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maxillofacial implants

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https://www.readbyqxmd.com/read/28104582/amniotic-fluid-derived-stem-cells-mixed-with-platelet-rich-plasma-for-restoration-of-rat-alveolar-bone-defect
#1
Minjiao Wang, Hongliang Li, Jiawen Si, Jiewen Dai, Jun Shi, Xudong Wang, Lihe Guo, Guofang Shen
Stem cells isolated from the amniotic fluid have been shown as a promising candidate for cell therapy and tissue engineering. However, the experimental and preclinical applications of amniotic fluid-derived stem cells (AFSCs) in the very field of maxillofacial bone tissue engineering are still limited. In this study, rat AFSCs were successfully harvested and characterized in vitro The rat AFSCs showed typical fibroblastoid morphology, stable proliferation activity and multi-differentiation potential. Flow-cytometry analysis demonstrated that these cells were positive for CD29, CD44, and CD90, while negative for hematopoietic markers such as CD34 and CD45...
January 18, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28101497/the-factors-that-influence-postoperative-stability-of-the-dental-implants-in-posterior-edentulous-maxilla
#2
Yun-Ho Kim, Na-Rae Choi, Yong-Deok Kim
BACKGROUND: All clinicians are aware of the difficulty of installing a dental implant in posterior maxilla because of proximate position of maxillary sinus, insufficient bone width, and lower bone density. This study is to examine which factors will make the implantation in the posterior maxilla more difficult, and which factors will affect the postoperative implant stability in this region. METHODS: Five hundred seventy-three fixtures on the maxilla posterior were included for this study from all the patients who underwent an installation of the dental implant fixture from January 2010 to December 2014 at the Department of Oral and Maxillofacial Surgery in Pusan National University Dental Hospital (Yangsan, Korea)...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28057033/reducing-the-risk-of-impaired-bone-apposition-to-titanium-screws-with-the-use-of-fibroblast-growth-factor-2-apatite-composite-layer-coating
#3
Kengo Fujii, Atsuo Ito, Hirotaka Mutsuzaki, Shinji Murai, Yu Sogo, Yuki Hara, Masashi Yamazaki
BACKGROUND: Loosening of screws is a common problem in orthopedic and maxillofacial surgery. Modifying the implant surface to improve the mechanical strength of screws has been tried and reported. We developed screws coated with fibroblast growth factor-2 (FGF-2)-apatite composite layers. We then showed, in a percutaneous external fixation model, that this composite layer had the ability to hold and release FGF-2 slowly, thereby reducing the risk of pin tract infection of the percutaneous external fixation...
January 5, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28045820/magnet-retained-orbital-prosthesis-using-a-dental-implant
#4
Soung Min Kim
The loss of an eye and the associated facial disharmony has major physical, psychological, and social consequences for patients undergoing orbital exenteration. A magnet-retained prosthesis with an implant has various advantages over both adhesive and spectacle-retained prostheses for reconstruction of the exenterated orbit.The author demonstrates one representative patient with our orbital reconstruction patients with magnetic implants, which will be applied to various maxillofacial prosthesis strategies in the near future...
December 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28027185/use-of-virtual-surgical-planning-for-simultaneous-maxillofacial-osteotomies-and-custom-polyetheretherketone-implant-in-secondary-orbito-frontal-reconstruction-importance-of-restoring-orbital-volume
#5
Neel Patel, Beomjune Kim, Waleed Zaid
Correction of orbito-frontal defects involves a multitude of surgical challenges, and requires careful and detailed planning. In the trauma setting, one must be prepared to deal with injuries to adjacent structures and be able to incorporate their repair into the surgical plan to maximize the functional and esthetic reconstruction for the benefit of the patient. Victims who have sustained trauma of the cranial complex in combination with mid-facial trauma, particularly involving the orbit, present a difficult scenario, especially when future ocular prosthetic rehabilitation is a concern...
