1,720,975 research outputs found
Epulide fibrosa calcificata.Presentazione di un caso.
No full textGli autori presentano una rassegna della letteratura sulla etiopatogenesi dell'epulide ed illustrano un caso di epulide calcificata
Atr-ftir analysis of orthodontic invisalign® aligners subjected to various in vitro aging treatments
Full text linkClear and removable tooth aligners for orthodontics treatments have become an increasingly popular alternative to fixed appliances. Even if protocols suggest removing aligners before eating or drinking, most patients retain them when they drink beverages. Alterations in the material during the daily use could determine a reduction in the application forces, affecting the desired orthodontic movement; the knowledge of how this material reacts when subjected to different aging processes is mandatory to establish the predictability of the orthodontic treatment. According to this, the aim of the present study was to assess a new objective approach, coupling spectroscopic and chemometric tools, to evaluate the changes occurring in Invisalign® aligners, the most widely used brand, exposed in vitro to coffee, tea, Coca Cola® and UV radiation for 24 and 48 h. In particular, ATR-FTIR spectroscopy was utilized to characterize, at the molecular level, the chemical and color modifications in the surfaces of the appliances; the obtained data were submitted to PCA and one-way ANOVA and Tukey’s multiple comparison test. Moreover, a colorimetry analysis was carried out to evaluate any changes in color and transparency. Coffee and tea samples displayed the major color changes between the tested groups. The differences highlighted in the spectral features of coffee, tea and UV-treated samples were mainly ascribable to color and transparency changes, because the chemical properties remained unaltered
Impact of oral surgery, with or without amoxicillin, on the oral microbiome, salivary flow and buffering capacity of saliva
Full text linkAntibiotic prophylaxis is not usually recommended in the post-operative period due to tooth extraction operations. However, in more traditional clinical practices, the use of amoxicillin continues to represent the most influential factor in preventing bacterial infections. To evaluate the effectiveness of such an approach in the dental field, a phase IV, randomized, controlled, single-center double-masked clinical study was conducted, according to the split-mouth design. The investigation concerned only simple tooth extraction operations, in which patients were divided into two groups. Only one of the established groups was prescribed antibiotic therapy. Thus, the evolution of the oral microbiome was evaluated through the count of Streptococcus mutants and Lactobacillus, the salivary flow, and the buffering power of the saliva before and after the extraction procedure. Several units reported a significant change in bacterial load in the antibiotic-treated group, from baseline to seven days and fourteen days after surgery. In the same group, however, no substantial changes occurred in the salivary flow and the saliva’s buffering capacity. Given the high complexity of the salivary microbiome and its barrier functions for the human organism against attacks by pathogenic microbes, it is considered necessary to promote further studies aimed at investigating the mutations induced by antibiotic therapy, even if the results emerging from the most recent literature highlights the preventative role of prevention in post-extraction complications. However, given the low incidence of infections even in the absence of prevention, it becomes crucial to investigate how the risks of potential antibiotic resistance can compromise the benefits of antibiotic use
Oral Appliances for Severe Positional Obstructive Sleep Apnea Syndrome: A Case Report
No full textSevere positional obstructive sleep apnea syndrome (POSAS) is a common clinical respiratory disorder with an incidence of 26.7% to 74.5%. Continuous positive airway pressure (CPAP) combined with positional therapy is the gold standard of treatment. However, a mandibular advancement device (MAD) is an effective alternative to CPAP when compliance with CPAP is low or if CPAP is rejected by the patient. A 63-year-old Caucasian male (BMI 26.1 kg/m2) complaining of repeated episodes of daytime sleepiness and heavy snoring was diagnosed with POSAS and treated with a MAD. After two years, polysomnographic (PSG) control analysis showed a significant reduction in the number of obstructive sleep apnea/hypopnea episodes per hour (AHI) by 58.9% in the lateral position and 75.5% in the supine position, complete remission of symptoms, a significant reduction in the severity of POSAS, and an overall improvement in quality of life. No adverse events or reduction in compliance were observed during the follow-up period. For severe POSAS, MADs may be an alternative method that is well tolerated by patients and has a good safety profile
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
Noma: a reappraisal in Western countries - are HIV-negative immunocompetent adult patients safe?
No full textWe present 3 cases of Noma occurred in HIV-negative immunocompetent Caucasian women in different clinical conditions, affected by some degree of malnutrition and poor oral health status. Each of these patients presented with an oral ulcer, characterized by non-specific histology and microbiological culture. Diagnosis of Noma was based on clinical findings and a proper therapy was undertaken. Antibiotic and antifungal therapy was combined with the use of nasogastric nutrition, oral hygiene measures and wound healing treatment. The lesions healed, and clinical conditions improved in all the patients. No recurrence was observed during follow-up period
Unconventional use of Invisalign® in the treatment of ectopic palatal maxillary canines
Full text linkBackground: The proper development of the dental arches, including the eruption and correct positioning of the canines in the arch, is essential for the oral health of growing patients. Impacted canines not only give rise to functional challenges but also pose esthetic issues for patients. The aim of this article is to show if it is possible to benefit from the exclusive use of transparent aligners to guide the eruption of ectopic upper canines into the arch in the correct position. Case report: The subject of the study is the clinical case of a 13-year-old female growing patient who presented displaced upper permanent canines located in the palatal ectopic site. Following the surgical extraction of the retained deciduous elements, treatment with aligners for repositioning the ectopic canines in the arch was performed in two phases. At the end of the treatment, a Class I canine was achieved with satisfactory repositioning of the upper canines in the arch. Conclusion: The use of transparent aligners makes it possible, with some procedural precautions and in carefully selected cases, to reposition the ectopic palatal canines in the dental arch using a treatment that is both esthetic and effective
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