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Mandible reconstruction

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https://www.readbyqxmd.com/read/29333780/-progress-in-exogenous-factors-affecting-the-growth-and-remodeling-of-condylar-process
#1
Peng Qiuping, Wu Jun
Condyle is a critical growth region of the mandible where mandible by endochondral ossification occurs. Condylar cartilage belongs to the secondary cartilage, which is not only affected by genetic factors but also by stress, drug intake, and other local factors. To promote the growth of the mandible, various exogenous and local factors were used to alter the biological environment of the condylar cartilage to stimulate endochondral ossification. This article reviews studies on the influence of exogenous factors on condylar growth and reconstruction...
December 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29333372/ghost-cell-odontogenic-carcinoma-on-right-mandible-and-its-respective-surgical-reconstruction-a-case-report
#2
Sang Yoon Park, Joonhyoung Park, Do Hyun Kwon, Jae Ho Jeon, Soung Min Kim, Hoon Myoung, Jong Ho Lee
Calcifying cystic odontogenic tumor (CCOT) is defined as an odontogenic cyst-like benign neoplasm that characteristically contains several ghost cells, ameloblastoma-like epithelium, and occasional calcification. Ghost cell odontogenic carcinoma (GCOC), a malignant form of CCOT, is an exceptionally rare malignant tumor. In this report, we present a case of a 53-year-old man whose chief complaint was a solitary mass on the right mandible area. The mass was completely removed through an extraoral surgical approach and reconstructive surgery was performed in two phases...
December 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29330869/three-year-analysis-of-zirconia-implants-used-for-single-tooth-replacement-and-three-unit-fixed-dental-prostheses-a-prospective-multicenter-study
#3
Marc Balmer, Benedikt C Spies, Kirstin Vach, Ralf-Joachim Kohal, Christoph H F Hämmerle, Ronald E Jung
AIM: The aim of the present investigation was to evaluate clinically and radiographically the outcome of zirconia oral implants after 3 years in function. MATERIALS AND METHODS: In 60 patients in need of either a single-tooth replacement or a three-unit fixed dental prosthesis (FDP), a total of 71 one-piece zirconia implants were placed and immediately restored with temporary fixed prostheses. After a period of at least 2 months in the mandible and at least 4 months in the maxilla, zirconia-based reconstructions were cemented...
January 12, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29318405/the-efficacy-of-a-porcine-collagen-matrix-in-keratinized-tissue-augmentation-a-5-year-follow-up-study
#4
C Maiorana, L Pivetti, F Signorino, G B Grossi, A S Herford, M Beretta
BACKGROUND: When keratinized tissue width around dental implants is poorly represented, the clinician could resort to autogenous soft tissue grafting. Autogenous soft tissue grafting procedures are usually associated with a certain degree of morbidity. Collagen matrices could be used as an alternative to reduce morbidity and intra-operatory times. The aim of this study was to assess the efficacy of a xenogeneic collagen matrix as a substitute for soft tissue grafting around dental implants...
January 10, 2018: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/29314144/bone-augmentation-followed-by-implant-surgery-in-the-edentulous-mandible-a-systematic-review
#5
REVIEW
R J de Groot, M A E M Oomens, T Forouzanfar, E A J M Schulten
INTRODUCTION: Long-standing loss of natural teeth in the mandible can lead to severe jaw atrophy and even mandibular fracture. There is no consensus on the best preprosthetic surgical treatment to reconstruct the atrophic edentulous mandible. The purpose of this review is to provide an overview of the existing literature and to give an evidence-based recommendation for bone grafting and future research. MATERIALS AND METHODS: This systematic review was conducted according to the PRISMA statement...
January 4, 2018: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29306535/zoom-reconstruction-tool-evaluation-of-image-quality-and-influence-on-the-diagnosis-of-root-fracture
#6
Polyane Mazucatto Queiroz, Gustavo Machado Santaella, Ana Lúcia Alvares Capelozza, Pedro Luiz Rosalen, Deborah Queiroz Freitas, Francisco Haiter-Neto
INTRODUCTION: This study evaluated the image quality and the diagnosis of root fractures when using the Zoom Reconstruction tool (J Morita, Kyoto, Japan). METHODS: A utility wax phantom with a metal sample inside was used for objective evaluation, and a mandible with 27 single-rooted teeth (with and without obturation and with and without vertical or horizontal fractures) was used for diagnostic evaluation. The images were acquired in 3 protocols: protocol 1, field of view (FOV) of 4 × 4 cm and a voxel size of 0...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29290281/optimising-volumetric-arc-radiotherapy-for-dental-rehabilitation-in-oropharynx-cancer-a-retrospective-dosimetry-review-and-feasibility-planning-study
#7
Sean M O'Cathail, Naveen Karir, Ketan Shah
PURPOSE: To assess the dosimetry to dentally relevant substructures within the mandible/maxilla, establish the predictors of increased mean anterior mandible dose and assess the feasibility of rationale optimisation of dose to the anterior mandible (AM) volume to aid reconstructive dental surgery planning, where the AM is a critical structure. MATERIALS AND METHODS: In a cohort of radically treated oropharynx cancer patients we conducted a retrospective dosimetry analysis of mandible/maxilla volumes, created using a published atlas...
