scholarly journals Pengaruh Kloroform Terhadap Pelarutan Bahan Perekat Yang Menempel Pada Braket Keramik Yang Lepas Dari Gigi

2021 ◽  
Vol 6 (1) ◽  
pp. 9-18
Author(s):  
Ken Edinata ◽  
Endah Mardiati
Keyword(s):  
Shear Strength ◽  
Orthodontic Treatment ◽  
Testing Machine ◽  
Wilcoxon Test ◽  
Comparative Approach ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Ceramic Brackets ◽  
Ceramic Bracket

ABSTRAK Kebutuhan braket transparan pada perawatan ortodonti semakin berkembang dengan adanya kebutuhan braket sewarna gigi, terutama wanita yang memerlukan penampilan estetik maksimal. Braket yang lepas dalam perawatan ortodonti perlu direkatkan kembali. Pembersihan landasan braket yang terlepas sehingga dapat direkatkan kembali akan mengurangi biaya yang harus dikeluarkan pasien. Melakukan daur ulang braket haruslah dapatdapat dilakukan tanpa merubah sifat fisik dan ukuran dari braket tersebut. Penelitian ini adalah penelitian eksperimental analitik laboratoris in vitro dengan pendekatan komparatif yang bertujuan untuk melihat perbedaan kuat rekat geser braket keramik yang dibersihkan dengan kloroform selama 20 menit, 40 menit, 60 menit. Sampel yang digunakan dalam penelitian ini adalah 60 buah braket keramik monokristalin  merek Ice Inspire dari Ormco dengan perlekatan mekanik. Pengukuran uji rekat geser menggunakan Instron Universal Testing Machine dan sisa resin menggunakan skor ARI. Analisis statistik dilakukan dengan uji Wilcoxon dan ANOVA. Hasil penelitian menunjukkan terdapat perbedaan bermakna kuat rekat geser braket keramik pasca rekat yang dibersihkan dengan kloroform selama 20 menit, 40 menit, 60 menit dan braket keramik pascarekat yang baru. Simpulan dari penelitian ini bahwa Terdapat perbedaan kuat rekat geser braket keramik yang dibersihkan dengan kloroform selama 20 menit, 40 menit, 60 menit dengan braket keramik yang baru, Semakin lama waktu pembersihan braket keramik dengan kloroform, sisa resin adhesif akan semakin bersih dan mempunyai kuat rekat geser yang lebih tinggi. Terdapat perbedaan sisa resin adesif antara braket keramik pasca rekat yang dibersihkan dengan kloroform yang dilepas kembali dengan braket keramik pasca rekat yang baru.   Kata Kunci : perbedaan kuat rekat geser, kloroform, kuat rekat geser, ARI, braket keramik.                                                                                                    ABSTRACT Transparant bracket needs in orthodontic treatment is become huge caused the needs of tranlucent bracket , especially women who require maximum aesthetic appearance. Debonding bracket in orthodontic treatment need  to reattached.  By Cleaning mesh of bracket so it can be reattached to reduce patient costs . Recycling bracket must can done without changing the physical properties and the size of bracket. This study is an experimental study in vitro analytical comparative approach that aims to see the difference shear strength adhesion to ceramic brackets were cleaned with chloroform for 20 minutes , 40 minutes , 60 minutes . The sample used in this study were 60 pieces of ceramic bracket monokristalin from Ormco Inspire Ice with mechanical retention. Measurement of shear strength test using the Instron Universal Testing Machine and the rest of the resin using ARI scores . Statistical analysis was used  with Wilcoxon test and ANOVA . The results showed there were significant differences in the bracket shear strength rebonding ceramic bracket, which cleaned with chloroform for 20 minutes , 40 minutes , 60 minutes and new rebonding ceramic bracket. Conclusions from this research that There is a difference in the shear strength ceramic brackets  which cleaned using chloroform for 20 minutes , 40 minutes , 60 minutes and with a new ceramic bracket , the longer time cleaning ceramic bracket with chloroform, the rest of the adhesive resin will be clean and have strong adhesion higher shear. There are differences between the residual resin adhesive after adhesive ceramic bracket cleaned with chloroform is released back and the ceramic new bracket rebonding. Key words : 

scholarly journals Effect of Er:YAG and Er,Cr:YSGG Lasers on Ceramic Bracket Debonding from Composite Blocks

