1,721,048 research outputs found
Evaluation of twelve potential aneuploidogenic chemicals by the in vitro human lymphocyte micronucleus assay.
No full textIndagine con misurazioni elettromagnetiche sullo stato sanitario di piante arboree in un parco cittadino.
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
EFFICACY OF FOUR MOTIVATIONAL TECHNIQUES FOR IMPROVING ORAL HYGIENE. TWO-YEAR FOLLOW-UP OF A RANDOMISED CONTROLLED TRIAL
No full textPURPOSE. The aim of this randomised clinical trial with blinded examiner was to compare the efficacy of four different methods of enhancing oral hygiene motivation in: (i) re-ducing the full-mouth plaque score (FMPS) and full-mouth bleeding score (FMBS); (ii) modifying patient behaviour; (iii) the amount of intervention time required; and (iv) the degree of patient satisfaction at two-year follow-up. MATERIALS AND METHODS. In a private practice, 100 subjects aged 18-75 years with at least 20 teeth/implants and an FMPS ≥40% were consecutively recruited. From baseline to two-year follow-up, subjects were randomly allocated to four different oral hygiene motivational techniques: standard oral hygiene instructions (SOHI), reading a pamphlet (P), watching a video (V), or Brief Motivational Interview (BMI). The outcome variables considered were: reduction in FMPS, reduction in FMBS, frequency of daily tooth brushing, frequency of daily flossing, motivational intervention time, degree of patient satisfaction, patient perception of oral health (by means of a questionnaire), and number of teeth lost in association with each method. A single operator delivered all motivational sessions and professional oral hygiene at baseline, and 1, 3, 6, 12, 18, and 24 months. Another operator, blinded to the methods used, recorded the variables at base-line, and at 6, 12, 18, and 24 months. RESULTS. At 24-month follow-up, there were no significant differences between the four tested methods in either FMPS (-20.9 for SOHI,-23.1 for P,-25.1 for V, and-27.1 for BMI; P = 0.4407), FMBS (-1.9 for SOHI,-3.1 for P,-0.7 for V, and-4.0 for BMI; P = 0.3110), degree of patient satisfaction (P = 0.3559), improvement in perception of oral health (P = 0.8069), frequency of daily flossing (P = 0.2118), or number of teeth lost (P = 0.2108). Although the total time required for motivation was significantly greater for the BMI as compared to all other techniques (P <0.0001), the frequency of daily tooth brushing significantly increased after BMI as compared to SOHI and V (the difference between BMI and SOHI was 0.6; 95%CI from 0.2 to 1.0, and the difference between BMI and V was 0.5 95%CI from 0.0 to 0.9; P = 0.0022). CONCLUSIONS. All tested methods improved FMPS and FMBS and were appreciated by all subjects. The change in patient behaviour was more pronounced in the BMI group, but the intervention time required was greater than for the other techniques; nevertheless, it was compatible with a professional oral hygiene session of one-hour duration
Immediate versus early non-occlusal loading of dental implants placed flapless in partially edentulous patients: a 3-year randomized clinical trial.
No full textAbstract
AIM: To compare immediate versus early non-occlusal loading of dental implants placed flapless in a 3-year, parallel group, randomized clinical trial.
MATERIALS AND METHODS: The study was conducted in a private dental clinic between July 2005 and July 2010. Patients 18 years or older were randomized to receive implants for fixed partial dentures in cases of partial edentulism. The test group was represented by immediate non-occlusal implant loading, whereas the control group was represented by early non-occlusal implant loading. The outcome variables were implant failure, complications and radiographic bone level at implant sites 3 years after loading, measured from the implant-abutment junction to the most coronal point of bone-to-implant contact. Randomization was computer-generated with allocation concealment by opaque sequentially numbered sealed envelopes, and the measurer was blinded to group assignment.
RESULTS: Sixty patients were randomized: 30 to the immediately loaded group and 30 to the early loaded group. Four patients dropped out; however, the data of all patients were included in the analysis. No implant failure occurred. Two complications occurred in the control group and one in the test group. The mean bone level at 3 years was 1.91 mm for test group and 1.59 mm for control group. The adjusted difference in bone level was 0.26 mm (CI 95% -0.08 to 0.59, p = 0.1232).
CONCLUSION: The null hypothesis of no difference in failure rates, complications and bone level between implants that were loaded immediately or early at 3 years cannot be rejected in this randomized clinical trial
Lateral bone augmentation applying different biomaterials: A clinical and histological evaluation of a case report
No full textIntroduction: This paper describes the treatment of horizontal osseous defects around implants in a one-stage splitmouth approach in a middle-aged female patient. Method and Material: The same identical reconstruction technique was performed in both surgical sites using different biomaterials: a ß-tricalciumphosphate (Ceros TCP granules) grafting material and a porcine, collagen pericardium resorbable membrane (Remotis) were employed on the test side and a deproteinized, bovine bone matrix (Bio-Oss) and a porcine, collagen resorbable membrane (Bio-Gide) on the control side. Bone substitutes were mixed with autologous bone (approximately 10 %) harvested during implant insertion procedures. Results: Substantial bone regrowth was evident in both ridges, although only the test side underwent complete regeneration. Histological examination of the regenerated areas showed the presence of mature bone organized around particles of biomaterial during the incorporation phase. Conclusion: Both therapeutic approaches have proved favorable in terms of covering the initially exposed implant threads. © Deutscher Ärzte-Verlag
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