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Journal of Cranio-maxillo-facial Surgery

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https://www.readbyqxmd.com/read/28803745/further-development-of-the-mronj-minipig-large-animal-model
#1
Sven Otto, Christoph Pautke, Olga Martin Jurado, Dirk Nehrbass, Martin J Stoddart, Michael Ehrenfeld, Stephan Zeiter
Medication-related osteonecrosis of the jaw (MRONJ) is a rare but serious and potentially severe side effect of antiresorptive therapy with bisphosphonates or denosumab. Recently, a large animal minipig MRONJ model was introduced which led to early necrotic lesions in the majority of extraction sites after bisphosphonate administration. The aim of this project was to modify the preoperative cumulative bisphosphonate dose (zoledronate) and hereby firstly to demonstrate the reliability and reproducibility of the established model...
July 18, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28800843/discectomy-without-replacement-improves-function-in-patients-with-internal-derangement-of-the-temporomandibular-joint
#2
Michael Miloro, Matthew McKnight, Michael D Han, Michael R Markiewicz
PURPOSE: Treatment of internal derangement is controversial. This study assessed the effectiveness of discectomy without replacement in improving jaw function and decreasing pain. MATERIALS AND METHODS: A retrospective cohort study sample of subjects with internal derangement underwent discectomy without replacement by one surgeon at a single academic medical center. The primary predictor variables were preoperative maximal incisal opening (MIO) and Helkimo Clinical Dysfunction Index (CDI) score...
July 17, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28800842/treatment-outcome-in-orthognathic-surgery-a-prospective-randomized-blinded-case-controlled-comparison-of-planning-accuracy-in-computer-assisted-two-and-three-dimensional-planning-techniques-part-ii
#3
Martin Bengtsson, Gert Wall, Lennart Greiff, Lars Rasmusson
PURPOSE: The aim of the present study was to compare the accuracy of two-dimensional (2D) and three-dimensional (3D) prediction methods. The hypothesis was that a 3D technique would give a more accurate outcome of the postoperative result. MATERIAL AND METHODS: Patients with severe class III occlusion were included and planed with both a 2D and 3D prediction technique. They were there after randomly subdivided into a control (2D) and test (3D) group and treated according to the technique randomized for...
July 12, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28793965/clinical-accuracy-of-waferless-maxillary-positioning-using-customized-surgical-guides-and-patient-specific-osteosynthesis-in-bimaxillary-orthognathic-surgery
#4
Marcus Heufelder, Frank Wilde, Sebastian Pietzka, Frank Mascha, Karsten Winter, Alexander Schramm, Majeed Rana
Computer-assisted planning and surgery for the treatment of orthognathic deformities have been extensively documented over the last decade. Computerized and customized wafers have lacked to improve the accuracy of maxillary positioning, resulting in a drawback of computer-assisted orthognathic surgery. The aim of this study was to determine the accuracy of a new technique of waferless maxillary positioning using customized surgical guides and patient specific osteosynthesis implants in bimaxillary orthognathic surgery...
July 8, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28764952/prospective-comparison-of-18-f-naf-pet-ct-versus-18-f-fdg-pet-ct-imaging-in-mandibular-extension-of-head-and-neck-squamous-cell-carcinoma-with-dedicated-analysis-software-and-validation-with-surgical-specimen-a-preliminary-study
#5
Raphael Lopez, Pierre Gantet, Anne Sophie Salabert, Anne Julian, Anne Hitzel, Beatrice Herbault-Barres, Charlotte Fontan, Sarah Alshehri, Pierre Payoux
BACKGROUND: The aim of this study is to propose a new method to quantify radioactivity with PET/CT imaging in mandibular extension in head and neck squamous cell carcinoma (HNSCC), using innovative software, and to compare results with microscopic surgical specimens. PATIENTS AND METHODS: This prospective study enrolled 15 patients who underwent (18)F-NaF and (18)F-FDG PET/CT. We compared the delineations of bone invasions obtained with (18)F-NaF PET/CT and (18)F-FDG PET/CT with the results of histopathological analysis of mandibular resections (from right and left bone borders)...
