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https://www.readbyqxmd.com/read/28230649/-stamp-perforation-technique-for-correction-of-prominent-mandibular-angle-10-years-of-experience-in-mandibular-reshaping-in-asians
#1
Bowen Gao, Jizhou He, Feng Xie, Hainan Zhu, Liang-Gang Yu, Qingfeng Li
Resection of a prominent mandibular angle is commonly used in Eastern society to improve the lower one third facial proportion. Historically, this procedure had a high complication rate, such as severe bleeding, asymmetry of the angle reduction, and "second mandibular angle." A safer and more effective way of performing such procedures is needed. The aim of this study is to introduce 3 instruments, a tunable guide handpiece, milling cutter, and flywheel, which were invented by the author, as well as a related ostectomy technique for correcting prominent mandibular angles using a modified full-thickness marginal ostectomy of the mandibular corpus angle, named the "stamp perforation" technique...
February 23, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28230596/the-efficacy-of-immediate-implant-placement-in-extraction-sockets-for-alveolar-bone-preservation-a-clinical-evaluation-using-three-dimensional-cone-beam-computerized-tomography-and-resonance-frequency-analysis-value
#2
Ali Al Qabbani, Noor Hayati A Razak, Sausan Al Kawas, Suzina Sheikh Abdul Hamid, Saad Wahbi, A R Samsudin
The aim of this study was to determine the efficacy of immediate implant placement with alveolar bone augmentation on socket preservation following atraumatic tooth extraction and comparing it with a tooth alveolar socket that was allowed to heal in a conventional way.Twenty medically fit patients (8 males and 12 females aged between 18 and 40 years) who needed noncomplicated tooth extraction of mandibular premolar teeth were divided randomly and equally into 2 groups. In Group I, the empty extraction socket was left untreated and allowed to heal in a conventional way...
February 22, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28230590/modified-lateral-surgical-approach-to-the-pterygopalatine-fossa
#3
Masataka Uehara, Masaaki Sasaguri, Shunji Shiiba, Kazuhiro Tominaga
Oral cancer, especially that originates in the maxillary tuberosity, buccal mucosa, and maxillary alveolus, is apt to invade the pterygopalatine fossa, where an intraoral approach is nearly impossible. There are 2 main types of extraoral approach to the pterygopalatine fossa; the anterior approach and the lateral approach. Although the lateral approach has an advantage compared with the anterior approach in terms of cosmetics, after the operation numbness of the lower lip occurs due to the sacrifice of the mental nerve...
February 22, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28229424/three-dimensional-printed-scaffolds-with-multipotent-mesenchymal-stromal-cells-for-rabbit-mandibular-reconstruction-and-engineering
#4
Dongdong Fang, Michael Roskies, Mohamed-Nur Abdallah, Mohammed Bakkar, Jack Jordan, Li-Chieh Lin, Faleh Tamimi, Simon D Tran
Multipotent mesenchymal stromal cells (MSC) derived from both the bone marrow and adipose tissue possess the ability to differentiate into multiple cell lineages, regulate the immune function by secreting numerous bioactive paracrine factors, and hold great potential in cell therapy and tissue engineering. When combined with three-dimensional (3D) scaffolds, MSC can be used for bone defect reconstruction and engineering. This protocol describes the isolation of bone marrow mesenchymal stromal cells (BMMSC) and adipose-tissue derived stem cells (ADSC) from rabbits for subsequent seeding on tissue-engineered 3D-printed scaffolds and transplantation into a rabbit-model with the goal of repairing large osseous mandibular defects (one quarter of the lower jaw is removed surgically)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28229236/asymmetric-bone-remodeling-in-mandibular-and-maxillary-tori
#5
Jean-Daniel Kün-Darbois, Bernard Guillaume, Daniel Chappard
OBJECTIVES: Tori are frequent paucisymptomatic bony outgrowths of the oral cavity in three locations: torus palatinus (TP), mandibularis (TM), and maxillaris (TMax). Their usually described histological characteristics are unspecific: normal cortical bone with more or less trabecular bone. The aim of this study was to describe tori's specific morphological and histomorphometric characteristics. MATERIALS AND METHODS: Histological characteristics in a series of 18 tori collected after surgical removal were analyzed...
