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Craniofacial orthopedics

Jean-Michel Salagnac
INTRODUCTION: The mandible consists of different segments, each of which possess its own specific characteristics regarding emergence, ossification during growth and pathologies. Orthodontists need to be very familiar with these developmental anomalies if they are to avoid failure in their orthopedic or orthodontic treatments and in order to understand the reasons for the lack of success of "conventional" treatments. Each segment must develop correctly if the mandible is to achieve optimal development and occupy a normal position within the cranio-facial complex...
September 2016: L' Orthodontie Française
Rachel Kaye, Todd Goldstein, David Zeltsman, Daniel A Grande, Lee P Smith
Three dimensional (3D) printing is a novel technique that has evolved over the past 35 years and has the potential to revolutionize the field of medicine with its inherent advantages of customizability and the ability to create complex shapes with precision. It has been used extensively within the fields of orthopedics, dentistry, and craniofacial reconstruction with wide ranging utility including, medical modeling, surgical planning and the production of custom plates, screws and surgical guides. Furthermore, it has been used for similar means in the field of Otorhinolaryngology and also has potential to revolutionize the treatment of airway malacia...
October 2016: International Journal of Pediatric Otorhinolaryngology
Lin Wang, Chi Zhang, Chunyan Li, Michael D Weir, Ping Wang, Mark A Reynolds, Liang Zhao, Hockin H K Xu
Human induced pluripotent stem cell-derived mesenchymal stem cells (hiPSC-MSCs), dental pulp stem cells (hDPSCs) and bone marrow MSCs (hBMSCs) are exciting cell sources in regenerative medicine. However, there has been no report comparing hDPSCs, hBMSCs and hiPSC-MSCs for bone engineering in an injectable calcium phosphate cement (CPC) scaffold. The objectives of this study were to: (1) develop a novel injectable CPC containing hydrogel fibers encapsulating stem cells for bone engineering, and (2) compare cell viability, proliferation and osteogenic differentiation of hDPSCs, hiPSC-MSCs from bone marrow (BM-hiPSC-MSCs) and from foreskin (FS-hiPSC-MSCs), and hBMSCs in CPC for the first time...
December 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
Steven R Olmos, Franklin Garcia-Godoy, Timothy L Hottel, Nhu Quynh T Tran
PURPOSE: To investigate the relationship between craniofacial pain symptoms (painful conditions present in the cranium and face, including jaw joint-related pathology and primary headache conditions) and daytime sleepiness, determined by the Epworth sleepiness scale (ESS), to correlate comorbidity as well as potential predictive factors. METHODS: 1,171 patients seeking care for chronic pain and/or sleep-related breathing disorders (SRBDs) at 11 international treatment centers were included in the study...
June 2016: American Journal of Dentistry
Shmuel Einy, Hagai Hazan-Molina, Ayelet Ben-Barak, Dror Aizenbud
OBJECTIVE: Beta Thalassemia (βT) patients present a unique facial appearance and specific craniofacial, jaw and dental patterns. Although this anomaly often requires orthodontic management, βT patients have received scant attention in the orthodontic and dental literature over the past 50 years. The aim of this article is to review the characteristic craniofacial and dental manifestation pattern of βT patients and to emphasize their preferred orthodontic management protocol by presenting a βT orthodontic treated patient...
2016: Journal of Clinical Pediatric Dentistry
Chitravelu Siva Subramanian, N K K Koteswara Prasad, Arun B Chitharanjan, Eric Jein Wein Liou
Nasoalveolar molding (NAM) can be done effectively to reshape the nasal cartilage and mold the maxillary dentoalveolar arch before surgical cleft lip repair and primary rhinoplasty. Presurgical NAM helps as an adjunct procedure to enhance the esthetic and functional outcome of the surgical procedures. We have developed a modified NAM device to suit to the needs of the patients coming from distant places for the treatment. This device helps in reducing the number of frequent visits the patient needs to take to the craniofacial center...
July 2016: European Journal of Dentistry
Shehryar Nasir Khawaja, Heidi Crow, Yoly Gonzalez
Goldenhar syndrome (GS) is a development syndrome, characterized by incomplete development of the craniofacial region. The involvement is mainly unilateral; it varies from being mild to severe; and it can range from malocclusion and facial asymmetry to a more complex phenotype with complete absence of the mandibular ramus and temporomandibular joint. However, orthopedic symptoms of orofacial pain and dysfunction have not generally been considered as part of the symptom complex in GS cases. The case presented here is of a 15-year-old Caucasian patient, who was referred for evaluation because of bilateral pain in the masticatory muscles and temporomandibular joints...
