scholarly journals Dimensional accuracy of thermoplastic impression material adaptol. Part 2. Comparison with other impression materials by computer simulation.

1988 ◽  
Vol 32 (4) ◽  
pp. 860-863
Author(s):  
Goro Nishigawa ◽  
Kiwamu Ando ◽  
Masaki Inoue ◽  
Toru Ueyama ◽  
Kazuhiko Ogata ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Dimensional Accuracy ◽  
Impression Material ◽  
Impression Materials

scholarly journals Evaluation and Comparison of Dimensional Accuracy of Newly Introduced Elastomeric Impression Material using 3D Laser Scanners: An in vitro Study

2013 ◽  
Vol 14 (2) ◽  
pp. 265-268 ◽  
Author(s):  
Naveen S Yadav ◽  
Teerthesh Jain ◽  
Amrita Pandita ◽  
SMA Feroz ◽  
Pradeep LNU ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Laser Scanner ◽  
In Vitro Study ◽  
Dimensional Accuracy ◽  
Time Intervals ◽  
Impression Material ◽  
Impression Materials ◽  
Laser Scanners ◽  
Master Model

ABSTRACT Aim Aim of the present study was to comparatively evaluate dimensional accuracy of newely introduced elastomeric impression material after repeated pours at different time intervals. Materials and methods In the present study a total of 20 (10 + 10) impressions of master model were made from vinyl polyether silicone and vinyl polysiloxane impression material. Each impression was repeatedly poured at 1, 24 hours and 14 days. Therefore, a total of 60 casts were obtained. Casts obtained were scanned with three-dimensional (3D) laser scanner and measurements were done. Results Vinyl polyether silicone produced overall undersized dies, with greatest change being 0.14% only after 14 days. Vinyl polysiloxane produced smaller dies after 1 and 24 hours and larger dies after 14 days, differing from master model by only 0.07% for the smallest die and to 0.02% for the largest die. Conclusion All the deviations measured from the master model with both the impression materials were within a clinically acceptable range. Clinical significance In a typical fixed prosthodontic treatment accuracy of prosthesis is critical as it determines the success, failure and the prognosis of treatment including abutments. This is mainly dependent upon fit of prosthesis which in turn is dependent on dimensional accuracy of dies, poured from elastomeric impressions. How to cite this article Pandita A, Jain T, Yadav NS, Feroz SMA, Pradeep, Diwedi A. Evaluation and Comparison of Dimensional Accuracy of Newly Introduced Elastomeric Impression Material using 3D Laser Scanners: An in vitro Study. J Contemp Dent Pract 2013;14(2):265-268.

scholarly journals A Comparative study of Different Impression Materials and Techniques of Dental Implant at The Second Stage of Procedure

2019 ◽  
Vol 4 (2) ◽  
pp. 90-93
Author(s):  
Hussameldien Hussien ◽  
◽  
Natashekara Mallesh ◽  
Keyword(s):  
Comparative Study ◽  
Dental Implants ◽  
Dental Implant ◽  
Dimensional Accuracy ◽  
Conclusive Evidence ◽  
Impression Material ◽  
Second Stage ◽  
Impression Materials ◽  
Significant Difference

Background of the study: Dental implants are one of the most sought-after choice of treatment for restoration and rehabilitation of missing teeth. However, the accuracy of the removable or fixed superstructures over the dental implants is influenced for a major proportion by the impression techniques and materials. This paper discusses the comparison of the accuracy of different impression materials and techniques used in the second stage of the dental implant treatment in vivo. Objective: The objective of the paper is to study the comparison of the accuracy of different impression materials and techniques used in the second stage of the dental implant’s treatment in vivo. Search methodology: Electronically key searched in scientific literature databases. Selection criteria: Based on the set inclusion and exclusion criteria such as studies conducted in partial edentulous arches, in the age group of 30 to 55 years. Data collection and analysis: A total of 248 literatures were found to be relevant to the framed topic and were scrutinised based on the dejected criteria and 18 kinds of literature obtained were taken into consideration. Main Result: Among the different impression materials taken into the comparative study, it was observed that polyvinyl siloxane exhibited a dimensional accuracy slightly greater than polyether. However, light body putty exhibited greater accuracy than medium body putty. Various impression techniques were compared to evaluate the dimensional accuracy of the impression. It was observed that the open tray technique and splinted impression technique produced a more dimensionally stable impression than the other techniques. Authors Conclusion: this study to assess the accuracy of various impression material and methods has concluded that while impression techniques influence the accuracy of the impression, the impression materials namely the Polyvinyl siloxane and polyether exhibit no significant difference with a slight preference to the polyvinyl siloxane. Hence the choice of impression material is at the discretion of the dentist performing the treatment and also this area requires further studies to establish conclusive evidence.

scholarly journals A Comparative Study on Accuracy and Reproducibility of Alginate and Addition Reaction Silicone as an Impression Materials.

