1,721,093 research outputs found
M. Pesce. Paolo e gli arconti a Corinto
No full textNautin Pierre. M. Pesce. Paolo e gli arconti a Corinto. In: Revue de l'histoire des religions, tome 196, n°1, 1979. pp. 98-99
Consensus Report by the Italian Academy of Osseointegration on the Use of Antibiotics and Antiseptic Agents in Implant Surgery
No full textPurpose: Beneficial aspects of short and ultrashort antibiotic administration protocols could be clinically correlated to the reduced side effects on the gastrointestinal microflora. The aim of this Consensus Conference was to establish the necessity of an antibiotic prophylaxis and its dosage to reduce the risk of early implant failure in healthy (ASA 1 or 2), periodontally healthy patients, undergoing basic dental implant surgery (straightforward cases). Additionally, the need for an antiseptic protocol, used before and after the implant surgery, was evaluated. Materials and Methods: Active members of the Italian Academy of Osseointegration (IAO), together with several worldwide-recognized key opinion experts in the field of microbiology, implant dentistry, and infectious diseases, were participants at this Consensus Conference. Two systematic reviews were carried out, before the Consensus Conference, and their results discussed in order to give guidelines on the administration of an antibiotic/antiseptic prophylaxis in implant surgery. The systematic reviews covered the following topics: (1) the use of antibiotics to reduce both implant failure rate and peri-implant infections in healthy patients and (2) the use of chlorhexidine compositions capable of reducing complications in patients undergoing surgical interventions. Results: The main statements reached by the assembly were as follows: (1) Rinsing with chlorhexidine is highly recommended before and after implant surgery to minimize the bacterial load. (2) A single dose of antibiotics in straightforward cases is recommended. (3) In complex cases (long surgical time, regeneration procedures), it is advisable to continue the antibiotic administration. Conclusion: This Consensus Conference advocates the administration of a unique dose of antibiotics in straightforward implant cases combined with the use of chlorhexidine
Consensus Report by the Italian Academy of Osseointegration on the Use of Graft Materials in Postextraction Sites
No full textPurpose: After tooth extraction, a modeling and remodeling phase of bone and soft tissues occurs. It has been fully demonstrated that bone resorption as high as 50% can take place regarding ridge width and a variable amount concerning ridge height, making it difficult to perform implant surgery. Materials and methods: Active members of the Italian Academy of Osseointegration (IAO) participated in this Consensus Conference, and three systematic reviews were conducted before the meeting to provide guidelines on alveolar ridge preservation procedures. The systematic reviews covered the following topics: (1) What material best preserves the dimensions of the ridge horizontally and vertically?; (2) what material favors the formation of the highest quantity of new bone?; (3) which technique would best seal the socket?; and (4) what effect does alveolar ridge preservation have on soft tissues? Results: The main conclusions reached by the assembly were that alveolar ridge preservation is advisable after dental extraction, particularly in esthetic areas, in proximity of anatomical structures (ie, maxillary sinus, inferior alveolar nerve, and mental foramen), whenever the treatment plan requires delayed placement, and whenever patients ask to postpone implant insertion for various reasons. Socket debridement is advised before the use of a "regenerative material," and xenograft is considered the gold standard material to maintain ridge dimensions. Another indication is antibiotic therapy, which is recommended in the case of alveolar ridge preservation (amoxicillin 2 g 1 hour before the intervention and 1 g every 12 hours for 6 days). A membrane or autologous soft tissue should be used to seal the socket and protect the regenerative material, and the indicated reentry time (implant insertion) is 4 to 6 months. Conclusion: This Consensus Conference agreed that the adoption of alveolar ridge preservation can effectively prevent physiologic bone loss, especially in esthetic areas. It is recommended to cover the xenograft material with a membrane or autologous soft tissue, and antibiotic therapy is advisable
