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Mandibular reconstruction

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https://www.readbyqxmd.com/read/29781765/individualized-titanium-mesh-combined-with-platelet-rich-fibrin-and-deproteinized-bovine-bone-a-new-approach-for-challenging-augmentation
#1
Jonas Lorenz, Sarah Al-Maawi, Robert Sader, Shahram Ghanaati
Autologous bone transfer is regarded as the gold standard for ridge augmentation before dental implantation, especially in severe bony defects caused by tumor resection or atrophy. In addition to the advantages of autologous bone, transplantation has several disadvantages, such as secondary operation, increased morbidity and pain. The present study reports, for the first time, a combination of a xenogeneic bone substitute (BO) with platelet-rich fibrin (PRF), which is a fully autologous blood concentrate derived from the patient's own peripheral blood by centrifugation...
May 21, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29778637/total-mandibulectomy-defect-in-the-setting-of-chronic-bisphosphonate-use
#2
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/29777779/bilateral-total-mandibular-reconstruction-with-patient-specific-implants-for-temporomandibular-joint-ankylosis
#3
Jorge Chaurand
Temporomandibular joint (TMJ) ankylosis is a complex entity that requires accurate diagnosis and prompt treatment. Multiple surgical modalities have been proposed to treat TMJ ankylosis, including gap arthroplasty, interpositional arthroplasty, and total joint reconstruction. This article is to report one treated with patient specific implants due to its complexity, technical considerations are presented and could be an option for patients with similar conditions requiring this type of complicated treatment...
May 16, 2018: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29776771/association-between-pain-severity-and-clinicohistopathologic-findings-in-the-mandibular-canal-and-inferior-alveolar-nerve-of-patients-with-advanced-mandibular-osteoradionecrosis
#4
Yujiro Hiraoka, Masaya Akashi, Satoshi Wanifuchi, Junya Kusumoto, Manabu Shigeoka, Takumi Hasegawa, Kazunobu Hashikawa, Hiroto Terashi, Takahide Komori
OBJECTIVE: Pain is one of the most problematic symptoms in patients with osteoradionecrosis of the jaws. This study investigated the associations between pain severity and morphologic alterations of the mandibular canal and inferior alveolar nerve, in respective computerized tomography images and resected specimens of mandibular osteoradionecrosis. STUDY DESIGN: We assessed 14 lesions in 13 patients who underwent segmental mandibulectomy for surgical debridement and simultaneous reconstruction with free fibula flap (1 patient exhibited bilateral lesions)...
April 16, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29772033/passivity-of-fit-of-a-novel-prefabricated-implant-supported-mandibular-full-arch-reconstruction-a-comparative-in-vitro-study
#5
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/29762448/pectoralis-major-musculocutaneous-flap-with-a-midline-sternal-skin-paddle-for-head-and-neck-reconstruction-a-new-design
#6
Jeongseok Oh, Hee Chang Ahn, Seungki Youn, Kyung Tae
PURPOSE: The pectoralis major musculocutaneous (PMMC) flap is a classic flap for head and neck reconstruction, relatively unpopular with the advancement of microsurgery and free flaps. The classic parasternal paddle design provided a thick flap with a small rotation arch leaving objectionable scarring. Our new symmetric midsternal design overcomes these problems. METHODS: Chart review was done from the years 2000 to 2017. Flap skin paddle was placed symmetrically on both sides of the midsternal line...
May 14, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29762319/comparison-of-bone-grafts-from-various-donor-sites-in-human-bone-specimens
#7
Mohammad Kamal, Felix Gremse, Stefanie Rosenhain, Alexander K Bartella, Frank Hölzle, Peter Kessler, Bernd Lethaus
The objective of the current study was to compare the three-dimensional (3D) morphometric microstructure in human cadaveric bone specimens taken from various commonly utilized donor sites for autogenous bone grafting. Autogenous bone grafts can be harvested from various anatomic sites and express heterogeneous bone quality with a specific 3D microstructure for each site. The long-term structural integrity and susceptibility to resorption of the graft depend on the selected donor bone. Micro-computed tomography generates high-resolution datasets of bone structures and calcifications making this modality versatile for microarchitecture analysis and quantification of the bone...
May 14, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29761514/mandibular-reconstruction-in-elderly-patients
#8
Shimpei Miyamoto, Takuya Higashino, Minoru Sakuraba
BACKGROUND AND OBJECTIVES: The choice of reconstructive technique for a segmental mandibular defect in elderly patients is controversial. The aim of this study was to establish an algorithm for selecting a method of mandibular reconstruction in elderly patients. METHODS: We retrospectively evaluated 121 patients aged ≥65 years who underwent immediate microvascular mandibular reconstruction after oncologic resection. Patients were divided into three groups based on method of reconstruction: vascularized bone graft (n = 49), mandibular reconstruction plate and soft tissue flap (n = 22), and soft-tissue flap (n = 50)...
May 14, 2018: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29747911/evaluation-of-early-resin-luting-cement-damage-induced-by-voids-around-a-circular-fiber-post-in-a-root-canal-treated-premolar-by-integrating-micro-ct-finite-element-analysis-and-fatigue-testing
#9
Yen-Hsiang Chang, Hsuan-Wen Wang, Pei-Hsun Lin, Chun-Li Lin
OBJECTIVE: This study utilizes micro-CT image combined with finite element (FE) analysis and in vitro fatigue testing to investigate the mechanical behavior associating with early resin luting cement damage induced by voids around a circular fiber post in a root canal treated premolar. METHODS: Six similar mandibular first premolars with root canal treatment were scanned with high resolution micro-CT before and after fatigue testing. Micro-CT images of all teeth were processed to identify various materials (dentin, luting cement and void) to evaluate the volume/position of the void in each reconstructed tooth root canal model...
