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Ridge preservation

Tobias M R Houlton, Caroline Wilkinson
Shrunken heads are a mummification phenomenon unique to South America. Ceremonial tsantsa are ritually reduced heads from enemy victims of the Shuar, Achuar, Awajún (Aguaruna), Wampís (Huambisa), and Candoshi-Shapra cultures. Commercial shrunken heads are comparatively modern and fraudulently produced for the curio-market, often using stolen bodies from hospital mortuaries and graves. To achieve shrinkage and desiccation, heads undergo skinning, simmering (in water) and drying. Considering the intensive treatments applied, this research aims to identify how the facial structure can alter and impact identification using post-mortem depiction...
March 6, 2018: Forensic Science International
Morteza Modarresi Asem, Iman Sheikh Oveisi, Mona Janbozorgi
Retinal blood vessels indicate some serious health ramifications, such as cardiovascular disease and stroke. Thanks to modern imaging technology, high-resolution images provide detailed information to help analyze retinal vascular features before symptoms associated with such conditions fully develop. Additionally, these retinal images can be used by ophthalmologists to facilitate diagnosis and the procedures of eye surgery. A fuzzy noise reduction algorithm was employed to enhance color images corrupted by Gaussian noise...
July 2018: Journal of Medical Imaging
Cin-Ty A Lee, Hehe Jiang, Elli Ronay, Daniel Minisini, Jackson Stiles, Matthew Neal
On greater than million year timescales, carbon in the ocean-atmosphere-biosphere system is controlled by geologic inputs of CO2 through volcanic and metamorphic degassing. High atmospheric CO2 and warm climates in the Cretaceous have been attributed to enhanced volcanic emissions of CO2 through more rapid spreading at mid-ocean ridges and, in particular, to a global flare-up in continental arc volcanism. Here, we show that global flare-ups in continental arc magmatism also enhance the global flux of nutrients into the ocean through production of windblown ash...
March 8, 2018: Scientific Reports
Saisai Lin, Yin Li, Lin Zhang, Shengfu Chen, Li'an Hou
Zwitterions of charge-balanced units have super-low fouling properties induced by ionic solvation, but their extensive applications on polymeric substrates are strictly constrained by current constructing strategies. In this work, a zwitterion-like, charge-balanced ultrathin layer with high antifouling capacity was covalently constructed on delicate aromatic polyamide (PA) reverse osmosis (RO) membranes via a mild and solvent-free grafting-to strategy. Two oppositely charged commercial short-chain carbonyl alkenes, 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and methacryloxyethyltrimethyl ammonium chloride (DMSDMC), were directly mixed-grafted with amino groups on PA RO membrane surface via Michael addition...
March 7, 2018: Environmental Science & Technology
Yaniv Mayer, Ofir Ginesin, Alaa Khutaba, Eli E Machtei, Hadar Zigdon Giladi
BACKGROUND: Cells, scaffolds, and growth factors are the key components in bone tissue engineering. Scaffold composition, topography, and architecture influence the amount of regenerated bone in the implantation site. The aims of the study were to compare viability and proliferation of mesenchymal stem cells (MSCs) seeded onto two commercial xenografts: Bio-Oss (BO) and bioactive bone bovine (BB). Next, these materials were compared for histomorphometric bone formation in a socket preservation model in rats...
March 6, 2018: Clinical Implant Dentistry and related Research
Giovanni Zucchelli, Sharma Praveen, Ilham Mounssif
Periodontal plastic surgery comprises an increasing part of clinical periodontology. Clinical trials have traditionally used professionals to judge esthetic outcome, and few studies have addressed patient needs and requests (true end points). Development of universally accepted and validated methods for professional esthetic assessment, together with standardized questionnaires for patient-perceived outcome, may help to provide better insights into the true needs and benefits of periodontal and implant-associated plastic surgery...
March 5, 2018: Periodontology 2000
Otto Zuhr, Stephan F Rebele, Stefani L Cheung, Markus B Hürzeler
Diverse clinical advancements, together with some relevant technical innovations, have led to an increase in popularity of tunneling flap procedures in plastic periodontal and implant surgery in the recent past. This trend is further promoted by the fact that these techniques have lately been introduced to a considerably expanded range of indications. While originally described for the treatment of gingival recession-type defects, tunneling flap procedures may now be applied successfully in a variety of clinical situations in which augmentation of the soft tissues is indicated in the esthetic zone...
