RETAINED EXCESS RESIN CEMENT AROUND TISSUE LEVEL IMPLANTS USING TWO DIFFERENT CEMENTATION TECHNIQUES (AN IN VITRO STUDY)

OBJECTIVE: The aim of this in vitro study was to assess the effect of obturation technique and cementation timings on the bonding of fibre-reinforced posts to the root canal walls. METHODS: Twenty extracted teeth were randomly allocated to two groups according to the obturation technique and cementation timing. Central incisors with single canals were used after being decoronated. Every extracted tooth of the {vertical compaction group} (VC) group (n = 10) had been obturated using the {E & Q plus obturation system} with posts cemented in the same day; The other (CO) conventional group (n = 10) teeth were obturated using the conventional lateral compaction technique and posts cemented after one week. “SF“ Fiber posts were used after bonding and cementation using Rely X ARC resin cement with all the endodontically treated teeth. The push-out test was performed in a universal testing machine. Data were analysed by 2 way analysis of variance with Statistical significance was set to 0.05. RESULTS: Heat softened gutta percha group showed more push out the bond strength of the bonded posts than the conventional obturation group (p < 0.05). In the middle region, there was no statistical significance between the two groups while there was significance in the coronal and apical thirds. CONCLUSION: The vertical compaction technique and early cementation improved the bond strength of the resin posts in comparison to the conventional obturation technique with late cementation.

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Effect of surface treatment on the shear bond strength of a resin-based cement to porcelain

Brazilian Dental Journal ◽

10.1590/s0103-64402006000400005 ◽

2006 ◽

Vol 17 (4) ◽

pp. 290-295 ◽

Cited By ~ 25

Author(s):

Marcos Paulo Nagayassu ◽

Luciana Keiko Shintome ◽

Eduardo Shigueyuki Uemura ◽

José Eduardo Junho de Araújo

Keyword(s):

Bond Strength ◽

Surface Treatment ◽

Hydrofluoric Acid ◽

Shear Bond Strength ◽

In Vitro Study ◽

Resin Cement ◽

Vitro Study ◽

Acid Etching ◽

And Control

The purpose of this in vitro study was to evaluate the effect of different surface treatments on the shear bond strength of a resin-based cement to porcelain. Sixty pairs of 50% aluminous porcelain discs were fabricated. In each pair, one disc measured 6 mm in diameter X 3 mm thickness (A) and the other measured 3 mm in diameter X 3mm thickness (B). The specimens were randomly assigned to 6 groups (n=10 pairs of discs), according to the surface treatment: etching with 10% hydrofluoric acid for 2 or 4min (G1 and G2); 50-µm particle aluminum oxide sandblasting for 5 s (G3); sandblasting followed by etching for 2 or 4min (G4 and G5) and control - no treatment (G6). A silane agent was applied to the treated surface of both discs of each pair. Bistite II DC dual-cure resin cement was applied and the B discs were bonded to their respective A discs. Specimens were stored in distilled water at 37ºC for 24 h and were tested in shear strength at a crosshead speed of 2 mm/min. Means in MPa were: G1: 14.21 ± 4.68; G2: 8.92 ± 3.02; G3: 10.04 ± 2.37; G4: 12.74 ± 5.15; G5: 10.99 ± 3.35; G6: 6.09 ± 1.84. Data were compared by one-way ANOVA and Tukey's test at 5% significance level. Bond strength recorded after 2-min acid etching was significantly higher than 4-min etching (p<0.05) and control (p<0.05), but did not differ significantlyfrom sandblasting alone (p>0.05) or followed by etching for 2 or 4 min (p>0.05). Within the limitations of an in vitro study, it may be concluded that 2-min hydrofluoric acid etching produced a favorable micromechanical retention that enhanced resin cement bond strength to porcelain.

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Evaluation and comparison of the effect of different surface treatment modifications on the shear bond strength of a resin cement to titanium: An in vitro study

The Journal of Indian Prosthodontic Society ◽

10.4103/0972-4052.161072 ◽

2015 ◽

Vol 15 (4) ◽

pp. 308 ◽

Cited By ~ 2

Author(s):

TahsinMansur Veljee ◽

CS Shruthi ◽

R Poojya

Keyword(s):

Bond Strength ◽

Surface Treatment ◽

Shear Bond Strength ◽

In Vitro Study ◽

Resin Cement ◽

Vitro Study

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Effect of Four Surface Treatment Methods on the Shear Bond Strength of Resin Cement to Zirconia Ceramics- A Comparative in Vitro Study

JOURNAL FOR CLINICAL AND DIAGNOSTIC RESEARCH ◽

10.7860/jcdr/2014/10104.4872 ◽

2014 ◽

Cited By ~ 2

Author(s):

Varsha Murthy

Keyword(s):

Bond Strength ◽

Surface Treatment ◽

Shear Bond Strength ◽

In Vitro Study ◽

Resin Cement ◽

Vitro Study ◽

Zirconia Ceramics ◽

Treatment Methods

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Evaluation of the sealing ability of resin cement used as a root canal sealer: An in vitro study

Journal of Conservative Dentistry ◽

10.4103/0972-0707.97958 ◽

2012 ◽

Vol 15 (3) ◽

pp. 274 ◽

Cited By ~ 5

Author(s):

RVinod Kumar ◽

CS Shruthi

Keyword(s):

Root Canal ◽

In Vitro Study ◽

Resin Cement ◽

Vitro Study ◽

Root Canal Sealer ◽

Sealing Ability

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Relationship between Implant Geometry and Primary Stability in Different Bony Defects and Variant Bone Densities: An In Vitro Study

Materials ◽

10.3390/ma13194349 ◽

2020 ◽

Vol 13 (19) ◽

pp. 4349

Author(s):

Ahmad Ibrahim ◽

Marius Heitzer ◽

Anna Bock ◽

Florian Peters ◽

Stephan Christian Möhlhenrich ◽

...

