Accuracy of new implant impression technique using dual arch tray and bite impression coping

Lee, Shin Eon; Yang, Scott; Lee, Cheol-Won; Lee, Wonsup; Lee, Su Young

doi:10.4047/jap.2018.10.4.265

Cited by 4 publications

(4 citation statements)

References 26 publications

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“…Recently, there have been many studies analysing the 3D deviations calculated by superimposing the 3D digital images to evaluate the dimensional accuracy 21,22 . The technique has also been introduced for 3D volumetric analysis to assess the alternation between pre‐ and post‐operative STL models 23,24 .…”

Section: Discussionmentioning

confidence: 99%

Comparative study of three composite materials in bonding attachments for clear aligners

Chen¹,

Qian²,

Qian³

et al. 2021

Orthod Craniofacial Res

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Objective The aim of this study was to assess the operation time, shear bond strength, placement accuracy and wear resistance of 3 composite materials (Filtek Z350XT, Filtek Z350XT Flowable and SonicFill) that were used to make attachments for clear aligners. Settings and sample population Laboratory of Stomatology of Shanghai Ninth People’s Hospital affiliated to Shanghai Jiao Tong University School of Medicine. A total of 129 human mandibular premolars were collected, 69 of which were assigned to 3 groups (A1, B1 and C1). The remaining 60 teeth were divided into 3 groups (A2, B2 and C2). Methods Z350XT composite resin was used in groups A1 and A2 to bond the attachments. Z350XT Flowable composite resin was used in groups B1 and B2. SonicFill composite resin was used in groups C1 and C2. The operation time, shear bond strength, the placement accuracy and wear volume loss of 3 composite materials were evaluated. Results The operation time of Z350XT Flowable and SonicFill was shorter than Z350XT (P < .05). The shear bond strength of SonicFill was higher than Z350XT and Z350XT Flowable (P < .05). The SEM showed that the bonding interface of Z350XT and SonicFill was compact. The 3D deviation and volumetric change in the 3D designed attachments and the attachments after actual bonding of Z350XT Flowable were greater than that of Z350XT and SonicFill (P < .05). The wear volume loss of SonicFill and Z350XT was less than that of Z350XT Flowable (P < .05). Conclusion SonicFill seems to represent a suitable material for producing attachments, which optimized the property combination.

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Section: Discussionmentioning

confidence: 99%

Comparative study of three composite materials in bonding attachments for clear aligners

Chen¹,

Qian²,

Qian³

et al. 2021

Orthod Craniofacial Res

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“…This could indicate a higher reproducibility of results with the open implant impression. The mean deviation of 43.6 µm was an acceptable difference between the master cast and stone cast and was procedurally unavoidable [ 18 , 19 ]. Assuming the same measured variables, our study did not confirm the claim that the nt-VAL-Jig would achieve better accuracy than the open-tray implant level impression.…”

Section: Discussionmentioning

confidence: 99%

“…Polyether and polyvinyl siloxane materials are most frequently used for implant impressions. Both materials show small inaccuracies in the transfer of the implant impression [ 18 , 19 ]. Due to expansion, the master cast can show altered dimensions compared to the oral situation [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Accuracy of a Mounting Fixture for Dental Implants for Implant Position Transfer and Open-Tray Implant Level Impression—An In Vitro Study

Becker,

Dirksen,

Runte

2023

Dentistry Journal

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The accuracy for the implant position transfer of a mounting fixture and a standardized open-tray implant level impression was compared. Ten aluminum master models with four implant analogs placed in different angulations were fabricated. By performing an open-tray implant level impression stone casts were produced. The master models and stone casts were scanned (comparison group one) using a laboratory scanner. Deviations in the scan body surface were determined in the form of mean (absolute) point distances and (signed) surface distances. The same procedure was performed with a screwed transfer and by fixing the posts of the mounting fixture (comparison group two). The mounting device was applied to each master model and scanned in a fixed and detached state (comparison group three). In a point comparison, the open-tray implant level impression showed mean deviations of 43.6 µm and a mounting fixture of 44.6 µm with no significant differences (p < 0.05). There were significant differences between groups two and three. The angulation of the implants had no effect on the accuracy. In a surface comparison, the open-tray implant level impression showed mean deviations of 36.0 µm and a mounting fixture of 2.0 µm (p > 0.05). Within the limits of this study, the mounting fixture transferred the implant position with the same accuracy as the open-tray implant level impression with respect to point deviations.

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“…7 Similar to previous research, this study showed that the distances measured on the original model could not be ideally transferred to the final cast, and that the spatial coordinates of the implants changed relative to each other when transferred to the cast. 10,23,24 The reason might be the movement of the metal copings when opening or closing the guiding rods or attaching the analog, 10,25 the dimensional changes of the gypsum, 26 the shrinkage of the acrylic resin when the copings were connected to each other, 10,25,26 changes in the impression material, 25 the depth of implant placement, 27 soft tissue adhesion (since it could modify the mucosal aspect around the implant), 28 the duration of the use of the dental stone, 29 the implant-abutment interface, 30 machining tolerance (0.6-136 μm), 20 or the operator's error, which is minimally 30 μm in the laboratory setting, but may increase in the oral environment. 31 Moreover, different methodologies can yield variable results.…”

Section: Discussionmentioning

confidence: 99%

Effect of dental implant angulation on the dimensional accuracy of master casts

Barjini¹,

Sayahpour²,

Jafari³

2021

Dent. Med. Probl.

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Background. Making accurate impressions of dental implants and transferring their three-dimensional (3D) position to master casts is critical for the passive fit of prosthetic frameworks.Objectives. This study aimed to assess the effect of dental implant angulation on the dimensional accuracy of master casts.Material and methods. An acrylic model with 2 external hexagonal implants was used in this in vitro experimental study. The impressions of the model were made in 42 positions, with different angulation of the 2 implants, ranging from +15° to −15°, by means of the open-tray and closed-tray impression techniques, using a polyvinyl siloxane impression material. The spatial coordinates of the implants were measured on the X, Y and Z axes. The dimensional accuracy of the impressions made at different positions (parallel, convergent and divergent) and different angulation of the implants were determined. The data was analyzed using the one-way analysis of variance (ANOVA), Student's t test and Tukey's test.Results. Casts with the lowest accuracy were obtained when the 2 implants were divergent by 25° (R = 1.1336). However, the position of the 2 implants had no significant effect on the dimensional accuracy of the master casts. The error rate was 0.4181 in the open-tray technique and 0.5095 in the closed-tray technique, with no significant difference between them (p > 0.05). The angulation of the 2 implants had a significant effect on the dimensional accuracy of the master casts (p = 0.0001). Conclusions.Considering the significant effect of implant angulation in the range from +15° to −15° relative to the longitudinal axis on the dimensional accuracy of master casts, further studies are required to reach a final conclusion in this respect.

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Accuracy of new implant impression technique using dual arch tray and bite impression coping

Cited by 4 publications

References 26 publications

Comparative study of three composite materials in bonding attachments for clear aligners

Comparative study of three composite materials in bonding attachments for clear aligners

Comparison of the Accuracy of a Mounting Fixture for Dental Implants for Implant Position Transfer and Open-Tray Implant Level Impression—An In Vitro Study

Effect of dental implant angulation on the dimensional accuracy of master casts

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