January 2018: Oral Oncology
https://www.readbyqxmd.com/read/29283939/rabdomyosarcoma-of-the-mandible-an-uncommon-clinical-presentation
#8
Cleverton Roberto de Andrade, Guilherme Dos Santos Trento, Fabiano Jeremias, Elisa Maria Aparecida Giro, Marisa Aparecida Cabrini Gabrielli, Mario Francisco Real Gabrielli, Oslei Paes de Almeida, Valfrido Antonio Pereira-Filho
Rhabdomyosarcoma (RMS) is the most common soft tissue sarcoma in children and adolescents. Most patients present with a mass in the head and neck region, urogenital region, or with distal extremity involvement. The authors describe a challenging case of a 6-year-old male patient presenting with mandibular RMS. The clinical/radiographic/tomographic evaluations classified the tumor as an advanced stage (stage IV), with a mass of 6.0 cm involving the left side of the mandible and parotid region. The biopsy revealed round, spindled, and pleomorphic cells with hyperchromatic nuclei and rare larger rhabdomyoblasts with eosinophilic cytoplasm...
December 27, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29275838/free-flap-surgery-in-europe-an-interdisciplinary-survey
#9
C Rendenbach, N Hölterhoff, S Hischke, K Kreutzer, R Smeets, A T Assaf, M Heiland, J Wikner
Free flap surgery is essential for the aesthetic and functional reconstruction of various parts of the body. The aim of this study was to compare current concepts of perioperative flap management between ENT, craniomaxillofacial, and plastic surgeons. A European survey was conducted among 570 surgical departments, covering all aspects of free flap surgery. Focus was placed on antibiotic and antithrombotic drug use, aspects of osseous reconstruction, and flap monitoring strategies. One hundred and seventy-two medical units participated...
December 21, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29275154/three-dimensional-growth-pattern-of-the-rat-mandible-revealed-by-periodic-live-micro-computed-tomography
#10
Hak-Jin Kim, Kyeong-Mee Park, Hye-Jin Tak, Ji Wook Choi, Sang-Hoon Kang, Wonse Park, Sang-Hwy Lee
OBJECTIVE: We wanted to evaluate the three-dimensional (3D) mandibular growth of Sprague-Dawley rats from 4th to 16th postnatal weeks with periodic and live micro-computed tomographic scanning. DESIGN: Twenty Sprague-Dawley rats were used for micro-CT scanning from 4th to 16th postnatal weeks. After 3D reconstruction of rat mandible, we performed the linear and angular measurements and the superimposition of the 3D models to evaluate the mandibular growth of rat...
December 16, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29274310/is-bone-morphogenetic-protein-2-as-effective-as-alveolar-distraction-osteogenesis-for-vertical-bone-regeneration
#11
Jose M Reuss, Joan Pi-Anfruns, Peter K Moy
PURPOSE: The aim of this study was to assess the clinical effectiveness of alveolar distraction osteogenesis (ADO) versus recombinant human bone morphogenetic protein-2 (rh-BMP-2) for vertical ridge augmentation. Few data have been published on vertical bone regeneration using rh-BMP-2. MATERIALS AND METHODS: The authors implemented a retrospective cohort study and enrolled a sample composed of patients with deficient alveolar vertical bone height. The primary predictor variable was vertical augmentation with BMP-2 and a titanium mesh or ADO...
November 29, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29274152/the-epidemiology-treatment-and-complication-of-ameloblastoma-in-east-indonesia-6-years-retrospective-study
#12
M Ruslin, F-N Hendra, A Vojdani, D Hardjosantoso, M Gazali, A Tajrin, J Wolff, T Forouzanfar
BACKGROUND: Ameloblastoma is a neoplasm classified as a benign epithelial odontogenic tumor of the jaws, grow slowly and are locally invasive. The aim of the present study was to investigate the incidence, treatment, and complication of patients with ameloblastoma in East-Indonesia during six years retrospective study. MATERIAL AND METHODS: This retrospective study included 84 patients who were diagnosed with ameloblastoma from 2011 to 2016. There were 56 patients with treatment data available...
December 23, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29260271/reconstruction-of-mandibular-contour-using-individualized-high-density-porous-polyethylene-medpor%C3%A2-implants-under-the-guidance-of-virtual-surgical-planning-and-3d-printed-surgical-templates
#13
Yu Wang, Yiqun Zhang, Zhen Zhang, Xiang Li, Jianwei Pan, Jihua Li
BACKGROUND: The mandibular contour plays a significant role in the beautiful and youthful look but the reconstruction remains a challenging problem. The objective of this study was to evaluate the use of individualized high-density porous polyethylene (Medpor®) implants for comprehensive reconstruction of mandibular contour with the aid of computer-aided design/computer-aided manufacturing (CAD/CAM). METHODS: From 2010 to 2014, 12 patients with mandibular contour deformities were enrolled in our retrospective study...
