Accuracy of the One-Stage and Two-Stage Impression Techniques: A Comparative Analysis

Jamshidy, Ladan; Mozaffari, Hamid Reza; Faraji, Payam; Sharifi, Roohollah

doi:10.1155/2016/7256496

Cited by 10 publications

(10 citation statements)

References 24 publications

(25 reference statements)

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“…Similarly, another in vitro study evaluated the framework marginal fit (nondestructive technique) and showed that the two-stage impression technique was the most accurate method for VPS impression taking [ 28 , 29 ].…”

Section: Discussionmentioning

confidence: 99%

“…A wash-bulk thickness of up to 2 mm seems to be an important factor for fabricating an accurate stone dies working model, using VPS impression materials [ 18 , 27 ]. However, there is little information regarding the association between these putty-wash impression techniques and restorations’ marginal fit accuracy [ 28 , 29 ]. The importance and uniqueness of the present in vivo study is that most of the previously reported data originated from in vitro studies.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Vinyl Polysiloxane Impression Techniques on Marginal Fit of Metal Frameworks for Fixed Partial Dentures

et al. 2020

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Impression technique is one of the factors affecting restoration fit accuracy, which is a major aspect influencing its survival. The purpose of this study is to compare, in vivo, the effect of two commonly used Vinyl Polysiloxane (VPS) impression techniques on the metal framework fitting of fixed partial dentures. Ninety-two consecutive patients, diagnosed as partially edentulous, treated by fixed partial denture restorations, participated in the study. Group 1-impressions (n = 44) were subjected to the 1-step technique, while group 2 impressions (n = 48) were subjected the 2-step technique. Three accuracy assessment common methods: probe, tactile sense and radiographic test, were used to validate the clinical fit of the metal framework. Misfit was defined as even one test failure. Twenty-one (22.8%) out of 92 metal frameworks exhibited metal frameworks misfit, whereas the other 71 (77.2%) were found to be accurate. Group 1 presented significantly (p = 0.04) more metal frameworks misfit, 14/44 (31.8%) vs. 7/48 (14.6%). Restoration location (maxilla vs. mandible) had no statistically significant impact on the results (p = 0.461). The use of the VPS putty/wash 2-step impression technique is recommended to improve the clinical fit of fixed partial denture restorations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Vinyl Polysiloxane Impression Techniques on Marginal Fit of Metal Frameworks for Fixed Partial Dentures

et al. 2020

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“…2,3,4 Pencetakan termasuk proses memindahkan keadaan jaringan lunak dan keras pasien ke laboratorium dan bagian terpenting dalam proses permbuatan gigi tiruan cekat. 5 Tujuan dari pencetakan adalah menciptakan hasil cetakan yang bebas dari cacat pada hasil negatif dari preparasi gigi yang akan memengaruhi akurasi model kerja. Bagian ini penting untuk menghasilkan gigi tiruan memiliki bentuk serta fungsi yang baik.…”

Section: Pendahuluanunclassified

<p>Perbedaan teknik pencetakan two step dengan spacer coping metal dan polyethylene sheet terhadap cacat permukaan dan akurasi dimensi model kerja gigi tiruan cekat</p><p>Difference between two step printing techniques with spacer coping metal and polyethylene sheet to surface defects and dimensional accuracy of fixed denture working models</p>