February 23, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28228883/posttraumatic-mandibular-asymmetry-presenting-in-a-young-adult
#6
Mahnaz Sheikhi, Maryam Ghazizadeh, Mohammad Mahdi Salehi
One of the most common sites of injury of the facial skeleton is mandibular condyle. However, it is the least diagnosed site of trauma in the head and neck regions. A trauma to the mandible and specifically condylar zone during childhood, may lead to asymmetry or mandibular bilateral distortion, which is usually manifested in the second decade of life when the etiology is unknown to most people. This report is about an adult male complaining about facial asymmetry with an unknown source. Obvious clicking at the right side and shorter right ramus and condyle's head deviation directed us to a childhood trauma and fracture...
March 2017: Radiology case reports
https://www.readbyqxmd.com/read/28228785/mesenchymal-stem-cells-in-post-surgical-cavities-of-large-maxillary-bone-lesions
#7
Roberto Bertolai, Carlo Catelani, Mattia Signorini, Alessandro Rossi, Domenico Giannini
BACKGROUND: Recent studies have highlighted that MSCs are capable of regenerating large bone defects when used in combination with bone substitutes and increasing allo-graft osteointegration. We investigated the hypothesis that autologous MSCs may lead to increased bone regeneration and reduced healing time in post-surgical cavities of large maxillary bone lesions. METHODS: This study involved 10 patients (TEST GROUP) (6 males and 4 females). All patients had expansive mandibular lesions larger than 3 cm...
September 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/28228337/minimizing-the-mandibular-advancement-in-an-oral-appliance-for-the-treatment-of-obstructive-sleep-apnea
#8
Eduardo Anitua, Joaquín Durán-Cantolla, Gabriela Zamora Almeida, Mohammad Hamdan Alkhraisat
OBJECTIVE: In the treatment of obstructive sleep apnea (OSA) with an oral appliance (OA), there is no gold standard method to fine-tune the mandibular advancement. This study aimed to analyze the effect of gradual increment of mandibular advancement on the evolution of the apnea-hypopnea index (AHI). METHODS: OSA patients were recruited from a sleep unit. All treatments started with an oral appliance without mandibular advancement. After two weeks, the AHI was assessed with respiratory polygraphy...
January 29, 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28228135/comparison-of-digital-panoramic-radiography-versus-cone-beam-computerized-tomography-for-measuring-alveolar-bone
#9
Zunan Tang, Xianchu Liu, Kejia Chen
BACKGROUND: Cone beam computerized tomography (CBCT) has been widely used in dental implanting. However, the local hospitals usually don't have access to CBCT due to the cost and medical investment, especially in West of China. The doctors in local hospitals have to make reasonable dental planting using orthopantomography (OPG) to reduce risks. Therefore, it is clinically meaningful to determine the magnification rate of OPG to obtain correct diagnosis. This study investigated the magnification rate of OPG in measuring different maxillofacial loci compared with CBCT...
February 22, 2017: Head & Face Medicine
https://www.readbyqxmd.com/read/28227462/auto-adjusting-mandibular-repositioning-device-for-in-home-use
#10
R Brugarolas, J M Valero-Sarmiento, A Bozkurt, G K Essick, R Brugarolas, J M Valero-Sarmiento, A Bozkurt, G K Essick, J M Valero-Sarmiento, G K Essick, R Brugarolas, A Bozkurt
Obstructive Sleep Apnea (OSA) is a form of respiratory dysfunction that affects 20% of adults in the world. Among the first-line treatments that are used to mitigate the effects of OSA are continuous positive airway pressure (CPAP) and mandibular repositioning devices (MRD). Although CPAP provides a more efficacious therapy than MRDs, recent studies suggest that both are comparable in overall effectiveness due to greater patient preference and adherence to MRD therapy. In this paper, we present the Auto-Positioner, a novel add-on for MRDs that adjusts the extent to which the mandible (lower jaw) is advanced in response to respiratory signals indicating labored breathing during sleep, and to changes in sleeping position known to affect individual patient's airway patency...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227031/automatic-segmentation-and-user-friendly-software-techniques-for-virtual-surgical-planning-of-mandibular-reconstruction
#11
Youngjun Kim, Sunhee Kim, Hannah Kim, Hyunchul Cho, Deukhee Lee, Laehyun Kim, Sehyung Park, Jung-Woo Lee, Youngjun Kim, Sunhee Kim, Hannah Kim, Hyunchul Cho, Deukhee Lee, Laehyun Kim, Sehyung Park, Jung-Woo Lee, Sehyung Park, Jung-Woo Lee, Laehyun Kim, Youngiun Kim, Sunhee Kim, Deukhee Lee, Hannah Kim, Hyunchul Cho
