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Ridge preservation

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https://www.readbyqxmd.com/read/28508515/extra-oral-digital-scanning-and-imaging-superimposition-for-volume-analysis-of-bone-remodeling-after-tooth-extraction-with-and-without-2-types-of-particulate-porcine-mineral-insertion-a-randomized-controlled-trial
#1
Antonio Barone, Paolo Toti, Giovan-Battista Menchini-Fabris, Giacomo Derchi, Simone Marconcini, Ugo Covani
BACKGROUND: Incorporation of bone substitute material into the extraction socket could minimize the edentulous ridge volume loss or maximize the bone formation within the healing area. PURPOSE: The aim of the study was to test the effectiveness in maintaining the volumetric contour of fresh extraction sockets grafted with or without 2 types of porcine biomaterials and covered with a resorbable barrier. MATERIALS AND METHODS: In the present multi-center single-blind randomized control trial, 55 patients underwent 1-tooth extraction, were surveyed, and randomly allocated to control- (25 sites, nat-group) or test groups (15 sites grafted with pre-hydrated collagenated cortico-cancellous porcine bone, coll-group, and 15 with cortical porcine bone, cort-group)...
May 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28489915/an-8-5-m-long-ammonite-drag-mark-from-the-upper-jurassic-solnhofen-lithographic-limestones-germany
#2
Dean R Lomax, Peter L Falkingham, Günter Schweigert, Alejandro P Jiménez
Trackways and tracemakers preserved together in the fossil record are rare. However, the co-occurrence of a drag mark, together with the dead animal that produced it, is exceptional. Here, we describe an 8.5 m long ammonite drag mark complete with the preserved ammonite shell (Subplanites rueppellianus) at its end. Previously recorded examples preserve ammonites with drag marks of < 1 m. The specimen was recovered from a quarry near Solnhofen, southern Germany. The drag mark consists of continuous parallel ridges and furrows produced by the ribs of the ammonite shell as it drifted just above the sediment surface, and does not reflect behaviour of the living animal...
2017: PloS One
https://www.readbyqxmd.com/read/28466494/comparison-of-allografts-and-xenografts-used-for-alveolar-ridge-preservation-a-clinical-and-histomorphometric-rct-in-humans
#3
Carlos Alberto Serrano Méndez, Niklaus Peter Lang, Martina Caneva, Gloria Ramírez Lemus, Gerardo Mora Solano, Daniele Botticelli
BACKGROUND: Several types of bone grafts are used in ridge preservation procedures. PURPOSE: To compare the healing of allografts and xenografts applied for alveolar ridge preservation. MATERIALS AND METHODS: Twenty volunteers in need of extraction of a single-rooted tooth prior to implant installation were randomized into two groups. One group received a deproteinized cancellous bovine bone xenograft embedded in a 10% collagen matrix and the other a demineralized freeze-dried cortical bone allograft...
May 2, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28452622/histologic-evaluation-of-wound-healing-following-ridge-preservation-with-cortical-cancellous-and-combined-cortico-cancellous-freeze-dried-bone-allograft-a-randomized-controlled-clinical-trial
#4
Randy S Demetter, Blaine G Calahan, Brian L Mealey
BACKGROUND: Cortical and cancellous mineralized freeze-dried bone allografts (FDBA) are available for use in alveolar ridge preservation after tooth extraction. There are currently no data regarding the use of a combination 50/50% cortico-cancellous FDBA compared to a 100% cortical or 100% cancellous FDBA in ridge preservation. The primary objective of this study is to dimensionally and histologically evaluate healing following ridge preservation in non-molar sites using 50/50% cortico-cancellous FDBA versus 100% cortical and 100% cancellous FDBA...
April 28, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28440741/standardized-rat-model-testing-effects-of-inflammation-and-grafting-on-extraction-healing
#5
Emily S Willett, Jingpeng Liu, Molly Berke, Peter J Giannini, Marian Schmid, Zhenshan Jia, Xiaobei Wang, Xiaoyan Wang, Kaeli Samson, Fang Yu, Dong Wang, Ali Nawshad, Richard A Reinhardt
BACKGROUND: Loss of the alveolar ridge width and height following tooth extraction is well-documented, but models to evaluate ridge preservation are neither standardized nor cost-effective. This rat model characterizes the pattern of bone turnover and inflammation after extraction and bone grafting with or without local simvastatin (SIM). METHODS: Fifty retired-breeder rats underwent extraction of the right maxillary first molar and standard surgical defect creation under inhalation/local anesthesia...