Keyword(s):

In Vitro Study ◽

Primary Stability ◽

Tissue Level ◽

Significant Loss ◽

Titanium Implants ◽

Vitro Study ◽

Loss Of Stability ◽

Implant Stability ◽

Bone Level

Aim: This in vitro study aimed to evaluate the effects of implant designs on primary stability in different bone densities and bony defects. Methods: Five implant types (tapered-tissue-level, tissue-level, zirconia-tissue-level, bone-level, and BLX implants) were used in this assessment. The implants were inserted into four different artificial bone blocks representing varying bone-density groups: D1, D2, D3, and D4. Aside from the control group, three different types of defects were prepared. Using resonance frequency analysis and torque-in and -out values, the primary stability of each implant was evaluated. Results: With an increased defect size, all implant types presented reduced implant stability values measured by the implant stability quotient (ISQ) values. Loss of stability was the most pronounced around circular defects. Zirconia and bone-level implants showed the highest ISQ values, whereas tissue level titanium implants presented the lowest stability parameters. The implant insertion without any thread cut led to a small improvement in primary implant stability in all bone densities. Conclusions: Compared with implants with no peri-implant defects, the three-wall and one-wall defect usually did not provide significant loss of primary stability. A significant loss of stability should be expected when inserting implants into circular defects. Implants with a more aggressive thread distance could increase primary stability.

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Evaluation of Fracture Resistance of Reattached Vertical Fragments Bonded with Fiber-reinforced Composites: An in vitro Study

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1365 ◽

2013 ◽

Vol 14 (4) ◽

pp. 573-577 ◽

Cited By ~ 2

Author(s):

S Sujatha Gopal ◽

B Shiva Kumar ◽

P Spoorti ◽

Jeetender Reddy ◽

Jayaprakash Ittigi

Keyword(s):

Fracture Resistance ◽

In Vitro Study ◽

Resin Cement ◽

Vitro Study ◽

Fiber Reinforced Composites ◽

Reinforced Composites ◽

Fiber Reinforced ◽

Polyethylene Fiber ◽

Significant Difference

ABSTRACT Aim Aim of this in vitro study was to evaluate the resistance to fracture of vertically fractured and reattached fragments bonded with fiber-reinforced composites. Materials and methods Root canals of 45 teeth were prepared, and the teeth were intentionally fractured into two separate fragments. Control groups (n = 15 each) consisted unfractured teeth with instrumented and obturated. Fractured teeth were divided into three groups (n = 15) and were attached using (1) dual-cure resin cement (RelyX U100), (2) dual-cure resin cement and polyethylene fiber (Ribbond), (3) dual-cure resin cement and glass fibers (stick-net). Force was applied at a speed of 0.5 mm/min to the root until fracture. Results and statistical analysis Group 1 (RelyX U100 group) demonstrated lowest fracture resistance. Group 4 (control group) showed highest fracture resistance followed by group 2 (Ribbond group) and group 3 (Stick-Net groups). Statistically no significant difference was there between groups 2, 3 and 4. Conclusion Vertically fractured teeth can be treated by filling the root canal space with dual-cure adhesive resin cement or by adding polyethylene fiber or glass fiber to increase the fracture resistance of the reattached tooth fragments, an alternative to extraction. How to cite this article Kumar BS, Spoorti P, Reddy J, Bhandi S, Gopal SS, Ittigi J. Evaluation of Fracture Resistance of Reattached Vertical Fragments Bonded with Fiber-reinforced Composites: An in vitro Study. J Contemp Dent Pract 2013;14(4):573-577.

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Accuracy of digital impressions versus conventional impressions for 2 implants: an in vitro study evaluating the effect of implant angulation

International Journal of Implant Dentistry ◽

10.1186/s40729-021-00355-6 ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Jaafar Abduo ◽

Joseph E. A. Palamara

Keyword(s):

In Vitro Study ◽

Tissue Level ◽

Vitro Study ◽

General Tendency ◽

Digital Impressions ◽

Angle Deviation ◽

Set Up ◽

Similar Accuracy ◽

Distance Deviation

Abstract Background Accurate implant impression is an essential requirement for the fabrication of implant prosthesis. This in vitro study evaluated the accuracy of digital impressions by intraoral scanner (IOS) systems in comparison to conventional impressions for recording the position of 2 parallel implants and 2 divergent implants. Materials and methods In vitro 3-unit prosthesis master models with 2 tissue level implants were fabricated; one model had parallel implants, and the other model had one 15° tilted implant. The conventional open-tray impressions were obtained with non-splinted (NSP) and splinted (SP) impression copings. Trios 4 (TS), Medit i500 (MT), and True Definition (TD) were used to make digital impressions with scan bodies. A total of 10 impressions were obtained with every technique. The virtual test images of the conventional and digital impressions were converted to 2 virtual implant images. For each group, trueness, precision, inter-implant distance deviation, and angle deviation were measured. Results There was a general tendency for digital impressions to provide a more accurate outcome for trueness, precision, and angle deviation. The 2 conventional impressions showed similar accuracy, except for the angle deviation, where the NSP was significantly inferior than SP (p < 0.01) for the divergent implants model. The TD was generally the least accurate among all the IOS systems, especially for the inter-implant distance deviation (p < 0.05). Conclusions Within the limitations of the laboratory set-up of the present study and the limited clinical resemblance, the digital impressions appeared to have sufficient accuracy for 2 implants and were least affected by the presence of angle between implants. The most inferior outcome was observed for the NSP technique.

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