Facts About Express Penta Putty/ Vinyl Polysiloxane Precision Impression Materials European Field Evaluation Results May August 2004
Ultra Light Body Contents 1 Innovative VPS Impression Materials.................... Page 5 1.1. Express Penta Putty.............................. Page 6 1.2. Express......................... Page 8 2 In-Vitro Research.................................... Page 11 2.1. Insertion Resistance of Putty Silicones.............. Page 12 2.2. Tensile Strength and Contact Angle of VPS........... Page 17 3 European Field Evaluation Results.................... Page 21 3.1. European Field Evaluation Results................ Page 22 3.2. Impression Techniques, Materials, Indications........ Page 23 3.3. Assessment of the Tray Material................... Page 24 3.4. Assessment of the Light-bodied Wash Material........ Page 29 3.5. Assessment of the Result Quality................... Page 31 3.6. Assessment of the Complete System................ Page 34 4 Testimonials by the Study Participants.................. Page 39 5 Questions and Answers............................... Page 41
Introduction It is a central aim of research and development at 3M ESPE to assist dentists in every way with materials tailored to the dental practice, simple handling methods and a product range that takes into account of the fact that users preferences differ. Twenty years ago, Express was already setting the standard for precision impression taking in the dental practice with the world s first automatically mixable light-bodied wash material from a dispenser. With Express Penta Putty, the researchers at 3M ESPE now present the first genuine 3M ESPE VPS Putty Material specifically developed for automatic handling in the Pentamix 2 Automatic Mixing Unit. The scientific and technical challenge posed by this exciting project consisted of combining the valued characteristics of the familiar malleable VPS with a completely new type of handling. The putty is complemented by Express, whose innovative formulation offers both excellent hydrophilisation and high tensile strength. This is the major distinction between Express and conventional VPS light-bodied wash materials. This booklet focuses on the evaluation of a major user study, in which more than 220 dentists in ten European countries participated. Express Penta Putty and Express provide the perfect combination of convenience and precision impressions, thus generating a high level of acceptance amongst practitioners, as the study results demonstrate. The results of comparative in-vitro studies, which are also presented, are relevant to daily dental practice. In addition, important questions on the method of use are answered. Detailed indexes enable the reader to use the booklet as a practical reference work. Kind regards Dr. Joachim Zech 3
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Innovative VPS Impression Materials 1 5
1.1. Express Penta Putty 1 The putty material Express Penta Putty is the first genuine 3M ESPE VPS Putty specially developed for automatic mixing in the Pentamix 2 Mixing Unit from 3M ESPE. This innovative material is easy and clean to handle, permits dispensing of exactly the quantity required and offers the user all the benefits of a conventional putty material. Advantages of the material in use Quick, easy and clean to handle Homogeneous and void-free mixing at the press of a button Mixing quality reproducible every time Dispensing of exactly the quantity required Familiar putty consistency Can be moulded with your finger Good insertion resistance High ultimate hardness Easy to carve 6
1.1. Express Penta Putty Chemical background 1 The innovative formulation of Express Penta Putty, with reactive polysiloxanes and fillers, makes it easy to dispense and enables problem-free automatic mixing, in spite of its putty consistency. The special polymer combination also gives the material high ultimate hardness: the preliminary impression is quick and easy to carve, while, at the same time, the pressure required to press the light-bodied wash material perfectly into the sulcus is created in the preliminary impression. The highly reactive polymers contained in Express Penta Putty and Express also offer another important advantage for the two-step putty wash technique. The two-stage impression technique can also be carried out quickly because of the short working and setting times which is better for patient and dentist alike. New Penta Components The new Penta components are designed to suit the high viscosity of Express Penta Putty perfectly, offering maximum safety and reliability for Automatic mixing in the Pentamix 2 Automatic Mixing Unit. The Penta Cartridges are reinforced with a metal cylinder. The new design of the foil bag caps permits optimal dispensing of the paste. The Penta Mixing Tip Red has a new design which reduces the dispensing forces by up to 50 percent. 7
