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Birte Melsen - One of the best experts on this subject based on the ideXlab platform.

  • Clinical comparison between a modified light-curing denture base Resin and a Conventional Composite Resin for orthodontic bonding.
    Progress in orthodontics, 2003
    Co-Authors: Lucia Rizzo, Vittorio Cacciafesta, Birte Melsen
    Abstract:

    The purpose of this in vivo study was to evaluate and compare the bond failure rate of a modified visible light-cured denture base Resin (Triad VLC Provisional Material; Dentsply International Inc., York, PA) with that of a Conventional visible light-cured Composite Resin (Transbond XT; 3M/Unitek, Monrovia, CA) for the bonding of orthodontic brackets. Both adhesives were used in each patient following a split-mouth design. Thirty-five consecutive patients with fixed appliances were included in the study, and the performance of 655 stainless steel brackets was evaluated: 325 brackets were bonded with the modified Triad VLC Resin and 330 were bonded with Transbond XT Resin. The incidence and site of bond failures were recorded over a period of 12 months. The overall failure rate of Triad VLC (4.3%) was not significantly different (p>0.05) from that of Transbond XT (3.6%). No significant differences in the failure rates of upper and lower arches within each material or between the two materials were found (p>0.05). Transbond XT showed a significantly higher failure rate (p

  • clinical comparison between a modified light curing denture base Resin and a Conventional Composite Resin for orthodontic bonding
    Progress in Orthodontics, 2003
    Co-Authors: Lucia Rizzo, Vittorio Cacciafesta, Birte Melsen
    Abstract:

    The purpose of this in vivo study was to evaluate and compare the bond failure rate of a modified visible light-cured denture base Resin (Triad VLC Provisional Material; Dentsply International Inc., York, PA) with that of a Conventional visible light-cured Composite Resin (Transbond XT; 3M/Unitek, Monrovia, CA) for the bonding of orthodontic brackets. Both adhesives were used in each patient following a split-mouth design. Thirty-five consecutive patients with fixed appliances were included in the study, and the performance of 655 stainless steel brackets was evaluated: 325 brackets were bonded with the modified Triad VLC Resin and 330 were bonded with Transbond XT Resin. The incidence and site of bond failures were recorded over a period of 12 months. The overall failure rate of Triad VLC (4.3%) was not significantly different (p>0.05) from that of Transbond XT (3.6%). No significant differences in the failure rates of upper and lower arches within each material or between the two materials were found (p>0.05). Transbond XT showed a significantly higher failure rate (p<0.05) in the anterior (4.8%) than in the posterior teeth (1.6%). The present findings demonstrate that Triad VLC could be used as an alternative bonding material for direct bonding of orthodontic brackets.

Sekar Mahalaxmi - One of the best experts on this subject based on the ideXlab platform.

  • Marginal integrity of aesthetic restorations following intracoronal bleaching with sweet potato extract as an additive: An SEM study.
    Heliyon, 2020
    Co-Authors: Gurucharan Ishwarya, Sampath Vidhya, Sekar Mahalaxmi
    Abstract:

    The aim of this in vitro study was to evaluate the marginal integrity of an alkasite restoration in comparison to that of a Conventional Composite Resin restoration following intra-coronal bleaching with 30% hydrogen peroxide (HP) containing sweet potato extract (SPE) as an additive. Access cavities were prepared in 60 extracted human incisors. The teeth were decoronated 2mm below the CEJ and the pulp chambers were sealed cervically. The samples were divided into two groups (n = 30) based on the type of restorative material - group I: Hybrid Composite Resin and group II: Alkasite restorative material. Both the groups were divided into three subgroups (n = 10) based on the intra-coronal bleaching agent used namely, subgroup A: no bleaching (NB); subgroup B: 30% hydrogen peroxide (HP) and subgroup C: 30% hydrogen peroxide containing SPE (HSP). The tooth-restorative interface was observed under a scanning electron microscope (SEM) to determine the marginal integrity. The results were tabulated and statistically analyzed using one-way ANOVA. Specimens bleached with HP alone showed higher marginal gaps, irrespective of the restorative material used. Subgroups A and C showed lesser marginal gaps under both the restorative materials. An improved marginal integrity was seen with the alkasite material. It can be concluded that the addition of SPE to HP improves the marginal integrity of the coronal restorative material placed immediately post-bleaching. The new alkasite material holds promise as a permanent coronal seal in cases of intra-coronal bleaching.