December 23, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28008429/applications-of-patient-specific-3d-printing-in-medicine
#6
Martin Heller, Heide-Katharina Bauer, Elisabeth Goetze, Matthias Gielisch, Klaus E Roth, Philipp Drees, Gerrit S Maier, Bernhard Dorweiler, Ahmed Ghazy, Meik Neufurth, Werner E G Müller, Heinz C Schröder, Xiaohong Wang, Christian-Friedrich Vahl, Bilal Al-Nawas
Already three decades ago, the potential of medical 3D printing (3DP) or rapid prototyping for improved patient treatment began to be recognized. Since then, more and more medical indications in different surgical disciplines have been improved by using this new technique. Numerous examples have demonstrated the enormous benefit of 3DP in the medical care of patients by, for example, planning complex surgical interventions preoperatively, reducing implantation steps and anesthesia times, and helping with intraoperative orientation...
2016: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28005779/a-new-approach-to-the-use-of-osseointegrated-implants-in-palate-obturator
#7
Laura Lago, Benito Rilo, Noelia Fernández-Formoso, Luis da Silva
Osseointegrated implants are regularly used for retention and stability of maxillofacial prosthesis, especially in palatal obturator with large defects and few remaining teeth. In these cases, loads that tissues receive from a prosthesis can cause bone resorption and thus enlarge the defect. Implants may help redistribute the loads on the perimplant bone crest and avoid exacerbating the defect. The authors present a case in which the palatal defect has increased overtime. After placement of a sealing prosthesis with implants, bone and mucosal tissues stability around the defect it is observed during 1 year of follow-up...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27995123/evaluation-of-clinical-outcomes-of-implants-placed-into-the-maxillary-sinus-with-a-perforated-sinus-membrane-a-retrospective-study
#8
Gwang-Seok Kim, Jae-Wang Lee, Jong-Hyon Chong, Jeong Joon Han, Seunggon Jung, Min-Suk Kook, Hong-Ju Park, Sun-Youl Ryu, Hee-Kyun Oh
BACKGROUND: The aim of this study was to evaluate the clinical outcomes of implants that were placed within the maxillary sinus that has a perforated sinus membrane by the lateral window approach. METHODS: We examined the medical records of the patients who had implants placed within the maxillary sinus that has a perforated sinus membrane by the lateral approach at the Department of Oral and Maxillofacial Surgery of Chonnam National University Dental Hospital from January 2009 to December 2015...
December 2016: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27986443/3d-printed-simulation-device-for-orbital-surgery
#9
Juergen Thomas Lichtenstein, Alexander Nicolai Zeller, Juliana Lemound, Thorsten Enno Lichtenstein, Majeed Rana, Nils-Claudius Gellrich, Maximilian Eberhard Wagner
OBJECTIVES: Orbital surgery is a challenging procedure because of its complex anatomy. Training could especially benefit from dedicated study models. The currently available devices lack sufficient anatomical representation and realistic soft tissue properties. Hence, we developed a 3D-printed simulation device for orbital surgery with tactual (haptic) correct simulation of all relevant anatomical structures. DESIGN, SETTING, AND PARTICIPANTS: Based on computed tomography scans collected from patients treated in a third referral center, the hard and soft tissue were segmented and virtually processed to generate a 3D-model of the orbit...
January 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/27980324/short-implants-had-lower-survival-rates-in-posterior-jaws-compared-to-standard-implants
#10
Gary L Stafford
Data sourcesPubMed/Medline, Embase and Cochrane Library databases supplemented by searches of the journals; Clinical Implant Dentistry and Related Research, Clinical Oral Implants Research, International Journal of Oral and Maxillofacial Implants, International Journal of Oral and Maxillofacial Surgery, Journal of Clinical Periodontology, Journal of Dentistry, Journal of Oral and Maxillofacial Surgery, Journal of Oral Implantology, Journal of Oral Rehabilitation, Journal of Periodontology, Periodontology 2000...