Influence of modified titanium abutment surface on peri-implant soft tissue behaviour: A systematic review of histological findings
No full textPURPOSE: The purpose of the present systematic review was to investigate at the histological level if a modified titanium surface abutment could affect the behaviour of soft peri-implant tissue (connective tissue adhesion and soft tissue inflammation). MATERIALS AND METHODS: An electronic databases research (MEDLINE/PubMed, Scopus, Web of Science, Cochrane Library) until 24 June 2019 for randomised controlled trials (RCTs), controlled clinical trials and non-randomised studies of interventions (NRSI) was performed. The focused question was: "In healthy patients with at least one titanium healing abutment connected to a dental implant, is the effect of a healing abutment surface modification different from machined titanium at the histological level?" The Cochrane Handbook for Systematic Reviews of Interventions to assess the risk of bias in individual studies was used for RCTs. The Newcastle-Ottawa quality assessment scale was used to evaluate NRSI. RESULTS: In total, 192 records were evaluated for titles and abstracts. Seven studies were included in the review. Five of them reported an enhanced soft tissue adhesion in the modified abutment group without increasing the soft tissue inflammation. One study reported no significant differences among titanium-modified (double acid-etched) and titanium-machined groups. One author demonstrated at the 6-month follow-up period a higher level of inflammation around acid-etched surfaces, with a higher number of T and B lymphocytes and expression of vascular endothelial growth factor. CONCLUSIONS: Short-term data (< 6 months) suggested an enhanced connective fibre attachment next to titanium abutments with a modified surface and a similar inflammatory response, in comparison with machined surface titanium abutments. However, modified surfaces may lead to a long-term increased risk of a higher degree of inflammation in the peri-implant tissues. Due to limited available evidence, further long-term studies are needed to confirm these results
Titanium abutment surface modifications and peri-implant tissue behavior: a systematic review and meta-analysis.
Full text linkOBJECTIVES
To evaluate the effect of various titanium abutment modifications on the behaviour of peri-implant soft tissue healing, inflammation and maintenance.
MATERIAL AND METHODS
An electronic database research until 30 April 2019 was performed. A meta-analysis (MA) for each outcome parameter was performed by using the random-effects models with the DerSimonian-Laird estimator.
RESULTS
Ten studies were included in the present review. Four studies with a long follow-up (5-6 years) reported the outcomes in a heterogeneous way and were suitable for MA. Six studies (4 RCT, 2 CCT) including 118 patients and 182 implants dealing with a modified healing abutment surface and short follow-up were selected for MA. The MA for PI and BoP as outcome showed no significant differences between surfaces (PI: P = 0.091; BoP: P = 0.099). The MA for PD as outcome showed no significant differences between surfaces (P = 0.488). No statistical significance was found by evaluating each mixed-effects model for potential moderators (type of study, study design, number of implants, follow-up length). The other four studies with a longer follow-up (5-6 years) reported contradictory results depending on the surface treatment investigated.
CONCLUSIONS
Within their limits, the present findings suggest that peri-implant soft tissue may not be affected by the surface treatment of titanium abutments on the short term. Contrasting results are reported in longer follow-up periods depending on the technique used to modify the abutment.
CLINICAL RELEVANCE
Clinicians should carefully evaluate the use of a modified titanium surface in their practice. Even if no differences in terms of inflammation are present at short term, these findings need to be validated in long-term studies
The TV Recap: Knowledge, Memory, and Complex Narrative Orientation.
