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Reconstruction of mandible

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https://www.readbyqxmd.com/read/29778637/total-mandibulectomy-defect-in-the-setting-of-chronic-bisphosphonate-use
#1
Ameya A Jategaonkar, Arvind K Badhey, Fiyin Sokoya, Sameep Kadakia, Steven Mudrovich, Yadranko Ducic
Bisphosphonates are among several drugs known in modern medicine to have a potentially deleterious effect on the mandible with chronic use. While purportedly causing a necrotic reaction in the bone, the complete mechanism is not fully elucidated yet as cases are quite rare in the general public. Despite the esoteric nature of this entity, patients suffering from bisphosphonate induced necrosis have a complicated and prolonged course often involving varying degrees of mandibular debridement with severe cases requiring reconstruction...
May 16, 2018: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/29772033/passivity-of-fit-of-a-novel-prefabricated-implant-supported-mandibular-full-arch-reconstruction-a-comparative-in-vitro-study
#2
Matthias Karl, Roberto Carretta, Kenji W Higuchi
PURPOSE: To quantify the strain development of a new prefabricated implant-supported mandibular full-arch reconstruction. MATERIALS AND METHODS: Five resin models reflecting edentulous mandibles were each restored with three interforaminal implants and prefabricated frameworks with a novel compensation mechanism, cast frameworks, and computer-aided design/computer-assisted manufacturing (CAD/CAM)-fabricated frameworks. Strains were recorded during superstructure fixation...
May 17, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29751943/new-method-of-alloplastic-reconstruction-of-the-mandible-after-subtotal-mandibulectomy-for-medication-related-osteonecrosis-of-the-jaw
#3
C Bräuer, G Lauer, H Leonhardt
No abstract text is available yet for this article.
May 8, 2018: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29716816/patient-specific-pre-contouring-of-osteosynthesis-plates-for-mandibular-reconstruction-using-a-three-dimensional-key-printed-solution
#4
J Kraeima, H H Glas, M J H Witjes, K P Schepman
PURPOSE: In mandibular reconstructive surgery, the osteosynthesis plates require contouring according to the patients' individual anatomical situation. These plates are frequently contoured around a three-dimensional (3D) printed model. However, the translation to the actual patient can introduce inaccuracies and unwanted rotations in the condyles and mandibular ramus, due to malpositioning of the pre-contoured plate. MATERIALS AND METHODS: This article describes an easy-access method for exact translation of the pre-contoured plate to the patient's mandible...
April 6, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29716749/new-technique-for-endoscopically-assisted-particulate-graft-reconstruction-of-the-mandible
#5
C Ferretti, J Reyneke, M Heliotis, U Ripamonti
The reconstruction of mandibular defects using particulate grafts is a proven technique that restores the osseous anatomy effectively. Secondary osseous reconstruction can be accomplished with endoscopic assistance and reduced-access incisions if an intermediate spacer is placed during resection. Two patients required reconstruction after resection of mandibular ameloblastomas. We used a modified protocol that involved the implantation of a graft of particulate corticocancellous bone after removal of the spacer, and prepared the recipient site under endoscopic guidance with small extraoral incisions...
April 28, 2018: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29713435/three-dimensional-finite-element-analysis-of-the-splinted-implant-prosthesis-in-a-reconstructed-mandible
#6
Kyung-Hoi Heo, Young-Jun Lim, Myung-Joo Kim, Ho-Beom Kwon
PURPOSE: The purpose of this study was to analyze the effects of the splinted implant prosthesis in a reconstructed mandible using three-dimensional finite element analysis. MATERIALS AND METHODS: Three-dimensional finite element models were generated from a patient's computed tomography data. The patient had undergone partial resection of the mandible that covered the area from the left canine to the right condyle. The mandible was reconstructed using a fibula bone graft and dental implants...
April 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29706216/three-dimensional-computed-tomography-analysis-of-mandibular-morphology-in-patients-with-facial-asymmetry-and-mandibular-retrognathism
#7
Kug-Ho You, Kyung-Ho Kim, Kee-Joon Lee, Hyoung-Seon Baik
INTRODUCTION: The purpose of this study was to analyze the morphologic features of skeletal units in the mandibles of patients with facial asymmetry and mandibular retrognathism using cone-beam computed tomography. METHODS: The subjects consisted of 50 adults with facial asymmetry and mandibular retrognathism, divided into the symmetry group (n = 25) and the asymmetry group (n = 25) according to the degree of menton deviation. Three-dimensional computed tomography scans were obtained with cone beam computed tomography...
