1,720,970 research outputs found
EFFECT OF DISTANCE BETWEEN ONE PIECE IMPLANTS ON CRESTAL BONE RESORPTION
No full textOne-piece implants became incorporate the trans-mucosal abutment facing the soft tissues as an integral part of the implant. The interface between the trans-mucosal component and the implant is generally located in the neighbourhood of the alveolar bone level. One-piece implant are usually welded together and immediately loaded. Since no report is available on the effect of distance between implants on clinical outcome, a retrospective study was performed.
Nineteen patients (10 females and 9 males) with a median age of 62 years (min-max 43-80) were enrolled. The mean follow-up was 7 months. A total of 176 one-piece implants (Diamond, BIOIMPLANT, Milan, Italy) were inserted. Among them 11 failed (i.e. survival rate – SVR = 93.75). The remaining 165 were studied as regard peri-implant bone resorption. Since 4 fixtures have a crestal bone resorption higher than 1.5 mm, the success rate (SCR) was 97.57. Log rank testing was used to compare success curves.
Statistical analysis demonstrated that an average distance between fixtures of about 2 mm does not determine an higher crestal bone resorption when one-piece implants are used.
In conclusion one-piece implants are reliable devices for oral rehabilitation and distance between fixtures of about 2 mm does not determine an higher crestal bone resorption
EFFECT OF ONE-PIECE IMPLANT DIAMETER ON CLINICAL OUTCOME
No full textOne-piece implants incorporate the trans-mucosal abutment facing the soft tissues as an integral part of the implant. The interface between the trans-mucosal component and the implant is generally located in the neighbourhood of the alveolar bone level. One-piece implant are usually welded together and immediately loaded. Since no report is available on the effect of fixture diameter on clinical outcome, a retrospective study was performed.
Nineteen patients (10 females and 9 males) with a median age of 62 years (min-max 43-80) were enrolled. The mean follow-up was 7 months. A total of 176 one-piece implants (Diamond, BIOIMPLANT, Milan, Italy) were inserted. Implant’ diameter was narrower than 4 mm, equal to 4 mm and wider than 4 mm in 12, 97 and 67 fixtures, respectively. Pearson Chi-Square test was used to detect if implant diameter has an impact both on failures (SVR, i.e. lost fixtures) and/or on success (SCR, i.e. crestal bone resorption around implants lower than 1.5 mm).
In our series SVR and SCR were 93.75 and 97.57, respectively. Statistical analysis demonstrated that diameter has no direct impact on survival (i.e. lost implants) as well as on clinical success (i.e. crestal bone resorption).
In conclusion one-piece implants are reliable devices for oral rehabilitation (since they have a SVR = 93.75 and a SCR = 97.57) and implant diameter does not have statistically significant impact on implant failures and crestal bone resorptio
IMPACT OF ONE-PIECE IMPLANT LENGTH ON CLINICAL OUTCOME
No full textOne-piece implants became incorporate the trans-mucosal abutment as an integral part of the implant. The interface between the trans-mucosal component and the implant is generally located in the neighbourhood of the alveolar bone level. One-piece implant are usually welded together and immediately loaded. Since no report is available on the effect of fixture length on clinical outcome, a retrospective study was performed.
Nineteen patients (10 females and 9 males) with a median age of 62 years (min-max 43-80) were enrolled. The mean follow-up was 7 months. A total of 176 one-piece implants (Diamond, BIOIMPLANT, Milan, Italy) were inserted. Implant’ length was shorter than 13 mm, equal to 13 mm and longer than 13 mm in 40, 39 and 97 fixtures, respectively. Pearson Chi-Square test was used to detect if implant diameter has an impact both on failures (SVR, i.e. lost fixtures) and/or on success (SCR, i.e. crestal bone resorption around implants lower than 1.5 mm).
In our series SVR and SCR were 93.75 and 97.57, respectively. Statistical analysis demonstrated that length has no direct impact on survival (i.e. lost implants) as well as on clinical success (i.e. crestal bone resorption).
In conclusion one-piece implants are reliable devices for oral rehabilitation (since they have a SVR = 93.75 and a SCR = 97.57) and implant length does not have statistically significant impact on implant failures and crestal bone resorptio
Aggiornamenti sulla distribuzione di Cucujus cinnaberinus e di altri Cucujoidea (Coleoptera, Nitidulidae, Cucujidae, Laemophloeidae).
No full text
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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
EVALUATION OF A NEW NANO-COATING ON IMPLANT OSSEOINTEGRATION: A STUDY ON SPIRAL FIXTURES INSERTED IN NEW ZEALAND WHITE RABBITS
No full textTitanium is the gold standard among materials used for prosthetic devices because of its good mechanical and chemical properties. When exposed to oxygen, titanium becomes an oxide that is biocompatible and able to induce osseointegration. There are three allotropic forms of titanium dioxide: brookite, rutile and anatase. Anatase can be prepared as a colloidal suspension and then used to coat surfaces. Anatase coating (AC) can potentially have specific biologic effects.
Here we test the effect of AC on bone throughout an in vivo study by using spiral dental implants covered with AC and then inserted in rabbit tibia.
The histologic analysis has demonstrated that (1) bone growth is equal around AC and standard fixtures but (2) AC fixtures have an antibacterical propriety that protect implants from subsequent peri-implantitis.
This study demonstrated that AC implant inserted in rabbit tibia guarantee a good osseointegration of normal titanium implants giving in addition antibacterical propriet
BACTERCLINE® COATED IMPLANTS INSERTED IN MAXILLA GRAFTED WITH BONE FROM LIVING DONOUR: A CASE REPORT
No full textIn the last decade several studies have been performed to evaluate the clinical outcome of implants inserted into grafted maxillae but few focus on maxillae grafted with bone derived from living donors (BDLD).
Bactercline® is an anatase derivate which has anti-bacteria proprieties. There are new implant coated with Bactercline®.
In January 2010, a 50 year-old female was referred to the Maxillofacial Department of Galeazzi Hospital (Milan, Italy) who had a diagnosis of severely atrophic maxilla which was grafted with BDLD. After 4 months 11 implants were inserted. To evaluate the clinical outcome several variables (i.e. relate to the anatomy, implant, and prosthesis) were investigated. Implant failure and peri-implant bone resorption were considered as predictors of clinical outcome. ANOVA text was used to compare standard to Bactercline® covered implants.
The occlusion is stable after 12 months follow-up. No implants were lost. No implant has a crestal bone resorption higher the cut-off value of 1.5 mm. However the mean peri-implant bone resorption was 0.6 ±0.4 mm in 10 Bactercline® coated implants whereas the only standard implant had 0.01 mm of peri-implant bone resorption. No statistical difference was detected (p = 0.282).
These preliminary results shown that no adverse effects on osseointegration were present, and no statistically significant differences Test and Control implants after a mean of 12 months follow-u
- …