March 1, 2018: Periodontology 2000
Peter Fairbairn, Minas Leventis, Chas Mangham, Robert Horowitz
This case report highlights the use of a novel in situ hardening synthetic (alloplastic), resorbable, bone grafting material composed of beta tricalcium phosphate and calcium sulfate, for alveolar ridge preservation. A 35-year-old female patient was referred by her general dentist for extraction of the mandibular right first molar and rehabilitation of the site with a dental implant. The nonrestorable tooth was "atraumatically" extracted without raising a flap, and the socket was immediately grafted with the synthetic biomaterial and covered with a hemostatic fleece...
2018: Case Reports in Dentistry
Ronald E Jung, Alexis Ioannidis, Christoph H F Hämmerle, Daniel S Thoma
In the esthetic zone, in the case of tooth extraction, the clinician is often confronted with a challenge regarding the optimal decision-making process for providing a solution using dental implants. This is because, after tooth extraction, alveolar bone loss and structural and compositional changes of the covering soft tissues, as well as morphological alterations, can be expected. Ideally, the therapeutic plan starts before tooth extraction and it offers three options: spontaneous healing of the extraction socket; immediate implant placement; and techniques for preserving the alveolar ridge at the site of tooth removal...
February 27, 2018: Periodontology 2000
Victor Tu, Satish Kumar
ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Alveolar ridge preservation after tooth extraction: a Bayesian Network meta-analysis of grafting materials efficacy on prevention of bone height and width reduction. Iocca O, Farcomeni A, Pardiñas Lopez S, Talib HS. J Clin Periodontol 2017; 44(1):104-14. SOURCE OF FUNDING: Self-funded by the authors and their institutions TYPE OF STUDY/DESIGN: Meta-analysis and Bayesian network meta-analysis.
March 2018: Journal of Evidence-based Dental Practice
Yingdi Zhang, Zheng Ruan, Minhua Shen, Luanjun Tan, Weiqin Huang, Lei Wang, Yuanliang Huang
The aim of the present study was to evaluate the clinical efficacy of platelet-rich fibrin (PRF) in preserving the alveolar ridge following human tooth extraction. A total of 28 patients were divided into two groups: The experimental and control groups (n=14 each). Following tooth extraction, the experimental group was implanted with PRF membrane, whereas the control group was not. The gingival healing effect was assessed at 7 days, 1 and 3 months later. Cone-beam computed tomography was performed immediately and at 3 months following tooth extraction...
March 2018: Experimental and Therapeutic Medicine
Mihir Raghavendra Kulkarni, Purva Vijay Bakshi, Abhishek Somanath Kavlekar, Srinath Lakshman Thakur
Abrams's palatal roll technique has been used extensively to augment peri-implant soft tissues in the maxillary esthetic zone and has seen numerous modifications. An adaptation of the palatal roll technique is described here and its simplicity of application in three different scenarios is demonstrated. At second-stage implant surgery, a partial thickness initial incision followed by a palatal subepithelial dissection at the site of implant was done and a connective tissue graft with a buccal pedicle was obtained...
July 2017: Journal of Indian Society of Periodontology
Stefen Koubi, Galip Gurel, Patrice Margossian, Richard Massihi, Herve Tassery
Treatment of tooth wear has increased over the last two decades. However, the treatments involved have not been satisfactory to most patients, nor have they achieved the expected goal on some worn teeth. New approaches have emerged to reconstruct full arches in a minimally invasive way that take advantage of developments in the field of adhesive dentistry. These new concepts constitute a revolution in dentistry and their application requires adapted techniques and training. The purpose of this article is to suggest a precise and reproducible method that simplifies the treatment of worn dentition...
