Search results for "ontología"
showing 10 items of 1426 documents
True vertical validation in facial orthognathic surgery planning
2013
Objectives: To validate the effectiveness of the original standards of True Vertical (TV) Subnasal Line in orthognatic surgery planning. The present study evaluates the changes occurring in patients with skeletal Class II alterations programmed for orthognathic surgery with a view to improving their facial profile. Study design: We showed a series of black profiles (composed by a first control group of subjects with normal occlusion, and another two additional groups comprised patients before –Group 2- and after orthognatic surgical correction of Class II malocclusion -Group 3-) for three groups of observers (orthodontists, surgeons and laypeople). The facial images became black silhouettes…
Wearing complete dental prostheses - Effects on perioral morphology.
2015
Background: To adequately perform rehabilitation of edentulous patients by a complete removable dental prosthesis (CRDP) is from basic interest to dentists to understand the morphologic changes caused by re-establishment of a physiologic jaw relationship. Anthropometric analyses of standardized frontal view and profile photographs may help elucidate such changes. Material and Methods: Photographs of 31 edentulous patients were compared in relaxed lip closure and after insertion of a CRDP in stable occlusion. 2232 anthropometric distances were raised. Eighteen anthropometric indices reflecting the perioral morphology and its integration in the vertical facial harmony were investigated. Resul…
Bond strength of selected composite resin-cements to zirconium-oxide ceramic
2012
Objectives: The aim of this study was to evaluate bond strengths of zirconium-oxide (zirconia) ceramic and a selection of different composite resin cements. Study Design: 130 Lava TM cylinders were fabricated. The cylinders were sandblasted with 80 μm aluminium oxide or silica coated with CoJet Sand. Silane, and bonding agent and/or Clearfil Ceramic Primer were applied. One hundred thirty composite cement cylinders, comprising two dual-polymerizing (Variolink II and Panavia F) and two autopolymerizing (Rely X and Multilink) resins were bonded to the ceramic samples. A shear test was conducted, followed by an optical microscopy study to identify the location and type of failure, an elec…
Bond strength evaluation of the veneering-core ceramics bonds.
2009
The purpose of this study was to determine whether the bond of veneering porcelain to a ceramic core in bilayered ceramics was similar to that of the metal ceramic control of well known behaviour. Six groups of nine specimens each were fabricated, whose dimensions were 15 mm long and 8 mm in diameter at the core, and 2 mm long and 8 mm in diameter for the veneer. The groups were GR. 1 (control group): CrNi alloy/d.SIGN (Ivoclar), GR. 2: IPS e.maxPress/IPS e.maxCeram (Ivoclar), GR. 3: IPS e.maxZirCad/ IPS e.maxZirPress (Ivoclar), GR. 4: IPS e.maxZirCad/IPS e.maxCeram (Ivoclar), GR. 5: Lava Frame (3M ESPE)/ Lava Ceram (3M ESPE) and GR. 6: Lava Frame (3M ESPE)/IPS e.maxCeram (Ivoclar). A shear…
Caries arresting effect of silver diamine fluoride on dentine carious lesion with S. mutans and L. acidophilus dual-species cariogenic biofilm
2013
OBJECTIVES: This in vitro study investigated the effects of silver diamine fluoride (SDF) on dentine carious lesion with cariogenic biofilm. STUDY DESIGN: Thirty human dentine blocks were inoculated with Streptococcus mutans and Lactobacillus acidophilus dual-species biofilm to create carious lesion. They were equally divided into test and control group to receive topical application of SDF and water. After incubation anaerobically using micro-well plate at 37oC for 7 days, the biofilms were evaluated for kinetics, morphology and viability by colony forming units (CFU), scanning electron microscopy (SEM), and confocal microscopy (CLSM), respectively. The carious lesion underwent crystal cha…
Ghost cell odontogenic carcinoma: a rare case report and review of literature
2014
Objectives: Ghost cell odontogenic carcinoma is a rare condition characterized by ameloblastic-like islands of epithelial cells with aberrant keratinitation in the form of Ghost cell with varying amounts of dysplastic dentina. Material and Methods: We report a case of a 70 year-old woman with a rapid onset of painful swelling right maxillary tumor. Magnetic resonance showed a huge tumor dependent on the right half of the right hard palate with invasion of the pterygoid process and focally to the second branch of the trigeminal. Radiological stage was T4N0. The patient underwent a right subtotal maxillectomy with clear margins. Adjuvant radiotherapy was given. The patient was free of residua…
Dentist attitudes and responsibilities concerning child sexual abuse: a review and a case report
2015
According to the World Health Organization, child abuse and neglect is “every kind of physical, sexual, emotional abuse, neglect or negligent treatment, commercial or other exploitation resulting in actual or potential harm to the child’s health, survival, development or dignity in the context of a relationship of responsibility, trust or power”. The aim of the present report is to inform about the most relevant aspects of child abuse and the characteristics of injuries to the head, neck, and orofacial regions, in addition to the suggested role of, and management by, the dentist for the evaluation of this condition, and also for reporting a case of a physically and sexually abused girl aged…
Day case oral surgery in pediatric patients during the year 2000 in the University of Barcelona Dental Clinic (Spain)
2005
Objetivos: Este trabajo pretende demostrar que se pueden realizar la mayoría de las intervenciones quirúrgicas de la cavidad bucal en la población pediátrica en un medio ambulatorio, así como valorar y mostrar la actividad realizada en el Máster de Cirugía e Implantología Bucal de la Facultad de Odontología de la Universidad de Barcelona durante el año 2000. Diseño del estudio: Para la realización de este trabajo se ha contabilizado la actividad quirúrgica de las unidades de cirugía bucal y cirugía con láser en la población pediátrica en el Máster de Cirugía e Implantología Bucal de la Universidad de Barcelona. Resultados: De las 3187 intervenciones quirúrgicas realizadas en nuestro servici…
Influence of smoking upon the postoperative course of lower third molar surgery
2006
Our objective was to determine whether smoking influences the postoperative course (pain and trismus) of lower third molar surgery, with a clinical evaluation of surgical wound condition and analysis of the possible differences between smokers and nonsmokers. The study subjects were randomly distributed into two groups (smokers and nonsmokers) and subjected to lower third molar extraction in the Unit of Oral and Maxillofacial Surgery (Madrid Complutense University, Spain). The study variables were trismus after 7 days, the intensity of pain and the need for rescue medication during a period of one week. The surgical wound was also assessed (color, presence of plaque, etc.). Two cases of pos…
Study of the analgesic efficacy of Dexketoprofen Trometamol 25mg. vs. Ibuprofen 600mg. after their administration in patients subjected to oral surge…
2004
-Objetivos: Comparar la eficacia analgésica de dos antiinflamatorios no esteroideos (AINES), pertenecientes a la familia de los ácidos propiónicos, tras intervenciones quirúrgicas orales con el fin de valorar cual de ellos es más efectivo con el mínimo de efectos secundarios y la menor dosis. Normalmente el dolor tras una intervención quirúrgica oral está considerado como moderado-intenso, siendo los AINES los fármacos de elección para este tipo de dolor. Como sabemos, el gran problema de estos fármacos reside en los efectos indeseables. Demostramos la eficacia del enantiómero-S(+) de estos fármacos ya que de ellos depende la analgesia y nos permiten utilizar una menor dosis del fármaco. -D…