ABSTRACT
This study aimed to evaluate and compare the optical properties of supra-nano spherical filled resin composites and the nanofilled, nano-hybrid and microhybrid composites using the Kubelka-Munk Theory. Diffuse reflectance of samples (Shade A2) was measured against white and black backgrounds, using a spectroradiometer, using a viewing booth with D65 illuminant and d/0º geometry. S and K coefficients and T were calculated using Kubelka-Munk's equations. The spectral behavior of S, K and T was similar for all dental resin composites analyzed (VAF close to 100%), even though they were, generally, statistically different (p≤0.05). The K-M T values overestimate the real value of Transmittance of the resin composites. Supra-nano spherical filled resin composites show the highest scattering and Transmittance when compared with the others materials, probably due to the shape and size of the filler. Such difference should be taken into consideration in a clinical situation to reproduce natural esthetic restorations.
Subject(s)
Composite Resins , Dental Materials , Color , Humans , Materials TestingABSTRACT
PURPOSE: To compare the immediate implant success rates between sites with chronic apical lesions and healthy sites in the same patients 1 year postdelayed loading. MATERIALS AND METHODS: One hundred sixty-eight immediate implants were placed in sixty patients at upper incisor, canine, and premolar sites. A split-mouth design was used, placing a minimum of two implants, one in a fresh socket associated with chronic periapical disease, the average lesion size was larger than 4 mm and less than 8 mm (test group), and the other(s) in a healthy fresh socket (control group). Implant survival rate at 1 year postloading delayed was compared between the groups. RESULTS: The implant survival rate was 98.2% for the total sample (n = 168); out of the three implants lost, two were from the test group, and one was from the control group (in the same patient as one of the former). Among the surviving implants, five were also considered failures due to excessive bone loss (n = 3) and also because of the recurrence of the periapical lesions (n = 2). Survival rates were significantly lower in the test than control sites at 12 months postloading. CONCLUSIONS: Implant survival rates were significantly lower after the immediate implantation in postextraction sockets associated with chronic periapical disease (90.8%) than in healthy postextraction sockets (98.1%).
Subject(s)
Dental Implants , Tooth Apex/pathology , Adolescent , Adult , Aged , Female , Follow-Up Studies , Humans , Male , Middle Aged , Treatment Outcome , Young AdultABSTRACT
OBJECTIVES: The objective was to analyze the impact of preventive programmes on oral quality of life in school students aged 11-12 yrs. STUDY DESIGN: In the school year 1996/97, a quasi-experimental study was initiated in Granada province with four groups of students aged 6-7 yrs: Sealant + Fluoride (sealants on first permanent molars applied in the health centre for a 3-yr active programme, and fluoride varnish applied every four months for 3 yrs, n=65), Sealant (only sealants, n=80), Fluoride (only fluoride varnish, n=107) and Control group (n=59). All students were examined every 6 months at school during the 3-yr active programme and received an oral health report after each examination. At 5.5 yrs (school year 2002/03), after 2.5 yrs with no programme, students were again examined and completed a questionnaire on oral quality of life scored from -6 (minimum) to +6 (maximum). RESULTS: Oral quality of life values (+/- standard deviation) were: 3.31+/-0.30 (Sealant + Fluoride), 3.11+/-0.27 (Sealant), 3.18+/-0.23 (Fluoride) and 2.95+/-0.32 (Control), with no statistically significant differences among them. CONCLUSIONS: Fissure sealant and fluoride varnish programmes had no significant influence on oral quality of life after a 5.5- yr follow-up (3 yrs of active programme plus 2.5 yrs of discontinuation).
Subject(s)
Health Promotion , Program Evaluation , Quality of Life , Tooth Diseases/prevention & control , Child , Humans , Preventive Dentistry , Surveys and QuestionnairesABSTRACT
No disponible
Subject(s)
Humans , Male , Female , Child, Preschool , Oral Health , Mouth Diseases/epidemiology , Dental Health Surveys , Diagnosis, Oral/methods , Dental Health Services/statistics & numerical data , Dental Caries/epidemiology , Tooth, DeciduousABSTRACT
Objetivos: El objetivo es analizar el impacto de programas preventivos sobre la calidad de vida oral en escolares de 11- 12 años. Diseño del estudio: En el curso académico 1996/97 se inició un estudio quasiexperimental en la provincia de Granada con cuatro grupos de escolares de 6-7 años de edad: Sellador + Flúor (selladores en primeros molares permanentes aplicados en el centro de salud, durante 3 años de programa activo, y barniz de flúor aplicado cuatrimestralmente durante 3 años, n=65), Sellador (sólo selladores, n=80), Flúor (sólo barniz de flúor, n=107) y grupo Control (n=59). Todos los escolares fueron explorados cada 6 meses en los colegios durante los 3 años de programa activo, entregándoseles un informe de salud oral tras cada exploración. Tras un periodo de discontinuidad de 2.5 años, en el curso escolar 2002/03 (a los 5.5 años), los escolares fueron explorados, y se les pasó un cuestionario de calidad de vida oral, cuya puntuación va de -6 (mínima) a +6 (máxima). Resultados: Los valores de calidad de vida oral (± desviación estándar) fueron: 3.31±0.30 (Sellador + Flúor), 3.11±0.27 (Sellador), 3.18±0.23 (Flúor) y 2.95±0.32 (Control), sin diferencias estadísticamente significativas entre ellos. Conclusiones: Los programas de Sellador de fisuras y Barniz de flúor no muestran influencia significativa sobre la calidad de vida oral a 5.5 años de seguimiento (3 años de programa activo y 2.5 años de discontinuidad)
Objectives: The objective was to analyze the impact of preventive programmes on oral quality of life in school students aged 11-12 yrs. Study design: In the school year 1996/97, a quasi-experimental study was initiated in Granada province with four groups of students aged 6-7 yrs: Sealant + Fluoride (sealants on first permanent molars applied in the health centre for a 3-yr active programme, and fluoride varnish applied every four months for 3 yrs, n=65), Sealant (only sealants, n=80), Fluoride (only fluoride varnish, n=107) and Control group (n=59). All students were examined every 6 months at school during the 3-yr active programme and received an oral health report after each examination. At 5.5 yrs (school year 2002/03), after 2.5 yrs with no programme, students were again examined and completed a questionnaire on oral quality of life scored from -6 (minimum) to +6 (maximum). Results: Oral quality of life values (± standard deviation) were: 3.31±0.30 (Sealant + Fluoride), 3.11±0.27 (Sealant), 3.18±0.23 (Fluoride) and 2.95±0.32 (Control), with no statistically significant differences among them. Conclusions: Fissure sealant and fluoride varnish programmes had no significant influence on oral quality of life after a 5.5- yr follow-up (3 yrs of active programme plus 2.5 yrs of discontinuation)
Subject(s)
Male , Female , Child , Humans , Evaluation of Results of Preventive Actions/methods , Dental Caries/prevention & control , Oral Health , School Health Services , Fluoridation , Pit and Fissure Sealants/therapeutic useABSTRACT
No disponible
