Search results for " graf"

Nonunion and malunion in proximal humerus fractures

2020

Proximal humerus fractures are common injuries and the development of nonunion or malunion is infrequent. However, these complications can occur with both operative and non-operative treatment of the fracture. A complete evaluation of these patients must include an investigation of the original fracture, bone and soft tissue quality as well as an extensive radiological study with X-Ray, CT and MRI. Asymptomatic and low demanding patients can benefit from conservative treatment, otherwise surgery is necessary. Multiple treatment options exist with no consensus upon the gold standard. The management of these complications is case-specific and needs extensive pre-operative planning. Arthroscop…

Cementless acetabular reconstruction and structural bone-grafting in dysplastic hips. Surgical technique.

2007

BACKGROUND: Studies of acetabular reconstruction with use of cement and bulk bone graft have demonstrated increasing rates of cup failure in patients with dysplastic hips seven years after total hip arthroplasty. Comparable data on the long-term results of bulk bone-grafting done in conjunction with cementless implants are limited. The aim of this study was to review the clinical and radiographic results of autologous bulk bone-grafting in conjunction with a cementless cup. METHODS: From 1987 to 1992, forty-seven patients (forty women and seven men, with an average age of 50.4 years) who had developmental dysplasia of the hip underwent fifty-six total hip arthroplasties and received a struc…

MRI evaluation to predict tendon size for knee ligament reconstruction.

2017

Background The aim of this study is to evaluate a possible correlation between specific anthropometric parameters and sizes of knee tendons commonly used for ACL reconstruction. We hypothesized that specific clinical and radiological knee measurements could be better tendon sizes predictors than age, gender, height and weight. Materials and methods 100 consecutive patients were enrolled and 77 patients met the inclusion criteria of the study. All patients underwent a MRI of the knee with a 1.5 T super conducting MR System. For each patient, anthropometric data such as gender, height, weight, body mass index (BMI) and knee circumference were recorded. Specific MRI knee measurements were perf…

Evaluation of efficacy and biocompatibility of a new absorbable synthetic substitute as a dural onlay graft in a large animal model.

2016

Numerous dura substitutes are commercially available, but no absorbable synthetic dura repair product has been used for both onlay and suture applications.The safety and effectiveness of a new absorbable synthetic substitute composed of Poly-L-lactide microfibers as onlay dural graft were evaluated.Physical properties and performance of the microfibrous synthetic dural substitute implanted as an onlay or suturable grafts were compared with these commercial products, including CODMAN ETHISORB™ Dura Patch and DuraGen™ Dural Graft Matrix, in a canine duraplasty model. The cerebrospinal fluid (CSF) leakage, macroscopic and microscopic observation at 30 and 90 days after implantation were invest…

Treatment of Combined Medial and Lateral Collateral Ligament Insufficiency

2016

The medial and lateral collateral ligament complexes represent primary elbow ligament stabilizers. Injury to these structures may occur because of an elbow dislocation or due to a severe varus or valgus force. Most elbow dislocations are stable once reduced and may be treated conservatively. However, if the elbow remains unstable surgical treatment is recommended. Repair should be anatomical and should restore stability to the elbow in order to permit an early active range of motion. Reconstruction may be required in severe cases and where primary repair is not possible. Depending on the degree of instability, either one or both of the collateral ligament complexes may need to be repaired o…

Norāžu sistēma Jūrmalas skolu bibliotēkās

2015

Bakalaura darba „Norāžu sistēma Jūrmalas skolu bibliotēkās” pētījuma mērķis ir noskaidrot, kā pusaudži novērtē skolas bibliotēkas norādes, to vizuālo izskatu un funkcionalitāti, vai tās atbilst lietotāju vajadzībām un to idejai par lietotājam draudzīgu norāžu sistēmu. Lai realizētu bakalaura darba mērķi, veikts pētījums, izmantojot kvalitatīvās datu vākšanas metodes – novērošana un intervēšana. Pētījumā iegūtie rezultāti ļauj konstatēt, ka pusaudžu lietotāju grupa norādes uzskata par nepieciešamu bibliotēkas sastāvdaļu un lietotāju paustais viedoklis sniedz idejas un ieteikumus, lai izveidotu lietotājiem draudzīgu bibliotēkas norāžu sistēmu.

Cirurgia coronària amb i sense circulació extracorpòria. Morbimortalitat postoperatòria i seguretat a curt i llarg terme

2016

OBJETIUS: Les malalties cardiovasculars representen el 25-40% de totes les morts a Europa i Amèrica del Nord amb una majoria causada per coronariopaties. La cirurgia de revascularització coronària amb circulació extracorpòria (CEC) segueix sent el “gold stàndard” del tractament quirúrugic d’aquesta patologia. Malgrat la millora de les tècniques i l'experiència quirúrgica, part de la morbiditat relacionada amb la cirurgia coronària és causada per la CEC i és per aquest motiu l’augment de procediments de revascularització coronària sense CEC les darreres dècades. L’ objectiu d’aquesta tesi és descriure l’experiència del nostre centre durant 20 anys (1993-2013) en la cirurgia cardiaca de revas…

Nanopiattaforme di Ossido di Grafene perfluorurate: materiali biocompatibili con affinità per l'ossigeno

L’attacco covalente di molecule perfluorurate su ossido di graphene (GO) via sostituzione nucleofila aromatica ha consentito una facile funzionalizzazione delle lamelle di GO.1,2 La performance delle nanopiattaforme perluorurate (GOF) nell’uptake e rilascio di ossigeno è stata valutata in condizioni di pH fisiologico a differenti concentrazioni e temperature, dimostrando una maggiore affinità del materiale perfluorurato GOF rispetto al GO pristino. Anche a basse concentrazioni GOF ha mostrato valori di uptake di ossigeno a saturazione e velocità di diffusione superiori ad altri materiali proposti in letteratura per ingegneria tissutale, per l’ossigenazione cellulare durante la rigenerazione…

Jauns personīgā laika plānošanas algoritms

2019

Mūsdienās indivīdam, kas ir iesaistīts vairākos projektos un aktivitātēs, nereti var uzkrāties ievērojams skaits darāmu darbu. Tiem ir dažādi izpildes termiņi, darbietilpība un svarīgums. Lai savlaicīgi uzsāktu katra darba izpildi, nav pietiekams ņemt vērā tikai darbu izpildes termiņus. Jāņem vērā arī darbu savstarpējas atkarības, darbietilpība, prioritātes un darbu izpildei pieejama laika kalendārs. Šajā darbā autors pēta un definē personīgā laika plānošanas uzdevumu un formulē lietotāja prasības šā uzdevuma risināšanai. Tāpat autors pēta darbu plānošanas algoritmus un rīkus ar mērķi novērtēt iespēju ar tiem atrisināt personīgā la…

Preparazione e caratterizzazione di nanocompositi strutturali costituiti da poliammide e carbonio nanostrutturato

2014

L’obiettivo della presente tesi di dottorato è stato la preparazione e la caratterizzazione di nanocompositi a matrice polimerica contenenti forme allotropiche del carbonio nanostrutturato; tali materiali, grazie alle particolari caratteristiche meccaniche e di rinforzo, trovano applicazione nella fabbricazione di speciali dispositivi individuali come guanti, elmetti, corpetti, etc... Sono state preparate fibre di poliammide (PA) contenenti carbon black (CB), nanoplacchette di grafite (GNP) e nanotubi di carbonio (CNT); per questi ultimi sono stati valutati, inoltre, gli effetti delle loro dimensioni e della funzionalizzazione della loro superficie sulle proprietà di rinforzo dei nanocompos…