Cic edizioni internazionali
Annali di stomatologia

Torque expression of a customized lingual appliance according to different elastomeric ligatures over time: an in vitro study

Original Article, 59 - 64
doi: 10.11138/ads/2018.9.2.059
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Aim: Torque control in lingual orthodontics is essential to obtain optimal aesthetic results, nevertheless three dimensional control of anterior teeth depends on many factors and the role of ligatures in establishing the engagement of the wire into the slot is considered as a key point. The aim of this in vitro experimental study was to evaluate how different ligatures exposed to usage degradation perform in maintaining torque control in a customized lingual bracket appliance using two differently sized wires.
Materials and methods: A typodont with eight extracted human teeth was created and a set of customized lingual brackets was obtained. Lingual ligatures and ordinary ligatures were tested on the 0.016x0.022 NiTi and the 0.016x0.024 SS wires using a compression/traction machine to calculate the efficiency in torque control. For each wire and type of ligature, the typodont was stored in physiological saline Sodium- Chloride 0.9%, pH 5.5 to simulate the oral environment for one month and then the mechanical test was repeated.
A statistical analysis was performed. Annali di Stomatologia 2018;VIII (2):59-64 59
Results: No significant differences were found in angle values between ligatures or timepoints when the complete set of data was tested (p>0.01).
Conclusions: The ligature type and stretching by use did not affect torque efficiency during the first month.

Photodynamic therapy on a biofilm monospecie of candida albicans: an in vitro study

Original Article, 65 - 71
doi: 10.11138/ads/2018.9.2.065
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Antimicrobial photodynamic therapy (aPDT) is a medical treatment based on the use of a light source at a specific wavelength that activates a photosensitive molecule causing the formation of oxidizing agents that provokes the death of the target cells. The aim of this study was to evaluate the activity of aPDT against biofilms of Candida albicans. Biofilms of C.albicans were subjected to aPDT using a diode GaAlAs (λ:635nm) and a toluidin blue solution (0.1mg/ml) as photosensitizer.
Three different protocols (1 minute, fluence 24J/cm2; 2 minutes, fluence 48J/cm2 and 3 minutes, fluence 72J/cm2) were tested. To evaluate the number of Candida cells in biofilm before and after treatment, Bio Timer Assay was used. Candida biofilms treated with aPDT showed significant reductions of the microbial population as compared to the control groups. aPDT showed good antifungal properties in vitro. Clinical trials are needed to test its efficacy in vivo and to propose it as an adjuvant or alternative therapy to conventional medical treatment.

The effect of a brushing motion inside a sequence: an in vivo study

Original Article, 72 - 76
doi: 10.11138/ads/2018.9.2.072
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The aim of the present study was twofold: to propose a new methodology to analyze instrumentation stress in vivo by measuring the torque provided by an endodontic motor during the clinical use of the nickel-titanium rotary (NTR) instruments; and to compare the advantage of brushing techniques in reducing operative torque. 40 canals were divided in two groups (n=20) and prepared by a skilled endodontist using TF 35. 04. rotary instruments (KerrEndo, Orange, Ca). In one group, a 30 s brushing was previously performed with a (TF 25.06) to increase flaring. All instruments were rotated at 500 rpm with maximum torque set at 2,5 N using an endodontic motor (Kavo, Biberach, Germany), which automatically records and saves torque and speed values every 1/10 seconds. Data were recorded and statistically analyzed with the significance level set at p.
Previous coronal flaring (brushing) with the first instrument (size 25, taper 06) significantly reduced instrumentation torque (both mean and maximum torque values), time and number of steps needed by the second instruments (size 35, taper 04) to reach working length.
The development of new and more sophisticated means of analysing torque during intracanal shaping provides useful information for a better understanding of the instruments performance in vivo, aiming at improving efficacy and safety.

The effect of vitamin C on urinary level of an oxidative stress biomarker during at-home tooth bleaching process: a randomized double blinded clinical trial

Original Article, 77 - 83
doi: 10.11138/ads/2018.9.2.077
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Introduction: Oxidizing agents which are used as tooth whitening agents can induce an oxidative stress, a situation that initiates some systemic diseases. This clinical study aims to evaluate the effect of ascorbic acid (vitamin c) on urinary level of an oxidative stress biomarker during the athome tooth whitening period.
Material and methods: Thirty healthy patients who requested for the tooth whitening were involved in this trial. Specified bleaching trays were fabricated for both arches after making an impression. Each participant was given two syringes containing 15% carbamide peroxide gel and instructed to apply it for 6 h per night for 14 consecutive nights.
Patients were divided into two equal groups. In the experimental group, the patients applied two tablets containing 500 mg of vitamin C every night along with the tooth whitening period. Urine samples were obtained in the morning before the study was started and were repeated in 5, 10, 15th days and five days after the expiration of the bleaching period. TBARS test was employed to evaluate the urinary level of malondialdehyde (MDA) as an oxidative stress biomarker. Data were analyzed by means of independent sample t-test and repeated measurement analysis.
Results: Twenty-nine subjects completed the study. The MDA level increased during the bleaching period in both groups; however, the difference was not significant (P>0.05). In addition, the ascorbic acid application could not present a significant difference in the MDA level (P= 0.34).
Conclusion: The application of 15% carbamaide peroxide did not significantly elevate the oxidative stress biomarker in human urine (IRCTID: IRCT2012113011618N1).