Guntara

Ritonga²

2019

Padjadjaran J Dent Res Students

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Pendahuluan: Pencetakan merupakan hasil dari cetakan gigi dan struktur jaringan pendukung. Untuk mendapatkan hasil cetakan yang baik, maka diperlukan teknik cetakan yang mampu menghasilkan permukaan cetakan yang halus dan akurasi dimensi yang tepat sehingga meningkatkan keberhasilan pembuatan gigi tiruan cekat. Salah satu teknik pencetakan untuk mendapatkan hasil cetakan yang baik adalah teknik two step dengan spacer. Tujuan penelitian ini untuk mengetahui cacat permukaan dan perbedaan nilai akurasi dimensi model kerja gigi tiruan cekat pada pencetakan two–step dengan spacer coping metal 1 mm, coping metal 2 mm, dan polyethylene sheet 0,5 mm. Metode: Sampel pada penelitian ini diperoleh dari pencetakan model induk berdasarkan spesifikasi ANSI/ADA No.19. Sampel tersebut diperlukan untuk melihat cacat permukaan dan perhitungan akurasi. Jumlah sampel yang akan digunakan untuk diberi perlakuan sebanyak 8 sampel setiap kelompok yaitu putty/wash two step unspacer (kelompok A), putty/wash two step spacer coping metal 1 mm (kelompok B), putty/wash two step spacer coping metal 2 mm (kelompok C), putty/wash two step spacer polyethylene sheet 0,5 mm (kelompok D). Hasil: Tidak ada perbedaan yang signifikan pada cacat permukaan cetakan dan ada perbedaan yang signifikan pada akurasi dimensi model kerja gigi tiruan cekat pada hasil pencetakan two step dengan spacer coping metal 1 mm, coping metal 2 mm, dan polyethylene sheet 0,5 mm. Simpulan: Bila dilihat dari cacat permukaan maka hasil pencetakan two step dengan spacer polyethylene sheet 0,5 mm yang paling baik digunakan. Bila dilihat dari akurasi dimensi maka pencetakan two step dengan spacer coping metal 2 mm yang paling baik digunakan.Kata kunci: Pencetakan, two – step, spacer, cacat, akurasi.ABSTRACTIntroduction: Imprint is the result of teeth and supporting tissue structures cast. To get a good impression, we need an imprint technique that can produce a smooth imprint surface and precise dimensional accuracy to increase the success of fixed denture manufacturing. One of the imprint technique to get a good impression is the two-step technique with a spacer. The purpose of this study was to determine surface defects and differences in dimensional accuracy value of fixed denture working models fabricated with two-step impression with 1 mm metal coping spacer, 2 mm metal coping sheet, and 0.5 mm polyethylene sheet. Methods: The sample in this study was obtained from the master model cast based on ANSI / ADA No.19 specifications. These samples were needed for surface defects observation and accuracy calculation. The number of samples that will be used for treatment was 8 samples per group, namely putty / wash two-step unspacer (group A), putty / wash two-step 1 mm metal coping spacer (group B), putty / wash two-step 2 mm metal coping spacer (group C), putty / wash two-step 0.5 mm polyethylene sheet spacer (group D). Results: There was no significant difference in the surface defects, and there were significant differences in dimensional accuracy of fixed denture working models fabricated with two-step imprint technique with 1 mm metal coping spacer, 2 mm metal coping spacer, and 0.5 mm polyethylene sheet. Conclusion: Assessed from the surface defects, two-step imprint technique with 0.5 mm polyethylene sheet is the best imprint technique. While from dimensional accuracy, two-step imprint technique with 2 mm metal coping spacer is the best imprint technique.Keywords: Imprint, two-step, spacer, defect, accuracy.

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“…The impression phase is predominantly controlled by the clinician and may influence the restoration fit accuracy [8][9][10][11][12]. The impression accuracy is mainly subjected to the effect of proper handling of the impression materials [13][14][15][16][17][18][19] and impression techniques applied [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mixing and Impression Techniques Using Vinyl Polysiloxane (VPS) on the Accuracy of Fixed Partial Dentures

et al. 2021

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Two critical factors that influence the accuracy of an impression include the proper manipulation of the impression materials and the technique used to make the impression. The purpose of this study was to clinically evaluate the effect of different mixing techniques on the accuracy of vinyl polysiloxane (VPS) impressions by assessing metal framework fit of fixed partial restorations. The study included 92 consecutive patients diagnosed with partial edentulism and treated with fixed partial denture restorations. The mixing technique was one of the two following mixing methods: hand mixing technique (45 patients), with the putty material mixed according to the manufacturer’s instructions; or mechanical mixing technique (47 patients), with the putty material mixed by a Pentamix device. Under both mixing methods, vinyl polysiloxane was used as the impression material. Two impression techniques were randomly used by the operators (One/Two-stage putty –wash impression techniques). The accuracy of the metal framework restorations was tested clinically and radiologically, resulting in significant statistical difference (p = 0.04) between different mixing techniques. The mechanical mixing produced more accurate restorations (metal framework misfit only in 14.9% of patients vs. hand mixing 31.1%). Regarding the impression techniques, the two-stage impression technique was found to be significantly more accurate (p = 0.04), resulting in 14.6% ill-fitted metal frameworks vs. 31.8%, in the one-stage technique. It can be concluded that mechanical mixing yields more accurate impressions leading to more accurate restorations, especially when combined with two-stage impression technique.

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Accuracy of the One-Stage and Two-Stage Impression Techniques: A Comparative Analysis

Cited by 10 publications

References 24 publications

Influence of Vinyl Polysiloxane Impression Techniques on Marginal Fit of Metal Frameworks for Fixed Partial Dentures

Influence of Vinyl Polysiloxane Impression Techniques on Marginal Fit of Metal Frameworks for Fixed Partial Dentures

Effect of Mixing and Impression Techniques Using Vinyl Polysiloxane (VPS) on the Accuracy of Fixed Partial Dentures

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