2019 ◽  
Author(s):  
Amir Hossein Mirhashemi ◽  
Seyed Mohammad Hashem Hossaini ◽  
Ardavan Etemadi ◽  
Mohammad Javad Kharazifard ◽  
Abolghasem Bahador ◽  
...  
Keyword(s):  
Bond Strength ◽  
Yttrium Aluminum Garnet ◽  
Er:Yag Laser ◽  
Testing Machine ◽  
Control Group ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Ceramic Brackets ◽  
The Difference ◽  
Ceramic Bracket

Objectives: This study aimed to assess the effect of erbium-doped yttrium aluminum garnet (Er:YAG) and erbium, chromium: yttrium, scandium, gallium, garnet (Er,Cr:YSGG) lasers on the shear bond strength (SBS) of ceramic brackets debonding from the surface of composite blocks. Materials and Methods: Thirty-six composite blocks were fabricated using Filtek Z250 light-cure composite. Block surfaces were etched with 37% phosphoric acid for 30 seconds and then rinsed with water for 20 seconds and dried. Maxillary right central incisor ceramic orthodontic brackets were bonded to the surfaces of composite blocks using Transbond XT adhesive and were cured for 40 seconds. Twelve samples were irradiated with Er:YAG laser, while 12 samples were irradiated with Er,Cr:YSGG laser, and the brackets were then debonded using a universal testing machine. Twelve samples served as controls (debonding using the universal testing machine without using a laser). The adhesive remnant index (ARI) score and bracket or composite cracks were evaluated under a stereomicroscope. One-way analysis of variance (ANOVA) was used for the comparison of the three groups. Kruskal-Wallis test was used to compare the ARI scores. Results: The mean SBS was 17.01±5.22 MPa with Er:YAG laser, 18.03±6.46 MPa with Er,Cr:YSGG laser, and 16.61±6.73 MPa in the control group; the difference of the three groups was not significant (P=0.835). The difference in the ARI scores and enamel and composite cracks was not significant either (P>0.05). Conclusion: This study did not show any reduction in the bond strength of ceramic bracket to composite blocks after Er:YAG and Er,Cr:YSGG laser irradiation.

scholarly journals Efek Ketebalan Semen Ionomer Kaca dan Resin Komposit terhadap Kekuatan Tekan Tumpatan Sandwich

2016 ◽  
Vol 17 (1) ◽  
pp. 8
Author(s):  
Tunjung Nugraheni
Keyword(s):  
Testing Machine ◽  
Universal Testing Machine ◽  
Universal Testing

Tuntutan masyarakat terhadap tumpatan sewarna gigi semakin tinggi. Pada kasus-kasus tertentu teknik restorasi dengan menggunakan dua bahan restorasi yang berbeda (teknik tumpatan sandwich) diperlukan untuk mendapatkan restorasi yang dapat melekat kuat dan mempunyai estetika yang bagus. Teknik tumpatan sandwich yang sering dilakukan adalah menggunakan semen ionomer kaca dan resin komposit. Penelitian ini bertujuan untuk mengetahui efek perbedaan ketebalan semen ionomer kaca dan resin komposit terhadap kekuatan tekan tumpatan sandwich secara in vitro. Pada penelitian ini digunakan 40 subjek penelitian berupa tumpatan sandwich yang dibuat pada cetakan fiber dengan kavitas berbentuk sHinder dengan diameter 5 mm dan tinggi 5 mm. Semua kavitas ditumpat dengan semen ionomer kaca dan resin komposit dengan teknik sandwich, dengan perbandingan ketebalan yang berbeda. Kelompok I dilakukan penumpatan semen ionomer kaca tipe II dan resin komposit packable dengan perbandingan 1:4, kelompok II dengan perbandingan 2:3, kelompok III dengan perbandingan 3:2, kelompok IV dengan perbandingan 4:1. Selanjutnya seluruh subjek penelitian direndam dalam saliva tiruan pH 6,7 dan disimpan pada suhu 370C selama 24 jam dalam inkubator, kemudian diukur kekuatan tekan menggunakan alat uji tekan Universal Testing Machine. Hasil analisis dengan Anava satu jalur menunjukkan perbedaan ketebalan semen ionomer kaca dan resin komposit mempunyai efek yang bermakna terhadap kekuatan tekan tumpatan sandwich (p < 0,05). Hasil uji LSD rerata kekuatan tekan antar kelompok 1,11,III dan IV berbeda bermakna (p < 0,05), dapat disimpulkan bahwa perbedaan ketebalan semen ionomer kaca dan resin komposit berpengaruh terhadap kekuatan tekan tumpatan sandwich.

