Search results for "RK1-715"

Stanozolol promotes osteogenic gene expression and apposition of bone mineral in vitro

2018

Abstract Stanozolol (ST) is a synthetic androgen with high anabolic potential. Although it is known that androgens play a positive role in bone metabolism, ST action on bone cells has not been sufficiently tested to support its clinical use for bone augmentation procedures. Objective: This study aimed to assess the effects of ST on osteogenic activity and gene expression in SaOS-2 cells. Material and Methods: SaOS-2 deposition of mineralizing matrix in response to increasing doses of ST (0-1000 nM) was evaluated through Alizarin Red S and Calcein Green staining techniques at 6, 12 and 24 days. Gene expression of runt-related transcription factor 2 (RUNX2), vitamin D receptor (VDR), osteopon…

Follow‐up of patients subjected to direct and indirect pulp capping of young permanent teeth. A retrospective study

2021

Abstract Objective A retrospective study of the success rate of direct pulp capping (DPC) and indirect pulp capping (IPC) was carried out in children between 6–14 years‐old, considering separately primary caries or caries affecting teeth with molar incisor hypomineralization (MIH). Material and methods Data were collected in a dental public health service. Following the inclusion criteria, 232 treatments were analyzed. Success was defined by the presence of a functional tooth without clinical signs or symptoms of pulpal or periapical disease. The success rate was correlated to patient gender, the affected tooth and the indication of therapy using the chi‐squared and Fisher exact test. The s…

The influence of change on sense of coherence on dental services use among adolescents: a two-year prospective follow-up study.

2021

Abstract Background To investigate the influence of change on sense of coherence (SOC) on dental services use in adolescents over a two-year period. Methods A prospective follow-up study was conducted involving 334 12-year-old adolescents from public schools in the city of Manaus, Amazonas, Brazil. The predictors of use of dental services in the last 12 months were selected according to the Andersen’s behavioural theoretical model. The predisposing factors included sex, self-reported skin colour and SOC. The enabling factors were dental insurance, monthly family income and parents/guardians schooling. Dental pain, perceived oral health status, dental caries and gingival status were used to …

Correlation of " in vivo" microcirculation and degeneration of the basal cells of the epithelium in lingual lichen planus

2010

Background: Oral lichen planus is an inflammatory chronic disease with an autimmune pathogenesis and unknown etiology that affects oral mucosa, with or without the involvement of the skin and other mucous membranes. The principal histological characteristics are the degeneration of the basal cell layer and the abnormal infiltration of inflammatory cells into the subepithelial layer of connective tissue. Objectives: This study is aimed to appraise if lingual lichen planus (LLP) is sustained by alteration of the oral microcirculation and if this abnormal vascularisation increases the degeneration of basal keratinocytes and the disruption of the basement membrane. Materials and Methods: Fiftee…

Anxiety and facial self-contacts: possible impact on COVID-19 transmission in dental practice

2021

Abstract Background The purpose was to analyse the associations between dental and trait anxiety, fear of COVID-19 and the duration and frequency of spontaneous hand-to-face contact (self-contact). Methods A cross-sectional design was carried out with 128 adult patients from four dental clinics in Madrid, during the confinement, from March 15 to May 15. The patients’ movements in the waiting room were monitored with Microsoft Kinect Software, also completed the Trait anxiety subscale of the STAI, the COVID-19 Fear and the S-DAI questionnaire. Results Associations were observed between the duration and frequency of facial, mask and eye contact with trait anxiety and dental fear was determine…

Dental Implants in the Third Millennium

2018

A Multicultural Demographic Study to Evaluate the Impact of the SARS-CoV-2 Pandemic on the Job Satisfaction across the Dental Industry

2021

ABSTRACT Objective: To evaluate the difference in working conditions as perceived by dentists during the pandemic and their professional satisfaction levels. Material and Methods: An online survey was conducted using the convenience and snowball sampling methods. Two hundred seventy-two respondents across various countries answered information related to socio-demographic data and work satisfaction levels during the SARS-CoV-2 pandemic. Results: 40.1% of dentists reported dissatisfied with their current work, while another 13.6% of dentists fell in the extremely dissatisfied category. 22.8% of dentists were significantly dissatisfied with their current income. Furthermore, 38.4% of the dent…

Experimental evidence of pharmacological management of anchorage in Orthodontics: A systematic review

2015

Introduction: Orthodontic anchorage is one of the most challenging aspects of Orthodontics. Preventing undesired movement of teeth could result in safer and less complicated orthodontic treatment. Recently, several reviews have been published about the effects of different molecules on bone physiology and the clinical side effects in Orthodontics. However, the effects of local application of these substances on the rate of orthodontic tooth movement have not been assessed.Objectives: The aim of this research was to analyze the scientific evidence published in the literature about the effects of different molecules on orthodontic anchorage.Methods: The literature was systematically reviewed …

Influence of the type of reciprocating motion on the cyclic fatigue resistance of reciprocating files in a dynamic model

2021

Abstract Background The aim of this study was to compare the influence of two novel reciprocating movements on the cyclic fatigue resistance of endodontic reciprocating files. Methods 30 Procodile® (Komet Medical, Lemgo, Germany) files were selected in this study and distributed according to the following study groups depending on the movements to be performed: ReFlex Dynamic (n = 10), ReFlex Smart (n = 10) and Reciproc (n = 10) reciprocating movement. These files were fixed to a specific dynamic cyclic fatigue device designed and manufactured by 3D impression to simulate the pecking motion performed by the operator. The time to failure and the number of cycles of in-and-out of the endodont…

Color and photography in the restorative dentistry. A brief communication about color temperature, dental color and the use of light and photography …

2020

Relevance. Optical properties of dental tissues can be captured by photography, considering the characteristics of the light sources. Therefore photography might become a way to communicate the color and the characterizing aspects of the teeth, reducing the misunderstandings between the dental practice and the laboratory in the project of dental restoration. Purpose. To illustrate some ways of using the current photographic technology to document teeth color correctly, and to be able to communicate it without misunderstandings and to replicate it in a simple way. Materials and methods. The photographs were taken using Nikon D500 digital camera, Nikkor 60 mm 2.8 macro lens, Nikon SB-700 Spee…