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Ridge preservation

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https://www.readbyqxmd.com/read/29763499/flap-management-in-alveolar-ridge-preservation-a-systematic-review-and-meta-analysis
#1
Jungwon Lee, Jun-Beom Lee, Ki-Tae Koo, Yang-Jo Seol, Yong-Moo Lee
PURPOSE: This systematic review aimed to identify the effects of certain flap management procedures on ridge preservation on the basis of existing literature. MATERIALS AND METHODS: Electronic (MEDLINE, EMBASE, and Cochrane Central Register of controlled trials) and manual searches of the literature were conducted until February 2017. Randomized controlled trials (RCTs), controlled clinical trials (CCTs), and prospective cohort studies that involved at least 10 subjects were eligible for this systematic review...
May 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29756213/the-influence-of-different-soft-tissue-grafting-procedures-at-single-implant-placement-on-esthetics-a-randomized-controlled-trial
#2
Elise G Zuiderveld, Henny J A Meijer, Arjan Vissink, Gerry M Raghoebar
BACKGROUND: Soft tissue grafting to thicken the soft tissue around dental implants was proposed to ameliorate the esthetic outcome. Traditionally, connective tissue is used as a grafting material, but a xenogeneic collagen matrix was introduced as an alternative to reduce patient morbidity. METHODS: Sixty patients randomly received either no graft (n = 20, NG group), a connective tissue graft (n = 20, CTG group) or a xenogeneic collagen matrix (n = 20, XCM group) when placing an implant in a preserved alveolar ridge...
May 13, 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29738746/histological-and-histomorphometric-response-to-socketkap%C3%A2-and-socketkage%C3%A2-used-for-ridge-preservation-and-repair-results-from-a-randomized-controlled-clinical-trial
#3
Neema Bakhshalian, Alaa Abdelhamid, Yoon Jeong Park, Homayoun H Zadeh
PURPOSE: This study investigated the histologic tissue response to SocketKAP and SocketKAGE as novel devices designed for ridge preservation. MATERIALS AND METHODS: This randomized controlled clinical trial recruited participants from among patients who presented to a university dental clinic. The study protocol entailed randomization into 5 intervention groups after tooth extraction: unassisted healing of intact sockets (group A), SocketKAP (group B), anorganic bovine bone minerals (ABBM) plus SocketKAP (group C), unassisted healing of sockets with dehiscence (group D), and SocketKAGE plus ABBM plus SocketKAP (group E)...
April 12, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29692564/effects-of-mangosteen-peel-extract-combined-with-demineralized-freeze-dried-bovine-bone-xenograft-on-osteocalcin-collagen-1-and-osteoblast-as-alveolar-bone-regeneration-in-socket-preservation
#4
Utari Kresnoadi, Tika Raharjo, Rostiny Rostiny
Background: Tooth extraction will provoke changes in alveolar bone morphology and dimensions. Postextraction bone resorption can lead to significant problems for restorative dentistry. Therefore, the extracted tooth socket needs to be preserved to reduce alveolar ridge bone resorption. This research aimed to analyze the expression and levels of osteocalcin, collagen 1, and osteoblasts in extracted tooth sockets filled with a combination of mangosteen peel extract and demineralized freeze-dried bovine bone xenograft (DFDBBX)...
April 2018: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/29683498/advanced-platelet-rich-fibrin-and-freeze-dried-bone-allograft-for-ridge-preservation-a-randomized-controlled-clinical-trial
#5
Daniel Clark, Yogalakshmi Rajendran, Sarmad Paydar, Sunita Ho, Darren Cox, Mark Ryder, John Dollard, Richard T Kao
BACKGROUND: Advanced platelet-rich fibrin (A-PRF) is an autogenous blood product with applications in dento-alveolar surgery. However, there is minimal information regarding its optimal clinical application or efficacy. The aim of this multi-arm parallel randomized controlled clinical trial was to evaluate the efficacy of A-PRF alone or with freeze-dried bone allograft (FDBA) in improving vital bone formation and alveolar dimensional stability during ridge preservation. METHODS: Forty patients requiring extraction of non-molar teeth and replacement with dental implants were randomized into one of four ridge preservation approaches: A-PRF, A-PRF+FDBA, FDBA, or blood clot...
