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https://www.readbyqxmd.com/read/28806378/gummy-smile-correction-using-lingual-orthodontics-and-augmented-corticotomy-in-extremely-thin-alveolar-housing
#1
Kyung-Yen Nahm, Seung-Yun Shin, Hyo-Won Ahn, Seong-Hun Kim, Gerald Nelson
BACKGROUND: Tooth movement out of anatomic limitations was assisted by augmented corticotomy using deproteinized bovine bone mineral. METHODS: Lip protrusion can be reduced by premolar extraction followed by retraction of the anterior teeth. Surgical intervention is appropriate when the alveolar bone housing of the anterior region is insufficient for the tooth movement. In this patient, corticotomy in upper palatal area and anterior segmented osteotomy in the mandible were performed...
August 10, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28803806/the-use-of-computer-assisted-corticotomy-to-enhance-surgical-procedures
#2
Marco Finotti, Antonio Gracco, Mariarosa Del Torre, Laura Siviero, Alberto de Stefani, Giovanni Bruno
In recent years, several surgical techniques have been proposed with the main goal of reducing the length of orthodontic treatment. Some of these techniques use a piezoelectric surgical instrument to perform alveolar bone cuts and promote localized bone turnover. One of the main limitations of these surgical techniques is that corticotomies may damage dental roots since traditional radiographic examinations do not allow the surgeon to precisely determine the length and three-dimensional position of the roots...
August 10, 2017: International Orthodontics
https://www.readbyqxmd.com/read/28803739/two-stage-reconstruction-of-the-severely-deficient-alveolar-ridge-bone-graft-followed-by-alveolar-distraction-osteogenesis
#3
A Rachmiel, O Emodi, D Aizenbud, D Rachmiel, D Shilo
Distraction osteogenesis for the augmentation of severe alveolar bone deficiency has gained popularity during the past two decades. In cases where the vertical bone height is not sufficient to create a stable transport segment, performing alveolar distraction osteogenesis (ADO) is not possible. In these severe cases, a two-stage treatment protocol is suggested: onlay bone grafting followed by ADO. An iliac crest onlay bone graft followed by ADO was performed in 13 patients: seven in the mandible and six in the maxilla...
August 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28802762/clinical-application-of-autogenous-partially-demineralized-dentin-matrix-prepared-immediately-after-extraction-for-alveolar-bone-regeneration-in-implant-dentistry-a-pilot-study
#4
T Minamizato, T Koga, Takashi I, Y Nakatani, M Umebayashi, Y Sumita, T Ikeda, I Asahina
The aim of this study was to examine the efficacy and safety of autogenous partially demineralized dentin matrix (APDDM) prepared onsite, for clinical application in bone regeneration procedures related to implant dentistry, including socket preservation, alveolar ridge augmentation, and maxillary sinus floor augmentation. In this study, 16 patients underwent dental implant placement using APDDM transplantation. There were no systemic or local complications (including surgical site infection) in any of the cases, and oral rehabilitation using dental implants was successful in all cases for at least 2 years after attachment of the suprastructure...
August 9, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28800160/exercise-attenuates-alveolar-bone-loss-and-anxiety-like-behaviour-in-rats-with-periodontitis
#5
Eric F Andrade, Débora R Orlando, Júlia A S Gomes, Renata de C Foureaux, Rafael C Costa, Mary S Varaschin, Gustavo P Rogatto, Rodrigo F de Moura, Luciano J Pereira
AIM: To evaluate the effects of physical training on inflammatory and behavioral parameters of Wistar rats with periodontal disease (PD). MATERIALS AND METHODS: Twenty four animals were distributed in a 2x2 factorial design (with and without exercise, with and without PD). Trained animals swimmed one hour daily during eight weeks. PD was induced by ligature 14 days before the end of experiment and in the last week all animals were submitted to the Marble Burying Test...
