Search results for "Ceramic"

showing 10 items of 2129 documents

Tracheal Ceramic Rings for Tracheomalacia: A Review After 17 Years

2007

Background: Despite different support techniques, the surgical management of tracheomalacia is still a challenging problem. Satisfactory results after internal stenting are above 80%, whereas, when performing external stenting using biocompatible ceramic rings, results are reported at over 90%. Objective: The purpose of this study was to examine the efficiency of surgical treatment in patients with segmentary tracheomalacia using external ceramic ring grafts. Methods: In this retrospective study, we collected data from 12 patients who underwent surgery during the last 17 years for symptomatic segmentary tracheomalacia by use of biocompatible aluminum-oxide ceramic rings. All except one pati…

AdultMaleCeramicsmedicine.medical_specialtyAdolescentFistulamedicine.medical_treatmentBiocompatible MaterialsAirway resistanceTracheotomymedicineHumansIntubationAgedRetrospective StudiesTracheal Diseasesbusiness.industryStentGranulation tissueMiddle Agedmedicine.diseaseSurgerymedicine.anatomical_structureOtorhinolaryngologyTracheomalaciaSpirometryFemaleStentsTracheotomyForeign bodybusinessThe Laryngoscope
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Tracheomalacia Repair Using Ceramic Rings

1992

Tracheomalacia resulting from tracheostomy or compressive thyroid disease often represents a difficult problem in airway management. In an attempt to improve this condition, biocompatible ceramic rings were surgically implanted in 16 patients to restore normal patency of the airway by first expanding the tracheal lumen lateral, and then in an anterior dimension. Preoperatively, patients displayed moderate to severe obstruction with marked restrictions in lifestyle, as confirmed by history, physical examination, and airway resistance studies. Additionally, three of these patients were trach-dependent at the time of implantation. Postoperatively all 16 patients have normal airway resistance p…

AdultMaleCeramicsmedicine.medical_specialtymedicine.medical_treatmentPhysical examinationAnastomosis03 medical and health sciencesTracheostomy0302 clinical medicineAirway resistancemedicineHumans030223 otorhinolaryngologyTracheal Diseasesmedicine.diagnostic_testbusiness.industryThyroid diseaseProstheses and ImplantsPerioperativeMiddle Agedmedicine.diseaseSurgeryOtorhinolaryngologyTracheomalacia030220 oncology & carcinogenesisFemaleSurgeryAirway managementTracheal StenosisbusinessAirwayCartilage DiseasesFollow-Up StudiesOtolaryngology–Head and Neck Surgery
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Bone Marrow Concentrate and Bovine Bone Mineral for Sinus Floor Augmentation

2011

Purpose: The purpose of this work was to evaluate the potential of substituting autogenous bone (AB) by bone marrow aspirate concentrate (BMAC). Both AB and BMAC were tested in combination with a bovine bone mineral (BBM) for their ability of new bone formation (NBF) in a multicentric, randomized, controlled, clinical and histological noninferiority trial.Materials and Methods: Forty-five severely atrophied maxillary sinus from 26 patients were evaluated in a partial cross-over design. As test arm, 34 sinus of 25 patients were augmented with BBM and BMAC containing mesenchymal stem cells. Eleven control sinus from 11 patients were augmented with a mixture of 70% BBM and 30% AB. Biopsies wer…

AdultMalemedicine.medical_specialtySinus Floor AugmentationOSTEOGENIC DIFFERENTIATIONBone RegenerationMaxillary sinusBiomedical EngineeringSinus Floor AugmentationBioengineeringBiochemistryMAXILLARY SINUSlaw.inventionMESENCHYMAL STEM-CELLSBIO-OSSBiomaterialsRandomized controlled trialTISSUE-ENGINEERED BONEBone MarrowOsteogenesislawmedicineAnimalsHumansSingle-Blind MethodSinus (anatomy)AgedIMPLANT PLACEMENTHYDROXYAPATITE CERAMICSBone TransplantationIntention-to-treat analysisPOROUS HYDROXYAPATITEbusiness.industryIN-VITROMiddle AgedSurgeryAUTOGENOUS BONEImplant placementBovine bonemedicine.anatomical_structureBone SubstitutesCattleFemaleBone marrowbusinessTissue Engineering. Part A
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Effect of self-etching primer/adhesive and conventional bonding on the shear bond strength in metallic and ceramic brackets

2011

Introduction: Bracket debonding from the tooth surface is a common problem in fixed orthodontics. The aims of the present study were to assess the bond strength and failure sites in two ways of bonding technique, with metallic and ceramic brackets. Material and Methods: One hundred premolars were assigned to 4 groups of 25 each: Group A, metallic brackets/ conventional procedure; Group B, metallic brackets/Transbond XT; Group C, ceramic brackets/conventional procedure; and Group D, ceramic brackets/Transbond XT. Transbond XT composite paste was used for bracket bonding and cured by conventional light-cure device. Specimens were subjected to thermocycling. One week after bonding shearing for…

AdultMaterials scienceAdolescentOrthodontic BracketsDentistryDental bondingIn Vitro TechniquesYoung AdultClinical and Experimental DentistryAdhesivesMaterials TestingShear strengthHumansCeramicComposite materialGeneral DentistryShearing (physics)business.industryBond strengthBracketDental BondingTooth surfaceStainless Steel:CIENCIAS MÉDICAS [UNESCO]Resin CementsOtorhinolaryngologyvisual_artUNESCO::CIENCIAS MÉDICASDental Etchingvisual_art.visual_art_mediumSurgeryResearch-ArticleAdhesivebusinessShear Strength
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Efficacy of a bioactive alloplast, in the treatment of human periodontal osseous defects-a clinical study.

