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Alveolar regeneration

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https://www.readbyqxmd.com/read/27908574/reconstruction-of-a-post-traumatic-maxillary-ridge-using-a-radial-forearm-free-flap-and-immediate-tissue-engineering-bone-morphogenetic-protein-bone-marrow-aspirate-concentrate-and-cortical-cancellous-bone-case-report
#1
James C Melville, Ramzey Tursun, J Marshall Green, Robert E Marx
The purpose of this article is to describe reconstruction of the maxillary alveolar ridge by use of a microvascular free flap combined with an immediate tissue-engineered bone graft. This novel surgical technique involved the use of a radial forearm free flap and immediate allogeneic avascular bone graft augmented with bone morphogenetic protein and bone marrow aspirate concentrate. A poly-d,l-lactic acid mesh was used a containment unit for the bone graft. The patient was successfully treated with a viable radial forearm free flap for soft tissue and regeneration of bone with adequate height and width, which allowed the placement of 3 dental implants with excellent arch coordination...
November 9, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27893553/healing-effects-of-platelet-rich-plasma-on-peripheral-nerve-injuries
#2
Farshid Bastami, Peyman Vares, Arash Khojasteh
Regeneration of peripheral nerve injuries (PNIs) has been a major challenging issue in regenerative medicine and tissue engineering. Inferior alveolar nerve and lingual nerve injuries are the major difficulties and complications of oral surgeries following dental implant placement, etc. The aim of this study was to systematically review the effects of platelet-rich plasma (PRP) on the regeneration of PNIs. Medline NCBI databases were searched for related articles up to and including May 2016. Being published in English papers, use of PRP in peripheral nerve regeneration, in vivo studies, and having histological evaluations was the inclusion criteria...
November 23, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27891638/regenerative-potential-of-leucocyte-and-platelet-rich-fibrin-l-prf-part-b-sinus-floor-elevation-alveolar-ridge-preservation-and-implant-therapy-a-systematic-review
#3
REVIEW
Ana B Castro, Nastaran Meschi, Andy Temmerman, Nelson Pinto, Paul Lambrechts, Wim Teughels, Marc Quirynen
AIM: To analyse the effect of Leucocyte- and Platelet Rich Fibrin (L-PRF) on bone regeneration procedures and osseointegration. MATERIALS AND METHODS: An electronic and hand search was conducted in three databases (MEDLINE, EMBASE and Cochrane). Only randomised clinical trials, written in English where L-PRF was applied in bone regeneration and implant procedures, were selected. No follow-up restrictions were applied. RESULTS: A total of 14 articles were included and processed...
November 28, 2016: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/27865631/the-influence-of-cortical-bone-perforation-on-guided-bone-regeneration-in-humans
#4
S A Danesh-Sani, D Tarnow, J K Yip, R Mojaver
The purpose of this study was to evaluate the effect of cortical bone perforation on angiogenesis and osteogenesis of the augmented ridge in guided bone regeneration. Eighteen patients who had osseous defects in the mandible were selected. In the test group (n=9), alveolar cortical bone in the area of regeneration was perforated. No decortication was performed in the control group (n=9). Subsequently, defects were augmented by guided bone regeneration using resorbable membrane and bovine bone. After a healing period of 7 months, trephine cores were harvested for histological and histomorphometric analysis of the grafted areas...
November 16, 2016: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27861515/involvement-of-igf1r-in-bronchiolar-epithelial-regeneration-role-during-repair-kinetics-after-selective-club-cell-ablation
#5
Icíar P López, Sergio Piñeiro-Hermida, Rosete S Pais, Raquel Torrens, Andreas Hoeflich, José G Pichel
Regeneration of lung epithelium is vital for maintaining airway function and integrity. An imbalance between epithelial damage and repair is at the basis of numerous chronic lung diseases such as asthma, COPD, pulmonary fibrosis and lung cancer. IGF (Insulin-like Growth Factors) signaling has been associated with most of these respiratory pathologies, although their mechanisms of action in this tissue remain poorly understood. Expression profiles analyses of IGF system genes performed in mouse lung support their functional implication in pulmonary ontogeny...