2014 ◽  
Vol 3 (2) ◽  
pp. 28-33
Author(s):  
Shakila Fatema ◽  
Sheikh Md Shahriar Quader ◽  
Mohammad Shamsuzzaman ◽  
Mirza Md Arifur Rahman ◽  
Nasima Khan
Keyword(s):  
Addition Reaction ◽  
In Vitro Study ◽  
Dimensional Accuracy ◽  
Horizontal Line ◽  
Impression Material ◽  
Dimensional Changes ◽  
Impression Materials ◽  
Study Results ◽  
Surface Detail

Background: To achieve accuracy and exact reproduction of prosthesis, choosing a perfect impression material is essential. Especially to make the prosthesis as accurately as possible, impression material should possess some essential properties, like; minimum dimensional changes, good flow ability and easy removal. Purpose: The aim of this study was to evaluate the accuracy and surface detail reproduction of Alginate and Addition Reaction Silicone as an impression materials. Method: This is an experimental in vitro study. In this study Impression by Alginate and Addition Reaction Silicone were made using a round stainless steel test block with three horizontal lines and two vertical lines. The horizontal lines were used for evaluating the surface detail reproduction, and vertical lines were provided for the dimensional accuracy. For dimensional accuracy the length of the middle horizontal line in between vertical lines and the distance between the top and bottom horizontal line was measured using travelling microscope. And for surface detail reproduction three horizontal line of one segment were observed under stereomicroscope. Result: According to study results Addition Reaction Silicone is better than Alginate regarding quality of impression. Conclusion: In comparison to Alginate, Addition Reaction Silicone might have better performance about accuracy and surface detail reproduction. DOI: http://dx.doi.org/10.3329/updcj.v3i2.17996 Update Dent. Coll. j: 2013; 3 (2): 28-33

scholarly journals Dimensional Accuracy of Multiple Pour Cast from Different Elastomer Impression Techniques

2016 ◽  
Vol 6 (3) ◽  
pp. 51-56
Author(s):  
Satheesh B Haralur ◽  
Majed S Toman ◽  
Abdullah A Al-Shahrani ◽  
Abdullah A Al-Qarni
Keyword(s):  
Dimensional Accuracy ◽  
Dental Practice ◽  
Variance Test ◽  
Impression Material ◽  
Significance Level ◽  
Type Iv ◽  
Impression Materials ◽  
Cast Model ◽  
One Step ◽  
Step Type

ABSTRACT Context The elastomeric impression material is the most widely used impression material in contemporary dental practice; their accuracy is critical for the outcome of indirect restorations. The accurate duplicate cast obtained from single impression reduces the professional clinical time, patient inconvenience, and extra material cost. Aim To compare the accuracy of the cast obtained from various impression methods utilizing elastomer impression materials. Materials and methods The stainless steel working cast model assembly consisting of two abutments and one pontic area was fabricated. Two sets of six each custom aluminum trays were fabricated, with 5 mm spacer and 2 mm space. The impression methods evaluated in the study were additional silicone putty reline (two step), heavy-light body (one step), monophase (one step), and polyether (one step). Type IV gypsum casts were poured at intervals of 1, 12, 24, and 48 hours. The resultant cast was measured with a traveling microscope for comparative dimensional accuracy. The data obtained were subjected to analysis of variance test at significance level <0.05. Results The die obtained from putty reline two-step impression techniques had the percentage of variation for the height -0.36 to -0.97% with 0.40 to 0.90% increase in diameter. One-step heavy-light body impression dies recorded the increased width by 0.50 to 0.80% and height reduced by - 0.73 to -1.21%. The resultant dies from additional silicone monophase impressions had a percentage of variation for width 1.20% and height by-1.34%. The similar value for width and height for polyether was -1.46% and -1.30% respectively. Conclusion Putty reline technique dies had better dimensional accuracy after repeated pour followed by dies from heavy-light body additional silicone impression. Key message The multiple pour cast from putty reline elastomeric impressions is clinically acceptable, while cast from polyether was smaller in dimension. How to cite this article Haralur SB, Toman MS, Al-Shahrani AA, Al-Qarni AA. Dimensional Accuracy of Multiple Pour Cast from Different Elastomer Impression Techniques. Int J Prosthodont Restor Dent 2016;6(3):51-56.