April 25, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28428174/klotho-an-anti-aging-molecule-attenuates-oxidant-induced-alveolar-epithelial-cell-mtdna-damage-and-apoptosis
#6
Seok-Jo Kim, Paul Cheresh, Mesut Eren, Renea P Jablonski, Anjana Yeldandi, Karen M Ridge, Gr Scott Budinger, Dong-Hyun Kim, Myles S Wolf, Douglas Vaughan, David W Kamp
Alveolar epithelial cell (AEC) apoptosis and inadequate repair resulting from 'exaggerated' lung aging and mitochondrial dysfunction are critical determinants promoting lung fibrosis. α-Klotho, which is an anti-aging molecule that is expressed predominantly in the kidney and secreted in the blood, can protect lung epithelial cells against hyperoxia-induced apoptosis. We reasoned that Klotho protects AEC exposed to oxidative stress in part by maintaining mitochondrial DNA (mtDNA) integrity and mitigating apoptosis...
April 20, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28422326/alveolar-ridge-dimensional-changes-following-ridge-preservation-procedure-with-novel-devices-part-3-histological-analysis-in-non-human-primate-model
#7
Yingying Su, Jianxia Tang, Seiko Min, Lijia Guo, Yitong Liu, Yilin Xie, Jimin Xiong, Songlin Wang, Mauricio G Araújo, Homayoun H Zadeh, Yi Liu
OBJECTIVES: This study sought to investigate the histological changes following tooth extraction, ridge preservation and augmentation, using novel devices designed to obturate the oral orifice of extraction sockets (SocketKAP™) and provide structural support for sockets with defective bony walls (SocketKAGE™) in a non-human primate model. MATERIAL AND METHODS: Six Macaca fascicularis were imaged by cone beam computed tomography to register their preoperative alveolar bone...
April 19, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28402351/dimensional-evaluation-of-different-ridge-preservation-techniques-a-randomized-clinical-study
#8
Stefan Fickl, Kai Fischer, Nicole Petersen, Arndt Happe, Markus Schlee, Ulrich Schlagenhauf, Moritz Kebschull
The objective of this study was to quantitatively determine ridge contour changes after different alveolar ridge preservation techniques. An initial total of 40 patients provided a final total of 35 single-gap extraction sites. After tooth removal, the socket was subjected to one of four treatment modalities: placement of a deproteinized bovine bone mineral (DBBM; Endobon) covered with a soft tissue punch from the palate (Tx1); placement of DBBM without soft tissue punch (Tx2); placement of an adsorbable collagen membrane (Osseoguard) covering the DBBM (Tx3); and no additional treatment (control)...
May 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28402349/partial-extraction-therapies-pet-part-2-procedures-and-technical-aspects
#9
Howard Gluckman, Maurice Salama, Jonathan Du Toit
Part 1 of this series introduced the partial extraction therapies as a group of techniques for ridge preservation at immediate implant placement and beneath pontic sites. The concept proposes a paradigm shift away from extract and augment toward partly retaining the tooth root to preserve the ridge and prevent buccopalatal collapse. The revolutionary socket-shield technique was introduced in 2010; however, there has been no follow-up literature to guide the clinician in terms of procedural steps. While root submergence is well established, the socket-shield and pontic shield are still in their clinical infancy and require long-term clinical data before they can be proposed as routine in everyday implant dentistry...
May 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28398151/assessing-bone-type-of-implant-recipient-sites-by-stereomicroscopic-observation-of-bone-core-specimens-a-comparison-with-the-assessment-using-dental-radiography
#10
Min-Wen Fu, E-Chin Shen, Earl Fu, Fu-Gong Lin, Tian-You Wang, Hsien-Chung Chiu
BACKGROUND: We aimed to determine if bone quality evaluation of surgically obtained bone core specimens using a stereomicroscope is reliable for determining bone quality at implant recipient sites. METHODS: Bone quality was pre-surgically assessed in 122 edentulous ridges obtained from 62 patients using periapical radiographs and categorized according to the Lekholm and Zarb classification. During surgery, bone specimens were trephined, and bone types were immediately classified using a stereomicroscope...
March 10, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28370361/randomized-clinical-trial-of-ridge-preservation-using-porcine-bone-cross-linked-collagen-vs-bovine-bone-non-cross-linked-collagen-cone-beam-computed-tomographic-analysis
#11
Hyun-Chang Lim, Ui-Won Jung, Hoon You, Jung-Seok Lee
PURPOSE: The aim of this study was to radiographically compare horizontal and vertical alterations of the alveolar ridge after ridge preservation using different combinations of biomaterials. MATERIALS AND METHODS: The patients were randomly assigned into two groups: (a) the test group, which received collagenated porcine bone plus cross-linked collagen membrane (n = 15), and (b) the control group, which received collagenated bovine bone plus non-cross-linked collagen membrane (n = 15)...
