Three-dimensional accuracy of different impression techniques for dental implants
Background: Accurate impression making is an essential prerequisite for achieving a passive fit between the implant and the superstructure. The aim of this in vitro study was to compare the three-dimensional accuracy of open-tray and three closed-tray impression techniques. Materials and Methods: T...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2015-01-01
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| Series: | Dental Research Journal |
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| Online Access: | http://www.drjjournal.net/article.asp?issn=1735-3327;year=2015;volume=12;issue=5;spage=431;epage=437;aulast=Nakhaei |
| _version_ | 1811312278389129216 |
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| author | Mohammadreza Nakhaei Azam S Madani Azizollah Moraditalab Hamidreza Rajati Haghi |
| author_facet | Mohammadreza Nakhaei Azam S Madani Azizollah Moraditalab Hamidreza Rajati Haghi |
| author_sort | Mohammadreza Nakhaei |
| collection | DOAJ |
| description | Background: Accurate impression making is an essential prerequisite for achieving a passive fit between the implant and the superstructure. The aim of this in vitro study was to compare the three-dimensional accuracy of open-tray and three closed-tray impression techniques.
Materials and Methods: Three acrylic resin mandibular master models with four parallel implants were used: Biohorizons (BIO), Straumann tissue-level (STL), and Straumann bone-level (SBL). Forty-two putty/wash polyvinyl siloxane impressions of the models were made using open-tray and closed-tray techniques. Closed-tray impressions were made using snap-on (STL model), transfer coping (TC) (BIO model) and TC plus plastic cap (TC-Cap) (SBL model). The impressions were poured with type IV stone, and the positional accuracy of the implant analog heads in each dimension (x, y and z axes), and the linear displacement (ΔR) were evaluated using a coordinate measuring machine. Data were analyzed using ANOVA and post-hoc Tukey tests (α = 0.05).
Results: The ΔR values of the snap-on technique were significantly lower than those of TC and TC-Cap techniques (P < 0.001). No significant differences were found between closed and open impression techniques for STL in Δx, Δy, Δz and ΔR values (P = 0.444, P = 0.181, P = 0.835 and P = 0.911, respectively).
Conclusion: Considering the limitations of this study, the snap-on implant-level impression technique resulted in more three-dimensional accuracy than TC and TC-Cap, but it was similar to the open-tray technique. |
| first_indexed | 2024-04-13T10:33:26Z |
| format | Article |
| id | doaj.art-0e735daee7074b2085499316d8eeefe5 |
| institution | Directory Open Access Journal |
| issn | 1735-3327 2008-0255 |
| language | English |
| last_indexed | 2024-04-13T10:33:26Z |
| publishDate | 2015-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Dental Research Journal |
| spelling | doaj.art-0e735daee7074b2085499316d8eeefe52022-12-22T02:50:07ZengWolters Kluwer Medknow PublicationsDental Research Journal1735-33272008-02552015-01-0112543143710.4103/1735-3327.166190Three-dimensional accuracy of different impression techniques for dental implantsMohammadreza NakhaeiAzam S MadaniAzizollah MoraditalabHamidreza Rajati HaghiBackground: Accurate impression making is an essential prerequisite for achieving a passive fit between the implant and the superstructure. The aim of this in vitro study was to compare the three-dimensional accuracy of open-tray and three closed-tray impression techniques. Materials and Methods: Three acrylic resin mandibular master models with four parallel implants were used: Biohorizons (BIO), Straumann tissue-level (STL), and Straumann bone-level (SBL). Forty-two putty/wash polyvinyl siloxane impressions of the models were made using open-tray and closed-tray techniques. Closed-tray impressions were made using snap-on (STL model), transfer coping (TC) (BIO model) and TC plus plastic cap (TC-Cap) (SBL model). The impressions were poured with type IV stone, and the positional accuracy of the implant analog heads in each dimension (x, y and z axes), and the linear displacement (ΔR) were evaluated using a coordinate measuring machine. Data were analyzed using ANOVA and post-hoc Tukey tests (α = 0.05). Results: The ΔR values of the snap-on technique were significantly lower than those of TC and TC-Cap techniques (P < 0.001). No significant differences were found between closed and open impression techniques for STL in Δx, Δy, Δz and ΔR values (P = 0.444, P = 0.181, P = 0.835 and P = 0.911, respectively). Conclusion: Considering the limitations of this study, the snap-on implant-level impression technique resulted in more three-dimensional accuracy than TC and TC-Cap, but it was similar to the open-tray technique.http://www.drjjournal.net/article.asp?issn=1735-3327;year=2015;volume=12;issue=5;spage=431;epage=437;aulast=NakhaeiDental implantsdental impression materialsdental impression technique |
| spellingShingle | Mohammadreza Nakhaei Azam S Madani Azizollah Moraditalab Hamidreza Rajati Haghi Three-dimensional accuracy of different impression techniques for dental implants Dental Research Journal Dental implants dental impression materials dental impression technique |
| title | Three-dimensional accuracy of different impression techniques for dental implants |
| title_full | Three-dimensional accuracy of different impression techniques for dental implants |
| title_fullStr | Three-dimensional accuracy of different impression techniques for dental implants |
| title_full_unstemmed | Three-dimensional accuracy of different impression techniques for dental implants |
| title_short | Three-dimensional accuracy of different impression techniques for dental implants |
| title_sort | three dimensional accuracy of different impression techniques for dental implants |
| topic | Dental implants dental impression materials dental impression technique |
| url | http://www.drjjournal.net/article.asp?issn=1735-3327;year=2015;volume=12;issue=5;spage=431;epage=437;aulast=Nakhaei |
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