March 2018: International Journal of Periodontics & Restorative Dentistry
N Girish Kumar, Rupanzal Chaudhary, Ish Kumar, Srimathy S Arora, Nilesh Kumar, Hem Singh
AIM: The purpose of this study is to evaluate the efficacy of Platelet Rich Fibrin (PRF) as a socket plug with or without use of Plaster of Paris (POP) as bone substitute to preserve the alveolar ridge post-extraction. MATERIAL AND METHODS: A prospective randomised single blind controlled study, was conducted for 18 months from November 2014 to May 2016 on 48 patients requiring extraction. All teeth were extracted atraumatically using periotomes and luxators without raising mucoperiosteal flap...
February 6, 2018: Oral and Maxillofacial Surgery
Neda Moslemi, Vahid Khoshkam, Sahar Rafiee, Naghmeh Bahrami, Hoori Aslroosta
PURPOSE: The main focused question of this systematic review was as follows: Does the application of recombinant human bone morphogenetic protein-2 (rhBMP-2) placed in extraction sockets reduce the alveolar ridge changes? METHODS: A systematic literature search was performed up to February 2017. Clinical studies published in English were included. Outcome variables of interest were as follows: changes in alveolar ridge width and height, the quality of new bone, patient's safety, adverse events, and postoperative complications...
February 1, 2018: Implant Dentistry
Jeff H Bynum
Achieving successful long-term esthetic outcomes in implant dentistry requires that the height and width of the facial or buccal alveolar bone wall and, subsequently, the peri-implant tissues be maintained. Partial extraction therapy (PET) can be used to reduce the risk of facio-lingual collapse after tooth loss and improve the preservation of alveolar bone height and blood supply. This article demonstrates the use of PET for treatment of a hopeless tooth in the esthetic zone. After removal of the fractured maxillary central incisor, an implant was placed and restored with excellent esthetic, functional, and periodontal results...
February 2018: Compendium of Continuing Education in Dentistry
Liping Zhao, Tao Xu, Wenjie Hu, Kwok-Hung Chung
BACKGROUND: Studies of the extracted infected-molar ridge preservation are limited. PURPOSE: To compare alterations of hard and soft tissue in infected-molar sockets receiving ridge preservation compared with natural healing. MATERIALS AND METHODS: Thirty-five infected-molar extraction sites either preserving with Bio-Gide membrane covered the Bio-Oss material or receiving natural healing procedure as controls. The soft tissue profile was evaluated before tooth extraction and after 6-month healing...
January 29, 2018: Clinical Implant Dentistry and related Research
Laura K Uribe-Fentanes, Fernando Soriano-Padilla, Jorge Raúl Pérez-Frutos, Miriam Alejandra Veras-Hernandez
BACKGROUND: Calendula officinalis is a phytodrug used as analgesic, antiseptic and wound-healing agent due to its collagenogenic effect, which is why it is a convenient and affordable treatment that promotes alveolar bone preservation after tooth extraction in vivo. The aim of this study was to use Calendula officinalis during and after tooth extraction to determine its ability to preserve bone after this procedure. METHODS: We established two groups matched by age, gender and position of the third molar...
January 2018: Revista Médica del Instituto Mexicano del Seguro Social
Andrea Bartoli, Jean H Fasel, Karl Schaller, Max Jägersberg
BACKGROUND: Repair of the anterior skull base for cerebrospinal fluid leak requires either endoscopic endonasal approach or open transcranial approach. OBJECTIVE: To present a less invasive surgical procedure for sealing of the entire anterior fossa floor for traumatic rhinoliquorrhea. METHODS: Cadaver study in 3 head specimens. Endoscopic placement of a furled bovine pericardial patch bilaterally along the sphenoid ridge and planum in guidewire technique...
February 1, 2018: Operative Neurosurgery (Hagerstown, Md.)
Charles Schwimer, Gregory A Pette, Howard Gluckman, Maurice Salama, Jonathan Du Toit
The socket-shield technique described 7 years ago has since grown in its reporting in the literature as a valid method of ridge preservation at immediate implant placement. To date, large clinical cohorts with up-to-4-year follow-up have been reported. Additionally, evidence of tissue histology at the dental implant and socket-shield has been demonstrated in the animal model. However, human histologic evidence has not yet been available, and the clinician's uncertainty regarding the tissues that may form between the socket-shield and dental implant may remain unanswered until now...
January 2018: International Journal of Oral & Maxillofacial Implants
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