May 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29697631/facial-fractures-pearls-and-perspectives
#8
Obaid Chaudhry, Matthew Isakson, Adam Franklin, Suhair Maqusi, Christian El Amm
LEARNING OBJECTIVES: After studying this article, the participant should be able to: 1. Describe the A-frame configuration of anterior facial buttresses, recognize the importance of restoring anterior projection in frontal sinus fractures, and describe an alternative design and donor site of pericranial flaps in frontal sinus fractures. 2. Describe the symptoms and cause of pseudo-Brown syndrome, describe the anatomy and placement of a buttress-spanning plate in nasoorbitoethmoid fractures, and identify appropriate nasal support alternatives for nasoorbitoethmoid fractures...
May 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29696412/characterization-of-the-perinatal-mandible-growth-pattern-preliminary-results
#9
F Remy, Y Godio-Raboutet, E Verna, G Gorincour, P Bonnaure, P Adalian, L Guyot, L Thollon
PURPOSE: The fetal development of the mandible is nowadays quite understood, and it is already known that craniofacial growth reaches its highest rate during the first 5 years of postnatal life. However, there are very few data focusing on the perinatal period. Thus, the present article is addressing this concern by studying the mandible morphology and its evolution around the birth with a morphometric method. METHODS: Thirty-one mandibles modelled in three dimensions from post-mortem CT-scans were analyzed...
April 25, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29680849/virtual-planning-and-3d-printing-modeling-for-mandibular-reconstruction-with-fibula-free-flap
#10
W Ren, L Gao, S Li, C Chen, F Li, Q Wang, Y Zhi, J Song, Z Dou, L Xue, K Zhi
BACKGROUND: This study was to evaluate the use of virtual planning and 3D printing modeling in mandibular reconstruction and compare the operation time and surgical outcome of this technique with conventional method. MATERIAL AND METHODS: Between 2014 and 2017, 15 patients underwent vascularized fibula flap mandibular reconstruction using virtual planning and 3D printing modeling. Titanium plates were pre-bent using the models and cutting guides were used for osteotomies...
April 22, 2018: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29679503/prosthetic-rehabilitation-of-patients-with-hypohidrotic-ectodermal-dysplasia-a-systematic-review
#11
REVIEW
Dagmar Schnabl, Ingrid Grunert, Matthias Schmuth, Ines Kapferer-Seebacher
BACKGROUND: Hypohidrotic ectodermal dysplasia (HED) comprises a large group of inherited disorders of ectodermal structures, characterized by hypo-/anhidrosis, hypotrichosis and hypo-/oligo-/anodontia. OBJECTIVE: We aimed to systematically assess the spectrum of prosthodontic approaches with regard to the patients' age and to provide clinical implications for practicing dentists. METHODS: An electronic and manual search was conducted in four databases (Medline, LIVIVO, Cochrane Library, Web of Science Core Collection)...
April 21, 2018: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29627200/computer-assisted-resection-and-reconstruction-of-bilateral-osteoradionecrosis-of-the-mandible-using-2-separate-flaps-prepared-from-a-single-fibula
#12
Rui Chen, Han-Qing Zhang, Zi-Xian Huang, Shi-Hao Li, Da-Ming Zhang, Zhi-Quan Huang
OBJECTIVES: Osteoradionecrosis of the mandible is a late radiation-induced complication, which is a major concern in survivors of head and neck cancer. STUDY DESIGN: In this study, we present a case of a patient with nasopharyngeal carcinoma who developed extensive bilateral osteoradionecrosis of the ascending ramus of the mandible. After preoperative virtual surgical planning, the obtained data were used to fabricate patient-specific cutting templates. The bilateral mandibular defects were reconstructed using 2 separate flaps prepared from a single fibula...
March 7, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29627149/combined-bilobed-trapezius-myocutaneous-and-scapula-osteomyocutaneous-flaps-for-the-restoration-of-through-and-through-defects-of-the-mandible-following-salvage-surgery-for-recurrent-head-and-neck-tumours
#13
W-L Chen, Z-Q Huang, B Zhou, Y Wang, R Chen
This study was performed to evaluate the outcomes of combined bilobed trapezius myocutaneous and scapula osteomyocutaneous flaps for the restoration of through-and-through defects of the mandible. The subjects were six patients with recurrent malignant tumours who underwent salvage surgeries and reconstruction with combined flaps based on the transverse cervical vessels (TCVs). All patients had combined bone (four type H, one type LCL, and one type C) and extensive soft tissue defects (through-and-through defects) following salvage surgery...
April 4, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29622289/continuity-defects-of-the-mandible-comparison-of-three-techniques-for-osseous-reconstruction-and-their-impact-on-implant-loading
#14
Yunus Okcu, Jan Rustemeyer
Computer-aided design/manufacturing (CAD/CAM) is now widely used, but whether it can help to overcome complications in mandibular reconstruction and accelerate dental implantation is still a matter for debate. Therefore, we aimed to evaluate the benefits of this technique using vascularized iliac crest or fibula flaps in mandibular reconstruction, with respect to the time between reconstruction and implantation, and the ratio of planned to inserted implants. We reviewed retrospectively the records of 54 patients who underwent mandibular reconstructions between 2012 and 2016, and included in our study the last 10 cases representing each of the following groups: iliac crest flap with CAD/CAM (Group 1); fibula flap with CAD/CAM (Group 2); and fibula flap without CAD/CAM (Group 3)...
