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- 저자 : Claudio Letizia (검색결과 2 건)
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Comparison between fiber-reinforced polymers and stainless steel orthodontic retainers
Alessandra Lucchese,Maurizio Manuelli,Claudio Ciuffreda,Paolo Albertini,Enrico Gherlone,Letizia Perillo 대한치과교정학회 2018 대한치과교정학회지 Vol.48 No.2
Objective: The aim of this study was to examine the properties of fiberreinforced composite and stainless steel twisted retainers for orthodontic retention. Methods: Three different span lengths (5.0, 8.0, and 14.0 mm) of fiber-reinforced composite were investigated. The three fiber-reinforced composite retainer groups were subdivided according to the storage condition (dry and wet), resulting in a total of six groups. Each stainless steel and fiberreinforced composite group was comprised of six specimens. The threepoint bending flexural test was conducted using a universal testing machine. ANOVA was used to assess differences in the maximum load and maximum stress according to the span length, material, and storage condition. Post-hoc comparisons were performed if necessary. Results: The maximum stress and maximum load were significantly (p < 0.001) associated with the span length, material, and storage condition. The significant interaction between the material and span length (p < 0.001) indicated the differential effects of the material for each span length on the maximum stress and maximum load, with the difference between materials being the highest for the maximum span length. Conclusions: Our findings suggest that fiber-reinforced composite retainers may be an effective alternative for orthodontic retention in patients with esthetic concerns or allergy to conventional stainless steel wires.
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Luigi Petramala,D’Elia Lorenzo,Gino Iannucci,Antonio Concistré,Laura Zinnamosca,Cristiano Marinelli,Giuseppe De Vincentis,Antonio Ciardi,Giorgio De Toma,Claudio Letizia 대한내분비학회 2015 Endocrinology and metabolism Vol.30 No.4
Background: Cushing syndrome (CS) has been described as a killing disease due its cardiovascular complications. In fact, chronic cortisol excess leads to a constellation of complications, including hypertension, hyperglycemia, adiposity, and thromboembolism. The main vascular alteration associated with CS is atherosclerosis. Methods: Aim of this study was to analyze carotid intima-media thickness (cIMT) and ankle-brachial index (ABI), two surrogate markers of subclinical atherosclerosis in a consecutive series of CS patients, compared to patients with essential hypertension (EH) and health subjects (HS). Results: Patients with CS showed a significant increase (P<0.05) of cIMT (0.89±0.17 mm) compared to EH (0.81±0.16 mm) and HS (0.75±0.4 mm), with a high prevalence of plaque (23%; P<0.03). Moreover, CS patients showed a mean ABI values (1.07±0.02) significantly lower respect to HS (1.12±0.11; P<0.05), and a higher percentage (20%) of pathological values of ABI (≤0.9; P<0.03). Conclusion: In conclusion, we confirmed and extended the data of cIMT in CS, and showed that the ABI represent another surrogate marker of subclinical atherosclerosis in this disease.
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