scholarly journals Evaluation of shear bond strength of different treatments of ceramic bracket surfaces

2012 ◽  
Vol 17 (4) ◽  
pp. 1-8
Author(s):  
Patrícia Helou Ramos Andrade ◽  
Rogério Vieira Reges ◽  
Marcos Augusto Lenza
Keyword(s):  
Shear Bond Strength ◽  
Composite Resin ◽  
Statistical Tests ◽  
Testing Machine ◽  
Test System ◽  
Test Results ◽  
Universal Testing ◽  
Ceramic Brackets ◽  
Composite Resin Restoration ◽  
Ceramic Bracket

OBJECTIVE: To evaluate the bonding strength of the ceramic bracket and composite resin restoration interface, using four types of treatment on the base of the bracket. METHODOLOGY: 48 photoactivated composite resin discs were used (FiltekTM Z250) contained in specimens and divided into 4 groups of 12 specimens for each group according to the type of treatment performed on the base of the brackets. Once the brackets were bonded, the specimens were subjected to shear stress carried out in a universal testing machine (MTS: 810 Material Test System) calibrated with a fixed speed of 0.5 mm / minute. The values obtained were recorded and compared by means of appropriate statistical tests - analysis of variance and then Tukey's test. RESULTS AND CONCLUSIONS: The surfaces of ceramic brackets conditioned with 10% hydrofluoric acid for 1 minute, followed by aluminum oxide blasting, 50µ, after silane application and primer application, was considered the best method to prepare surfaces of ceramic brackets prior to orthodontic esthetic bonding.

scholarly journals Retention of Cast Posts Cemented with Two Commonly Used Conventional and Two Resin Cements and the Mode of Root Fracture Following Their Removal

2021 ◽  
Author(s):  
Azadeh Hesarkhani ◽  
Farnoush Fotovat ◽  
Fatemeh Saneian ◽  
Hosein Akbari ◽  
Hanif Allahbakhshi
Keyword(s):  
Zinc Phosphate ◽  
Testing Machine ◽  
Resin Cement ◽  
Endodontically Treated Teeth ◽  
Root Fracture ◽  
Universal Testing Machine ◽  
Pull Out ◽  
Universal Testing ◽  
Significant Difference

Objectives: This study aimed to compare the retention of cast posts cemented with four types of cements and assess the mode of root fracture following their removal. Materials and Methods: In this in vitro, experimental study, 48 upper central incisors were randomly divided into 4 groups of 12, and were endodontically treated. The fabricated cast posts in each group were cemented with zinc phosphate (Masterdent), glass ionomer (GI; Meron), Meta resin cement, and Panavia SA resin cement. A device was customized for post removal by a universal testing machine similar to WAM X pliers. The retention of cemented posts was measured by the pull-out test in a universal testing machine. Next, the teeth were macroscopically and microscopically inspected regarding the occurrence and sites of catastrophic fracture, cracks, or craze lines. Quantitative and qualitative data were analyzed by ANOVA, and Chi-square test, respectively (P<0.05). Results: ANOVA showed a significant difference in the mean retention of cements (P<0.001). Panavia provided the highest retention (278.6±34.9 N) followed by zinc phosphate (221.9±28.88 N), GI (161.3±60.7 N), and Meta (140.4±66.54 N). There was no significant difference between the groups regarding the pattern of root fracture (P=0.39). However, site and extent of fractures were significantly different among the groups (P<0.05). Conclusion: The conventional cements provided optimal retention and caused less root damage after post removal. Thus, cements providing adequate retention and allowing easier post removal are recommended for use in endodontically treated teeth with a possibility of requiring retreatment.

