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Mandible reconstruction

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https://www.readbyqxmd.com/read/28927926/short-dental-implants-a-scoping-review-of-the-literature-for-patients-with-head-and-neck-cancer
#1
REVIEW
Faraj Edher, Caroline T Nguyen
STATEMENT OF PROBLEM: Dental implants can be essential in the rehabilitation of various cancer defects, but their ideal placement can be complicated by the limited dimensions of the available host bone. Surgical interventions developed to increase the amount of bone are not all predictable or successful and can sometimes be contraindicated. Short dental implants have been suggested as an alternative option in sites where longer implants are not possible. Whether they provide a successful treatment option is unclear...
September 16, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28922244/fibular-graft-effective-panorama-for-prosthetic-rehabilitation-of-resected-mandible
#2
Pankaj Kharade, Saidul Islam, Mahesh Verma, Swati Sharma, Ranjeet Bodh
Surgical management of extensive tumors in the mandibular region leads to massive disfigurement of the face. Also the prosthetic outcome of such patients rehabilitated with free soft tissue flaps is very poor. Reconstruction of extensive defects to overcome the disfigurement is a challenging procedure and can be achieved with free fibula flap. Free fibula graft provides sufficient length of bone for the reconstruction of the postsurgical defects. Excellent vascularity of fibula flap allows for easy uptake of the graft and osseointegration of the dental implants...
September 15, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28906331/mandibular-surgical-navigation-an-innovative-guiding-method
#3
Vincenzo Abbate, Giovanni Dell' Aversana Orabona, Domenico Solari, Paola Bonavolontà, Giorgio Iaconetta, Luigi Califano
Mandibular osteotomies are usually required to treat craniomaxillofacial disorders. Losses of mandibular continuity result in esthetic and functional deficiency. During the past 30 years, the spread of the computer-assisted surgery techniques, rapid prototyping, and surgical navigation technique has improved the reliability and the outcomes of mandibular resections and reconstructions, by providing realtime feedback to surgeon. Recent studies reported the feasibility and the precision of surgical navigation applied to mandibular surgical resection and reconstruction with fibula flap but none of them describes a method to navigate the jaw allowing its full motility during the operation...
September 12, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28894727/flap-necrosis-after-palatoplasty-in-irradiated-patient-and-its-reconstruction-with-tunnelized-facial-artery-myomucosal-island-flap
#4
Hye-In Jeong, Hye-Min Cho, Jongyeol Park, Yong Hoon Cha, Hyung Jun Kim, Woong Nam
BACKGROUND: Tunneled transposition of the facial artery myomucosal (FAMM) island flap on the lingual side of the mandible has been reported for intraoral as well as oropharyngeal reconstruction. This modified technique overcomes the limitations of short range and dentition and further confirms the flexibility of the flap. This paper presents a case of reconstructing secondary soft palatal defect due to flap necrosis following two-flap palatoplasty in irradiated patient with lingually transposed facial artery myomucosal island flap...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28894659/prevention-of-mandible-reconstruction-plate-exposure-by-costal-cartilage-wrapping
#5
Motonao Iwasawa, Yoshito Mishima, Miho Ohtsubo
After mandibulectomy in cancer surgery, reconstruction is often performed with a reconstruction plate covered with a soft-tissue free flap in patients in poor condition. However, the rate of complications for mandibular reconstruction is higher with a reconstruction plate than with vascularized bone grafts. We have developed a costal cartilage wrapping method to prevent exposure of the mandible reconstruction plate. The eighth costal cartilage was removed and split into 2 pieces to wrap around the reconstruction plate...
August 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28882499/secondary-surgical-management-of-osteoradionecrosis-using-three-dimensional-isodose-curve-visualization-a-report-of-three-cases
#6
J Kraeima, R J H M Steenbakkers, F K L Spijkervet, J L N Roodenburg, M J H Witjes
Osteoradionecrosis is defined as bone death secondary to radiotherapy. There is a relationship between the radiation dose received and the occurrence of osteoradionecrosis of the jaws, with the risk increasing above a dose of 60Gy. In cases of class III mandibular osteoradionecrosis, a segmental resection can be indicated. Current practice is to completely remove the affected bone up to the point where the bone looks healthy and is bleeding. Exact resection planning and the use of guided surgery based on imaging of the bone changes have not been reported so far...
September 4, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28863859/grafting-materials-for-alveolar-cleft-reconstruction-a-systematic-review-and-best-evidence-synthesis
#7
REVIEW
C Wu, W Pan, C Feng, Z Su, Z Duan, Q Zheng, C Hua, C Li
The purpose of this study was to compare the efficacy of alveolar bone reconstruction for alveolar cleft patients performed with the traditional iliac graft or alternative/supplementary bone grafting materials. Electronic databases, relevant journals, and reference lists of the included studies were searched to the end of June 2016. A best-evidence synthesis was performed to draw conclusions. A total of 38 studies were included, which provided 25 pieces of evidence: seven of moderate evidence and 18 of insufficient evidence...