Compared to conventional mandibular reconstruction surgery, a recent approach of virtual planning can reduce surgical time providing reliable surgical outcomes. We present our virtual surgical planning software using automatic segmentation and user-friendly techniques. Evaluation experiments compared with a commercial software prove that the proposed software can achieve successful surgical planning in reduced time with reliable accuracy.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227030/sparse-shape-model-for-fibular-transfer-planning-in-mandibular-reconstruction
#12
Riho Kawasaki, Megumi Nakao, Yuichiro Imai, Nobuhiro Ueda, Toshihide Hatanaka, Mao Shiba, Tadaaki Kirita, Tetsuya Matsuda, Riho Kawasaki, Megumi Nakao, Yuichiro Imai, Nobuhiro Ueda, Toshihide Hatanaka, Mao Shiba, Tadaaki Kirita, Tetsuya Matsuda, Nobuhiro Ueda, Yuichiro Imai, Riho Kawasaki, Toshihide Hatanaka, Megumi Nakao, Tadaaki Kirita, Mao Shiba, Tetsuya Matsuda
In this paper, we propose an automated preoperative planning method that estimates a plan fitted to the data of a new patient using a planned dataset of previous patients. Although mandibular reconstruction with fibular segments needs preoperative planning for the precise placement of segments, recent interactive planning software cannot secure objectivity of the planning and time-consuming trial-and-error processes are required. The proposed method employs sparse shape modeling; in this modeling, we select a subset of the data from a prepared preoperative planning dataset to make an example or instance of reconstruction via a linear combination of the data...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226956/stability-of-the-permanently-bent-plates-used-in-mandibular-reconstructive-surgery
#13
Si-Myung Park, Deukhee Lee, Jung-Woo Lee, Youngjun Kim, Laehyun Kim, Gunwoo Noh, Si-Myung Park, Deukhee Lee, Jung-Woo Lee, Youngjun Kim, Laehyun Kim, Gunwoo Noh, Youngjun Kim, Si-Myung Park, Jung-Woo Lee, Laehyun Kim, Gunwoo Noh, Deukhee Lee
In mandibular reconstructive surgery, straight surgical plates are predominantly used for osteotomy. In this process, a straight plate is bent to fit to the shape of the patient's defect. This potentially compromises the stability of the plate because of changes in mechanical properties resulting from plastic deformation; however, the effect of plastic deformation on stability has yet been investigated. In this study, we assess the stability of three types of commonly used bent plates for two types of mandible defect cases, using three-dimensional finite element analysis (FEA)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226765/generation-of-3d-thermal-models-for-dentistry-applications
#14
Mauren Abreu de Souza, Andriy Guilherme Krefer, Gustavo Benvenutti Borba, Gustavo J Vizinoni E Silva, Ana Paula G O Franco, Humberto Remigio Gamba, Mauren Abreu de Souza, Andriy Guilherme Krefer, Gustavo Benvenutti Borba, Gustavo J Vizinoni E Silva, Ana Paula G O Franco, Humberto Remigio Gamba, Gustavo Benvenutti Borba, Andriy Guilherme Krefer, Ana Paula G O Franco, Mauren Abreu de Souza, Humberto Remigio Gamba, Gustavo J Vizinoni E Silva
There are a variety of medical imaging modalities available, although each modality focus into different aspects, for example: anatomical, physiological or geometrical information. This paper presents a new imaging modality (3D THERMO-SCAN) that combines anatomical computer tomography (CT) imaging slices, together with 2D infrared thermography images and 3D scanned shaped models of the area under study. Therefore, it is presented the 3D reconstructions involving a case study of a volunteer with bruxism. Some characteristics of bruxism are the hyperactivity of the chewing muscles, which changes the dynamics of microcirculation, also changing the correspondent skin's temperature...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226378/mandibular-rim-trilogy-with-botulinum-toxin-injection-reduction-projection-and-lift
#15
Renpeng Zhou, Benyun Pan, Chen Wang, Danru Wang
"Onabotulinum toxin A (Botox) revolution" has brought the fundamental change in the facial rejuvenation as well as the concept of microinjection. The aesthetic standard tends to be the "globalization"; however, Asians have different aesthetic cultures and unique facial features compared with Caucasians. A new rejuvenation concept is proposed during our practice; the Asian face should preserve the original facial identity during Botox treatments. The lower face is treated with botulinum toxin to achieve a harmonious facial profile...