2016: PloS One
https://www.readbyqxmd.com/read/27857817/conservative-socket-regeneration-with-buccal-wall-defect-using-guided-tissue
#6
Mohammed Jasim Al-Juboori
Progressive alveolar bone resorption after tooth extraction may lead to surgical and prosthetic-driven difficulties, especially when deciding to use a dental implant to replace the extracted tooth. This case report discusses an irreparable lower left second premolar tooth with a periodontal lesion on the buccal side. A preservative tooth extraction was performed. Then, the socket was grafted with bovine bone, a collagen membrane was placed between the buccal bone and the attached gingiva, covering the bone dehiscence buccally, and the socket without a flap was raised...
2016: Open Dentistry Journal
https://www.readbyqxmd.com/read/27847815/comparison-of-bone-resorption-rates-after-intraoral-block-bone-and-guided-bone-regeneration-augmentation-for-the-reconstruction-of-horizontally-deficient-maxillary-alveolar-ridges
#7
B Alper Gultekin, Elcin Bedeloglu, T Emre Kose, Eitan Mijiritsky
Purpose. Bone atrophy after tooth loss may leave insufficient bone for implant placement. We compared volumetric changes after autogenous ramus block bone grafting (RBG) or guided bone regeneration (GBR) in horizontally deficient maxilla before implant placement. Materials and Methods. In this retrospective study, volumetric changes at RBG or GBR graft sites were evaluated using cone-beam computed tomography. The primary outcome variable was the volumetric resorption rate. Secondary outcomes were bone gain, graft success, and implant insertion torque...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27843709/a-computational-model-of-cellular-engraftment-on-lung-scaffolds
#8
Joshua J Pothen, Vignesh Rajendran, Darcy Wagner, Daniel J Weiss, Bradford J Smith, Baoshun Ma, Jason H T Bates
The possibility that stem cells might be used to regenerate tissue is now being investigated for a variety of organs, but these investigations are still essentially exploratory and have few predictive tools available to guide experimentation. We propose, in this study, that the field of lung tissue regeneration might be better served by predictive tools that treat stem cells as agents that obey certain rules of behavior governed by both their phenotype and their environment. Sufficient knowledge of these rules of behavior would then, in principle, allow lung tissue development to be simulated computationally...
2016: BioResearch Open Access
https://www.readbyqxmd.com/read/27836901/deformation-induced-transitional-myofibroblasts-remodel-the-lung-during-compensatory-growth
#9
Robert D Bennett, Alexandra B Ysasi, Willi L Wagner, Cristian D Valenzuela, Akira Tsuda, Saumyadipta Pyne, Shuqiang Li, Jonna Grimsby, Prapti Pokharel, Kenneth J Livak, Maximilian Ackermann, Paul Blainey, Steven J Mentzer
In many mammals, including humans, removal of one lung (pneumonectomy) results in the compensatory growth of the remaining lung. Compensatory growth involves not only an increase in lung size, but also an increase in the number of alveoli in the peripheral lung; however, the process of compensatory neoalveolarization remains poorly understood. Here, we show that the expression of α-smooth muscle actin (SMA)-a cytoplasmic protein characteristic of myofibroblasts-is induced in the pleura following pneumonectomy...
November 11, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27833709/immediate-reconstruction-of-large-full-thickness-segmental-anterior-maxillary-defect-with-bone-transport
#10
Alberto Rocha Pereira, Nuno Montezuma, Luis Oliveira, Miguel Magalhães, José Rosa
Maxillary segmental defects are a reconstructive challenge particularly when the anterior arch is involved. Missing bone, mucosa, and teeth should be replaced; fistulae closure should be guaranteed by bone and mucosa continuity; stable functional occlusion should be achieved; and facial aesthetics restored. These defects resulting from tumor excisions, if left untreated, will cause additional problems related to interposed scar and collapse of lip and nose. Immediate reconstruction should avoid these problems and should be considered when safe tumor-free margins are obtained...