Computer-guided bone lid osteotomy with piezosurgery

Case report, 84 - 90
doi: 10.11138/ads/2018.9.2.084
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Aim: The aim of this paper is to present a case of mandibular cyst in proximity to the left inferior alveolar nerve and the adjacent teeth successfully treated with computer-guided bone lid technique.
Case presentation: A patient was referred to our Department with an asymptomatic radiolucent lesion in the left mandible coinciding with the edentulous site of a second premolar. The lesion was confirmed using cone-beam computed tomographic imaging. Two tooth-supported computeraided design/computer-aided manufacturing guided surgical templates were designed and produced to guide the piezoelectric tips on the planned osteotomy planes. The cystic lesion was accessed through a buccal bone lid fashioned using a piezoelectric device. The lesion was removed and the bone lid was returned to its original position and stabilized with fixation microplates.
Conclusions: Alveolar bone lesions can be treated successfully with bone lid techniques using piezosurgery. Computer-guided bone surgery offers the advantages of accurate and conservative surgical planning, enabling a safer and easier procedure.

Resonance frequency evaluation on immediate loading implants with angled abutments: case series

Original Article, 91 - 96
doi: 10.11138/ads/2018.9.2.091
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Aim: Immediate loading of implant-supported prosthesis is a predictable and standardised therapy for rehabilitation of partially and totally edentulous patients. The present case series evaluate implant success rates by measuring resonance frequency on immediate loading implants with angled abutments.
Materials and methods: A prospective study was performed on five partially edentulous patients. Twenty-six Neoss ProActive Tapered® (Neoss Ltd. Harrogate, UK) implants were inserted: 22 in the maxillary bone and 4 in the mandibular bone.
The Osstell ISQ® (Osstell; Integration Diagnostics, Göteborg, Sweden) was used to evaluate implant stability. Implant Stability Quotient (ISQ) measurements were performed in three stages: at time of implant insertion (t0), after three (t1) and 12 (t2) months. The ISQ values were recorded after implant installation of Access® (Neoss Ltd. Harrogate, UK) during the different stages.
Results: A six month- follow-up showed implant survival of 96%. Twenty-four implants were osseointegrated, a maxillary implant was lost and one other implant was excluded from the study. The values of ISQ ranged between 53-88 ISQ (average 66 ± 6.1 ISQ, median 67 ISQ) at t0, 51-80 ISQ (average 70 ± 5.8 ISQ, median 70 ISQ) at t1 and 53-80 ISQ (average 70.8 ± 5.7 ISQ, median 72 ISQ) at t2.
Conclusions: The 24 successful implants out of 25 in 5 patients demonstrate how using 4-6 implants guarantees sufficient anchorage for a fixed prosthesis and adequate distribution of the prosthetic load on the maxillary and mandible bones, without causing implants failures.

Vol. 9 (No. 2) 2018 May-August

  1. Torque expression of a customized lingual appliance according to different elastomeric ligatures over time: an in vitro study
    Migliorati M., Poggio D., Drago S., Lagazzo A., Stradi R., Barberis F., Silvestrini-Biavati A.
    doi: 10.11138/ads/2018.9.2.059
  2. Photodynamic therapy on a biofilm monospecie of candida albicans: an in vitro study
    Palaia G., Tenore G., Del Vecchio A., Pergolini D., Tramutola L., Berlutti F., Romeo U.
    doi: 10.11138/ads/2018.9.2.065
  3. The effect of a brushing motion inside a sequence: an in vivo study
    Gambarini G., Seracchiani M., Piasecki L., Galli M., Valenti Obino F., Di Nardo D., Testarelli L.
    doi: 10.11138/ads/2018.9.2.072
  4. The effect of vitamin C on urinary level of an oxidative stress biomarker during at-home tooth bleaching process: a randomized double blinded clinical trial
    Akbari M., Nemati-Karimooy A., Hashemy S.I., Mohammadipour H.S.
    doi: 10.11138/ads/2018.9.2.077
  5. Computer-guided bone lid osteotomy with piezosurgery
    Sivolella S., Brunello G., Fincato A., De Stavola L.
    doi: 10.11138/ads/2018.9.2.084
  6. Resonance frequency evaluation on immediate loading implants with angled abutments: case series
    Notaro V., Rapone B., Cagnetta G., Sportelli P., Nardi G.M., Corsalini M.
    doi: 10.11138/ads/2018.9.2.091
Last Viewed articles: la lista degli ultimi x visitati.
  1. Resonance frequency evaluation on immediate loading implants with angled abutments: case series
    Notaro V., Rapone B., Cagnetta G., Sportelli P., Nardi G.M., Corsalini M.
    doi: 10.11138/ads/2018.9.2.091
  2. Computer-guided bone lid osteotomy with piezosurgery
    Sivolella S., Brunello G., Fincato A., De Stavola L.
    doi: 10.11138/ads/2018.9.2.084
  3. The effect of vitamin C on urinary level of an oxidative stress biomarker during at-home tooth bleaching process: a randomized double blinded clinical trial
    Akbari M., Nemati-Karimooy A., Hashemy S.I., Mohammadipour H.S.
    doi: 10.11138/ads/2018.9.2.077
  4. The effect of a brushing motion inside a sequence: an in vivo study
    Gambarini G., Seracchiani M., Piasecki L., Galli M., Valenti Obino F., Di Nardo D., Testarelli L.
    doi: 10.11138/ads/2018.9.2.072
  5. Photodynamic therapy on a biofilm monospecie of candida albicans: an in vitro study
    Palaia G., Tenore G., Del Vecchio A., Pergolini D., Tramutola L., Berlutti F., Romeo U.
    doi: 10.11138/ads/2018.9.2.065
  6. Torque expression of a customized lingual appliance according to different elastomeric ligatures over time: an in vitro study
    Migliorati M., Poggio D., Drago S., Lagazzo A., Stradi R., Barberis F., Silvestrini-Biavati A.
    doi: 10.11138/ads/2018.9.2.059
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