2010

Presently, bone replacement grafts are one of the modalities of therapy for which there is histologic evidence of regeneration coronal to the base of the previous osseous defect. Bioactive glasses are used extensively in medicine and dentistry. This study evaluated the additional efficacy of a bioactive alloplast, PerioGlas, in comparison with open flap debridement only. 8 systemically healthy volunteers were chosen, each having 2 collateral sites with ?6 mm clinical probing depth and radiographic evidence of an intrabony defect. Randomly, one defect was treated with open flap debridement plus bioactive glass (test) and the other with open flap debridement alone (control). At baseline, 3, 6…

Adultmedicine.medical_specialtyCeramicsPeriodontal DebridementRadiographymedicine.medical_treatmentDentistryBiocompatible Materialslaw.inventionYoung AdultlawMedicineHumansPeriodontal DebridementGeneral DentistryGingival recessionAgedbusiness.industryOpen flap debridementMiddle Aged:CIENCIAS MÉDICAS [UNESCO]SurgeryResorptionOtorhinolaryngologyBioactive glassDebridement (dental)Coronal planeUNESCO::CIENCIAS MÉDICASBone SubstitutesSurgerymedicine.symptombusinessMedicina oral, patologia oral y cirugia bucal
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Le produzioni medievali di Agrigento alla luce delle recenti indagini nella valle dei Templi

2010

Agrigento medievalefornaci ceramica medievaleanforeceramica comunevalle dei templiSettore L-ANT/08 - Archeologia Cristiana E Medievale
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Profilo dell'attività scientifica di Fabiola Ardizzone

2018

Si ripercorre l'attività scientifica della compianta Collega Fabiola Ardizzone, dai suoi esordi come allieva della Cattedra di Archeologia Cristiana dell'Università di Palermo, all'attività di insegnamento e di ricerca sul campo in qualità di Professore Associato. Il contributo dato da Fabiola Ardizzone agli studi sulla Tarda Antichità e sul Medioevo siciliani hanno riguardato molteplici direttrici di ricerca: dall'identificazione di nuove classi ceramiche alle modalità di organizzazione delle aree funerarie, dai problemi di topografia urbana all'archeologia dei cimiteri e ai problemi della produzione e circolazione delle produzioni ceramiche. The paper traces the scientific activity of Fab…

Agrigento paleocristiana e medievaleimpianti produttiviclassi ceramicheIslamic age in Sicily and in the Medieval Mediterranean.Settore L-ANT/08 - Archeologia Cristiana E Medievalearee funerarieArchaeological excavationdinamiche insediativePottery productionFunerary areaScavo archeologicoetà islamica in Sicilia e nel Mediterraneo.Early Christian and Medieval AgrigentoSettlement dynamic
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I cinque crateri

2015

Il contributo illustra i cinque crateri al Museo Archeologico Regionale ‘A. Salinas’ di Palermo, scoperti ad Agrigento nel 1841, offrendo un quadro di sintesi sui vari aspetti stilistici, iconografici e funzionali di questi preziosi vasi. Ci si sofferma in particolare sulla tipologia del rito funerario, di cui i suddetti crateri-cinerari sono espressione ricostruendo il possibile rapporto tra la loro funzione e le immagine e i miti che li decorano.

Agrigento ceramica attica necropoliSettore L-ANT/07 - Archeologia Classica
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L’ipogeo P e le dinamiche insediative nel settore meridionale della città tra la tarda antichità ed il medioevo

2013

Si inquadra il progetto dell'ipogeo nel contesto delle trasformazioni subite dal settore meridionale della città di Agrigento nella tarda antichità. Si analizza quindi la la nuova funzione svolta dello stesso ipogeo in età medievale.

Agrigento ipogeo P cimitero cristianoofficina ceramica medievale.Settore L-ANT/08 - Archeologia Cristiana E Medievale
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Agrigento. L’ipogeo P nella necropoli paleocristiana della Valle dei Templi. Ricerche 2005-2012

2013

Si presentano i risultati dello scavo e degli studi condotti su l'ipogeo P di Agrigento. Si tratta dell'unico ipogeo paleocristiano interamente indagato e studiato nell'ambito della collaborazione tra Università degli studi di Palermo e Parco archeologico e paesaggistico della Valle dei Templi. L'ipogeo ha avuto una lunga utilizzazione a scopo funerario dal Iv a tutto il VII secolo; quindi rientra nel processo di abbandono e distruzione del cimitero cristiano e di rifunzionalizzazione di alcuni spazi dello stesso per l'impianto di una officina ceramica medievale.

Agrigento ipogeo P uso funerario IV-VII sec. officina ceramica medievaleSettore L-ANT/08 - Archeologia Cristiana E Medievale
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