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Paola Gandini  - - - 
Top co-authors See all
Pekka K. Vallittu

284 shared publications

Department of Biomaterials Science and Turku Clinical Biomaterials Center–TCBC, Institute of Dentistry, University of Turku

Andrea Scribante

92 shared publications

Unit of Orthodontics and Paediatric Dentistry, Section of Dentistry, Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy

Mauro Cozzani

85 shared publications

Via Fontevivo 21 N, 19125 La Spezia, Italy

Maria Francesca Sfondrini

71 shared publications

Unit of Orthodontics and Paediatric Dentistry, Section of Dentistry, Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Italy

Lippo Lassila

40 shared publications

Department of Biomaterial Science and Turku Clinical Biomaterials Centre—TCBC, Institute of Dentistry, University of Turku, 20100 Turku, Finland;(P.K.V.);(L.L.)

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Distribution of Articles published per year 
(2011 - 2018)
Total number of journals
published in
 
12
 
Publications See all
Article 0 Reads 0 Citations Failure load and stress analysis of orthodontic miniscrews with different transmucosal collar diameter Maria Francesca Sfondrini, Paola Gandini, Roberto Alcozer, P... Published: 01 November 2018
Journal of the Mechanical Behavior of Biomedical Materials, doi: 10.1016/j.jmbbm.2018.07.032
DOI See at publisher website
Article 3 Reads 1 Citation Reliability of Orthodontic Miniscrews: Bending and Maximum Load of Different Ti-6Al-4V Titanium and Stainless Steel Temp... Andrea Scribante, Mona A. Montasser, Eman Saad Radwan, Luisa... Published: 05 July 2018
Materials, doi: 10.3390/ma11071138
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Temporary anchorage devices (TADs) have been introduced into orthodontic clinical practice in order to allow tooth movements while avoiding strain on adjacent teeth. Miniscrews are available in the market with different diameters and materials. Accordingly, the purpose of the present report was to measure and compare the forces to bend and fracture different mini implants. Ti-6Al-4V titanium and stainless steel TADs of different manufacturers (Spider ScrewHDC; Mini Implants–Leone; Benefit–Orteam; Storm–Kristal) were evaluated. Two different diameters (1.5 mm and 2.0 mm) were tested. The sample included 10 unused specimens for each group, blocked in an Instron Universal Testing Machine, and a shear load was applied at the neck of the miniscrew. The force to bend the miniscrew was measured at 0.1 mm and 0.2 mm deflections. Also, the maximum force before screw fracture was recorded. Data were submitted for statistical analysis. Results showed significantly higher forces for 2.0 mm than 1.5 mm screws, both at 0.1 mm and 0.2 mm deflections and at maximum load. Moreover, no significant differences were reported between titanium and stainless steel miniscrews of equal diameters.
Article 0 Reads 1 Citation Spot-Bonding and Full-Bonding Techniques for Fiber Reinforced Composite (FRC) and Metallic Retainers Andrea Scribante, Paola Gandini, Paola Tessera, Pekka K. Val... Published: 04 October 2017
International Journal of Molecular Sciences, doi: 10.3390/ijms18102096
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Fiber reinforced Composite (FRC) retainers have been introduced as an aesthetic alternative to conventional metallic splints, but present high rigidity. The purpose of the present investigation was to evaluate bending and fracture loads of FRC splints bonded with conventional full-coverage of the FRC with a composite compared with an experimental bonding technique with a partial (spot-) resin composite cover. Stainless steel rectangular flat, stainless steel round, and FRC retainers were tested at 0.2 and 0.3 mm deflections and at a maximum load. Both at 0.2 and 0.3 mm deflections, the lowest load required to bend the retainer was recorded for spot-bonded stainless steel flat and round wires and for spot-bonded FRCs, and no significant differences were identified among them. Higher force levels were reported for full-bonded metallic flat and round splints and the highest loads were recorded for full-bonded FRCs. At the maximum load, no significant differences were reported among spot- and full-bonded metallic splints and spot-bonded FRCs. The highest loads were reported for full bonded FRCs. The significant decrease in the rigidity of spot-bonded FRC splints if compared with full-bonded retainers suggests further tests in order to propose this technique for clinical use, as they allow physiologic tooth movement, thus presumably reducing the risk of ankylosis.
Article 3 Reads 0 Citations Orthodontic Metallic Lingual Brackets: The Dark Side of the Moon of Bond Failures? Maria Francesca Sfondrini, Paola Gandini, Andrea Gioiella, F... Published: 07 July 2017
Journal of Functional Biomaterials, doi: 10.3390/jfb8030027
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Lingual orthodontics, among both young and adult patients, increased in popularity during last years. The purposes of the present investigation were to evaluate the shear bond strength (SBS) values and Adhesive Remnant Index (ARI) scores of different lingual brackets compared with a vestibular control bracket. One hundred bovine teeth were extracted and embedded in resin blocks. Four different lingual brackets (Idea, Leone; STB, Ormco; TTR, RMO; 2D, Forestadent) and a vestibular control bracket (Victory, 3M) were bonded to the bovine enamel surfaces and subsequently shear tested to failure utilizing a Universal Testing Machine. SBS values were measured. A microscopic evaluation was performed to obtain ARI scores. Statistical analysis was performed at a statistically significant level of p < 0.05 to determine significant differences in SBS values and ARI Scores. No statistically significant variations in SBS were reported among the different groups. Conversely, significant differences were shown in ARI scores among the various groups. Clinical relevance of the present study is that orthodontists can expect similar resistance to debonding forces from lingual appliances as with vestibular brackets.
Article 0 Reads 3 Citations Sella turcica bridging and dental anomalies: is there an association? Andrea Scribante, Maria Francesca Sfondrini, Marco Cassani, ... Published: 07 April 2017
International Journal of Paediatric Dentistry, doi: 10.1111/ipd.12301
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Article 0 Reads 1 Citation Dental Hygiene and Orthodontics: Effect of Ultrasonic Instrumentation on Bonding Efficacy of Different Lingual Orthodont... Andrea Scribante, Maria Francesca Sfondrini, Vittorio Colles... Published: 01 January 2017
BioMed Research International, doi: 10.1155/2017/3714651
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Dental hygienists are often faced with patients wearing lingual orthodontic therapy, as ultrasonic instrumentation (UI) is crucial for oral health. As the application of external forces can lead to premature bonding failure, the aim of this study was to evaluate the effect of UI on shear bond strength (SBS) and on adhesive remnant index (ARI) of different lingual orthodontic brackets. 200 bovine incisors were divided into 10 groups. Four different lingual (STB, Ormco; TTR, Rocky Mountain Orthodontics; Idea, Leone; 2D, Forestadent) and vestibular control (Victory, 3M) brackets were bonded. UI was performed in half of specimens, whereas the other half did not receive any treatment. All groups were tested with a universal testing machine. SBS and ARI values were recorded. Statistical analysis was performed (significance: P = 0.05). TTR, Idea, and 2D lingual brackets significantly lowered SBS after UI, whereas for other braces no effect was recorded. Appliances with lower mesh area significantly reduced their adhesion capacity after UI. Moreover groups subjected to UI showed higher ARI scores than controls. UI lowered SBS of lingual appliances of small dimensions so particular care should be posed avoiding prolonged instrumentation around bracket base during plaque removal. Moreover, UI influenced also ARI scores.
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