scholarly journals Fracture strength of teeth restored with milled ultrathin occlusal veneers made of polymer-infiltrated ceramic

2021 ◽  
Vol 32 (5) ◽  
pp. 105-113
Author(s):  
Laerte Ohse ◽  
Deborah Stona ◽  
Marília M. Sly ◽  
Luiz Henrique Burnett Júnior ◽  
Ana Maria Spohr
Keyword(s):  
Fracture Strength ◽  
Testing Machine ◽  
Strength Test ◽  
The Other ◽  
Single Bond ◽  
Third Molars ◽  
Universal Testing Machine ◽  
Universal Testing

Abstract The purpose was to evaluate, in vitro, the fracture strength of teeth restored with 0.3- or 0.6-mm-thick occlusal veneers made of Vita Enamic® bonded to enamel or dentin. Fifty third molars were allocated into five groups (n=10): Group C - control (sound teeth); Group 0.3E - 0.3-mm-thick occlusal veneers bonded to enamel; Group 0.6E - 0.6-mm-thick occlusal veneers bonded to enamel; Group 0.3D - 0.3-mm-thick occlusal veneers bonded to dentin; Group 0.6D - 0.6-mm-thick occlusal veneers bonded to dentin. After luting with Single Bond Universal and Filtek Z-100, the samples were subjected to fracture strength test in a universal testing machine. The fractures were classified as irreparable and reparable. Data were analyzed with 2-way and 1-way ANOVA (α=.05) followed by Tukey’s test. The teeth restored with 0.3-mm-thick occlusal veneers (2658 N) achieved significantly higher fracture strength compared to the teeth restored with 0.6-mm-thick occlusal veneers (2070 N) (p=0.017). The teeth restored with occlusal veneers bonded to enamel (2648 N) had significantly higher fracture strength compared to the teeth restored with occlusal veneers bonded to dentin (2049 N) (p=0.015). Group C (3355 N) and Group 0.3E (2965 N) did not differ significantly from each other, being the fracture strength significantly higher than the other groups (p<0.05). The fractures were predominantly reparable. The teeth restored with 0.3-mm-thick occlusal veneers achieved higher fracture strength compared to the teeth restored with 0.6-mm-thick occlusal veneers. The supporting substrate influenced the fracture strength, which was higher for the teeth restored with occlusal veneers bonded to enamel.

scholarly journals Comparison of Shear Strength of Metal and Ceramic Orthodontic Brackets Cemented to Zirconia Depending on Surface Treatment: An In Vitro Study

2019 ◽  
Vol 13 (02) ◽  
pp. 150-155
Author(s):  
Sibel Cetik ◽  
Thaï Hoang Ha ◽  
Léa Sitri ◽  
Hadrien Duterme ◽  
Viet Pham ◽  
...  
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Surface Preparation ◽  
Orthodontic Brackets ◽  
Airborne Particle ◽  
Ceramic Brackets ◽  
Ceramic Bracket