November 2016: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/27824330/effect-of-sustained-pdgf-non-viral-gene-delivery-on-repair-of-tooth-supporting-bone-defects
#11
A B Plonka, B Khorsand, N Yu, J V Sugai, A K Salem, W V Giannobile, S Elangovan
Recombinant human platelet-derived growth factor-BB (rhPDGF-BB) promotes soft tissue and bone healing, and is FDA-approved for treatment of diabetic ulcers and periodontal defects. The short half-life of topical rhPDGF-BB protein application necessitates bolus, high-dose delivery. Gene therapy enables sustained local growth factor production. A novel gene activated matrix delivering polyplexes of polyethylenimine (PEI)-plasmid DNA (pDNA) encoding PDGF was evaluated for promotion of periodontal wound repair in vivo...
November 8, 2016: Gene Therapy
https://www.readbyqxmd.com/read/27800213/the-influence-of-root-surface-distance-to-alveolar-bone-and-periodontal-ligament-on-periodontal-wound-healing
#12
Marco Montevecchi, Annapaola Parrilli, Milena Fini, Maria Rosaria Gatto, Aurelio Muttini, Luigi Checchi
PURPOSE: The purpose of this animal study was to perform a 3-dimensional micro-computed tomography (micro-CT) analysis in order to investigate the influence of root surface distance to the alveolar bone and the periodontal ligament on periodontal wound healing after a guided tissue regeneration (GTR) procedure. METHODS: Three adult Sus scrofa domesticus specimens were used. The study sample included 6 teeth, corresponding to 2 third mandibular incisors from each animal...
October 2016: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/27796199/establishing-proximal-and-distal-regional-identities-in-murine-and-human-tissue-engineered-lung-and-trachea
#13
Andrew Trecartin, Soula Danopoulos, Ryan Spurrier, Hanaa Knaneh-Monem, Michael Hiatt, Barbara Driscoll, Christian Hochstim, Denise Al-Alam, Tracy C Grikscheit
The cellular and molecular mechanisms that underpin regeneration of the human lung are unknown, and the study of lung repair has been impeded by the necessity for reductionist models that may exclude key components. We hypothesized that multicellular epithelial and mesenchymal cell clusters or lung organoid units (LuOU) could be transplanted to recapitulate proximal and distal cellular structures of the native lung and airways. Transplantation of LuOU resulted in the growth of tissue-engineered lung (TELu) that contained the necessary cell types consistent with native adult lung tissue and demonstrated proliferative cells at 2 and 4 weeks...
November 2016: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/27795860/sinus-augmentation-by-platelet-rich-fibrin-alone-a-report-of-two-cases-with-histological-examinations
#14
Naofumi Aoki, Takeo Kanayama, Michinori Maeda, Koichiro Horii, Hironori Miyamoto, Keinoshin Wada, Yasutaka Ojima, Tsukasa Tsuchimochi, Yasuyuki Shibuya
In sinus floor augmentation of an atrophic posterior maxilla, platelet-rich fibrin (PRF) has been used as a graft material. We herein report two cases with histological evaluations of PRF after the surgery. The first case was a 28-year-old female with an atrophic right posterior maxilla who was treated with sinus floor augmentation and simultaneous implant placement using PRF as the sole graft material in our hospital. Twenty-four months after surgery, the implant was unfortunately removed because of occlusal overloading by parafunctional habits...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27792803/peripheral-brain-derived-neurotrophic-factor-modulates-regeneration-following-inferior-alveolar-nerve-injury-in-rats
#15
Hiroyuki Yoshikawa, Yurie Yamada, Masayuki Kurose, Kensuke Yamamura, Takeyasu Maeda, Kenji Seo
AIMS: To examine the effects of local brain-derived neurotrophic factor (BDNF) produced after nerve injury on the functional regeneration of the damaged nerve. METHODS: The inferior alveolar nerve was transected in adult male rats and 1 μg or 10 μg of BDNF antibody was administered at the injury site; a third group of rats received saline and a fourth group underwent nerve ligation. BDNF mRNA was quantified in the transected tissue and trigeminal ganglion by using real-time polymerase chain reaction (PCR)...
