scholarly journals Accurate Bracket Placement with an Indirect Bonding Method Using Digitally Designed Transfer Models Printed in Different Orientations—An In Vitro Study

2021 ◽  
Vol 10 (9) ◽  
pp. 2002
Author(s):  
Julia Süpple ◽  
Julius von Glasenapp ◽  
Eva Hofmann ◽  
Paul-Georg Jost-Brinkmann ◽  
Petra Julia Koch
Keyword(s):  
In Vitro Study ◽  
Angular Dimension ◽  
3D Printer ◽  
Digital Light Processing ◽  
Indirect Bonding ◽  
Bonding Method ◽  
Plaster Models ◽  
Transfer Accuracy ◽  
Transfer Models

Objective: A digital workflow opens up new possibilities for the indirect bonding (IDB) of brackets. We tested if the printing orientation for bracket transfer models on the build platform of a 3D printer influences the accuracy of the following IDB method. We also evaluated the clinical acceptability of the IDB method combining digitally planned and printed transfer models with the conventional fabrication of pressure-molded transfer trays. Materials and Methods: In total, 27 digitally planned bracket transfer models were printed with both 15° and 75° angulation from horizontal plane on the build platform of a digital light processing (DLP) printer. Brackets were temporarily bonded to the transfer models and pressure-molded trays were produced on them. IDB was then performed using the trays on the respective plaster models. The plaster models were scanned with an optical scanner. Digitally planned pre-bonding and scanned post-bonding bracket positions were superimposed with a software and resulted in three linear and three angular deviations per bracket. Results: No statistically significant differences of the transfer accuracy of printed transfer models angulated 15° or 75° on the 3D printer build platform were found. About 97% of the linear and 82% of the angular deviations were within the clinically acceptable range of ±0.2 mm and ±1°, respectively. The highest inaccuracies in the linear dimension occurred in the vertical towards the gingival direction and in the angular dimension in palatal crown torque. Conclusion: For the IDB method used, the printing orientation on the build platform did not have a significant impact on the transfer accuracy.

scholarly journals Transfer accuracy of two indirect bonding techniques—an in vitro study with 3D scanned models

2018 ◽  
Vol 40 (5) ◽  
pp. 549-555 ◽  
Author(s):  
Johanna Schmid ◽  
Daniel Brenner ◽  
Wolfgang Recheis ◽  
Philipp Hofer-Picout ◽  
Martin Brenner ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Indirect Bonding ◽  
Transfer Accuracy

scholarly journals Measurement and Comparison of Bracket Transfer Accuracy With Different Indirect Bonding Techniques: An In Vitro Study

2021 ◽  
pp. 030157422110116
Author(s):  
Sonam Rastogi ◽  
Manish Goyal ◽  
Mukesh Kumar ◽  
Kalpit Shitalkumar Shaha ◽  
Ekta Yadav ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Working Models ◽  
Indirect Bonding ◽  
Axis Position ◽  
The Mean ◽  
Mean Differences ◽  
Transfer Accuracy ◽  
Very High ◽  
Selection Of

Objective: To measure and compare bracket transfer accuracy of 3 indirect bonding (IDB) techniques. Material and Methods: Three IDB techniques were studied using polyvinyl siloxane (PVS) putty, vacuum-form (VF), and glue gun (GG). A total of 120 orthodontic stone models were fabricated with die stone, out of which bonding was done on 60 working models and transferred to other 60 patient models. One quadrant was selected for each technique. Digital photography was used to measure the mesiodistal ( X-axis), occlusogingival ( Y-axis), and faciolingual ( Z-axis) position of each bracket on the working and patient models. Results: All the 3 IDB techniques have a very good bracket transfer accuracy. On comparing individual planes, greatest accuracy was seen in GG on X-axis, VF on Y-axis, and VF/PVS on Z-axis. Points A and B were compared for bracket rotation and the mean differences were insignificant indicating that there was no significant amount of rotation in 3 IDB techniques. Conclusions: We can say that all 3 IDB techniques had a very high bracket transfer accuracy. Out of the 3 IDB techniques VF was the most accurate, whereas PVS was the least accurate technique. The selection of technique should be based on tray cost and fabrication time.

