. CASE PRESENTATION: A 73-year-old female presented with metastatic FTC to the mandible and underwent total thyroidectomy, segmental mandibulectomy, bone impacted fibular free flap reconstruction, and adjuvant radioactive iodine treatment...
March 28, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28350556/resorbable-plates-prevent-regression-in-pediatric-mandibular-distraction-osteogenesis
#17
Brandon Kikuo Richland, Christopher Ellstrom, Asim Ahmad, Daniel Jaffurs
BACKGROUND: Mandibular distraction osteogenesis is an important technique to correct the pediatric hypoplastic mandible. Regression of the mandible after distraction continues to be a challenge, with some studies reporting up to 22% to 56% decrease toward predistraction length in the first year. We hypothesize that a resorbable plate placed after removal of the distractor will provide additional stability to newly formed bone, allowing further time for consolidation and minimizing regression...
May 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28350523/comparison-of-micro-ct-and-cone-beam-ct-on-the-feasibility-of-assessing-mandibular-trabecular-structures-in-mandibular-condyle
#18
Xin Liang, Zuyan Zhang, Jianping Gu, Zhihui Wang, Bart Vandenberghe, Reinhilde Jacobs, Jie Yang, Guowu Ma, Haibin Ling, Xuchen Ma
OBJECTIVES: To evaluate the accuracy of Cone-beam CT (CBCT) in assessing trabecular structures Methods: Two human mandibles were scanned by micro-CT (Skyscan 1173 high energy spiral scan micro-CT, Skyscan NV, Kontich, Belgium) and CBCT(3D Accuitomo 170, Morita Japan). The CBCT images were reconstructed in 0.5mm and 1 mm thickness. The condylar images were selected for registration. A parallel algorithm for histogram computation was introduced to perform the registration. Mutual information (MI) value was used to evaluate the match between the images obtained from micro-CT and CBCT...
March 28, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28349601/guided-bone-regeneration-of-non-contained-mandibular-buccal-bone-defects-using-deproteinized-bovine-bone-mineral-and-a-collagen-membrane-an-experimental-in%C3%A2-vivo-investigation
#19
Mariano Sanz, Luca Ferrantino, Fabio Vignoletti, Massimo de Sanctis, Tord Berglundh
AIM: The aim of this pre-clinical in vivo study was to analyse different stages of wound healing after guided bone regeneration in non-contained mandibular buccal bone defects. MATERIALS AND METHODS: Eighteen female beagle dogs, between 1.5 and 2 years old, were used. Buccal bone defects were created in the mandible following extraction of the mesial roots of M1, P4, the distal root of P3 and booth roots of P2. Augmentation procedures of the healed defects were performed 3 months later using a bone replacement graft (T1), an absorbable collagen membrane (T2) or a combination of both procedures (T3)...
March 27, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28339612/orthodontically-induced-cervical-root-resorption-in-humans-is-associated-with-the-amount-of-tooth-movement
#20
Alexander Dudic, Catherine Giannopoulou, Paolo Meda, Xavier Montet, Stavros Kiliaridis
Introduction: The aim of this study was to investigate the variation in the amount of the orthodontically induced cervical root resorption and the association with several factors, such as the amount of tooth displacement, location of tooth in the maxilla or mandible, and presence of an interference that may influence the amount of root resorption. Subjects and methods: This study included 30 subjects (20 females, 10 males) with an age range of 11.3 to 43.0 years...
January 25, 2017: European Journal of Orthodontics
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