July 8, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28754365/change-in-lip-closing-force-in-classes-ii-and-iii-malocclusion-before-and-after-sagittal-split-ramus-osteotomy-with-le-fort-i-osteotomy
#6
Takamitsu Tsutsui, Kunio Yoshizawa, Akinori Moroi, Asami Hotta, Kenichi Fukaya, Ryota Hiraide, Akihiro Takayama, Tatsuya Tsunoda, Yuki Saito, Ran Iguchi, Akihiko Kosaka, Hiroumi Ikawa, Koichiro Ueki
PURPOSE: The purpose of this study was to examine lip closing force in Class II and III patients before and after orthognathic surgery. SUBJECT AND METHODS: The subjects were 45 patients (15 Class II women, 15 Class III men and 15 Class III women) diagnosed with jaw deformity who underwent sagittal split ramus osteotomy with Le Fort I osteotomy and 30 controls with normal skeleton and occlusion (15 men, 15 women). Maximum and minimum lip closing forces were measured using Lip De Cum(®) before and after surgery, and compared statistically...
July 8, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28797820/the-pterygoalar-bar-a-meta-analysis-of-its-prevalence-morphology-and-morphometry
#7
Przemysław A Pękala, Brandon Michael Henry, Jakub R Pękala, Paulina A Frączek, Dominik Taterra, Konstantinos Natsis, Maria Piagkou, Janusz Skrzat, Iwona M Tomaszewska
PURPOSE: The pterygoalar (PA) bar is a bony bridge resulting from the partial or complete ossification of a PA ligament. The aim of this meta-analysis was to systematically analyze and provide the most comprehensive data on the prevalence, morphology and topographical anatomy of the PA bar. MATERIALS AND METHODS: A comprehensive search of the major electronic databases (PubMed, Embase, ScienceDirect, SciELO, BIOSIS, and Web of Science) was conducted in order to identify relevant studies...
July 6, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28778355/use-of-fused-deposit-modeling-for-additive-manufacturing-in-hospital-facilities-european-certification-directives
#8
Joel J Otero, An Vijverman, Maurice Y Mommaerts
PURPOSE: The goal of this study was to identify current European Union regulations governing hospital-based use of fused deposit modeling (FDM), as implemented via desktop three-dimensional (3D) printers. MATERIALS AND METHODS: Literature and Internet sources were screened, searching for official documents, regulations/legislation, and views of specialized attorneys or consultants regarding European regulations for 3D printing or additive manufacturing (AM) in a healthcare facility...
July 6, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28756967/the-self-defining-axis-of-symmetry-a-new-method-to-determine-optimal-symmetry-and-its-application-and-limitation-in-craniofacial-surgery
#9
Markus Martini, Anne Klausing, Martina Messing-Jünger, Guido Lüchters
PURPOSE: Analysis of symmetry represents an essential aspect of plastic-reconstructive surgery. For cases in which reference points are either not fixed or are changed due to corrective intervention the determination of a symmetry axis is sometimes almost impossible and a pre-defined symmetry axis would not always be helpful. To assess cranial shape of surgical patients with craniosynostosis, a new algebraic approach was chosen in which deviation from the optimal symmetry axis could be quantified...
July 6, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28750725/hydroxyapatite-collagen-scaffold-with-autologous-bone-marrow-aspirate-for-mandibular-condylar-reconstruction
#10
Debraj Howlader, U Vignesh, Dichen P Bhutia, Rahul Pandey, Sumit Kumar, Tulika Chandra, Divya Mehrotra
PURPOSE: This study was designed with the aim to assess the efficiency of hydroxyapatite/collagen (HA/Col) bio-scaffold with bone marrow aspirate (BMA) to reconstruct mandibular condyle in patients with temporomandibular joint (TMJ) ankylosis. MATERIALS AND METHODS: Seven pediatric patients with TMJ ankylosis, who visited our outpatient clinic and whose parents opted for this procedure, were included in this study. After a history and clinical examination for TMJ movements, computed tomography (CT) scans were obtained...