Abstract Objectives Due to the high demand for all-ceramic restorations, monolithic zirconia restorations are nowadays frequently used. With the demand for adult orthodontic treatments, orthodontists need to be mindful of the quality of their brackets bonding to this type of material, as it requires special conditioning. This study aimed to compare different surface treatments of zirconia when bonding metal or ceramic orthodontic brackets. The objectives are to compare the shear bond strength; the amount of adhesive remaining on the surface of the material; the incidence of adhesive, cohesive, and mixed failures; and the occurrence of zirconia fractures. Materials and Methods Forty monolithic blocks of zirconia of a diameter of 10 mm and a length of 10 mm were prepared and randomly divided into two groups (n = 20): metallic or ceramic brackets. Each group was subsequently divided into two subgroups (n = 10) depending on the surface preparation (laser treatment or airborne particle abrasion): SMB (airborne particle abrasion, metal bracket), SCB (airborne particle abrasion, ceramic bracket), LMB (laser; metal bracket), and LCB (laser, ceramic bracket). The samples were tested for shear bond strength using a universal testing machine. The adhesive remnant index and the occurrence of zirconia fractures and different types of failures were assessed by optical and electron microscopy. Statistical Analysis Results were analyzed using analysis of variance. Results The differences were significant between the metallic (SMB, LMB) and ceramic (SCB, LCB) bracket groups with regard to shear bond strength, with respectively 23.29 ± 5.34 MPa, 21.59 ± 4.03 MPa, 20.06 ± 4.05 MPa, and 17.55 ± 3.88 MPa. In terms of surface treatment, no statistical differences were found between the different groups. Conclusion Metal brackets have a greater bond strength than ceramic brackets when cemented to zirconia. The surface treatment of zirconia surface has no influence on the shear bond strength.

scholarly journals Does the CO2 laser reduce bond strength in different types of ceramic brackets?

2017 ◽  
Vol 22 (2) ◽  
pp. 55-60
Author(s):  
Fábio Lourenço Romano ◽  
Giovanna Pessoti ◽  
Rodrigo Galo ◽  
Jaciara Miranda Gomes-Silva ◽  
Marília Pacífico Lucisano ◽  
...  
Keyword(s):  
Bond Strength ◽  
Co2 Laser ◽  
Testing Machine ◽  
Adhesive Remnant Index ◽  
Different Types ◽  
Tooth Surfaces ◽  
Ceramic Brackets ◽  
Ceramic Bracket ◽  
One Way Anova

ABSTRACT OBJECTIVE: The aim of this study was to assess in vitro the influence of the CO2 laser and of the type of ceramic bracket on the shear bond strength (SBS) to enamel. METHODS: A total of 60 enamel test surfaces were obtained from bovine incisors and randomly assigned to two groups, according to the ceramic bracket used: Allure (A); Transcend (T). Each group was divided into 2 subgroups (n = 15): L, laser (10W, 3s); C, no laser, or control. Twenty-four hours after the bonding protocol using Transbond XT, SBS was tested at a crosshead speed of 0.5 mm/min in a universal testing machine. After debonding, the Adhesive Remnant Index (ARI) was evaluated at 10 x magnification and compared among the groups. Data were analyzed by one-way ANOVA, Tukey’s, Mann-Whitney’s and Kruskal-Wallis tests (α = 0.05). RESULTS: Mean SBS in MPa were: AL = 0.88 ± 0.84; AC = 12.22 ± 3.45; TL = 12.10 ± 5.11; TC = 17.71 ± 6.16. ARI analysis showed that 73% of the specimens presented the entire adhesive remaining on the tooth surfaces (score 3). TC group presented significantly higher SBS than the other groups. The lased specimens showed significantly lower bond strength than the non-lased groups for both tested brackets. CONCLUSION: CO2 laser irradiation decreased SBS values of the polycrystalline ceramic brackets, mainly Allure.

scholarly journals COMPARATIVE EVALUATION OF TENSILE BOND STRENGTH OF ENDODONTIC SEALERS TO DENTIN AND GUTTA PERCHA - AN IN-VITRO STUDY

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Omkar Eswara Babu Danda ◽  
Lakshman Kumar CH ◽  
Afroz Kalmee Syed ◽  
Dasarathi A ◽  
Haranath Danda
Keyword(s):  
Tensile Strength ◽  
Bond Strength ◽  
Testing Machine ◽  
Tensile Bond Strength ◽  
Universal Testing Machine ◽  
Gutta Percha ◽  
Universal Testing ◽  
Ah Plus ◽  
Endodontic Sealers