March 9, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29621078/a-patient-with-severe-lower-face-degloving-injury
#15
Ivo Cavalcante Pita Neto, Jéferson Martins Pereira Lucena Franco, Eduardo Chaves Moreno, Pablo Pita, Francisco Aurelio Lucchesi Sandrini, David Gomes de Alencar Gondim
Avulsions of mandible are among the most devastating lesions observed in cranio-maxillofacial traumas. They present an important health problem because of the high risk of morbidity related to deformities that cause functional limitations and esthetic changes. The avulsions commonly result from high-energy effects, which cause complete or partial separation of the mandibular bone of the face. As a result of the intense aggression, the skin and subcutaneous tissues of the bone are usually removed, affecting muscles, fascia, blood vessels, and the surrounding nerves...
April 4, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29609866/biomechanical-analysis-of-bone-remodeling-following-mandibular-reconstruction-using-fibula-free-flap
#16
Nobuhiro Yoda, Keke Zheng, Junning Chen, Zhipeng Liao, Shigeto Koyama, Christopher Peck, Michael Swain, Keiichi Sasaki, Qing Li
Whilst the newly established biomechanical conditions following mandibular reconstruction using fibula free flap can be a critical determinant for achieving favorable bone union, little has been known about their association in a time-dependent fashion. This study evaluated the bone healing/remodeling activity in reconstructed mandible and its influence on jaw biomechanics using CT data, and further quantified their correlation with mechanobiological responses through an in-silico approach. A 66-year-old male patient received mandibular reconstruction was studied...
March 30, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29599597/prosthetic-rehabilitation-of-hemimandibulectomy-defect-with-removable-partial-denture-prosthesis-using-an-attachment-retained-guiding-flange
#17
Sangeeta J Nair, I N Aparna, B Dhanasekar, Nayana Prabhu
The restoration of normal function and esthetics is often challenging in the prosthetic rehabilitation of patients with hemimandibulectomy defects due to unstable occlusion and mandibular deviation. The extensive period of time for completion of healing of the reconstructed mandible through reconstructive plastic surgery and/or implant-assisted prosthesis may compromise the masticatory function by causing delay in the fabrication of definitive prosthesis. This case report describes a novel technique for the construction of customized attachment-retained mandibular guiding flange prosthesis for immediate rectification of the frontal plane rotation occurring after hemimandibulectomy...
January 2018: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29581806/accuracy-of-three-dimensional-planning-in-surgery-first-orthognathic-surgery-planning-versus-outcome
#18
Ngoc Hieu Tran, Syrina Tantidhnazet, Somchart Raocharernporn, Sirichai Kiattavornchareon, Verasak Pairuchvej, Natthamet Wongsirichat
Background: The benefit of computer-assisted planning in orthognathic surgery (OGS) has been extensively documented over the last decade. This study aimed to evaluate the accuracy of three-dimensional (3D) virtual planning in surgery-first OGS. Methods: Fifteen patients with skeletal class III malocclusion who underwent bimaxillary OGS with surgery-first approach were included. A composite skull model was reconstructed using data from cone-beam computed tomography and stereolithography from a scanned dental cast...
May 2018: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/29574815/reconstruction-of-major-defects-of-the-jaws
#19
M D Batstone
Prosthetic replacements in the 19th and early 20th century were superseded by pedicled flaps and obturators. These have subsequently been superseded by free tissue transfer which currently is the mainstay of reconstructive jaw surgery. Although malignant and benign processes of the jaws are the predominant cause of segmental defects, a significant proportion still occurs due to trauma, or even iatrogenic causes such as radiotherapy. The varied aetiologies demand a nuanced approach to reconstruction and although the techniques remain similar the timing can be quite different...
March 2018: Australian Dental Journal
https://www.readbyqxmd.com/read/29570530/the-flap-suture-anchoring-technique-for-safe-oral-floor-reconstruction-with-preservation-of-alveolar-process
#20
Wei Wu, Yaowu Yang, Pu Zhang, Moyi Sun
Flaps-based microsurgery is routinely applied to reconstruct oral floor defects caused by oncologic resection. To prevent orocutaneous fistulae, flaps are frequently sutured with buccal vestibule mucosa after sacrificing the alveolar process. The patients suffered denture loss and irreversible structural damage. For reliable oral floor reconstruction with preservation of alveolar process, the authors introduced the flap "suture anchoring" technique. Oral floor, hemiglossal-oral floor, and tongue base-parapharyngeal wall-oral floor defects were included in this study...
March 22, 2018: Journal of Craniofacial Surgery
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