July 6, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28747264/free-flap-surgical-correction-of-facial-deformity-after-anteromedial-maxillectomy
#11
Shunji Sarukawa, Hideaki Kamochi, Tadahide Noguchi, Ataru Sunaga, Hirokazu Uda, Yoshiyuki Mori, Hiroshi Nishino, Kotaro Yoshimura
Anteromedial maxillectomy is typically performed in conjunction with low-dose radiotherapy and intraarterial chemotherapy. In doing so, the extent of surgical defects is reduced. However, nasal deviation and oral incompetence may ensue, due to cicatricial contracture of wounds, and may be distressing to these patients. Herein, we report a series of eight free perforator flap procedures (anterolateral thigh [ALT] flap, 6; thoracodorsal artery perforator [TAP] flap, 2) used to correct such deformities. The TAP flap was combined with scapular tip [ST] osseous flap in patients with added zygomatic prominence defects...
July 6, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28747263/the-validity-and-reliability-of-computed-tomography-orbital-volume-measurements
#12
Silviu C Diaconu, David Dreizin, Mehmet Uluer, Corey Mossop, Michael P Grant, Arthur J Nam
PURPOSE: Orbital volume calculations allow surgeons to design patient-specific implants to correct volume deficits. It is estimated that changes as small as 1 ml in orbital volume can lead to enophthalmos. Awareness of the limitations of orbital volume computed tomography (CT) measurements is critical to differentiate between true volume differences and measurement error. The aim of this study is to analyze the validity and reliability of CT orbital volume measurements. MATERIALS AND METHODS: A total of 12 cadaver orbits were scanned using a standard CT maxillofacial protocol...
July 6, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28736109/electromyographic-analysis-of-superior-orbicularis-oris-muscle-function-in-children-surgically-treated-for-unilateral-complete-cleft-lip-and-palate
#13
Liliana Szyszka-Sommerfeld, Krzysztof Woźniak, Teresa Matthews-Brzozowska, Beata Kawala, Marcin Mikulewicz
PURPOSE: The aim of this study was to assess the electrical activity of the superior orbicularis oris muscle in children surgically treated for unilateral complete cleft lip and palate (UCCLP). MATERIAL AND METHODS: The sample comprised 45 patients 6.38-12.68 years of age with UCCLP and 40 subjects 6.61-11.71 years of age with no clefts. Electromyographical (EMG) recordings were taken with a DAB-Bluetooth Instrument (Zebris Medical GmbH, Germany) in the rest position and during saliva swallowing, lip protrusion and reciprocal compression of the lips, as well as while producing the phonemes /p/, /b/, and /m/ combined with the vowel /a/...
July 5, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28818322/stability-of-biodegradable-metal-mg-ca-zn-alloy-screws-compared-with-absorbable-polymer-and-titanium-screws-for-sagittal-split-ramus-osteotomy-of-the-mandible-using-the-finite-element-analysis-model
#14
Jee-Ho Lee, Hyung-Seop Han, Yu-Chan Kim, Jin-Yong Lee, Bu-Kyu Lee
Mg-Ca-Zn alloy has been suggested for the application of fixation materials during maxillofacial surgery. We investigated the stability of Mg-Ca-Zn alloy for clinical application during orthognathic surgery. The finite element model for the fixation of sagittal split ramus osteotomy was constructed. In the bicortical screw fixation of the mandible setback condition, the stress distributions of Mg-Ca-Za alloy, polylactic acid polymer, and titanium were evaluated using the virtual model with occlusal loading of 132 N...