May 7, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29732952/clinical-comparison-of-scapular-fibular-and-iliac-crest-osseal-free-flaps-in-maxillofacial-reconstructions
#10
T Wilkman, A Husso, P Lassus
BACKGROUND AND AIMS: This study compared the three most used composite flaps in maxillofacial reconstructions in our institute. PATIENTS AND METHODS: Between 2000 and 2012, a total of 163 patients with mandibular, maxillary, and orbital defects received either scapular, fibular, or iliac crest osseal reconstructions in Helsinki University Hospital, Departments of Plastic Surgery and Maxillofacial Surgery. Data regarding the patient demographics, complications, and outcomes were analyzed...
May 1, 2018: Scandinavian Journal of Surgery: SJS
https://www.readbyqxmd.com/read/29730059/nasotracheal-intubation-the-preferred-airway-in-oral-cavity-microvascular-reconstructive-surgery
#11
Jordan Gigliotti, Godwin Cheung, Omar Suhaym, Ramanakumar V Agnihotram, Michel El-Hakim, Nicholas Makhoul
PURPOSE: We aimed to describe the safety and effectiveness of nasotracheal intubation (NTI) in a cohort of patients undergoing reconstruction of oral cavity defects with free tissue transfer (FTT). MATERIALS AND METHODS: We implemented a retrospective cohort study and enrolled a sample composed of consecutive patients undergoing FTT reconstruction of oral cavity, maxillary, or mandibular defects between 2013 and 2017. These patients were all subject to a newly developed enhanced recovery-after-surgery protocol...
April 11, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29729839/does-intraoperative-navigation-improve-the-accuracy-of-mandibular-angle-osteotomy-comparison-between-augmented-reality-navigation-individualised-templates-and-free-hand-techniques
#12
Ming Zhu, Fei Liu, Chaozheng Zhou, Li Lin, Yan Zhang, Gang Chai, Le Xie, Fazhi Qi, Qingfeng Li
BACKGROUND: Augmented reality (AR)-based navigation surgery has evolved to be an advanced assisted technology. The aim of this study is to manifest the accuracy of AR navigation for the intraoperative mandibular angle osteotomy by comparing the navigation with other interventional techniques. METHODS: A retrospective study was conducted with 93 post-surgical patients with mandibular angle hypertrophy admitted at our plastic and reconstructive surgery department between September 2011 and June 2016...
April 11, 2018: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29724208/a-retrospective-study-on-molar-furcation-assessment-via-clinical-detection-intraoral-radiography-and-cone-beam-computed-tomography
#13
Wenjian Zhang, Keagan Foss, Bing-Yan Wang
BACKGROUND: Accurate determination of bone loss at the molar furcation region by clinical detection and intraoral radiograph is challenging in many instances. Cone beam computed tomography (CBCT) is expected to open a new horizon in periodontal assessment. The purpose of this study was to compare and correlate accuracy of molar furcation assessment via clinical detection, intraoral radiography and CBCT images. METHODS: Eighty-three patients with chronic periodontitis who had existing CBCT scans were included...
May 3, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29723657/the-use-of-reconstruction-plates-to-treat-benign-mandibular-pathological-lesions-a-retrospective-clinical-study
#14
S C Isler, B Keskin Yalcin, S Cakarer, E Cansiz, A Gumusdal, C Keskin
INTRODUCTION: The purpose of this retrospective clinical study was to evaluate the indications for and the utility of reconstruction plates in the management of benign mandibular pathological lesions. The complications associated with plate use were also assessed. PATIENTS AND METHODS: The clinical and radiological data of 23 patients (16 males, 7 females) with large, benign mandibular pathologies were evaluated. During operations, reconstruction plates were used to prevent mandibular fracture or to allow for bone reconstruction after segmental or disarticulation resection...
April 30, 2018: Journal of Stomatology, Oral and 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
#15
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
#16
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/29715060/ameloblastic-carcinoma-in-situ-review-of-literature-and-a-case-presentation-in-a-pediatric-patient
#17
Artur Fahradyan, Lauren Odono, Jeffrey A Hammoudeh, Lori Kathryn Howell
Ameloblastic carcinomas are rare malignant lesions with 3 mandibular pediatric cases reported in the literature. We present a case of ameloblastic carcinoma in situ in a 15-year-old male with a right mandibular cystic lesion on computed tomography. The incisional biopsy revealed plexiform ameloblastoma. Due to the infiltrating and aggressive nature of the tumor, the patient underwent hemimandibulectomy and immediate reconstruction with a vascularized osteocutaneous fibula free flap. The final pathology was read as ameloblastic carcinoma in situ...
January 1, 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29714706/conservative-approach-for-molar-incisor-hypomineralization-a-case-report-and-7-year-follow-up
#18
Camila Porto Pessôa, Luciana Pion, Alessandra Reyes, Ronilza Matos, Cássio Fornazari Alencar, Tatiane Fernandes Novaes, Mariana Minatel Braga
Molar-incisor hypomineralization (MIH) can result in minor injuries or major structural loss, especially in incisors and molars. Patients with MIH seek dental treatment early, usually in childhood. Choosing the best treatment option during this stage can be a challenge. Because these patients still present a mixed dentition, the use of prosthetic appliances is not usually the best option. This case report with a 7-year follow-up presents an overview of a conservative approach for the restoration of teeth affected by MIH...
May 2018: General Dentistry
https://www.readbyqxmd.com/read/29713435/three-dimensional-finite-element-analysis-of-the-splinted-implant-prosthesis-in-a-reconstructed-mandible
#19
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
#20
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
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