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Ridge preservation

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https://www.readbyqxmd.com/read/28303642/efficacy-of-collagen-matrix-seal-and-collagen-sponge-on-ridge-preservation-in-combination-with-bone-allograft-a-randomized-controlled-clinical-trial
#1
Zuhair S Natto, Andreas Parashis, Bjorn Steffensen, Rumpa Ganguly, Matthew D Finkelman, Y Natalie Jeong
AIM: To test whether the use of collagen matrix seal (CMS) results in similar hard and soft tissue remodeling to that with collagen sponge (CS) used as barriers 4 months following alveolar ridge preservation (ARP), in combination with freeze-dried bone allograft (FDBA). MATERIALS AND METHODS: Twenty-eight patients were randomly assigned to the two groups. Clinical and radiographic measurements were recorded with the same stent at baseline and 4 months for standardization...
March 16, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28298826/alveolar-ridge-preservation-using-autogenous-tooth-graft-versus-beta-tricalcium-phosphate-alloplast-a-randomized-controlled-prospective-clinical-pilot-study
#2
Chaitanya Pradeep Joshi, Nitin Hemchandra Dani, Smita Uday Khedkar
BACKGROUND: A randomized, prospective clinical, radiographical, and histological study was conducted to evaluate healing after alveolar ridge preservation technique using two different graft materials, namely, a novel autogenous graft material i. e., autogenous tooth graft (ATG) and beta-tricalcium phosphate (β-TCP) alloplast. MATERIALS AND METHODS: Fifteen patients undergoing extraction of at least three teeth were selected. Atraumatic extractions were performed...
July 2016: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/28294198/external-and-internal-resin-infiltration-of-natural-proximal-subsurface-caries-lesions-a-valuable-enhancement-of-the-internal-tunnel-restoration
#3
Andrej M Kielbassa, Ina Ulrich, Vanessa D Werth, Christoph Schüller, Wilhelm Frank, Rita Schmidl
OBJECTIVE: The aim of this ex-vivo study was to evaluate both the external and the internal penetration ability of a resin infiltrant into natural proximal and macroscopically intact white spot lesions, and to merge this approach with the internal tunnel preparation concept. METHOD AND MATERIALS: 20 premolars and 20 molars with proximal subsurface lesions (ICDAS, code 2) and respective radiographic lesion depths extending into the middle third of dentin (D2 lesions) were selected and divided into two groups...
March 14, 2017: Quintessence International
https://www.readbyqxmd.com/read/28261524/a-comparison-of-different-compressive-forces-on-graft-materials-during-alveolar-ridge-preservation
#4
In-Woo Cho, Jung-Chul Park, Hyun-Seung Shin
PURPOSE: Following tooth extraction, alveolar ridge preservation (ARP) can maintain the dimensions of ridge height and width. Although previous studies have demonstrated the effects of ARP, few if any studies have investigated the compressive force applied during grafting. The aim of this study was to determine the effects of different compressive forces on the graft materials during ARP. METHODS: After tooth extraction, sockets were filled with deproteinized bovine bone mineral with 10% porcine collagen and covered by a resorbable collagen membrane in a double-layered fashion...
February 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28256523/production-of-the-medaka-derived-from-vitrified-whole-testes-by-germ-cell-transplantation
#5
Shinsuke Seki, Kazunari Kusano, Seungki Lee, Yoshiko Iwasaki, Masaru Yagisawa, Mariko Ishida, Tadashi Hiratsuka, Takao Sasado, Kiyoshi Naruse, Goro Yoshizaki
The medaka (Oryzias latipes) is a teleost model distinguished from other model organisms by the presence of inbred strains, wild stocks, and related species. Cryopreservation guarantees preservation of these unique biological resources. However, because of their large size, cryopreservation techniques for their eggs and embryos have not been established. In the present study, we established a methodology to produce functional gametes from cryopreserved testicular cells (TCs). Whole testes taken from medaka were cryopreserved by vitrification...
March 3, 2017: Scientific Reports
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
#6
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/28207942/effect-of-ridge-preservation-for-early-implant-placement-is-there-a-need-to-remove-the-biomaterial
#7
Daniel S Thoma, Nadja Naenni, Goran I Benic, Fernando Munoz, Christoph H F Hämmerle, Ronald E Jung
AIM: to assess i) bone regeneration around implants placed early in sites with or without ridge preservation and i) if the bone substitute material (DBBM-C) has to be removed at implant placement MATERIALS AND METHODS: In eight beagle dogs, three sites were randomly assigned to ridge preservation (DBBM-C plus collagen matrix (CMX)) (two sites; RP) or spontaneous healing (1 site; SH). Four weeks later, in one of the RP sites, dental implants were placed without removing the DBBM-C (RP1), whereas in RP2 and SH sites all non-integrated DBBM-C and/or granulation tissue was removed before implant placement and concomitant GBR...