August 29, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28855872/a-novel-method-to-detect-3d-mandibular-changes-related-to-soft-diet-feeding
#8
Kana Kono, Chihiro Tanikawa, Takeshi Yanagita, Hiroshi Kamioka, Takashi Yamashiro
Craniofacial morphology varies among individuals, which is regulated by the interaction between genes and the environment. Soft-diet feeding is a widely-used experimental model for studying the association between the skeletal morphology and muscle-related loading on the bone. Traditionally, these studies have been based on linear and angular measurements provided on two-dimensional (2D) radiographs in the lateral view. However, 2D observation is based on simplification of the anatomical structures and cannot detect three-dimensional (3D) changes in detail...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28841384/rehabilitation-with-an-implant-supported-metal-acrylic-fixed-prosthesis-after-ameloblastoma-resection-in-mandible-clinical-case-letter
#9
Julide Ozen, Behcet Erol, Sibel Dikicier, Gulce Alp
The majority of patients often have functional problems after undergoing jaw reconstruction. These patients require intense rehabilitation, including surgical and prosthodontic procedures to maximize function, esthetics, and to preserve mastication, speech, and appearance. This clinical report describes the rehabilitation of a patient who had a large tumor resection of ameloblastoma of the mandible resulting in hard and soft tissue deficiency. The mandible was reconstructed with an iliac bone graft with simultaneous tumor removal...
August 25, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28838835/biomechanical-evaluation-of-a-novel-hybrid-reconstruction-plate-for-mandible-segmental-defects-a-finite-element-analysis-and-fatigue-testing
#10
Cheng-Hsien Wu, Yang-Sung Lin, Yu-Shen Liu, Chun-Li Lin
PURPOSE: This study develops a novel hybrid (NH) reconstruction plate that can provide load-bearing strength, secure the bone transplant at the prosthesis favored position, and also maintain the facial contour in a mandibular segmental defect. A new patient-match bending technique which uses a three-dimensional printing (3DP) stamping process is developed to increase the interfacial fit between the reconstruction plate and mandibular bone. MATERIALS AND METHODS: The NH reconstruction plate was designed to produce a continuous profile with non-uniform thickness and triangular cross-screw patterns with a locking-screw feature at the plate base...
July 27, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28834834/three-dimensional-analysis-of-midfacial-soft-tissue-changes-after-maxillary-posterior-impaction-and-intraoral-vertical-ramus-osteotomy-for-mandibular-setback-in-class-iii-patients
#11
Seung-Won Seo, Young-Soo Jung, Hyoung-Seon Baik
This study investigated the correlation between the 3-dimensional changes in midfacial soft tissues, including the parasagittal area and maxilla-mandible complex, after Le Fort I maxillary posterior impaction and bilateral intraoral vertical ramus osteotomy (B-IVRO), using cone-beam computed tomography (CBCT). This retrospective study included 22 skeletal Class III patients (6 men and 16 women; mean age 21.6 years) who underwent orthognathic surgery. Three-dimensional CBCT images taken before and 1 year after surgery were superimposed based on the cranial base...
August 22, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28826759/condylar-positions-before-and-after-bilateral-mandibular-distraction-osteogenesis-in-children-with-pierre-robin-sequence
#12
J Liu, Y Chen, F Li, W Wu, J Hao, D Luo, H Wang
This study aimed to analyze the changes in mandibular morphology after bilateral mandibular distraction osteogenesis (BMDO) in children with Pierre Robin sequence. The positions of the condyles were analyzed in reconstructed three-dimensional craniomaxillofacial images obtained for 18 children before and 8-12 weeks after BMDO. Differences between pre- and postoperative parameters were assessed using paired t-tests. After surgery, a significant decrease in superior joint space was detected (P<0.05), but no change in anterior joint space or posterior joint space was observed...
August 18, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28803739/two-stage-reconstruction-of-the-severely-deficient-alveolar-ridge-bone-graft-followed-by-alveolar-distraction-osteogenesis
#13
A Rachmiel, O Emodi, D Aizenbud, D Rachmiel, D Shilo
Distraction osteogenesis for the augmentation of severe alveolar bone deficiency has gained popularity during the past two decades. In cases where the vertical bone height is not sufficient to create a stable transport segment, performing alveolar distraction osteogenesis (ADO) is not possible. In these severe cases, a two-stage treatment protocol is suggested: onlay bone grafting followed by ADO. An iliac crest onlay bone graft followed by ADO was performed in 13 patients: seven in the mandible and six in the maxilla...