December 2016: Evidence-based Dentistry
https://www.readbyqxmd.com/read/27978808/molecular-cellular-and-pharmaceutical-aspects-of-biomaterials-in-dentistry-and-oral-and-maxillofacial-surgery-an-internationalization-of-higher-education-and-research-perspective
#11
Lidia M Wisniewska, David M Dohan Ehrenfest, Pablo Galindo-Moreno, Jesús Domingo Segovia, Francesco Inchingolo, Hom-Lay Wang, Manuel Fernándes-Cruz
In dentistry and oral and maxillofacial surgery, the development of implantable biomaterials and the understanding of their molecular, cellular and pharmaceutical aspects are currently major fields of research and education, with a considerable impact on the daily clinical practice and the evolution of therapeutic strategies. In the era of globalized economy of knowledge and science, this scientific domain needs the development of global cooperation and a paradigm evolution in the organizational culture of the dental sciences and related dental industry...
December 13, 2016: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/27966517/characterization-of-an-eye-prosthesis-using-monopoly-syrup
#12
Pinki Bankoti, M K Singhal, Chandana Nair, Praveen Chandra
The eye is a vital organ and an important component of facial expression. Loss of an eye has a crippling effect on the psychology of the patient. Maxillofacial prostheses restore and replace stomatognathic and associated facial structures with artificial substitutes. The objectives of eye prosthesis is to improve the patient esthetics, restore and maintain the health of the remaining associated structures, consequently provide physical and mental well-being. The primary purpose of an ocular prosthesis is to maintain the volume of eye socket and create the illusion of a healthy eye and surrounding tissue...
September 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/27898165/sinus-augmentation-and-simultaneous-implant-placement-success-pilot-study-2008-2011
#13
Melissa Tormos, Jose Morales, Natalia Guevara, Augusto R Elías, Lydia López, Omar García
OBJECTIVE: 1) To describe implant success in the posterior maxillary when a sinus augmentation procedure was performed simultaneously with implant placement and then compare differences in success when sinus augmentation was delayed in patients attending the maxillofacial surgery clinic of the University of Puerto Rico, 2008 through 2011. 2) To determine sociodemographic characteristics, ASA classification, graft material, and final restoration and, using a questionnaire, determine as well patient satisfaction...
December 2016: Puerto Rico Health Sciences Journal
https://www.readbyqxmd.com/read/27882311/retrospective-clinical-study-of-an-implant-with-a-sandblasted-large-grit-acid-etched-surface-and-internal-connection-analysis-of-short-term-success-rate-and-marginal-bone-loss
#14
Jae-Wang Lee, Jun Hyeong An, Sang-Hoon Park, Jong-Hyon Chong, Gwang-Seok Kim, JeongJoon Han, Seunggon Jung, Min-Suk Kook, Hee-Kyun Oh, Sun-Youl Ryu, Hong-Ju Park
BACKGROUND: The purpose of this retrospective study was to evaluate the clinical utility of an implant with a sandblasted, large-grit, acid-etched (SLA) surface and internal connection. METHODS: Six patients who received dental implants in the Department of Oral and Maxillofacial Surgery, Chonnam National University Dental Hospital, were analyzed by factors influencing the success rate and marginal bone loss. Factors included patient's age, sex, implant installation site, whether bone graft was done, type of bone graft materials, approaching method if sinus lift was done, and the size of the fixture...
December 2016: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27843652/implant-retained-obturator-for-an-edentulous-patient-with-a-hemimaxillectomy-defect-complicated-with-microstomia
#15
Pravinkumar G Patil, Smita Nimbalkar-Patil
Patient. A 68-year-old man was operated on for squamous cell carcinoma (T3N3M0) of the maxilla creating the hemimaxillary surgical defect on right side. The remaining arch was completely edentulous. There was remarkable limitation in the oral opening with reduced perimeter of the oral cavity due to radiation and surgical scar contracture. This article describes prosthetic rehabilitation by modifying the design of the obturator and achieving the retention with dental implant. Discussion. Severe limitation in the oral opening may occur in clinical situations following the postsurgical management of oral and maxillofacial defects...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27842482/antibiotic-release-from-calcium-phosphate-materials-in-oral-and-maxillofacial-surgery-molecular-cellular-and-pharmaceutical-aspects
#16
Angel Manchon, Juan Carlos Prados-Frutos, Carmen Rueda Rodriguez, Carmen Salinas Goodier, Mohammad Hadman Alkhraisat, Rosa Rojo, Arantza Rodriguez Gonzalez, Ana Berlanga, Enrique Lopez Cabarcos
Calcium phosphate materials (CPM) are widely used in dentistry and maxillofacial surgery. The presence of microbial biofilms and external infections are responsible for the failure of many procedures of dental implants and bone grafts. In an attempt to reduce the percentage of these infectious processes antibiotics have been associated with CPM improving certain conditions. For instance antibiotics administered orally or intravenously have less effect and the blood flow in relation to this is poor near implants and grafts...