Dimensional Accuracy of Working Dies Fabricated by Different Impression Materials and Techniques: 3D Digital Assessment

2021 ◽  
Vol 11 (1) ◽  
pp. 106-111
Author(s):  
Mai Soliman ◽  
Alhanoof Aldegheishem ◽  
Norah Alsubaie ◽  
Razan Alshamrani ◽  
Elzahraa Eldwakhly
Keyword(s):  
Dimensional Accuracy ◽  
Molar Tooth ◽  
3D Scanner ◽  
Impression Material ◽  
Four Dimensions ◽  
Digital Assessment ◽  
Impression Materials ◽  
Significant Difference ◽  
Gingival Dimensions ◽  
One Step

Accuracy of dental impression plays a significant role in the success of definitive restorations. This study aimed to compare the dimensional accuracy of working dies fabricated using two different impression materials and techniques. Forty working dies fabricated from 40 impressions of preprepared mandibular first molar tooth replica stabilized in a jaw model to receive full coverage crown. Two different Polyvinyl siloxane (PVS) impression materials were used; Aquasil and Virtual. Two different impression techniques were used with each type of impression material; One-step and two-step. The working dies dimensional accuracy was measured in four dimensions and compared with that of the preprepared molar tooth replica using a digital caliper and 3D scanner. Based on a 3D scanner, there were a significant difference of dies fabricated by the two tested impression materials using the two-step impression technique in Mesiodistal-Gingival dimension (IIA and IIB) groups compared to the preprepared tooth replica with an average 0.370 μm (P < .005). A significant difference was observed of the dies fabricated by the two tested impression techniques using virtual impression. material in Mesiodistal Occlusal dimensions with an average 0.135 μm (P < .03), and in Mesiodistal-Gingival dimensions with an average 0.490 μm (P < .001) and Buccolingual-Gingival dimensions with an average 0.143 μm (P < .005) using Aquasil impression material compared to the preprepared molar tooth replica. Both impression materials (Aquasil and Virtual) and techniques (One-step and Two-step) used in this study produced working dies with clinically accepted dimensional accuracy.

Effect of Intermixing Brands on the Dimensional Accuracy of Master Cast using Putty-wash Impression Technique

2016 ◽  
Vol 17 (9) ◽  
pp. 734-739
Author(s):  
Mohammed E Sayed ◽  
Bandar MA Al-Makramani ◽  
Fuad A Al-Sanabani ◽  
Mohamed S Mohamed
Keyword(s):  
Stainless Steel ◽  
Dimensional Accuracy ◽  
Mean Value ◽  
Two Dimensions ◽  
Impression Material ◽  
Impression Technique ◽  
Impression Materials ◽  
Significant Difference ◽  
The Mean ◽  
Post Hoc

ABSTRACT Aim The aim of this study was to evaluate the effect of intermixing brands of addition silicone impression materials on the dimensional accuracy of stone models using two-step putty-wash technique. Materials and methods Two common brands of addition silicone impression material (Express and Aquasil) were used in this study. A total of 40 impressions of a stainless steel model simulating a three-unit bridge were made, 10 impressions for each group. Accuracy was assessed by measuring two dimensions (inter-abutment and intra-abutment) on stone models obtained from impressions of the stainless steel model. Each sample was measured thrice and the mean value was calculated. The data were analyzed using analysis of variance (ANOVA) and Scheffe's post hoc test. Results The results indicated that each of the inter-abutment and intra-abutment dimensions of the stone models was significantly higher than those for the stainless steel model (p < 0.001). However, there was no statistically significant difference in each of the inter-abutment and intra-abutment dimensions of the stone models among the four tested groups (p < 0.05). Conclusion The results obtained were statistically analyzed and the values of the inter-abutment and intra-abutment dimensions were all within the clinically acceptable range. Clinical significance Intermixing brands of additional silicone impression materials evaluated in this study did not affect the dimensional accuracy of obtained stone casts. This will help to minimize the wastage of materials due to lack of either light or putty consistency of the same brand of additional silicone impression material. How to cite this article Sayed ME, Al-Makramani BMA, Al-Sanabani FA, Mohamed MS. Effect of Intermixing Brands on the Dimensional Accuracy of Master Cast using Putty-wash Impression Technique. J Contemp Dent Pract 2016;17(9):734-739.

scholarly journals In Vitro Comparative Evaluation of Different Types of Impression Trays and Impression Materials on the Accuracy of Open Tray Implant Impressions: A Pilot Study

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Sonam Gupta ◽  
Aparna Ichalangod Narayan ◽  
Dhanasekar Balakrishnan
Keyword(s):  
Reference Model ◽  
Coordinate Measuring Machine ◽  
Dimensional Accuracy ◽  
Impression Material ◽  
Impression Materials ◽  
Significant Difference ◽  
Different Types ◽  
Measuring Machine ◽  
The Difference