April 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29651455/fossil-scales-illuminate-the-early-evolution-of-lepidopterans-and-structural-colors
#6
Qingqing Zhang, Wolfram Mey, Jörg Ansorge, Timothy A Starkey, Luke T McDonald, Maria E McNamara, Edmund A Jarzembowski, Wilfried Wichard, Richard Kelly, Xiaoyin Ren, Jun Chen, Haichun Zhang, Bo Wang
Lepidopteran scales exhibit remarkably complex ultrastructures, many of which produce structural colors that are the basis for diverse communication strategies. Little is known, however, about the early evolution of lepidopteran scales and their photonic structures. We report scale architectures from Jurassic Lepidoptera from the United Kingdom, Germany, Kazakhstan, and China and from Tarachoptera (a stem group of Amphiesmenoptera) from mid-Cretaceous Burmese amber. The Jurassic lepidopterans exhibit a type 1 bilayer scale vestiture: an upper layer of large fused cover scales and a lower layer of small fused ground scales...
April 2018: Science Advances
https://www.readbyqxmd.com/read/29649725/production-of-live-fish-derived-from-frozen-germ-cells-via-germ-cell-transplantation
#7
Goro Yoshizaki, Seungki Lee
The conservation of endangered fish is an urgent issue. Although cryo-banking of fish gametes might ultimately help conserve endangered fish, cryopreservation of fish eggs or embryos is still not possible due to their large size and high yolk content. Therefore, as an alternative, we focused on undifferentiated germ cells, such as primordial germ cells, spermatogonia, and oogonia, as materials for cryopreservation. Transplantation of cryopreserved germ cells into the body cavity of allogeneic or xenogeneic recipients sterilized by triploidization or endogenous germ cell ablation resulted in migration of the transplanted germ cells toward the recipient genital ridges, where they were eventually incorporated...
April 3, 2018: Stem Cell Research
https://www.readbyqxmd.com/read/29617179/sclerostin-and-dkk1-inhibition-preserves-and-augments-alveolar-bone-volume-and-architecture-in-rats-with-alveolar-bone-loss
#8
M Liu, P Kurimoto, J Zhang, Q T Niu, M Stolina, P C Dechow, J Q Feng, J Hesterman, M D Silva, M S Ominsky, W G Richards, H Ke, P J Kostenuik
Alveolar bone is a mechanosensitive tissue that provides structural support for teeth. Alveolar bone loss is common with aging, menopause, tooth loss, and periodontitis and can lead to additional tooth loss, reduced denture fixation, and challenges in placing dental implants. The current studies suggest that sclerostin and DKK1, which are established osteocyte-derived inhibitors of bone formation, contribute to alveolar bone loss associated with estrogen ablation and edentulism in rats. Estrogen-deficient ovariectomized rats showed significant mandibular bone loss that was reversed by systemic administration of sclerostin antibody (SAB) alone and in combination with DKK1 antibody (DAB)...
April 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29607553/combined-use-of-xenogeneic-bone-substitute-material-covered-with-a-native-bilayer-collagen-membrane-for-alveolar-ridge-preservation-a-randomized-controlled-clinical-trial
#9
Ronald E Jung, Vitor M Sapata, Christoph H F Hämmerle, Hui Wu, Xiu-Lian Hu, Ye Lin
AIM: The aim of this split-mouth randomized controlled study was to evaluate radiographic dimensional changes after tooth extraction in posterior sites treated with a ridge preservation technique or left for spontaneous healing. MATERIALS AND METHODS: In a total of 18 patients, tooth extraction in posterior sites of the upper and lower jaw was performed in a split-mouth design. The post-extraction sockets were randomly assigned to the following two treatment modalities: deproteinized bovine bone mineral (DBBM) with 10% collagen (DBBM-C) covered with a native bilayer collagen membrane (NBCM) (test group) and spontaneous healing (control group)...
April 1, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29607264/postcranial-skeletal-anatomy-of-the-holotype-and-referred-specimens-of-buitreraptor-gonzalezorum-makovicky-apestegu%C3%A3-a-and-agnol%C3%A3-n-2005-theropoda-dromaeosauridae-from-the-late-cretaceous-of-patagonia
#10
Federico A Gianechini, Peter J Makovicky, Sebastián Apesteguía, Ignacio Cerda
Here we provide a detailed description of the postcranial skeleton of the holotype and referred specimens of Buitreraptor gonzalezorum . This taxon was recovered as an unenlagiine dromaeosaurid in several recent phylogenetic studies and is the best represented Gondwanan dromaeosaurid discovered to date. It was preliminarily described in a brief article, but a detailed account of its osteology is emerging in recent works. The holotype is the most complete specimen yet found, so an exhaustive description of it provides much valuable anatomical information...