February 16, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28203026/-histomorphometric-evaluation-of-ridge-preservation-after-molar-tooth-extraction
#8
Y L Zhan, W J Hu, T Xu, M Zhen, R F Lu
OBJECTIVE: To evaluate bone formation in human extraction sockets with absorbed surrounding walls augmented with Bio-Oss and Bio-Gide after a 6-month healing period by histologic and histomorphometric analyses. METHODS: Six fresh molar tooth extraction sockets in 6 patients who required periodontally compromised moral tooth extraction were included in this study. The six fresh extraction sockets were grafted with Bio-Oss particle covered with Bio-Gide. The 2.8 mm×6...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28196172/alveolar-ridge-preservation-with-nc-ha-and-d-ptfe-membrane-a-clinical-histologic-and-histomorphometric-study
#9
Domenica Laurito, Marco Lollobrigida, Francesca Gianno, Sandro Bosco, Luca Lamazza, Alberto De Biase
Alveolar ridge preservation has become a very common procedure following tooth extraction. This study presents a clinical, histologic, and histomorphometric analysis of postextraction bone changes using nanocrystalline hydroxyapatite (nc-HA) and exposed high-density polytetrafluoroethylene (d-PTFE) membrane. A total of 10 extraction sockets were treated. Clinical measurements were taken after tooth extraction with a customized acrylic stent to ensure the same measurement points. At 6 months, clinical measurements were repeated and bone specimens taken...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28185397/the-clinical-effectiveness-of-alveolar-ridge-preservation-in-the-maxillary-anterior-esthetic-zone-a-retrospective-study
#10
Albert Ming Hsien Lee, Choy Yoke Poon
PURPOSE: The primary aim was to investigate whether ridge preservation done at extraction will preserve at least 6 mm of alveolar ridge width in the anterior maxillary zone and obviate the need for secondary bone augmentation during implant insertion. METHODS: Sixty patients with single implants placed in the anterior maxillary zone were classified in two groups. In the test group, 40 patients underwent ridge preservation at the time of tooth extraction, while the remaining 20 patients in the control group did not...
February 10, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28166539/primordial-helium-entrained-by-the-hottest-mantle-plumes
#11
M G Jackson, J G Konter, T W Becker
Helium isotopes provide an important tool for tracing early-Earth, primordial reservoirs that have survived in the planet's interior. Volcanic hotspot lavas, like those erupted at Hawaii and Iceland, can host rare, high (3)He/(4)He isotopic ratios (up to 50 times the present atmospheric ratio, Ra) compared to the lower (3)He/(4)He ratios identified in mid-ocean-ridge basalts that form by melting the upper mantle (about 8Ra; ref. 5). A long-standing hypothesis maintains that the high-(3)He/(4)He domain resides in the deep mantle, beneath the upper mantle sampled by mid-ocean-ridge basalts, and that buoyantly upwelling plumes from the deep mantle transport high-(3)He/(4)He material to the shallow mantle beneath plume-fed hotspots...
February 6, 2017: Nature
https://www.readbyqxmd.com/read/28144945/latent-fingermark-aging-patterns-part-iii-discontinuity-index-as-one-indicator-of-degradation
#12
Josep De Alcaraz-Fossoul, Carme Barrot Feixat, Clara Carreras-Marin, Jack Tasker, Sara C Zapico, Manel Gené Badia
This article is the third in a series of reports exploring quantifiable visual parameters of the aging process of latent fingermarks. On this occasion, research is focused on the occurrence of ridge discontinuities (i.e. breakages) as a function of time. Experiment variables included type of secretion (eccrine and sebaceous), substrate (glass and plastic), and exposure to natural light (dark, shade, and direct light) over a 6 months period. Fingermarks were sequentially visualized with titanium dioxide powder, photographed, and the number of naturally occurring ridge discontinuities subsequently evaluated...
February 1, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28113531/cross-view-retrieval-via-probability-based-semantics-preserving-hashing
#13
Zijia Lin, Guiguang Ding, Jungong Han, Jianmin Wang
For efficiently retrieving nearest neighbors from large-scale multiview data, recently hashing methods are widely investigated, which can substantially improve query speeds. In this paper, we propose an effective probability-based semantics-preserving hashing (SePH) method to tackle the problem of cross-view retrieval. Considering the semantic consistency between views, SePH generates one unified hash code for all observed views of any instance. For training, SePH first transforms the given semantic affinities of training data into a probability distribution, and aims to approximate it with another one in Hamming space, via minimizing their Kullback-Leibler divergence...
September 29, 2016: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28113489/spectral-spatial-shared-linear-regression-for-hyperspectral-image-classification
#14
Haoliang Yuan, Yuan Yan Tang
Classification of the pixels in hyperspectral image (HSI) is an important task and has been popularly applied in many practical applications. Its major challenge is the high-dimensional small-sized problem. To deal with this problem, lots of subspace learning (SL) methods are developed to reduce the dimension of the pixels while preserving the important discriminant information. Motivated by ridge linear regression (RLR) framework for SL, we propose a spectral-spatial shared linear regression method (SSSLR) for extracting the feature representation...