1.2. Express 1 The light-bodied wash material The low-viscosity Express is mixed automatically in the dispenser and is specially formulated for use with Express Penta Putty. It has outstanding flow properties, even in the moist oral environment, and offers high mechanical strength. Advantages of the material in use Automatically homogeneous and void-free mixing quality Ideal dispenser system for the dental practice Permits direct intraoral application Very good hydrophilisation Outstanding flow properties Precise detail reproduction Ideal for precisely fitting restorations Pronounced structural viscosity High tensile strength during removal and further processing in the laboratory 8
1.2. Express Chemical background 1 The increased molecular crosslinking density after setting gives Express greater mechanical strength than conventional light-bodied addition-cured silicones. It offers extremely high tensile strength both during removal from the patient s mouth and when fabricating the model in the laboratory. Very good hydrophilisation means excellent flow properties even in the moist oral environment. The small proportion of microfine fillers which are very weakly crosslinked with each other, increases the structural viscosity: even minimal pressure is sufficient to make Express flow perfectly, while without pressure, the material is stable. This also makes it ideal for syringing around the prepared teeth. Express flows finely, and is extremely resilient after setting, thanks to the strengthened molecular network. 9
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In-Vitro Research 2 11
2.1. Insertion Resistance of Putty Silicones 2 Comparison of insertion forces of conventional and new automixed putty impression materials Introduction To date it still has not been possible for a large number of dentists to take advantage of the benefits of automixing systems for their impression material for the tray. These dentists prefer to use putty silicones for taking precision impressions. Due to their very high viscosity levels, these materials have been typically mixed by hand, incurring the associated disadvantages such as nonhomogeneity and the presence of voids in the mix. In particular dentists value putty silicones because of their high resistance on insertion of the tray and the resulting high pressure that forces the low viscosity wash material deep into the sulcus. In addition, the mixed material can be distributed and shaped in the impression tray with the finger. With Express Penta Putty the objective is to also offer this group of dentists a suitable impression material with putty characteristics that can be automatically mixed in the Pentamix Automatic Mixing Unit. Objective A valuable property of putty silicone impression materials is high resistance on insertion of the tray. The aim of this study is to compare the insertion force of conventional handmix putty materials to the new automix VPS putty impression material Express Penta Putty. 12
2.1. Insertion Resistance of Putty Silicones Comparison of insertion forces of conventional and new automixed putty impression materials Materials and methods* 2 The new Express Penta Putty (3M ESPE, EXPR) was compared to handmixed products: Optosil Comfort Putty (Heraeus Kulzer, OPTO), President Putty Fast Soft (Coltene, PRES), Panasil Putty Soft (Kettenbach, PANA). To differentiate putties from heavy bodies, Dimension Penta H Quick (3M ESPE, DIME) was added to the comparison. For the automixed materials a new low force mixing tip was applied. All materials were mixed for exactly 30 seconds before testing. The test was conducted on the Zwick Z010 testing machine to guarantee reproducible results. Testing machine Equal quantities of each putty were placed between specially formed dies, which were moved together with the same velocity until a defined distance was reached. During this movement the insertion force of the different putties was recorded. Filled die * See back page for trademarks information Crosssection showing form of dies 13
2.1. Insertion Resistance of Putty Silicones 2 Comparison of insertion forces of conventional and new automixed putty impression materials Results The insertion forces were (units in N, SD in brackets): EXPR: 3423,0 (500,0) OPTO: 2256,7 (132,4) PRES: 3489,1 (336,6) PANA: 3647,2 (235,9) DIME: 1288,7 (175,3). 3M ESPE Express Penta H-Quick 3M ESPE Express Penta Putty Optosil Comfort Putty Panasil Putty Soft President Putty Fast Soft As shown by ANOVA (p<0.05), the range of the insertion force of putties in this study is in the area of 2000 to 4000 N. The insertion force of the automix VPS 3M ESPE Express Penta Putty is within the typical range of conventional handmix putties. The values of the heavy body impression material DIME were significantly below this range. 14