The Influence of Using Different Types of Scan Bodies on the Transfer Accuracy of Implant Position: An In Vitro Study

2021 ◽  
Vol 34 (2) ◽  
pp. 254-260
Author(s):  
Alexander Schmidt ◽  
Jan-Wilhelm Billig ◽  
Maximiliane Schlenz ◽  
Bernd Wöstmann
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Implant Position ◽  
Different Types ◽  
Transfer Accuracy

scholarly journals Assessment of shear bond strength of brackets bonded by direct and indirect techniques: an in vitro study

2012 ◽  
Vol 17 (4) ◽  
pp. 1-7 ◽  
Author(s):  
Roberto Hideo Shimizu ◽  
Karlos Giovani Grando ◽  
Isabela Almeida Shimizu ◽  
Augusto Ricardo Andriguetto ◽  
Ana Cláudia Moreira Melo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Vitro Study ◽  
Group Iii ◽  
Indirect Bonding ◽  
Group I ◽  
Group Ii

OBJECTIVE: This in vitro study was designed to evaluate the shear bond strength (SBS) of orthodontic metal brackets bonded by direct and indirect techniques. METHODS: Thirty healthy human maxillary premolar teeth were used. The teeth were divided into three groups of 10 teeth each: Group I - indirect bonding with SondhiTM Rapid-Set system (3M/Unitek), Group II - indirect bonding with TransbondTM XT adhesive system (3M/Unitek) and Group III - direct bonding with TransbondTM XT adhesive system (3M/Unitek). After bonding and obtaining the specimens for the study, the specimens were subjected to SBS testing in a universal testing machine (Emic, model DL-500). The Kolmogorov-Smirnov test was applied to ascertain that the data had a normal distribution and the Bartlett test to check whether there was homogeneity of variance. One-factor analysis of variance was performed and, subsequently, Tukey's test for paired means. A 5% significance level was adopted. RESULTS: The results of Group I were 67.6 (N) and 5.9 (MPa); Group II, 68.9 (N) and 6.1 (MPa) and Group III (control), 92.5 (N) and 8.1 (MPa). CONCLUSION: It can therefore be concluded that the means for Group III were significantly higher compared with Groups I and II in both Newton (N) and Megapascal (MPa) values. The means attained by the indirect bonding technique used in Groups I and II, however, exhibited no statistically significant differences.

scholarly journals Bracket transfer accuracy with two different three-dimensional printed transfer trays vs silicone transfer trays

2022 ◽  
Author(s):  
Lea Hoffmann ◽  
Hisham Sabbagh ◽  
Andera Wichelhaus ◽  
Andreas Kessler
Keyword(s):  
Three Dimensional ◽  
Processing System ◽  
Similar Distribution ◽  
Digital Light Processing ◽  
Directional Bias ◽  
Indirect Bonding ◽  
Significant Difference ◽  
Transfer Tray ◽  
Transfer Accuracy ◽  
Bracket Positioning

ABSTRACT Objectives To compare the transfer accuracy of two different three-dimensional printed trays (Dreve FotoDent ITB [Dreve Dentamid, Unna, Germany] and NextDent Ortho ITB [NextDent, Soesterberg, the Netherlands]) to polyvinyl siloxane (PVS) trays for indirect bonding. Materials and Methods A total of 10 dental models were constructed for each investigated material. Virtual bracket placement was performed on a scanned dental model using OnyxCeph (OnyxCeph 3D Lab, Chemnitz, Germany). Three-dimensional printed transfer trays using a digital light processing system three-dimensional printer and silicone transfer trays were produced. Bracket positions were scanned after the indirect bonding procedure. Linear and angular transfer errors were measured. Significant differences between mean transfer errors and frequency of clinically acceptable errors (<0.25 mm/1°) were analyzed using the Kruskal–Wallis and χ2 tests, respectively. Results All trays showed comparable accuracy of bracket placement. NextDent exhibited a significantly higher frequency of rotational error within the limit of 1° (P = .01) compared with the PVS tray. Although PVS showed significant differences between the tooth groups in all linear dimensions, Dreve exhibited a significant difference in the buccolingual direction only. All groups showed a similar distribution of directional bias. Conclusions Three-dimensional printed trays achieved comparable results with the PVS trays in terms of bracket positioning accuracy. NextDent appears to be inferior compared with PVS regarding the frequency of clinically acceptable errors, whereas Dreve was found to be equal. The influence of tooth groups on the accuracy of bracket positioning may be reduced by using an appropriate three-dimensional printed transfer tray (Dreve).

scholarly journals Bonding Interface and Repairability of 3D-Printed Intraoral Splints: Shear Bond Strength to Current Polymers, with and without Ageing

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3935
Author(s):  
Ebru Kuscu ◽  
Andrea Klink ◽  
Sebastian Spintzyk ◽  
Pablo Kraemer Fernandez ◽  
Fabian Huettig
Keyword(s):  
Bond Strength ◽  
Gold Standard ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Digital Light Processing ◽  
Bonded Repair ◽  
Wet Storage ◽  
Repair Materials ◽  
3D Printed