April 2016: New York State Dental Journal
V Duquennoy-Martinot, A Belkhou, L Pasquesoone, C Depoortère, P Guerreschi
The scar of soft tissues is a permanent stigma of a trauma but it can sometimes be improved. It is more or less accepted by the patient and may be the source of a significant physical and psychosocial impact that leads to a request for a scar revision. Even if the child presents generally an excellent ability to heal, the quality of the scar depends on many factors such as the age, the type of scar or trauma and the affected body area. Thus, its aesthetic impact, functional but also on the growth of the child will be different...
June 23, 2016: Annales de Chirurgie Plastique et Esthétique
Guijuan Feng, Jinlong Zhang, Xingmei Feng, Senbin Wu, Dan Huang, Jing Hu, Songsong Zhu, Donghui Song
Distraction osteogenesis (DO) remains a major challenge in orthopedic and craniofacial surgery. The transplantion of mesenchymal stem cells (MSCs) could reduce the treatment period and the associated complications by increasing new bone formation during long-bone DO. Runt-related transcription factor 2 (Runx2) encodes a nuclear protein that is a pivotal regulator of osteoblast differentiation. It significantly stimulates calcium accumulation and alkaline phosphatase (ALP) activity in dental pulp stem cells (DPSCs)...
June 13, 2016: Differentiation; Research in Biological Diversity
Robert M Brody, Nirnimesh C Pandey, Andrés M Bur, Bert W O'Malley, Christopher H Rassekh, Gregory S Weinstein, Ara A Chalian, Jason G Newman, Steven B Cannady
BACKGROUND: The anterolateral thigh (ALT) free flap is one of the most commonly used donor sites in head and neck reconstruction, however, it is not typically considered when an osseous component is needed. METHODS: Soft tissue harvests, cadaveric study, and retrospective analysis of a series of 10 patients undergoing angiography were performed to assess vascular supply to the femoral cortex. In 6 patients, corticocancellous split-femur was incorporated into the ALT to reconstruct bony defects of the head and neck...
June 16, 2016: Head & Neck
A J Singhal, V Shetty, K R Bhagavan, Ananthan Ragothaman, V Shetty, Ganesh Koneru, M Agarwala
The role of 3-D printing is presented for improved patient-specific surgery planning. Key benefits are time saved and surgery outcome. Two hard-tissue surgery models were 3-D printed, for orthopedic, pelvic surgery, and craniofacial surgery. We discuss software data conversion in computed tomography (CT)/magnetic resonance (MR) medical image for 3-D printing. 3-D printed models save time in surgery planning and help visualize complex pre-operative anatomy. Time saved in surgery planning can be as much as two thirds...
April 2016: Indian Journal of Surgery
Marco Laurenti, Ahmed Al Subaie, Mohamed-Nur Abdallah, Arthur R G Cortes, Jerome L Ackerman, Hojatollah Vali, Kaustuv Basu, Yu Ling Zhang, Monzur Murshed, Satu Strandman, Julian Zhu, Nicholas Makhoul, Jake E Barralet, Faleh Tamimi
Hydrogels composed of two-dimensional (2D) nanomaterials have become an important alternative to replace traditional inorganic scaffolds for tissue engineering. Here, we describe a novel nanocrystalline material with 2D morphology that was synthesized by tuning the crystallization of the sodium-magnesium-phosphate system. We discovered that the sodium ion can regulate the precipitation of magnesium phosphate by interacting with the crystal's surface causing a preferential crystal growth that results in 2D morphology...
August 10, 2016: Nano Letters
Karim Poorsattar Bejeh Mir, Arash Poorsattar Bejeh Mir, Morvarid Poorsattar Bejeh Mir, Sina Haghanifar
The premise of complete ossification of midpalatal suture in early adulthood still has its popularity, though conflicting data are emerging in the literature. A 49-year-old male and a 54-year-old female Iranian patient, both dentulous, were referred to a Maxillofacial Radiology Center to be evaluated for implant insertion. In cone-beam computed tomography (CBCT) evaluation, an in-ossified suture was found in anterior two-third of midpalatal region of both individuals. The application of clinical vignettes from CBCT findings for maxillofacial orthodontic and orthopedic purposes is of value...