No full textIn the world of digital media, populated by new paratexts and short forms, there are certain textual structures that, despite appearing subordinate to other texts, play vital functions and yet remain little studied. This article investigates the recap (recapitulation), beginning with the general hypothesis that they constitute narrative devices in which brevity serves 1) as a resource that takes those elements of ephemeral narratives that are destined otherwise to be forgotten, and converts them into persistent elements within the audience’s memory; and 2) as a resource for self-orientation, in temporal but also spatial terms, within serial forms that span years of programming and take up long periods of the user’s consumption experience. Following the introduction, the discussion highlights how the problem of summary has been addressed in relation to literature, and what changes when it is applied to the context of serialized television (in the second section). The third section identifies three contexts for the study of recaps: its collocation within serial forms, its two principal types, and the most important functions that it adopts (summary, a guide to the narrative components of a series, spatial orientation, regulation of the spectator’s meta-discursive capacity). The fourth section is devoted to the ways in which the recap interacts with the viewer by controlling sets of knowledge and recognition. The fifth proposes conclusions in two areas: the first reads the recap not only as a summary-tool for narrative universes but also as a kind of map that allows us to move within such universes; the second expands on the role of the recap in the construction and maintenance of our recollection of long serial forms
Clinical outcomes of using a prosthetic protocol to rehabilitate tissue-level implants with a convergent collar in the esthetic zone: A 3-year prospective study
No full textStatement of problem: Whether increasing the space for peri-implant soft tissues by using implant systems with conical or convergent transmucosal components would improve tissue stability and esthetics is unclear. Purpose: The purpose of this prospective clinical study was to evaluate the clinical and esthetic outcomes of using tissue-level implants with a convergent collar in the esthetic zone that had been rehabilitated following the biological oriented preparation technique (BOPT) approach after a 3-year follow-up period. Material and methods: Sixteen participants with at least 1 nonrestorable tooth in the maxillary anterior region or with congenitally missing maxillary lateral incisors were enrolled, and tissue-level implants with a convergent collar were inserted 3 months after extraction. The implants were restored with cemented single crowns designed according to the BOPT protocol. Bone resorption and the pink esthetic score were evaluated over a 3-year period. Results: Fifteen participants (mean age: 54.6 years) were evaluated over the 3-year period (total: 16 implants). One participant with 1 implant relocated dropped out of the study. The 3-year implant cumulative survival rate was 100%. The mean ±standard deviation bone-level change was 0.071 ±0.11 mm. The mean pink esthetic score was 8.5 ±1.59, range 4-10. Conclusions: The use of the BOPT protocol to restore tissue-level implants with a convergent collar achieved good esthetic results and maintained stable soft and hard peri-implant tissue
Consensus Report by the Italian Academy of Osseointegration on the Use of Antibiotics and Antiseptic Agents in Implant Surgery
No full textBeneficial aspects of short and ultrashort antibiotic administration protocols could be clinically correlated to the reduced side effects on the gastrointestinal microflora. The aim of this Consensus Conference was to establish the necessity of an antibiotic prophylaxis and its dosage to reduce the risk of early implant failure in healthy (ASA 1 or 2), periodontally healthy patients, undergoing basic dental implant surgery (straightforward cases). Additionally, the need for an antiseptic protocol, used before and after the implant surgery, was evaluated
Five-year cohort prospective study on single implants in the esthetic area restored using one-abutment/one-time prosthetic approach
No full textPurpose: This study was aimed to investigate, over 5 years, bone response to "one-abutment onetime" (OA-OT) protocol in the restoration of implants inserted in the anterior maxilla. Additionally, influence of soft tissue biotype in the bone remodeling was investigated. Materials and Methods: From January 2011 to January 2012, all consecutive patients presented with a hopeless tooth in the maxillary area between canines were enrolled. Post-extraction ridge preservation was performed. After 6 months, implant was midcrestaly inserted and intraoperative impression was taken. Two months thereafter an immediate definitive abutment with a provisional crown was inserted. At final crown connection, patients underwent a standardized periapical radiograph (T0). At 12 (T1), 24 (T2), 36 (T3), 48 (T4), and 60 (T5) months, radiographic follow-up and clinical control were carried out. Independent sample t-test was conducted to compare bone loss at different times. To detect the potential role of biotype, groups (thick TK vs thin TH) were compared by analysis of variance with general linear model. Results: Twenty-five patients were enrolled, but only 22 patients concluded the study. The radiographic analysis showed a stable longitudinal condition of bone levels after the first-year significant increasing (0.17±0.25mm, 0.33±0.25mm, 0.28±0.27mm, 0.25±0.26mm, 0.31±0.35mm, and 0.31±0.29mm, respectively at T1, T2, T3, T4, and T5). No statistical significant differences in bone loss among the two groups TH vs TK over the time (P=0.952) were demonstrated. Conclusion: Results showed that the OA-OT approach allow to obtain stable bone levels
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