2.1. Insertion Resistance of Putty Silicones Comparison of insertion forces of conventional and new automixed putty impression materials Discussion 2 The high insertion force of the new automix VPS Express Penta Putty is possible due to the special rheological properties of the paste system: The structural viscosity of the material leads to lower viscosity while mixing (high shear rates) but putty consistency in the tray (low shear rates). In addition to that the mixing process is optimized by reinforced Penta Components (page 7). Conclusion With respect to the insertion resistance the automixed material 3M ESPE Express Penta Putty shows typical putty properties and offers characteristics similar to handmixed putties. Comparable insertion resistance 15
2.2. Tensile Strength and Contact Angle of VPS 2 Correlation of wetting behaviour and mechanical properties of light-bodied (LB) VPS materials Introduction The clinical success of a precision impression material depends on many different factors. Important features are for example good mechanical properties of the elastomer during removal of the set impression from the mouth and good wetting behaviour in the moist environment and while pouring the impression. The hydrophilicity of VPS impression material can be increased by addition of surfactants. But these surfactants may interfere with the elastomer network formation and thus weaken the physical properties of set impression materials. This plasticizer effect can result in a reduction of the tensile strength of the cured silicone material. Thus hydrophilization of VPS impression materials may cause an increased risk of tearing during removal of the impression from the patient s mouth. Typical molecular structures of wetting agents for VPS impression materials Hydrophilicity of VPS impression materials normally is defined by a measurement of contact angles of drops of water on the surface of impression materials. Therefore an important goal for the development of new hydrophilic VPS impression materials is to combine highest possible tensile strength with lowest contact angels. To improve the elastomeric properties of a new hydrophilic VPS impression material the network of the chemical matrix was reinforced. Newly developed crosslinkers build up a higher crosslink density of the elastomeric network after setting to compensate the loss of tensile strength caused by the surfactant. 16
2.2. Tensile Strength and Contact Angle of VPS Correlation of wetting behaviour and mechanical properties of light-bodied (LB) VPS materials Objective 2 The aim of this study was to investigate the influence of the degree of hydrophilization on the elastomeric properties of VPS impression materials. A newly developed VPS impression material with a reinforced network was compared to several conventional products. Measurement of Tensile Strength Measurement of Contact Angle Materials and methods* Tensile strengths and hydrophilization of the following materials were compared: Provil Novo Light C. D. Fast set (Heraeus Kulzer, PN, LOT 200397), Express Light (3M ESPE, EL, LOT 20010208), Panasil Contact Plus (Kettenbach, PC, LOT 30451) and the newly developed Express (3M ESPE, EU, experimental batch). To determine the degree of hydrophilization three specimens (38 mm x 32 mm x 3 mm) of each material were produced. One hour after mixing base and catalyst paste the 10 second contact angle (CA) of four drops of water on each specimen was determined using a standard goniometer. Tensile strength was determined by producing six l-shaped specimens with a central unit of 20 mm x 4 mm x 2 mm. Ten hours after mixing of base and catalyst paste tensile strength was measured using a Zwick machine. * See back page for trademarks information 17
2.2. Tensile Strength and Contact Angle of VPS 2 Correlation of wetting behaviour and mechanical properties of light-bodied (LB) VPS materials Results Mean values and standard deviations are given in the following table. ANOVA (p<0.05) and Tukey tests confirmed significant differences for contact angels and tensile strength data, except groups indicated by asterisks. Material EL PN PC EU CA 65 (1) 78 (2) 105 (1) 42 (4) Tensile Strength 2,4 MPa (0.1)* 2,6 MPa (0.1)* 3,1 MPa (0.2) 4,4 MPa (0.4) Tensile Strength Tensile Strength Tensile Strength Express Green Wash Express Ultra-Light Panasil Contact Plus Provil Novo Light Express Green Wash Express Ultra-Light Panasil Contact Plus Provil Novo Light Express Green Wash Express Ultra-Light Panasil Contact Plus Provil Novo Light Express Green Wash Express Ultra-Light Panasil Contact Plus Provil Novo Light 18