This in-vitro study investigates the bonding interfaces reached by the conditioning of a splint material additively manufactured by digital light processing (AM base) as well as the shear bond strength (SBS) of resins bonded to these surfaces (repair material). Therefore, the AM base was either stored in dry for 12 h or wet environment for 14 days to simulate ageing by intraoral wear. The dry and wet group was bonded after physical and/or chemical conditioning to cylinders made from polymethylmethacrylate or four novel polymers allowing splint modifications. Blasted and methylmethacrylate (MMA)-conditioned Polymethylmethacrylate (PMMA) bonded to PMMA acted as the gold standard. The surface profiles revealed highest differences of Ra towards the gold standard in AM base conditioned with other than MMA after sandblasting. The adhesively bonded repair materials of the wet AM base were further aged in wet environment for 14 days. The SBS of the gold standard (25.2 MPa and 25.6 MPa) was only reached by PMMA bonded to blasted and MMA-conditioned AM base after dry (22.7 MPa) and non-conditioned after wet storage (23 MPa). Four repair materials failed to reach the threshold of 5 MPa after dry storage and three after wet storage, respectively. Non-conditioned AM base revealed the highest risk for adhesive fractures when using other resins than PMMA.

scholarly journals Transfer accuracy of vinyl polysiloxane trays for indirect bonding

2015 ◽  
Vol 86 (3) ◽  
pp. 468-474 ◽  
Author(s):  
Thorsten Grünheid ◽  
Michael S. Lee ◽  
Brent E. Larson
Keyword(s):  
Positional Accuracy ◽  
Directional Bias ◽  
Positioning Errors ◽  
Indirect Bonding ◽  
Scan Data ◽  
Bonding Method ◽  
Bracket Position ◽  
Dental Cast ◽  
Transfer Accuracy ◽  
Bracket Positioning

ABSTRACT Objective:  To elicit the magnitude, directional bias, and frequency of bracket positioning errors caused by the transfer of brackets from a dental cast to the patient’s dentition in a clinical setting. Materials and Methods:  A total of 136 brackets were evaluated. The brackets were placed on dental casts and scanned using cone beam computed tomography (CBCT) to capture 3-D positioning data. The brackets were then transferred to the patient’s dentition with an indirect bonding method using vinyl polysiloxane (VPS) trays and later scanned using CBCT to capture the final bracket positioning on the teeth. Virtual models were constructed from the two sets of scan data and digitally superimposed utilizing best-fit, surface-based registration. Individual bracket positioning differences were quantified using customized software. One-tailed t tests were used to determine whether bracket positioning was within limits of 0.5 mm in the mesiodistal, buccolingual, and vertical dimensions, and 2° for torque, tip, and rotation. Results:  Individual bracket positioning differences were not statistically significant, indicating, in general, final bracket positions within the selected limits. Transfer accuracy was lowest for torque (80.15%) and highest for mesiodistal and buccolingual bracket placement (both 98.53%). There was a modest directional bias toward the buccal and gingival. Conclusion:  Indirect bonding using VPS trays transfers the planned bracket position from the dental cast to the patient’s dentition with generally high positional accuracy.

scholarly journals Indirect versus Direct Bonding—A Shear Bond Strength Comparison: An in vitro Study

2011 ◽  
Vol 12 (4) ◽  
pp. 232-238 ◽  
Author(s):  
Vinaya S Pai ◽  
S Nandini ◽  
M Swetha ◽  
N Sanjay
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Vitro Study ◽  
Tooth Surface ◽  
Indirect Bonding ◽  
Significant Difference ◽  
Bonding Technique

ABSTRACT Aim The process of bonding orthodontic appliances to the enamel surface of the teeth has come to the forefront as a major improvement in bonding techniques. The purpose of this study is to compare the shear bond strength of stainless steel orthodontic brackets bonded using conventional direct bonding and indirect bonding as described by Thomas. Materials and methods Forty sound human premolars were divided into two groups of 20 each. Group I samples were bonded directly on the tooth surface using concise two paste adhesive system after etching and drying. Group II samples were bonded indirectly on the tooth surface according to Thomas indirect bonding technique using concise two paste adhesive system. The stored specimen was tested for shear bond strength in an Instron universal testing machine at a crosshead speed of 0.5 mm/minute. Data obtained were subjected to statistical analysis. Results The results showed that there was no statistically significant difference in the shear bond strength between direct and indirect bonding techniques. Chi-square test showed that there were significant differences among the adhesive remnant index scores between direct and indirect bonding groups. Conclusion In vitro shear bond strength comparison between direct and indirect-bonded attachments showed no significant difference between the two groups. Bond strength obtained with Thomas indirect bonding technique was comparable with direct bonding technique. Clinical significance Thomas indirect bonding technique can be used for bonding of the posterior teeth, where the risk of moisture contamination is high during bonding. How to cite this article Swetha M, Pai VS, Sanjay N, Nandini S. Indirect versus Direct Bonding—A Shear Bond Strength Comparison: An in vitro Study. J Contemp Dent Pract 2011; 12(4):232-238.

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