December 19, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/29231055/effect-of-anatomical-region-on-the-formation-of-metal-artifacts-produced-by-dental-implants-in-cone-beam-computed-tomographic-images
#14
Alessiana Helena Machado, Karolina Aparecida Castilho Fardim, Camila Furtado de Souza, Bruno Salles Sotto-Maior, Neuza Maria Souza Picorelli Assis, Karina Lopes Devito
OBJECTIVES: To quantitatively compare metal artifacts produced by implants in different maxillomandibular regions on cone beam computed tomography (CBCT) images. METHODS: A total of 200 implants selected from CBCT examinations were divided into four groups: Group 1 (n = 50) - implants located in the anterior maxilla; Group 2 (n = 50) - implants located in the posterior maxilla; Group 3 (n = 50) - implants located in the anterior mandible; and Group 4 (n = 50) - implants located in the posterior mandible...
December 12, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29223639/extensive-phenotyping-of-the-orofacial-and-dental-complex-in-crouzon-syndrome
#15
Alexander Khominsky, Robin Yong, Sarbin Ranjitkar, Grant Townsend, Peter J Anderson
OBJECTIVES: Fibroblast growth factor receptor 2 (FGFR2) C342Y/+ mutation is a known cause of Crouzon syndrome that is characterised by craniosynostosis and midfacial hypoplasia. Our aim was to conduct extensive phenotyping of the maxillary, mandibular and dental morphology associated with this mutation. MATERIALS AND METHODS: Morphometric data were obtained from 40 mice, representing two genotypes (Crouzon and wild-type) and two sexes (males and females) (n=10 in each group)...
October 27, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29215451/mandibular-reconstruction-using-a-customized-three-dimensional-titanium-implant-applied-on-the-lingual-surface-of-the-mandible
#16
You-Young Jo, Seong-Gon Kim, Min-Keun Kim, Sung-Ho Shin, Janghoon Ahn, Hyun Seok
A patient had a right mandibular defect due to resection of an ameloblastoma. Previously, the defect had been reconstructed by an iliac bone graft, and subsequently, a titanium mesh with xenograft was used. However, it was not successfully reconstructed. For the recovery of mandible continuity and rehabilitation of jaw movement, we manufactured a customized 3-dimensional titanium implant by computer-aided design and manufacturing and electron beam melting technology. This implant was designed to have a porous body structure and lingual plate...
December 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29201970/comparison-of-the-marginal-bone-loss-in-one-stage-versus-two-stage-implant-surgery
#17
Rasoul Gheisari, Hesamuddin Eatemadi, Akram Alavian
Statement of the Problem: Dental implant is one of the best choices for reconstruction of aesthetic and function. High success rate of these treatments are related to some considerations such as case selection, implant system selection and surgical methods. One-stage or two-stage surgical approaches are routine surgical methods in dental implant treatments. The minimum rate of bone loss around fixtures is the most important criteria for evaluation of implant treatment success that can be affected by different methods of surgery...
December 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29194937/age-related-new-bone-formation-following-the-use-of-cancellous-bone-block-allografts-for-reconstruction-of-atrophic-alveolar-ridges
#18
Joseph Nissan, Roni Kolerman, Liat Chaushu, Marilena Vered, Sarit Naishlos, Gavriel Chaushu
BACKGROUND: An age-related decrease in the number of osteogenic progenitor cells may compromise bone augmentation. PURPOSE: Histomorphometrical assessment of age-related new bone formation, following atrophic alveolar ridge reconstruction, using cancellous bone-block allografts. MATERIAL AND METHODS: Ninety-three consecutive patients (58 females and 35 males) were referred for implant-supported restoration of 122 severe atrophic alveolar ridges...
December 1, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29194275/preoperative-exposure-of-sigmoid-sinus-trajectory-in-posterolateral-cranial-base-approaches-using-a-new-landmark-through-a-neurosurgical-perspective
#19
Ihsan Doğan, Onur Özgüral, Ümit Eroğlu, Eyyub S M Al-Beyati, Cemil M Kilinç, Ayhan Cömert, Hasan Çağlar Uğur
The location of burr holes in posterolateral cranial base approaches should be appropriate to provide an adequate operative field, and surgical freedom is crucial for bone window opening. The aim of this study was to search for more convenient and easily detectable landmarks in comparison with current landmarks in posterolateral cranial base surgery. Twenty 3-dimensional reconstructed head and neck computed tomography angiography images (group 1) and 20 cadaver heads (group 2) were evaluated. An imaginary line connecting the angle of the mandible and the mastoid tip was extended upward...
November 20, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29188648/-application-of-bone-grafts-from-chin-of-the-mandible-in-the-reconstruction-of-orbital-fracture
#20
Li Xiaoyu, Wu Jing, Du Xinya, Huang Jian, Wu Bin, Xie Chun
OBJECTIVE: To evaluate the clinical effects of bone graft from the mandible in repairing orbital floor defects. METHODS: Bone grafts from the mandible were used to treat 11 cases of orbital floor defects and followed up for 6-12 months. RESULTS: The surgical incisions healed primarily in all 11 patients. The orbital floor structure was restored. No vision loss, limited eye movement, implant infection, or resorption were observed postoperatively, and no complications occurred in the supply area...
October 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
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