August 11, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28800144/at-least-three-phenotypes-exist-among-periodontitis-patients
#6
Chryssa Delatola, Bruno G Loos, Evgeni Levin, Marja L Laine
AIM: To identify phenotypes of periodontitis patients by the use of an unsupervised modeling technique (clustering), based on pre-treatment radiographic and microbiological characteristics. MATERIALS AND METHODS: This retrospective study included data from 392 untreated periodontitis patients. Co-regularized spectral clustering algorithm was used to cluster the patients. The resulting clusters were subsequently characterized based on their demographics, radiographic bone loss patterns and microbial data...
August 11, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28791080/three-dimensional-printing-model-as-a-tool-to-assist-in-surgery-for-large-mandibular-tumour-a-case-report
#7
Kazuyuki Yusa, Hideyuki Yamanochi, Akira Takagi, Mitsuyoshi Iino
OBJECTIVES: Recently, three-dimensional printing models based on preoperative computed tomography and magnetic resonance imaging images have been widely used in medical fields. This study presents an effective use of the three-dimensional printing model in exploring complex spatial relationship between the tumour and surrounding tissue and in simulation surgery based planning of the operative procedure. MATERIAL AND METHODS: The patient was a 7-year-old boy with ameloblastic fibro-odontoma...
April 2017: Journal of Oral & Maxillofacial Research
https://www.readbyqxmd.com/read/28774851/a-prospective-study-of-chin-bone-graft-harvesting-for-unilateral-maxillary-alveolar-cleft-during-mixed-dentition
#8
AliReza Shirzadeh, Amin Rahpeyma, Saeedeh Khajehahmadi
PURPOSE: The chin is a common donor site for alveolar cleft bone grafting. The amount of bone available at this site can be limited, because conservative harvesting with mixed dentition must consider the incisive nerve, the unerupted mandibular canine, and the integrity of the inferior mandibular border. MATERIALS AND METHODS: Patients with nonsyndromic unilateral alveolar cleft in the mixed dentition stage were selected for this study. The volume of bone obtained from the mandibular symphysis (symphysis menti), degree of alteration in lower lip sensation, anterior tooth vitality, remaining bone in the alveolar cleft, and bone defects at the donor site 1 year after surgery were evaluated...
July 10, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28774432/automatic-methods-for-alveolar-bone-loss-degree-measurement-in-periodontitis-periapical-radiographs
#9
P L Lin, P Y Huang, P W Huang
BACKGROUND AND OBJECTIVE: Periodontitis involves progressive loss of alveolar bone around the teeth. Hence, automatic alveolar bone loss measurement in periapical radiographs can assist dentists in diagnosing such disease. In this paper, we propose an automatic length-based alveolar bone loss measurement system with emphasis on a cementoenamel junction (CEJ) localization method: CEJ_LG. METHOD: The bone loss measurement system first adopts the methods TSLS and ABLifBm, which we presented previously, to extract teeth contours and bone loss areas from periodontitis radiograph images...
September 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28774336/damping-ratio-analysis-of-tooth-stability-under-various-simulated-degrees-of-vertical-alveolar-bone-loss-and-different-root-types
#10
Kuo-Ning Ho, Sheng-Yang Lee, Haw-Ming Huang
BACKGROUND: The purpose of this study was to evaluate the feasibility of using damping ratio (DR) analysis combined with resonance frequency (RF) and periotest (PTV) analyses to provide additional information about natural tooth stability under various simulated degrees of alveolar vertical bone loss and various root types. METHODS: Three experimental tooth models, including upper central incisor, upper first premolar, and upper first molar were fabricated using Ti6Al4V alloy...
August 3, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28774071/in-vitro-and-in-vivo-study-of-a-novel-porcine-collagen-membrane-for-guided-bone-regeneration
#11
Eisner Salamanca, Chi-Yang Tsai, Yu-Hwa Pan, Yu-Te Lin, Haw-Ming Huang, Nai-Chia Teng, Che-Tong Lin, Sheng-Wei Feng, Wei-Jen Chang
For years, in order to improve bone regeneration and prevent the need of a second stage surgery to remove non-resorbable membranes, biological absorbable membranes have gradually been developed and applied in guided tissue regeneration (GTR). The present study's main objective was to achieve space maintenance and bone regeneration using a new freeze-dried developed porcine collagen membrane, and compare it with an already commercial collagen membrane, when both were used with a bovine xenograft in prepared alveolar ridge bone defects...