March 8, 2016: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28111211/the-drawer-like-resection-and-reconstruction-with-titanium-mesh-a-novel-surgical-technique-for-treatment-of-giant-ossifying-fibroma-in-the-maxilla
#15
Mingming Lv, Jun Li, Yi Shen, Liang Wang, Jian Sun
PURPOSE: The aim of this article is to introduce a new surgical method for the treatment of ossifying fibroma (OF) in the maxilla with dislocation of the eyeball and to evaluate the postoperative outcomes and prognosis. PATIENTS AND METHODS: Cases of maxillary OF treated with "drawer-like" resection from 2014 to 2015 were reviewed. The surgical procedure consisted of total removal of the orbital floor and most of the maxilla with preservation of the alveolar ridge immediately followed by reconstruction with titanium mesh...
December 29, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28105590/case-report-on-managing-incomplete-bone-formation-after-bilateral-sinus-augmentation-using-a-palatal-approach-and-a-dilating-balloon-technique
#16
Tobias K Boehm
BACKGROUND: Patients with resorbed edentulous alveolar ridges in the posterior maxilla often require lateral window sinus augmentation procedures prior to implant placement. Lateral window sinus augmentation procedures can produce incomplete bone augmentation as consequence of surgical and healing complications producing unusual and complex sinus anatomy. Although incomplete bone formation after sinus augmentation has been described in a previous case reports, this is the first case report that describes grafting these compromised sites prior to implant placement...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28050319/the-hidden-x-suture-a-technical-note-on-a-novel-suture-technique-for-alveolar-ridge-preservation
#17
Jung-Chul Park, Ki-Tae Koo, Hyun-Chang Lim
PURPOSE: The present study investigated the impact of 2 different suture techniques, the conventional crossed mattress suture (X suture) and the novel hidden X suture, for alveolar ridge preservation (ARP) with an open healing approach. METHODS: This study was a prospective randomized controlled clinical trial. Fourteen patients requiring extraction of the maxillary or mandibular posterior teeth were enrolled and allocated into 2 groups. After extraction, demineralized bovine bone matrix mixed with 10% collagen (DBBM-C) was grafted and the socket was covered by porcine collagen membrane in a double-layer fashion...
December 2016: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28027162/critical-issues-in-radiation-protection-knowledge-management-for-preserving-radiation-protection-research-and-development-capabilities
#18
Shaheen Azim Dewji
As a hub of domestic radiation protection capabilities, Oak Ridge National Laboratory's Center for Radiation Protection Knowledge has a mandate to develop and actuate a formal knowledge management (KM) effort. This KM approach exceeds recruitment and training efforts but focuses on formalized strategies for knowledge transfer from outgoing subject matter experts in radiation protection to incoming generations. It is envisioned that such an effort will provide one avenue for preserving domestic capabilities to support stakeholder needs in the federal government and the nuclear industry while continuing to lead and innovate in research and development on a global scale...
February 2017: Health Physics
https://www.readbyqxmd.com/read/28017140/molecular-cellular-and-pharmaceutical-aspects-of-filling-biomaterials-during-the-management-of-extraction-sockets
#19
Antonio Barone, Fortunato Alfonsia, Valentina Borgia, Giovanna Iezzi, Adriano Piattelli, Ugo Covani, Paolo Tonelli
After a tooth extraction both hard and soft tissues undergo dimensional changes. The use of a ridge preservation technique at the moment of the tooth extraction could help could help to prevent the volume loss, thus simplifying the subsequent prosthetic and/or implant therapy. Some studies were conducted in order to examine the biomaterials and the surgical technique used for ridge preservation procedures. Clinical, histological, volumetric and molecular outcomes were registered and analysed in different studies, in order to comprehend the biological events and the consequences of a socket preservation procedure and to allow the clinician to make the correct choice...
December 23, 2016: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/28000281/clinical-relevance-of-dimensional-bone-and-soft-tissue-alterations-post-extraction-in-esthetic-sites
#20
REVIEW
Vivianne Chappuis, Mauricio G Araújo, Daniel Buser
The key to achieving pleasing esthetics in implant dentistry is a thorough understanding of the biological processes driving dimensional bone and soft tissue alterations post-extraction. The aim of the present report is first to characterize the extent of bone and soft tissue changes post-extraction and second to identify potential factors influencing tissue preservation in order to facilitate successful treatment outcomes. The facial bone wall thickness has been identified as the most critical factor influencing bone resorption and can be used as a prognostic tool in order to identify sites at risk for future facial bone loss subsequent to tooth extraction...
February 2017: Periodontology 2000
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