2.2. Tensile Strength and Contact Angle of VPS Correlation of wetting behaviour and mechanical properties of light-bodied (LB) VPS materials Discussion 2 All products in this test are Type 3 VPS impression materials. EL, PN, PC show significantly different degrees of hydrophilization. For these products a decrease in contact angle seems to be connected to a decrease in tensile strength although tensile strength data for EL and PN are not significantly different. Only EU (3M ESPE Express ) does not fit into this series as it shows the highest hydrophilicity (lowest contact angels) and the highest tensile strength in this test. This may be due to the reinforcement of the VPS network which was realized by addition of newly designed crosslinkers. Those are believed to increase the crosslink density of EU and thus compensate the weakening effect of surfactants in this case. This may be supported by the fact that the consistency of EU (3M ESPE Express ) is on a comparable level as the other materials in this study. Therefore the higher tensile strength of EU (3M ESPE Express ) should mainly result from an increased crosslink density of the VPS network and not from a higher filler content. Conclusion EL, PN and PC show a tendency towards decreasing tensile strength with increasing degree of hydrophilicity indicated by decreasing contact angle. In contrast 3M ESPE Express shows the highest tensile strength and hydrophilicity in this test. 19
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European Field Evaluation Results 3 21
3.1. Participants / Result Categories Comprehensive assessment by more than 220 dentists 3 As part of a European dental practice study, in which more than 220 dentists from ten countries took part, over 3,000 impressions were taken with Express Penta Putty. The participating dentists then assessed Express Penta Putty and Express, and their automatic handling in the Pentamix 2 Automatic Mixing Unit, in a detailed survey. Their opinions about the impression quality were also included in the study. The sequence in which the results of this extensive evaluation are presented in the first subsections basically reflects the chronology of the impression-taking process. The last subsection focuses on the assessment of the system as a whole. Express Penta Putty and Express Vinyl Polysiloxane Impression Material 22
3.2. Impression Techniques, Materials, Indications Details about use 32 percent of the participating dentists used the two-step putty wash technique exclusively, while 31 percent used the one-step tray wash technique for all their impressions, and the remaining 37 percent used both techniques. Express Penta Putty and Express were used with the two-step putty wash technique for half of all the impressions taken. With the one-step tray wash technique, the same material combination was used for 37 percent of all the impressions. For the remaining 13 percent, Express Penta Putty was combined with another VPS light-bodied wash material from 3M ESPE. The indications for over 80 percent of all the impressions were crowns (56 percent) and bridges (27 percent). The majority of the dentists (65 percent) used metal fullarch trays (52 percent), and metal partial trays (13 percent) were used in addition. 3 Total number of impressions for each indication 1.577 Number of impressions 771 293 172 Crowns Bridges Inlays/Onlays Others 23
3.3. Assessment of the Tray Material Automatic mixing and dispensing 3 100 % of dentists 75 50 25 0 64% 29% 6% Very Easy Easy No advantage 93 percent of participating dentists assessed automatic mixing and dispensing with the Pentamix 2 Automatic Mixing Unit as easy or very easy. 100 % of dentists 75 50 25 80% 20% 0 Precise to the gram No advantage Not even an experienced user of malleable silicone can work to such a degree of accuracy: 80 percent of participants considered dispensing with the Pentamix 2 Automatic Mixing Unit to be precise to the gram. 24
3.3. Assessment of the Tray Material Automatically homogeneous and void-free mixing 100 75 82% 3 % of dentists 50 25 0 Always homogeneous & free of bubbles 15% Mostly homogeneous & free of bubbles 3% No advantage The mixing quality also impressed in the dental practice: 82 percent of the dentists described the mixed Express Penta Putty VPS Material as always homogeneous and free of bubbles. 100 % of dentists 75 50 25 0 53% 38% 9% Much better Somewhat better No advantage 91 percent judged the mix quality of Express Penta Putty VPS Material to be better or much better compared with the usual hand mixing of their putty material. 25
3.3. Assessment of the Tray Material Material saving; hygienic handling 3 100 % of dentists 75 50 25 0 51% 38% 11% High Medium Small The amount of material saved by automatic handling in the Pentamix 2 Automatic Mixing Unit was stated as high or medium by 49 percent of users. 100 % of dentists 75 50 25 70% 26% 0 Very good Good Requires some adjustment of the user 4% 96 percent considered the hygiene with automatic mixing of the putty material in the Pentamix 2 Automatic Mixing Unit good or very good, compared with the usual hand mixing of the malleable silicone. 26
3.3. Assessment of the Tray Material Essential for any putty material: malleable with your finger 100 3 % of dentists 75 50 25 0 57% 33% 10% Very well Well Not too well A classic putty characteristic which HB materials do not offer. 90 percent of the dentists found that the mixed Express Penta Putty VPS Material paste could be moulded well to very well with their fingers. 27