November 22, 2016: Materials
https://www.readbyqxmd.com/read/28770164/use-of-elevator-instruments-when-luxating-and-extracting-teeth-in-dentistry-clinical-techniques
#12
John Mamoun
In dentistry, elevator instruments are used to luxate teeth, and this technique imparts forces to tooth particles that sever the periodontal ligament around tooth roots inside the socket and expand alveolar bone around tooth particles. These effects can result in extraction of the tooth particles or facilitate systematic forceps extraction of the tooth particles. This article presents basic oral surgery techniques for applying elevators to luxate teeth. Determination of the optimal luxation technique requires understanding of the functions of the straight elevator and the Cryer elevator, the concept of purchase points, how the design elements of elevator working ends and tips influence the functionality of an elevator, application of forces to tooth particles, sectioning teeth at furcations, and bone removal to facilitate luxation...
June 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/28765216/key-role-of-the-scavenger-receptor-marco-in-mediating-adenovirus-infection-and-subsequent-innate-responses-of-macrophages
#13
Mareike D Maler, Peter J Nielsen, Nicole Stichling, Idan Cohen, Zsolt Ruzsics, Connor Wood, Peggy Engelhard, Maarit Suomalainen, Ildiko Gyory, Michael Huber, Joachim Müller-Quernheim, Wolfgang W A Schamel, Siamon Gordon, Thilo Jakob, Stefan F Martin, Willi Jahnen-Dechent, Urs F Greber, Marina A Freudenberg, György Fejer
The scavenger receptor MARCO is expressed in several subsets of naive tissue-resident macrophages and has been shown to participate in the recognition of various bacterial pathogens. However, the role of MARCO in antiviral defense is largely unexplored. Here, we investigated whether MARCO might be involved in the innate sensing of infection with adenovirus and recombinant adenoviral vectors by macrophages, which elicit vigorous immune responses in vivo Using cells derived from mice, we show that adenovirus infection is significantly more efficient in MARCO-positive alveolar macrophages (AMs) and in AM-like primary macrophage lines (Max Planck Institute cells) than in MARCO-negative bone marrow-derived macrophages...
August 1, 2017: MBio
https://www.readbyqxmd.com/read/28765038/synergistic-effect-of-1%C3%AE-25-dihydroxyvitamin-d3-and-17%C3%AE-estradiol-on-osteoblast-differentiation-of-pediatric-mscs
#14
Jing Li, Bonnie L Padwa, Shuanhu Zhou, Julia Mullokandova, Meryl S LeBoff, Julie Glowacki
Vitamin D is essential for mineral homeostasis and contributes to bone metabolism by stimulating osteoblast differentiation of marrow stromal cells (MSCs). In this study, we used MSCs from pre-pubertal girls and boys to test the hypothesis that 1α,25(OH)2D and 17β-estradiol have synergistic effects on these MSCs, and what mechanism is involved. With IRB approval, we isolated MSCs from discarded excess iliac marrow graft from children undergoing alveolar cleft repair. Plasma was available from 8 female (9...
July 29, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28764948/effects-of-the-incorporation-of-%C3%AE%C2%B5-aminocaproic-acid-chitosan-particles-to-fibrin-on-cementoblast-differentiation-and-cementum-regeneration
#15
Chan Ho Park, Joung-Hwan Oh, Hong-Moon Jung, Yoonnyoung Choi, Saeed Rahman, Sungtae Kim, Tae-Il Kim, Hong-In Shin, Yun-Sil Lee, Frank H Yu, Jeong-Hwa Baek, Hyun-Mo Ryoo, Kyung Mi Woo
Cementum formation on the exposed tooth-root surface is a critical process in periodontal regeneration. Although various therapeutic approaches have been developed, regeneration of integrated and functional periodontal complexes is still wanting. Here, we found that the OCCM30 cementoblasts cultured on fibrin matrix express substantial levels of matrix proteinases, leading to the degradation of fibrin and the apoptosis of OCCM30 cells, which was reversed upon treatment with a proteinase inhibitor, ε-aminocaproic acid (ACA)...