March 28, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28361377/alveolar-ridge-preservation-with-autologous-particulated-dentin-a-case-series
#12
Silvio Valdec, Pavla Pasic, Alex Soltermann, Daniel Thoma, Bernd Stadlinger, Martin Rücker
INTRODUCTION: Ridge preservation can be performed with autologous bone, alloplastic bone substitute material or a combination of both. Dentin is similar to bone in its chemical composition. In its use as bone substitute material, it undergoes a remodelling process and transforms to bone. The presented case report introduces a technique in which the extraction socket is augmented with autologous, particulated dentin. MATERIAL AND METHODS: The fractured, non-savable mesial incisor of the upper jaw was carefully extracted in axial direction...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28357003/alveolar-ridge-preservation-after-tooth-extraction-with-dfdba-and-platelet-concentrates-a-radiographic-retrospective-study
#13
Behrang Baniasadi, Laurence Evrard
OBJECTIVES: The purpose of this study was to evaluate vertical alveolar bone loss 3 months after tooth extraction when a technique of ridge preservation was applied using a particulate demineralized freeze-dried bone allograft 300 - 500 µm associated with platelet concentrates (platelet-rich-fibrin) in the form of gel and membranes. MATERIAL AND METHODS: A retrospective radiological clinical study was conducted on 56 patients for whom 95 extractions had been performed immediately followed by alveolar filling...
2017: Open Dentistry Journal
https://www.readbyqxmd.com/read/28356687/evaluation-of-two-socket-healing-procedures-with-and-without-mesenchymal-stem-cells-a-comparative-study
#14
Abhinav Jain, Mahinder Singh, K P Ganapathy, Vikas Ramola, Deepak Passi, Komal Jain
AIMS AND OBJECTIVES: Successful preservation of the edentulous ridge after extraction may eliminate or reduce the need for ridge augmentation procedures. It is proved that grafting of fresh extraction sockets with bone grafts promotes ridge preservation. An objective method of maintaining height and width of alveolar ridge using mesenchymal stem cells (MSCs) seeded on collagen membrane was implemented in this study. METHODOLOGY: Ten bilaterally symmetrical extraction sockets scheduled for extraction were selected for this study...
July 2016: National Journal of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28343980/nerve-damage-from-bone-allografts-and-xenografts-a-case-series
#15
M Anthony Pogrel
The concept of socket preservation by placing a particulate bone allograft or xenograft into a tooth socket or on the alveolar ridge after tooth removal remains a somewhat controversial topic. The concept is that it will preserve the ridge from resorption and such that subsequent implant insertion will be easier, with fewer complications. However, one particular issue is that these materials, although not directly neurotoxic, appear to be an irritant to the nerves if they come in contact with them. We present a case series demonstrating this complication...
February 27, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28327586/cellular-preservation-of-musculoskeletal-specializations-in-the-cretaceous-bird-confuciusornis
#16
Baoyu Jiang, Tao Zhao, Sophie Regnault, Nicholas P Edwards, Simon C Kohn, Zhiheng Li, Roy A Wogelius, Michael J Benton, John R Hutchinson
The hindlimb of theropod dinosaurs changed appreciably in the lineage leading to extant birds, becoming more 'crouched' in association with changes to body shape and gait dynamics. This postural evolution included anatomical changes of the foot and ankle, altering the moment arms and control of the muscles that manipulated the tarsometatarsus and digits, but the timing of these changes is unknown. Here, we report cellular-level preservation of tendon- and cartilage-like tissues from the lower hindlimb of Early Cretaceous Confuciusornis...
March 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28327417/appositional-bone-graft-tunneled-technical-note
#17
Roberto Almeida de Azevedo, Felipe Seoane Matos, Leonardo Morais Godoy Figueiredo
INTRODUCTION: A satisfactory positioning of the dental implants is very important in the cosmetic and functional outcome in this treatment for edentulous. Insertion of an endosseous implant in the correct positioning requires sufficient bone volume. Therefore, bone-grafting procedures are becoming increasingly common, especially for the augmentation of horizontally deficient ridges. PRESENTATION OF CASE: Many patients have been treated with this technique of appositional Bone Graft Tunneled at our clinic since 2005...
2017: International Journal of Surgery Case Reports
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
#18
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
#19
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
#20
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
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