3.3. Assessment EFE: Bewertung of the des Tray Löffelmaterials Material Good values for putty consistency and carvability 3 100 % of dentists 75 50 25 0 58% 32% 10% Very good Good Not too good The viscosity of the material impressed putty users: 90 percent of the study participants found the putty consistency of Express Penta Putty VPS Material good or very good. 100 % of dentists 75 50 25 0 61% 20% 16% 3% Very easy Easy Somewhat difficult Very difficult A decisive advantage for two-step putty wash impressions: Express Penta Putty VPS Material was described by 81 percent of participants as easy or very easy to carve. 28
3.3. 3.4. Assessment EFE: Bewertung of the des Light-bodied Löffelmaterials Wash Material Excellent flow properties, high stability 100 3 % of dentists 75 50 25 0 37% 38% 14% 9% 1% Excellent Good Satisfactory Poor Very poor 75 percent of the dentists said that the flow of the low-viscosity Express Wash Material onto the prepared tooth was good or excellent. 100 % of dentists 75 50 25 0 50% 19% 18% 11% 2% Excellent Good Satisfactory Poor Very poor The stability of Express Wash Material on the prepared tooth was judged good or excellent by 69 percent. 29
3.3. 3.4. Assessment EFE: Bewertung of the des Light-bodied Löffelmaterials Wash Material High tear strength, fine detail reproduction 3 100 % of dentists 75 50 25 0 56% 19% 19% 5% 1% Excellent Good Satisfactory Poor Very poor The tear strength of the low-viscosity Express Wash Material was assessed by 75 percent of users as good or excellent. 100 % of dentists 75 50 25 0 40% 42% 13% 4% 0% Excellent Good Satisfactory Poor Very poor The very good hydrophilisation impressed in the dental practice: 82 percent of dentists also judged the detail reproduction of Express Wash Material to be good or excellent. 30
3.3. 3.5. Assessment EFE: Bewertung of the des Result Löffelmaterials Quality Superior impression precision in the view of many dentists 100 3 75 % of dentists 50 25 30% 47% 18% 0 4% 0% Excellent Good Satisfactory Poor Very poor The precision of impressions taken with Express Penta Putty VPS Material and Express Wash Material was assessed by 77 percent of users as excellent or good. 100 75 % of dentists 50 25 0 11% Much better 45% Somewhat better 29% No difference 12% Somewhat worse 4% A lot worse 56 percent of participating dentists stated that they achieved somewhat better or much better impression precision with Express Penta Putty VPS Material and Express Wash Material than with their existing impression material. 31
3.3. 3.5. Assessment EFE: Bewertung of the des Result Löffelmaterials Quality Impressive accuracy of fit of the fabricated prosthetic work 3 100 % of dentists 75 50 25 0 54% 30% 14% 3% 0% Excellent Good Satisfactory Poor Much poor 84 percent of test participants awarded a rating of good or excellent for accuracy of fit of the fabricated restoration. 100 75 % of dentists 50 25 0 8% Much better 29% Somewhat better 50% No difference 11% Somewhat worse 1% A lot worse 37 percent described the accuracy of fit of the fabricated prosthetic work as better or much better than with the impression material they used up to now. 32
3.3. 3.5. Assessment EFE: Bewertung of the des Result Löffelmaterials Quality Dental laboratory assessment confirms favourable opinion from the dental practice 100 3 % of dentists 75 50 25 0 66% 18% 14% 1% 1% Excellent Good Satisfactory Poor Very poor Positive feedback from the dental laboratory: 84 percent of the dental technicians involved rated the impression quality with Express Penta Putty VPS Material and Express Ultra-Light Body Wash Material as good or excellent. 100 75 % of dentists 50 25 0 8% Much better 40% Somewhat better 40% No difference 9% Somewhat worse 2% A lot worse Compared to impressions taken with the usual materials from the respective practice, 48 percent of dental technicians considered the impression quality with Express Penta Putty VPS material and Express Wash Material better or much better. 33
3.6. Assessment of the Complete System Overall assessment compared to previously used material 3 100 75 % of dentists 50 25 0 11% Much better 49% Somewhat better 19% 17% No difference Somewhat worse 4% A lot worse 60 percent of test users rated Express Penta Putty VPS Material somewhat better or much better overall than the material they normally used for the impression tray. 100 75 % of dentists 50 25 0 14% Much better 38% Somewhat better 24% No difference 19% Somewhat worse 6% A lot worse Express Wash Material was judged by 52 percent of the dentists to be somewhat better or much better than the light-bodied wash material they used up to now. 34
3.6. Assessment of the Complete System Changes to the method of working thanks to the Pentamix 2 Automatic Mixing Unit 100 3 % of dentists 75 50 25 0 47% Easier overall 25% 53% 48% 7% More relaxed Cleaner More hygienic More elaborate overall When asked about automatic mixing in the Pentamix 2, the test dentists stated how they found the new method of working (multiple answers were possible): 53 percent of all participants considered automatic mixing of the putty material in the Pentamix 2 Automatic Mixing Unit to be cleaner compared to normal hand mixing. 48 percent said it was more hygienic, and almost as many (47 percent) found that mixing with the Pentamix 2 was easier overall. Furthermore, one in four dentists thought it worth special mention that the automatic mixing method for the putty required less effort and was more stress-free. 35