August 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28796099/radiotherapy-and-smoking-history-are-significant-independent-predictors-for-osteosynthesis-associated-late-complications-in-vascular-free-fibula-reconstruction-of-mandible
#14
YiMing Chen, JiaLing Wu, Sandhya Gokavarapu, Qingcheng Shen, Tong Ji
BACKGROUND: The vascular fibula flap is an ideal choice for function and appearance reconstruction of mandible. Despite the high success rate, "late complications" such as Ti plate exposure and local infection related to osteosynthesis are not uncommon. PATIENTS AND METHOD: A retrospective cohort of patients who received vascular fibula reconstruction for mandible from January 2011 to December 2013 from the Department of Oral and Maxillofacial Oncology in a tertiary hospital were charted: clinical, pathological, and therapeutic factors were analyzed for late complications in univariate and multivariate analyses...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28765185/a-delayed-presentation-of-ameloblastic-fibrosarcoma-in-an-african-patient
#15
Nkhensani Yvonne Chauke, Chrysis Sofianos, Dimitri Liakos, Elias Ndobe
A 24-year-old womanpresented with ameloblastic fibrosarcoma arising from ameloblastic fibroma. The delayed presentation accounted for the extensive destruction of the mandible and complete occlusion of her oral cavity. This resulted in an inability to eat and maintain oral hygiene. A multidisciplinary team management approach involved nutritional optimisation, segmental mandibulectomy, reconstruction with a reconstructive plate and a free anterolateral thigh flap to line the the floor of mouth. Functional and aesthetic outcome was acceptable, and the patient is planned for secondary free fibular flap bony reconstruction...
August 1, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28764951/reconstruction-of-the-bony-chin-using-sagittal-split-osteotomies-of-the-remaining-mandible-a-new-technique-for-a-special-indication-case-report
#16
Berthold H Hell
There are several indications for resecting the bony chin, such as squamous cell carcinoma, sarcoma, or benign tumors of the jaw such as ameloblastoma. Several techniques for reconstruction of the bony chin, such as the use of metal plates and also revascularized free bone grafts of the iliac crest, fibula, or scapula, are common. In the case of poor vascular supply, however, alternative techniques may be necessary. In this report, a new technique is described using pedicled bone flaps from both sagittally split mandibular stumps following chin resection...
September 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28762869/endocultivation-of-scaffolds-with-rhbmp-2-and-vegf165-in-the-omentum-majus-in-a-rabbit-model
#17
Falk Birkenfeld, Andre Sengebusch, Chiara Voelschow, Hendrik Naujokat, Björn Möller, Henning Wieker, Joerg Wiltfang
The reconstruction of defects in the mandible are still challenging. Despite several adequate microvascular bone reconstruction techniques there is a need for ectopic bone endocultivation without drawbacks by donor site morbidity. The omentum majus is described as a good vascularized fleece with undifferentiated cells with potential for bone culturing. In the omentum majus of six rabbits two hydroxyapatite blocks were incorporated for 12 weeks each. The blocks were prepared with rhBMP-2 or VEGF165+rhBMP-2 and wrapped into the omentum...
August 1, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28749839/angle-to-angle-mandibular-defect-reconstruction-with-fibula-flap-by-using-a-mandibular-fixation-device-and-surgical-navigation
#18
Shi-Yue Shen, Yao Yu, Wen-Bo Zhang, Xiao-Jing Liu, Xin Peng
PURPOSE: Although free fibula flaps are widely used for mandibular reconstruction, 3-dimensional (3D) position is difficult to control in angle-to-angle mandibular defects. The present study describes a revised approach for angle-to-angle mandibular reconstruction with fibula flaps by using mandibular fixation device and surgical navigation. METHODS: Preoperative maxillofacial and fibular computed tomography (CT) scans were acquired, and CT data were imported into ProPlan CMF software...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28749837/occlusion-guided-double-barreled-fibular-osteoseptocutaneous-free-flap-for-refined-mandibular-reconstruction-aided-by-virtual-surgical-planning
#19
Xingzhou Qu, Mingyi Wang, Liqun Xu, Jiannan Liu, Shizhu Bai, Chenping Zhang
BACKGROUND: There were many articles about double-barreled fibular flap for mandibular reconstruction. The upper layer bone was suit for implant placement as a new alveolar. The lower layer was necessary for contour. But the accurate relationship between the 2 layers bone was rarely reported. OBJECTIVES: The purpose of this study was twofold: to evaluate the feasibility of the novel design of the double-barreled fibular flap from virtual surgery to actual result; to evaluate the accuracy and results of occlusion-guided double-barreled fibular free flap in mandible reconstruction...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28746288/using-a-second-free-fibula-osteocutaneous-flap-after-repeated-mandibulectomy-is-associated-with-a-low-complication-rate-and-acceptable-functional-outcomes
#20
Alexander F Mericli, Mark V Schaverien, Matthew M Hanasono, Peirong Yu, Rene D Largo, Mark T Villa, Greg Reece, Charles E Butler, Patrick B Garvey
BACKGROUND: A significant percentage of patients who undergo segmental mandibulectomy for head and neck cancer will develop a new or recurrent cancer or osteoradionecrosis, necessitating a second mandibulectomy and reconstruction. In this scenario, many surgeons are reluctant to perform a reconstruction with an osseous flap because of the presumed increased morbidity and complexity. The purpose of this study was to evaluate the safety and efficacy of performing a second free fibula flap reconstruction after repeated segmental mandibulectomy...
August 2017: Plastic and Reconstructive Surgery
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