October 2016: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/27788570/regeneration-of-bovine-mammary-gland-in-immunodeficient-mice-by-transplantation-of-bovine-mammary-epithelial-cells-mixed-with-matrigel
#16
Hyun Jung Park, Won Young Lee, Ha Yeon Jeong, Hyuk Song
Background and Objectives: With the global demand for dairy protein for consumption growing annually, there has been increasing activity in the research field of dairy protein synthesis and production. From a manipulation perspective, it is more difficult to use live cattle for laboratory studies on the production of milk as well as of dairy protein such as casein, as compared with using laboratory animals like rodents. Therefore, we aimed to develop a mouse model of bovine mammary alveolar ducts for laboratory-scale studies...
November 30, 2016: International Journal of Stem Cells
https://www.readbyqxmd.com/read/27787807/in-vitro-comparison-of-the-efficacy-of-tgf-%C3%AE-1-and-pdgf-bb-in-combination-with-freeze-dried-bone-allografts-for-induction-of-osteogenic-differentiation-in-mg-63-osteoblast-like-cells
#17
Surena Vahabi, Maryam Torshabi, Azadeh Esmaeil Nejad
Predictable regeneration of alveolar bone defects has always been a challenge in implant dentistry. Bone allografts are widely used bone substitutes with controversial osteoinductive activity. This in vitro study aimed to assess the osteogenic potential of some commercially available freeze-dried bone allografts supplemented with human recombinant platelet-derived growth factor-BB and transforming growth factor beta-1. Cell viability, mineralization, and osteogenic gene expression of MG-63 osteoblast-like cells were compared among the allograft alone, allograft/platelet-derived growth factor-BB, allograft/transforming growth factor beta-1, and allograft/platelet-derived growth factor-BB/transforming growth factor beta-1 groups...
December 2016: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27783845/cementogenesis-and-osteogenesis-in-periodontal-tissue-regeneration-by-recombinant-human-transforming-growth-factor-%C3%AE-3-a-pilot-study-in-papio-ursinus
#18
Ugo Ripamonti, Ruqayya Parak, Roland M Klar, Caroline Dickens, Therese Dix-Peek, Raquel Duarte
OBJECTIVES: The aim of this study was to investigate cementogenesis and alveolar bone induction during in vivo periodontal tissue regeneration upon implantation of hTGF-β3 in furcation defects of Papio ursinus and to evaluate the feasibility of gene expression studies. MATERIALS AND METHODS: Class II furcation defects (day 0) were prepared in mandibular first and second molars of three P. ursinus and on day 30 implanted with and without 75 μg hTGF-β3 in Matrigel(®) matrix...
October 26, 2016: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/27780611/experimental-model-of-osteonecrosis-of-the-jaw-in-rats-treated-with-zoledronic-acid
#19
M E Kolpakova, A A Zubarevа, T D Artamonova, E K Lisovskaya, S G Chefu, O D Yagmurov, A I Yaremenko, T D Vlasov
We have examined the development of medication-related osteonecrosis of the jaws (MRONJ) in rats with no previous accumulation of zoledronic acid in the mandible. Ten male Wistar rats (weight 350-400g) were anaesthetised with chloral hydrate 450mg/kg intraperitoneally and the first and second mandibular molars on the left side were extracted. The five experimental rats were given six injections of zoledronic acid 0.18mg/kg over the next four weeks (total dose 1.08mg/kg). Two injections were given at once as an intravenous bolus injection (0...
October 22, 2016: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/27757220/clinical-safety-and-efficacy-of-implantation-of-octacalcium-phosphate-collagen-composites-in-tooth-extraction-sockets-and-cyst-holes
#20
Tadashi Kawai, Yuji Tanuma, Keiko Matsui, Osamu Suzuki, Tetsu Takahashi, Shinji Kamakura
It was demonstrated that octacalcium phosphate collagen composite achieved notable bone regeneration in bone defects in preclinical studies. On the basis of the research results, an investigator-initiated exploratory clinical trial was conducted after approval from a local Institutional Review Board. This clinical study was performed as a single-arm non-randomized intervention study. Octacalcium phosphate collagen composite was implanted into a total of 10 cases of alveolar bone defects after tooth extractions and cystectomy...
January 2016: Journal of Tissue Engineering
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