  • Fracture Resistance of Endodontically Treated Teeth Restored with 2 Different Fiber-reinforced Composite and 2 Conventional Composite Resin Core Buildup Materials: An In Vitro Study.
    Journal of endodontics, 2017
    Co-Authors: Ashly Mary Eapen, L. Vijay Amirtharaj, Kavitha Sanjeev, Sekar Mahalaxmi
    Abstract:

    Abstract Introduction The purpose of this in vitro study was to comparatively evaluate the fracture resistance of endodontically treated teeth restored with 2 fiber-reinforced Composite Resins and 2 Conventional Composite Resin core buildup materials. Methods Sixty noncarious unrestored human maxillary premolars were collected, endodontically treated (except group 1, negative control), and randomly divided into 5 groups (n = 10). Group 2 was the positive control. The remaining 40 prepared teeth were restored with various direct core buildup materials as follows: group 3 teeth were restored with dual-cure Composite Resin, group 4 with posterior Composite Resin, group 5 with fiber-reinforced Composite Resin, and group 6 with short fiber-reinforced Composite Resin. Fracture strength testing was performed using a universal testing machine. The results were statistically analyzed by 1-way analysis of variance and the post hoc Tukey test. Fracture patterns for each sample were also examined under a light microscope to determine the level of fractures. Results The mean fracture resistance values (in newtons) were obtained as group 1 > group 6 > group 4 > group 3 > group 5 > group 2. Group 6 showed the highest mean fracture resistance value, which was significantly higher than the other experimental groups, and all the fractures occurred at the level of enamel. Conclusions Within the limitations of this study, a short fiber-reinforced Composite can be used as a direct core buildup material that can effectively resist heavy occlusal forces against fracture and may reinforce the remaining tooth structure in endodontically treated teeth.

Vittorio Cacciafesta - One of the best experts on this subject based on the ideXlab platform.

  • Clinical comparison between a modified light-curing denture base Resin and a Conventional Composite Resin for orthodontic bonding.
    Progress in orthodontics, 2003
    Co-Authors: Lucia Rizzo, Vittorio Cacciafesta, Birte Melsen
    Abstract:

    The purpose of this in vivo study was to evaluate and compare the bond failure rate of a modified visible light-cured denture base Resin (Triad VLC Provisional Material; Dentsply International Inc., York, PA) with that of a Conventional visible light-cured Composite Resin (Transbond XT; 3M/Unitek, Monrovia, CA) for the bonding of orthodontic brackets. Both adhesives were used in each patient following a split-mouth design. Thirty-five consecutive patients with fixed appliances were included in the study, and the performance of 655 stainless steel brackets was evaluated: 325 brackets were bonded with the modified Triad VLC Resin and 330 were bonded with Transbond XT Resin. The incidence and site of bond failures were recorded over a period of 12 months. The overall failure rate of Triad VLC (4.3%) was not significantly different (p>0.05) from that of Transbond XT (3.6%). No significant differences in the failure rates of upper and lower arches within each material or between the two materials were found (p>0.05). Transbond XT showed a significantly higher failure rate (p

  • clinical comparison between a modified light curing denture base Resin and a Conventional Composite Resin for orthodontic bonding
    Progress in Orthodontics, 2003
    Co-Authors: Lucia Rizzo, Vittorio Cacciafesta, Birte Melsen
    Abstract:

    The purpose of this in vivo study was to evaluate and compare the bond failure rate of a modified visible light-cured denture base Resin (Triad VLC Provisional Material; Dentsply International Inc., York, PA) with that of a Conventional visible light-cured Composite Resin (Transbond XT; 3M/Unitek, Monrovia, CA) for the bonding of orthodontic brackets. Both adhesives were used in each patient following a split-mouth design. Thirty-five consecutive patients with fixed appliances were included in the study, and the performance of 655 stainless steel brackets was evaluated: 325 brackets were bonded with the modified Triad VLC Resin and 330 were bonded with Transbond XT Resin. The incidence and site of bond failures were recorded over a period of 12 months. The overall failure rate of Triad VLC (4.3%) was not significantly different (p>0.05) from that of Transbond XT (3.6%). No significant differences in the failure rates of upper and lower arches within each material or between the two materials were found (p>0.05). Transbond XT showed a significantly higher failure rate (p<0.05) in the anterior (4.8%) than in the posterior teeth (1.6%). The present findings demonstrate that Triad VLC could be used as an alternative bonding material for direct bonding of orthodontic brackets.