Introduction: The root canal therapy is done with the intention to seal it off from any fluid leaks, thus enhancing the longevity of the therapy. The seal between the obturating material and the dentinal walls of the root surface is done by the endodontic sealer. The sealer is designed in such a way that it has to mould itself with the curves and follow the shapes of the root dentinal wall. Aims: To compare in-vitro the tensile bond strength of four different endodontic sealers to root dentin and Gutterpercha. Methods: Thirty six single ‑ rooted canine and premolar teeth with total apical formation were selected. Working length was determined after the crown portion was cut. BMP was done. Teeth were grouped as Group Ⅰ: MTA‑ based sealer, Group Ⅱ: Bioceramic Sealer, Group Ⅲ: Calcium based sealer, Group Ⅳ: Epoxy resin based (AH Plus sealer). Sealers were manipulated according to the manufacturer protocol. Obtuartion was done using 4% gutta ‑ percha. Later tensile strength test was done on the root slices of 2 mm thickness using universal testing machine. 6 mm in diameter Aluminum cylinders, were stabilized on the gutta–percha with small amounts of wax and were filled with one of the sealers. After setting each sealer, the drops of wax were removed and the tensile bond strengths of all the samples were measured using universal testing machine. The data was analysed using Tukey tests and ANOVA. Results: Among the 4 groups highest bond strength was found in Group Ⅱ (BioRootTMRCS) (P < 0.05) and the least was Group Ⅰ (MTA Fill apex). Conclusion: Bioceramic sealer’s tensile bond strength was highest followed by AH26, Sealapex and MTA‑ based sealer. Keywords: Bond strength; BioRoot TMRCS Sealer; MTA Fill apex; AH Plus Sealer, Sealapex, tensile strength.

scholarly journals Effect of Interimplant Distance and Cyclic Loading on the Retention of Overdenture Attachments

2017 ◽  
Vol 18 (11) ◽  
pp. 1078-1084 ◽  
Author(s):  
Seyed S Shayegh ◽  
Seyed MR Hakimaneh ◽  
Mohammad T Baghani ◽  
Shireen Shidfar ◽  
Farinaz K Kashi ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Clinical Significance ◽  
Analysis Of Variance ◽  
Significant Role ◽  
Testing Machine ◽  
Acrylic Resin ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
System P

ABSTRACT Aim The purpose of this in vitro study was to investigate the effect of interimplant distance and cyclic loading on the retention of two locator attachment systems. Materials and methods A total of 72 acrylic resin blocks were fabricated and divided into six groups of six pairs each. Locators of DIO and 3i implant systems were positioned on analogs in three different interimplant distances (19, 23, and 29 mm). The blocks were attached to a universal testing machine, and 1,440 dislodging cycles by the force of 136 N were applied. After 0, 120, 360, 720, and 1,440 cycles, the retention was recorded. Three-way analysis of variance (ANOVA) was used to test for differences in retention between the various combinations of the locator, interimplant distance, and cyclic loadings. Results Interimplant distance was significantly associated with retention, independent of the locator system used, and dislodgement force cycles. Mean retention was significantly higher under the 3i system relative to the DIO system (p < 0.0001). This association varied with both interimplant distance (p > 0.0001) and dislodgement force (p < 0.0001) as well as across the various combinations of distance and cycle (p < 0.0001). Conclusion Interimplant distances could affect the initial retention of locator attachments. There was little difference in retention between distances of 23 and 29 mm across all cycles when both locator systems were combined. Distance of 23mm was associated with superior retention in the DIO system. With regard to the speed of retention decrease, the 23 mm distance was associated with better performance. Clinical significance Interimplant distance could play a significant role in overdenture retention with locator attachments. How to cite this article Shayegh SS, Hakimaneh SMR, Baghani MT, Shidfar S, Kashi FK, Zamanian A, Arezoobakhsh A. Effect of Interimplant Distance and Cyclic Loading on the Retention of Overdenture Attachments. J Contemp Dent Pract 2017;18(11):1078-1084.

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