2018: PeerJ
https://www.readbyqxmd.com/read/29599585/simvastatin-effects-on-dental-socket-quality-a-comparative-study
#11
Mehdi Sezavar, Behnam Bohlouli, Sareh Farhadi, Shiva Tabatabaee, Reza Latifi
Background: The shrinkage of the alveolar ridge might be minimized by the ridge preservation stages and applied alloplasts, after tooth extraction. According to studies on statins, angiogenesis and osteogenesis are observed as a topical application of these drugs. Objectives: The aim of this study is to the application of simvastatin in terms of bone regeneration of the alveolar ridge after tooth extraction. Materials and Methods: This study assessed this issue through the split-mouth method which assessed 10 dental sockets filled with simvastatin and collagen and 10 others filled just by collagen postextraction...
January 2018: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29588881/orbitopterional-approach-for-the-resection-of-a-suprasellar-craniopharyngioma-adapting-the-strategy-to-the-microsurgical-and-pathologic-anatomy
#12
Vincent Nguyen, Jaafar Basma, Paul Klimo, Jeffrey Sorenson, L Madison Michael
Objectives  To describe the orbitopterional approach for the resection of a suprasellar craniopharyngioma with emphasis on the microsurgical and pathological anatomy of such lesions. Design  After completing the orbitopterional craniotomy in one piece including a supraorbital ridge osteotomy, the Sylvian fissure was split in a distal to proximal direction. The ipsilateral optic nerve and internal carotid artery were identified. Establishing a corridor to the tumor through both the opticocarotid and optic cisterns allowed for a wide angle of attack...
April 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29576913/current-management-of-scaphoid-nonunion-based-on-the-biomechanical-study
#13
Kunihiro Oka, Hisao Moritomo
Scaphoid nonunion causes abnormal wrist kinematics and typically leads to carpal collapse and subsequent degenerative arthritis of the wrist. However, the natural history, including carpal collapse and degenerative arthritis of scaphoid nonunion, may vary at different fracture locations. This article reviews recent biomechanical studies related to the natural history of scaphoid nonunion. In the distal-type fractures (type B2 in Herbert classification), where the fracture located distal to the scaphoid apex, the proximal scaphoid fragment and lunate, which are connected through the dorsal scapholunate interosseous ligament (DSLIL) and dorsal intercarpal ligament (DIC), extend together, and the distal fragment of the scaphoid flexes individually...
April 2018: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/29569754/evaluation-of-a-bone-substitute-covered-with-a-collagen-membrane-for-ridge-preservation-after-tooth-extraction-clinical-and-tomographic-randomized-controlled-study-in-humans
#14
Felipe Anderson Sousa Nunes, Túlio B Pignaton, Arthur B Novaes, Mário Taba, Michel R Messora, Daniela B Palioto, Rubens Spin-Neto, Sérgio Luís Scombatti de Souza
OBJECTIVE: To evaluate the use of a synthetic bone substitute covered with a collagen membrane for ridge preservation after tooth extraction, by clinical and tomographic analysis. MATERIAL AND METHODS: Fifteen patients, presenting at least two maxillary anterior teeth indicated for extraction, were selected: in the test group (TG), post-extraction sockets were filled by a synthetic bone substitute; in the control group (CG), by blood clot. In both groups, the sockets were covered by a collagen membrane...
March 23, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29558684/facial-preservation-following-extreme-mummification-shrunken-heads
#15
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
https://www.readbyqxmd.com/read/29531969/blood-vessel-segmentation-in-modern-wide-field-retinal-images-in-the-presence-of-additive-gaussian-noise
#16
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
https://www.readbyqxmd.com/read/29520023/volcanic-ash-as-a-driver-of-enhanced-organic-carbon-burial-in-the-cretaceous
#17
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
https://www.readbyqxmd.com/read/29513525/zwitterion-like-charge-balanced-ultrathin-layers-on-polymeric-membranes-for-antifouling-property
#18
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 in polymeric substrates are strictly constrained by current constructing strategies. 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-methylpropanesulfonic acid (AMPS) and methacryloxyethyltrimethylammonium chloride (DMC), were directly mixed-grafted with amino groups on PA RO membrane surface via Michael addition...
April 3, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29508553/biocompatibility-and-osteoconductivity-of-plcl-coated-and-noncoated-xenografts-an-in-vitro-and-preclinical-trial
#19
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
https://www.readbyqxmd.com/read/29508445/esthetics-in-periodontics-and-implantology
#20
REVIEW
Giovanni Zucchelli, Praveen Sharma, 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...
June 2018: Periodontology 2000
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