November 14, 2016: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/27836141/biocompatibility-of-primers-and-an-adhesive-used-for-implant-retained-maxillofacial-prostheses-an-in%C3%A2-vitro-analysis
#17
Liliane da Rocha Bonatto, Marcelo Coelho Goiato, Emily Vivianne Freitas da Silva, Sandra Helena Penha Oliveira, Marcela Filié Haddad, Antônio Hernandes Chaves Neto, Victor Gustavo Balera Brito, Daniela Micheline Dos Santos
STATEMENT OF PROBLEM: Implant-retained maxillofacial prostheses should be biocompatible, regardless of the primers and adhesives used to bond the acrylic resin and facial silicone. The authors are unaware of any study evaluating the influence of these primers and adhesives on the biocompatibility of maxillofacial prostheses. PURPOSE: The purpose of this in vitro study was to evaluate the cytotoxic effect of primers and an adhesive used to bond acrylic resin and facial silicone during the fabrication of implant-retained maxillofacial prostheses...
November 8, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27826386/postoperative-irradiation-after-implant-placement-a-pilot-study-for-prosthetic-reconstruction
#18
Re-Mee Doh, Sungtae Kim, Ki Chang Keum, Jun Won Kim, June-Sung Shim, Han-Sung Jung, Kyeong-Mee Park, Moon-Kyu Chung
PURPOSE: On maxillofacial tumor patients, oral implant placement prior to postoperative radiotherapy can shorten the period of prosthetic reconstruction. There is still lack of research on effects of post-implant radiotherapy such as healing process or loading time, which is important for prosthodontic treatment planning. Therefore, this study evaluated the effects of post-implant local irradiation on the osseointegration of implants during different healing stages. MATERIALS AND METHODS: Custom-made implants were placed bilaterally on maxillary posterior edentulous area 4 weeks after extraction of the maxillary first molars in Forty-eight Sprague-Dawley rats...
October 2016: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/27810548/immediate-transoral-allogeneic-bone-grafting-for-large-mandibular-defects-less-morbidity-more-bone-a-paradigm-in-benign-tumor-mandibular-reconstruction
#19
James C Melville, Nader N Nassari, Issa A Hanna, Jonathan W Shum, Mark E Wong, Simon Young
PURPOSE: Reconstruction of hard tissue continuity defects caused by ablative tumor surgery has been traditionally reconstructed with autogenous bone grafts or microvascular free flaps. Although results have been predictable from these 2 methods of reconstruction, the morbidity associated with bone harvest is quite serious for the patient. Predictable results have been obtained with using a combination of 100% cadaver bone, bone marrow aspirate concentrate (BMAC), and recombinant human bone morphogenic protein in immediate reconstruction for benign tumor extirpations through the extraoral approach...
October 6, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27806758/-biological-evaluation-of-three-dimensional-printed-co-poly-lactic-acid-glycolic-acid-tri-calcium-phosphate-scaffold-for-bone-reconstruction
#20
S Y Li, M Zhou, Y X Lai, Y M Geng, S S Cao, X M Chen
Objective: To biologically evaluate the three-dimensional(3D) printed co-poly lactic acid/glycolic acid/tri-calcium phosphate(PLGA/TCP) scaffold which could be used for repairing oral and maxillofacial bone defects, and to provide experimental evidence for its further research and clinical application. Methods: PLGA/TCP scaffolds were fabricated using low temperature rapid prototyping technique. Micro-CT and scanning electron microscope(SEM) were used to characterize the surface morphology. MC3T3-E1 cells were seeded onto the scaffold and stained with the rhodamine phalloidin and calcein acetomethoxy...
November 9, 2016: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
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