Purpose. For a precise fit of multiple implant framework, having an accurate definitive cast is imperative. The present study evaluated dimensional accuracy of master casts obtained using different impression trays and materials with open tray impression technique.Materials and Methods. A machined aluminum reference model with four parallel implant analogues was fabricated. Forty implant level impressions were made. Eight groups (n=5) were tested using impression materials (polyether and vinylsiloxanether) and four types of impression trays, two being custom (self-cure acrylic and light cure acrylic) and two being stock (plastic and metal). The interimplant distances were measured on master casts using a coordinate measuring machine. The collected data was compared with a standard reference model and was statistically analyzed using two-way ANOVA.Results. Statistically significant difference (p<0.05) was found between the two impression materials. However, the difference seen was small (36 μm) irrespective of the tray type used. No significant difference (p>0.05) was observed between varied stock and custom trays.Conclusions. The polyether impression material proved to be more accurate than vinylsiloxanether impression material. The rigid nonperforated stock trays, both plastic and metal, could be an alternative for custom trays for multi-implant impressions when used with medium viscosity impression materials.

scholarly journals A Promising Potential of Brown Algae Sargassum polycystum as Irreversible Hydrocolloid Impression Material

Marine Drugs ◽  
2022 ◽  
Vol 20 (1) ◽  
pp. 55
Author(s):  
Nurlindah Hamrun ◽  
Bahruddin Talib ◽  
Muhammad Ruslin ◽  
Hasminar Pangeran ◽  
Mochammad Hatta ◽  
...  
Keyword(s):  
Dimensional Stability ◽  
Brown Algae ◽  
Dimensional Accuracy ◽  
Impression Material ◽  
Sargassum Polycystum ◽  
Impression Materials ◽  
Measurement Results ◽  
Irreversible Hydrocolloid ◽  
Dental Cast ◽  
Digital Caliper

This study aimed to investigate the potential use of brown algae Sargassum polycystum as irreversible hydrocolloid (alginate) impression material. Potassium alginate extracted from Sargassum polycystum was prepared in three different compositions (14%, 15%, and 16%) and mixed with other standard components to form an alginate impression material. Prior to that, the purity of potassium alginate was quantified with Fourier Transform Infrared Spectroscopy (FTIR) analysis. As a control material, the alginate impression material from a commercially available product was used. All alginate impression materials were then applied to a die stone model. Dimensional accuracy was measured by calculating the mesiodistal width of incisors in the generated dental cast using a digital caliper 0.01 accuracy (five replications). In addition, to evaluate the dimensional stability, the impression results were poured at four different periods (immediately, 5 min, 10 min, and 15 min). An independent t-test was performed to compare the measurement results with p < 0.05 considered significant. Analytical results confirm that the impression material containing 15% potassium alginate gives the best dimensional accuracy similar to control (p > 0.05). Meanwhile, the optimal dimensional stability was produced in the impression material containing 16% potassium alginate. Our study suggested that brown algae Sargassum polycystum has a promising potential to be used as an alginate impression material in clinical application.

scholarly journals Effect of different impression techniques and elastomeric impression materials on the dimensional accuracy of partially edentulous mandibular arch

2017 ◽  
Vol 15 (3) ◽  
pp. 238
Author(s):  
Rafael Pino Vitti ◽  
Adriano Relvas Barreira de Oliveira ◽  
Mário Alexandre Coelho Sinhoreti
Keyword(s):  
Dimensional Accuracy ◽  
Impression Material ◽  
Mandibular Arch ◽  
Normality Test ◽  
Measuring Microscope ◽  
Impression Technique ◽  
Impression Materials ◽  
Significant Difference ◽  
Kolmogorov Smirnov

Aim: Evaluate the dimensional accuracy of stone casts of a partially edentulous mandibular arch made by two impression techniques (1-step putty/light-body and 2-step putty/light-body) using addition and condensation silicones. Methods: A partially edentulous steel stainless cast with four markings on teeth 33, 37, 43, and 47 was used to obtain the impressions. The transverse (33-43 and 37-47) and anteroposterior (33-37 and 43-47) distances were measured by measuring microscope (30x magnification; 0.5μm accuracy). For the 1-step putty/light-body technique, both viscosities of the impression materials were handled together. For the 2-step putty/light-body technique, the impression materials of different viscosities were handled separately and a polypropylene spacer (2 mm thick) was used to create a relief. The same distances were measured om stone casts (n = 5). The values were submitted to normality test (Kolmogorov-Smirnov) and analyzed statistically by three-way ANOVA and Tukey’s (5%). Results: All distances showed shrinkage (negative linear changes). The addition silicones showed better accuracy than condensation silicones (p<0.05) and no significant difference was found between the impression techniques (p>0.05). The edentulous zone (43-47) presented worst dimensional accuracy results. Conclusions: The accuracy of the castsis more related to the impression material than impression technique.

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