  • Direct bonding of cast splint Herbst appliances: A clinical comparison between a Resin‐reinforced glass ionomer adhesive and a Composite Resin
    Progress in Orthodontics, 2002
    Co-Authors: Vittorio Cacciafesta, Hans Ulrik Paulsen
    Abstract:

    The purpose of this study was to compare the clinical performance of a Resin-modified, self-cured glass ionomer adhesive for bonding cast splint Herbst appliances to that of a Conventional Composite Resin in a split-mouth design. Ten patients (six females and four males) with cast splint Herbst appliances were followed for a mean period of 7±1 months. The performance of 40 cobalt-chromium cast splints was evaluated: 20 cast splints were bonded with GC Fuji Ortho glass ionomer adhesive (GC America Inc., Alsip, IL, USA), and 20 bonded with Excel Composite Resin (Reliance Orthodontic Products Inc., Itasca, IL, USA). Excel recorded an overall failure rate (20%), which was higher than GC Fuji Ortho (15%), but not significantly different (p>0.05). There were no statistically significant differences (p>0.05) between the failure rates in the upper and lower arches within each material and between the two bonding agents. This study demonstrates that Resin-modified, self-cured glass ionomers can be recommended as alternative materials for bonding cast splint Herbst appliances.

Matthias Kern - One of the best experts on this subject based on the ideXlab platform.

  • durability of the Resin bond strength to zirconia ceramic after using different surface conditioning methods
    Dental Materials, 2007
    Co-Authors: Mona Wolfart, Frank Lehmann, Stefan Wolfart, Matthias Kern
    Abstract:

    Objectives. The purpose of this in vitro study was the evaluation of the bond strength and its durability of two Composite Resins to zirconia ceramic after using different surface conditioning methods. Methods. Plexiglas tubes filled with Composite Resin were bonded to zirconia ceramic discs (Cercon) which were either in their original state as supplied by the manufacturer only cleaned in isopropanol or were cleaned with an air–powder–water spray with sodium hydrocarbonate solution or were air abraded (50 mA l 2O3). Groups of 20 specimens each were bonded either with a Conventional Composite Resin (Variolink II) or with a phosphate monomer (MDP)-containing Resin (Panavia F) to the ceramic discs. Subgroups of 10 bonded specimens were stored in distilled water (37

  • Durability of the Resin bond strength to zirconia ceramic after using different surface conditioning methods.
    Dental materials : official publication of the Academy of Dental Materials, 2006
    Co-Authors: Mona Wolfart, Frank Lehmann, Stefan Wolfart, Matthias Kern
    Abstract:

    The purpose of this in vitro study was the evaluation of the bond strength and its durability of two Composite Resins to zirconia ceramic after using different surface conditioning methods. Plexiglas tubes filled with Composite Resin were bonded to zirconia ceramic discs (Cercon) which were either in their original state as supplied by the manufacturer only cleaned in isopropanol or were cleaned with an air-powder-water spray with sodium hydrocarbonate solution or were air abraded (50 microm Al(2)O(3)). Groups of 20 specimens each were bonded either with a Conventional Composite Resin (Variolink II) or with a phosphate monomer (MDP)-containing Resin (Panavia F) to the ceramic discs. Subgroups of 10 bonded specimens were stored in distilled water (37 degrees C) for either 3 days or for 150 days. Additionally, the 150 days specimens were thermal cycled 37,500 times. Statistical analyses were conducted with the Wilcoxon rank sum test adjusted by Bonferroni-Holm. The initial tensile bond strength (TBS) for Variolink II ranged from 9.0 to 16.6 MPa and were significantly lower (p< or =0.05) than for Panavia F ranging from 18.7 to 45.0 MPa. Air abrasion resulted in significantly higher TBS (p< or =0.01) than the two other surface conditioning methods. After 150 days storage, only the air abraded specimens bonded with Panavia F showed high bond strengths of 39.2 MPa, whereas most other specimens debonded spontaneously or showed very low bond strengths. The use of the MDP-containing Composite Resin Panavia F on air abraded zirconia ceramic can be recommended as promising bonding method.

Peter H. Gordon - One of the best experts on this subject based on the ideXlab platform.

  • Bond strengths of orthodontic bonding materials: an in-vitro study.
    British journal of orthodontics, 1991
    Co-Authors: Nigel A. Fox, John F. Mccabe, Peter H. Gordon
    Abstract:

    The shear bond strength of a Conventional Composite Resin was compared in-vitro with the bond strength of a fluoride releasing Composite and a glass ionomer cement. The results obtained showed that the Conventional Composite had the highest mean bond strength. The results were also analysed using the weibull analysis which examines bond reliability rather than mean bond strength. It is likely that the two Composites will behave in a similar manner in the clinical situation.