July 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28743605/three-dimensional-analysis-of-the-pharyngeal-airway-space-and-hyoid-bone-position-after-orthognathic-surgery
#15
Amanda Lury Yamashita, Liogi Iwaki Filho, Pablo Cornélius Comelli Leite, Ricardo de Lima Navarro, Adilson Luiz Ramos, Isolde Terezinha Santos Previdelli, Matheus Henrique Dal Molin Ribeiro, Lilian Cristina Vessoni Iwaki
PURPOSE: The aim of this study was to evaluate changes in the pharyngeal airway space (PAS) and hyoid bone position after orthognathic surgery with cone-beam computed tomography (CBCT). MATERIAL AND METHODS: This study was conducted with the tomographic records of 30 patients with skeletal class II or III deformities submitted to two different types of orthognathic surgery: Group 1 (n = 15), maxillary advancement, and mandibular setback; and Group 2 (n = 15), maxillomandibular advancement...
July 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28743604/clinicopathological-features-management-and-outcome-of-patients-with-poorly-differentiated-oral-and-oropharyngeal-squamous-cell-carcinoma
#16
Zhien Feng, Qiao Shi Xu, Chong Wang, Bo Li, Jin Zhong Li, Ming Hui Mao, Hua Li, Li Zheng Qin, Zhengxue Han
BACKGROUND: The purpose of this study was to explore the clinicopathological features, risk factors, and management of poorly differentiated oral and oropharyngeal squamous cell carcinoma (OOSCC) patients in the northern Chinese population. METHOD: A total of 118 poorly differentiated OOSCC patients from 2236 consecutive cases were retrospectively enrolled in this study. RESULTS: Cox regression analysis showed that site (hazard ratio (HR): 2...
July 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28739094/automatic-repositioning-of-jaw-segments-for-three-dimensional-virtual-treatment-planning-of-orthognathic-surgery
#17
Rodrigo Mologni Gonçalves Dos Santos, José Mario De Martino, Luis Augusto Passeri, Romis Ribeiro de Faissol Attux, Francisco Haiter Neto
PURPOSE: To develop a computer-based method for automating the repositioning of jaw segments in the skull during three-dimensional virtual treatment planning of orthognathic surgery. The method speeds up the planning phase of the orthognathic procedure, releasing surgeons from laborious and time-consuming tasks. MATERIALS AND METHODS: The method finds the optimal positions for the maxilla, mandibular body, and bony chin in the skull. Minimization of cephalometric differences between measured and standard values is considered...
July 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28684075/achieved-chin-position-after-genioplasty-follows-the-planned-horizontal-change-better-than-the-planned-vertical-change
#18
Jimoh Olubanwo Agbaje, Yi Sun, Ahmed S Salem, Zhaokai Li, Kelvin Osei Adu, Constantinus Politis
PURPOSE: The soft-tissue pogonion closely follows changes of the bony pogonion, but it is unknown how often an augmented bony pogonion reaches the intended position. Here we assessed the agreement between planned surgical changes and achieved results in chin surgery. MATERIALS AND METHODS: Surgical treatment was planned based on clinical examination, cast model analysis, and cephalometric image analysis. The mobile chin segment was stabilized using one chin plate...
July 3, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28724507/comparison-of-endocranial-morphology-according-to-age-in-one-piece-fronto-orbital-advancement-using-a-distraction-in-craniosynostotic-plagiocephaly
#19
Woo Shik Jeong, Ersin Altun, Jong Woo Choi, Young Shin Rah
The capacity for cranial remodelling is known to be better at younger ages. The timing of cranioplasty could affect the axis of the skull base. We investigated whether age at the time of distraction is related to the outcome of endocranial morphology correction. In this retrospective study, we investigated the surgical outcome of 14 patients with unilateral craniosynostotic plagiocephaly who underwent one-piece fronto-orbital advancement without bandeau by using a distraction technique between April 2005 and December 2015...
June 17, 2017: Journal of Cranio-maxillo-facial Surgery
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
#20
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...
June 16, 2017: Journal of Cranio-maxillo-facial Surgery
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