3.6. Assessment of the Complete System Assessments categorised according to material combination and dentist s preferred technique 3 The users were asked what they considered to be the two biggest advantages of the new impression system. The answers received were then categorised by preferred technique and material combination. Express Penta Putty combined with Express The following ranking is derived from the response of dentists who only use the two-step putty wash technique: Hygiene, ease of handling, high precision/accuracy of fit. Dentists who only use the one-step tray wash technique also put hygiene at the top of their list, followed by mixing quality and ease of handling. Hygiene was also the number one advantage in the view of dentists who use both techniques, depending on the particular indication. Simple usage and outstanding precision and accuracy of fit came in at numbers two and three. Express Penta Putty combined with another LB VPS material from 3M ESPE Dentists who only take one-step tray wash impressions and also use Express Penta Putty in combination with another addition-cured silicone light-bodied wash material from 3M ESPE regarded the mixing quality and specific consistency of the putty material as the two most important advantages. Participants who use both the one-step and two-step impression techniques with the same material combination particularly valued the fact that the material is suitable for both. Further advantages cited were the high precision and mixing quality. 36
3.6. Assessment of the Complete System Around four out of five dentists intend to recommend the material to their colleagues 100 3 % of dentists 75 50 25 68% 18% 14% 0 Yes No No reply Many of the dentists would like to pass on their positive experiences: 79 percent of all the participants in Europe intend to recommend the new impression material to their colleagues. Irrespective of the material combination or impression technique used, these dentists stated that the ease of handling was the most important argument for their recommendation. They were equally impressed by the hygiene, cleanliness and precision. Those who only use the one-step tray wash technique put the speed of use in second place. Dentists who only use the two-step putty wash technique describe the system as an ideal solution for the two-stage method in the dental practice. 37
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Testimonials by the Study Participants 4 39
4. Personal Comments by the Participating Dentists Impressively easy to use 4 In unsolicited comments, the participants in the European dental practice study reported on what they particularly liked about Express Penta Putty/Ultra-Light Body. The individual statements by the dentists covered a wide range of advantages for impression taking in the dental practice. The ease of handling, consistent mixing quality, reliable precision plus hygiene and cleanliness are quite evidently aspects to which the study participants personally attach importance. Ideal for different techniques and material combinations Both the users of the two-step putty wash technique and dentists who prefer the one-step tray wash technique are convinced of the benefits offered by the new materials. Numerous participants additionally singled out the advantages of the new Express Penta Putty in combination with their normal choice of addition-cured wash material from 3M ESPE. (Further information about the possible combinations of viscosities can be found in the section Questions and Answers.) 40
4. Personal Comments by the Participating Dentists Try it yourself Germany, 2-step-technique user Very precise, well fitting results, economical Germany, 2-step-technique user Clean, hygienic, easy to handle solution for 2-step-technique German user Easy and no-stress handling Germany, 2-step-technique user Easy to carve Germany, 2-step-technique user No more mixing assistant, constant impression quality, clean working process Germany, 2-step-technique user 4 Perfect material for two-step technique Italian user Absence of bubbles Italy, 1-step and 2-step-technique user Precise, fast hygienic Italy, 1-step-technique user Reliability and ergonomy France, 1-step-technique user The top of the technology France, 1-step-technique user Very good for a doctor working alone France, 1-step-technique user Quick, clean, precise, hygienic France, 4 different 2-step-technique users Very easy to use Spain, 7 different users, 1-step and 2-step-technique Real putty for Pentamix Spain, 1-step and 2-step-technique user Express is the best Ultra-light Spain, 1-step and 2-step-technique user We are very happy to use this material and use it with the Pentamix mixer Sweden, 1-step and 2-step-technique user (existing 3M ESPE wash) Always equal mixing Sweden, 1-step-technique user (existing 3M ESPE wash) Easy, accurate, precise Sweden, 1-step-technique user (existing 3M ESPE wash) Excellent material Price? Sweden, 1-step-technique user (existing 3M ESPE wash) Will be used in our practice in the future Norway, 1-step-technique user (3M ESPE wash) I m very satisfied with this system and material and can recommend it Norway, 1-step-technique user (3M ESPE wash) Easy mixing procedure for assistant Norway, 1-step-technique user (3M ESPE wash) Good Norway, 1-step-technique user (3M ESPE wash) 41