February 2017: Facial Plastic Surgery: FPS
https://www.readbyqxmd.com/read/28225162/mandibular-position-and-movements-suitability-for-diagnosis-of-sleep-apnoea
#16
Jean-Benoit Martinot, Jean-Christian Borel, Valérie Cuthbert, Hervé Jean-Pierre Guénard, Stéphane Denison, Philip E Silkoff, David Gozal, Jean-Louis Pepin
BACKGROUND AND OBJECTIVE: Mandibular movements (MMs) and position during sleep reflect respiratory efforts related to increases in upper airway resistance and micro-arousals. The study objective was to assess whether MM identifies sleep-disordered breathing (SDB) in patients with moderate to high pre-test probability. METHODS: This was a prospective study of 87 consecutive patients referred for an in-laboratory sleep test. Magnetometer-derived MM signals were incorporated into standard polysomnography (PSG)...
November 6, 2016: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28222928/reconstruction-of-complex-mandibular-defects-using-integrated-dental-custom-made-titanium-implants
#17
A Rachmiel, D Shilo, O Blanc, O Emodi
No abstract text is available yet for this article.
February 17, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28222869/accuracy-evaluation-of-intraoral-optical-impressions-a-clinical-study-using-a-reference-appliance
#18
Mohammad A Atieh, André V Ritter, Ching-Chang Ko, Ibrahim Duqum
STATEMENT OF PROBLEM: Trueness and precision are used to evaluate the accuracy of intraoral optical impressions. Although the in vivo precision of intraoral optical impressions has been reported, in vivo trueness has not been evaluated because of limitations in the available protocols. PURPOSE: The purpose of this clinical study was to compare the accuracy (trueness and precision) of optical and conventional impressions by using a novel study design. MATERIAL AND METHODS: Five study participants consented and were enrolled...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222867/prosthodontic-treatment-of-a-retrognathic-edentulous-maxilla-demonstrating-limited-interarch-distance-3-5-year-results-with-fixed-and-removable-implant-prostheses
#19
Won-Suk Oh, Furat George, Ju-Mi Park
The prosthodontic treatment of patients with a retrognathic edentulous maxilla should consider the restoration of the lower facial profile and access for oral hygiene. This clinical report describes prosthodontic treatments of a patient with edentulism who presented with repeated fractures of the denture teeth of a maxillary implant-supported complete fixed dental prosthesis (ICFDP) and a mandibular implant-supported overdenture. Considerable plaque accumulation was noted on the ICFDP, which was replaced with an open palatal design implant-supported overdenture...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222838/prevalence-of-food-impaction-induced-periodontitis-in-conventionally-housed-marsh-rice-rats-oryzomys-palustris
#20
Jonathan G Messer, Jessica M Jiron, Hung-Yuan Chen, Evelyn J Castillo, Jorge L Mendieta Calle, Mary K Reinhard, Donald B Kimmel, J Ignacio Aguirre
Marsh rice rats (Oryzomys palustris) fed a pelleted diet high in sucrose and casein have been used as a model for moderate to severe periodontitis. Here we characterize the prevalence, location, and histopathologic features of food-impaction lesions (FIL), a unique type of oral event, in rice rats fed standard pelleted rodent chow from weaning until 34 wk of age. Healthy female rats (n = 90; age, 4 wk) were weaned into groups (n = 10 to 24) and were euthanized at 4, 16, 22, 28, or 34 wk of age. At necropsy, high-resolution photographs of the 4 jaw quadrants were examined by 3 independent observers to determine the presence, number, and location of FIL...
February 1, 2017: Comparative Medicine
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