January 2016: Indian Journal of Dentistry
D W Weisgerber, K Erning, C L Flanagan, S J Hollister, B A C Harley
A particular challenge in biomaterial development for treating orthopedic injuries stems from the need to balance bioactive design criteria with the mechanical and geometric constraints governed by the physiological wound environment. Such trade-offs are of particular importance in large craniofacial bone defects which arise from both acute trauma and chronic conditions. Ongoing efforts in our laboratory have demonstrated a mineralized collagen biomaterial that can promote human mesenchymal stem cell osteogenesis in the absence of osteogenic media but that possesses suboptimal mechanical properties in regards to use in loaded wound sites...
August 2016: Journal of the Mechanical Behavior of Biomedical Materials
Julie Glowacki
The clinical demand for bone void fillers led to the development of off-the-shelf banked bone and synthetic and biologic substitute materials to be used either alone or as bone graft volume extenders. Demineralized bone (DB) has a remarkable capacity to induce new bone formation even when implanted subcutaneously in experimental animals, a phenomenon termed "osteoinduction." DB products are now widely available through tissue bank procurement of bone from rigorously screened donors. When properly processed, DB products are useful in craniomaxillofacial, oral, hand, and orthopedic applications...
December 2015: Journal of Oral and Maxillofacial Surgery
F Grecchi, G Perale, V Candotto, A Busato, M Pascali, F Carinci
The repair of complex craniofacial bone defects is challenging and a successful result depends on the defect size, the quality of the soft tissue covering the defect and the choice of reconstructive method. Autologous bone grafts are the gold standard for bone replacement. Tissue engineered constructs are temporary substitutes developed to treat damaged or lost tissue. Recent advances in materials science have provided an abundance of innovations, underlining the increasing importance of polymer in this field...
July 2015: Journal of Biological Regulators and Homeostatic Agents
Elizabeth W Bradley, Lomeli R Carpio, Andre J van Wijnen, Meghan E McGee-Lawrence, Jennifer J Westendorf
Histone deacetylases (Hdacs) are conserved enzymes that remove acetyl groups from lysine side chains in histones and other proteins. Eleven of the 18 Hdacs encoded by the human and mouse genomes depend on Zn(2+) for enzymatic activity, while the other 7, the sirtuins (Sirts), require NAD2(+). Collectively, Hdacs and Sirts regulate numerous cellular and mitochondrial processes including gene transcription, DNA repair, protein stability, cytoskeletal dynamics, and signaling pathways to affect both development and aging...
October 2015: Physiological Reviews
Sayuri Yoshizawa, Amy Chaya, Kostas Verdelis, Elizabeth A Bilodeau, Charles Sfeir
UNLABELLED: Magnesium (Mg) alloys have many unique qualities which make them ideal candidates for bone fixation devices, including biocompatibility and degradation in vivo. Despite a rise in Mg alloy production and research, there remains no standardized system to assess their degradation or biological effect on human stem cells in vivo. In this study, we developed a novel in vivo model to assess Mg alloys for craniofacial and orthopedic applications. Our model consists of a collagen sponge seeded with human bone marrow stromal cells (hBMSCs) around a central Mg alloy rod...
December 2015: Acta Biomaterialia
Nidhi Gupta, Kunwarjeet Singh
Fiber reinforced composite resin fixed partial dentures (FRCFPD) with composite resin, PFM or all ceramic pontic can be used as a short term or long term alternative to conventional fixed partial dentures or implant supported crown in young patients where conventional FPD is contraindicated (large pulp chambers) or in patient's unwilling to invasive implant placement surgical procedure and those who do not want to allow preparation of natural sound abutments for placement of retainers for FPD. FRCFPD can be successfully used for replacing missing anterior tooth (Turker and Sener, J Prosthet Dent 100:254-258, 2008), in conditions which allows minimum occlusal loading of pontic, over jet and overbite not greater than 3 mm (Ricketts, Provocations and perceptions in craniofacial orthopedics: dental science and facial art/parts 1 and 2...
December 2014: Journal of Indian Prosthodontic Society
Peter Ngan, Won Moon
Angle, Tweed, and Moyers classified Class III malocclusions into 3 types: pseudo, dentoalveolar, and skeletal. Clinicians have been trying to identify the best timing to intercept a Class III malocclusion that develops as early as the deciduous dentition. With microimplants as skeletal anchorage, orthopedic growth modification became more effective, and it also increased the scope of camouflage orthodontic treatment for patients who were not eligible for orthognathic surgery. However, orthodontic treatment combined with orthognathic surgery remains the only option for patients with a severe skeletal Class III malocclusion or a craniofacial anomaly...
July 2015: American Journal of Orthodontics and Dentofacial Orthopedics
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