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Questions and Answers 5 43
5. Questions and Answers Can Express Penta Putty also be mixed in the Pentamix 1 Automatic Mixing Unit? 5 No, Express Penta Putty must be mixed in the Pentamix 2 Automatic Mixing Unit. Only this unit has the necessary mixing speed. Specific added components ensure reliable mixing of the heavy-bodied Express Penta Putty in the Pentamix 2: Special Penta Mixing Tips Red reduce the dispensing forces. The new design of the foil bag end and the metal-reinforced Penta Cartridge guarantee the required mechanical strength. What will happen if conventional mixing tips are fitted to the Pentamix 2 by mistake? The end of the Express Penta Putty foil bag is designed so that only the new (red) Penta mixing tips can be fitted. Accidental use of old (white) tips is therefore impossible. What types of tray are ideal for Express Penta Putty? Torsionally rigid edentulous or partial metal trays, with or without perforation, are the most suitable. For reliable adhesion of the impression material, the tray is pre-treated with a tray adhesive for addition-cured silicones, e.g. 3M ESPE VPS Tray Adhesive. Undercuts should be blocked out. What points require special attention if you want to mould Express Penta Putty in the tray with your finger? Just a few seconds after filling the tray from the Pentamix 2, the material in the tray can be moulded as required with your finger, with no sticking just like any malleable silicone. As with other addition-cured silicones for precision impressions, you should avoid direct contact with the material if you are wearing latex gloves. It is therefore recommended to use vinyl gloves. 44
5. Questions and Answers For which impression technique are Express Penta Putty and Express most suitable? Express Penta Putty and Express is the ideal combination for the two-step putty wash technique and the one-step tray wash technique. For the one-step putty wash technique Express Penta Putty can be also combined with other 3M ESPE wash materials (e.g. Express Light Body [blue] or Imprint II Garant Quick Step [orange]). Advantages for two-step putty wash impressions: The two-stage method is particularly suitable for the dental practice thanks to the agreeably short working and setting times of both viscosities. The putty material is easy to carve. Its high ultimate strength means that the preliminary impression exerts a high pressure, so that the wash material flows finely and can be pressed into the sulcus efficiently. 5 Advantages for one-step tray wash impressions: The automatic mixing of both consistencies and the short working and setting times make the single-stage method even quicker, as confirmed by numerous assessments by dental practices. What wash materials can Express Penta Putty be combined with? The low-viscosity Express was developed specially for use with Express Penta Putty. However, the automatically mixable Express Penta Putty can also be used in combination with other addition-silicone wash materials from 3M ESPE. Like all addition-cured silicones, Express Penta Putty and Express Ultra-Light Body are not compatible with condensation-cured silicones, alginates or polyethers. How should the area where the impression is to be taken be prepared? If a retraction cord is used, this should first of all be thoroughly removed. All the areas of which an impression is required must be dried. As from when can the model be cast? Just two hours after disinfection, the model can be produced with a standard dental stone. To prevent voids on the model, the impression is rinsed with water and blown dry shortly before casting. Alternatively, a silicone wetting agent can be used. 45
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The charts in this brochure were reproduced by 3M ESPE from the data listed in the cited sources. 3M ESPE AG ESPE Platz 82229 Seefeld Germany 3M ESPE Dental Products 3M Center Building 0275-02-SE-03 St. Paul, MN 55144-1000 USA 3M, ESPE, Dimension, Express, Garant, Imprint, Penta and Pentamix are trademarks of 3M or 3M ESPE AG. Optosil and Provil are trademarks of Heraeus Kulzer. President is a trademark of Coltene. Panasil is a trademark of Kettenbach. 3M 2005 All rights reserved