July 29, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28762152/quantitative-analysis-of-the-relationship-between-maxillary-incisors-and-the-incisive-canal-by-cone-beam-computed-tomography-in-an-adult-japanese-population
#16
Tomonari Matsumura, Yuji Ishida, Ayako Kawabe, Takashi Ono
BACKGROUND: In setting goals for orthodontic treatment, determining the morphologies of the alveolar bone and maxillary incisor root is important for avoiding root resorption, dehiscence, and fenestration. This study aimed to analyze the configurational relationships among maxillary incisors, the alveolar border, and the incisive canal by cone-beam computed tomography (CBCT). METHODS: Cone-beam CT images of 93 orthodontic patients were evaluated for length of the incisive canal (L); angles between the palatal plane and the maxillary alveolar border (θ1), the incisive canal (θ2), and maxillary incisor (θ3); distance from the left maxillary incisor to the incisive canal (D); and cross-sectional areas of the incisive canal (CSAs) at three vertical levels...
December 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/28760880/estrogen-signaling-contributes-to-sex-differences-in-macrophage-polarization-during-asthma
#17
Aleksander Keselman, Xi Fang, Preston B White, Nicola M Heller
Allergic asthma is a chronic Th2 inflammation in the lungs that constricts the airways and presents as coughing and wheezing. Asthma mostly affects boys in childhood and women in adulthood, suggesting that shifts in sex hormones alter the course of the disease. Alveolar macrophages have emerged as major mediators of allergic lung inflammation in animal models as well as humans. Whether sex differences exist in macrophage polarization and the molecular mechanism(s) that drive differential responses are not well understood...
July 31, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28759740/radiological-evaluation-of-maxillary-sinus-anatomy-a-cross-sectional-study-of-300-patients
#18
Naroa Lozano-Carrascal, Oscar Salomó-Coll, Sergio Alexandre Gehrke, José Luis Calvo-Guirado, Federico Hernández-Alfaro, Jordi Gargallo-Albiol
OBJECTIVE: The aim of the present study was to evaluate the principal anatomical characteristics of the maxillary sinus using Cone Beam Computed Tomography (CBCT) in order to facilitate prevention of intra- and post-operative complications. MATERIALS AND METHODS: Three hundred CBCT scans from patients undergoing implant surgery were analysed. The following anatomical structures were evaluated: (1) Residual ridge height (RRH) and width (RRW); (2) Ridge bone density (BD); (3) Maxillary sinus angle (MSA); (4) Maxillary sinus lateral wall thickness (LWT); (5) Schneiderian membrane thickness (MT); (6) Maxillary sinus septa (SS); (7) Posterior superior alveolar artery (PSAA)...
July 29, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28758294/periodontitis-facts-fallacies-and-the-future
#19
REVIEW
Jørgen Slots
This volume of Periodontology 2000 represents the 25th anniversary of the Journal, and uses the occasion to assess important advancements in periodontology over the past quarter-century as well as the hurdles that remain. Periodontitis is defined by pathologic loss of the periodontal ligament and alveolar bone. The disease involves complex dynamic interactions among active herpesviruses, specific bacterial pathogens and destructive immune responses. Periodontal diagnostics is currently based on clinical rather than etiologic criteria, and provides limited therapeutic guidance...
October 2017: Periodontology 2000
https://www.readbyqxmd.com/read/28757932/genetic-susceptibility-and-periodontal-disease-a-retrospective-study-on-a-large-italian-sample
#20
L Tettamanti, R M Gaudio, A Iapichino, D Mucchi, A Tagliabue
BACKGROUND: Periodontal disease (PD) is a multifactorial illness in which environment and host interact. The genetic component plays a key role in the onset of PD. In fact the genetic compound can modulate the inflammation of the mucous membranes and the loss of alveolar bone. The genetics of PD is not well understood. Previous studies suggest a strong association between PD occurrence and individual genetic profile. The role of genetic susceptibility could impact on the clinical manifestations of PD, and consequently on prevention and therapy...
January 2017: Oral & Implantology
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