1. Impressions

2. Accu-Dent Impression System
Irreversible hydrocolloid (hydrophilic)
Two viscosities
Non-slumping
Premeasured sealed packaging
Syringe delivery
Temperature controlled
Unique tray design
Single entry impression system
The accu-dent system one has been formulated to meet the challenges of taking an impression of the edentulous mouth. The tray gel has very heavy viscosity that gives it the necessary body to reach into the sulcular areas without slumping. The syringe gel has a much less viscosity and therefore is capable of accurately recorded the tissue surface. In addition the specially designed impression trays and the unique delivery syringe complete the system.
Irreversible hydrocolloid
Is still the best material to take moist tissue impressions due to the hydrophilic (attracted to water) nature of this material.
Non slumping
This is one of the physical properties that separates this material from other alginates. The special formulation of this material prevents the material from slumping during the setting of the material. Unlike other alginates that tend to sag or slump causing inaccuracies.
Two viscosities
The syringe gel is easily loaded and delivered by the syringe. The tray material is a much heavier viscosity and helps to carry the material into the difficult to reach edentulous sulcular areas.
Premeasured sealed packaging
Reduces the chance of inaccurate measurement of material. Also keeps the material from “fresh” many times longer than alginates stored in a can.
Syringe delivery
This is an excellent means of delivering the syringe gel to the vestibular sulcus. It practically guarantees the prevention of air entrapment or large voids temperature control
Able to increase or reduce setting time by simply increasing or decreasing the water temperature. This does not effect the accuracy of the material
Unique tray design
Trays are specifically designed to work best with the accu-gel materials. Their unique design and tray selection greatly increases the chance that the first impression is the last.

3. Accu-Dent Impression System
System 1 (edentulous)
System 2 (dentate)
The accu-dent system one has been formulated to meet the challenges of taking an impression of the edentulous mouth. The tray gel has very heavy viscosity that gives it the necessary body to reach into the sulcular areas without slumping. The syringe gel has a much less viscosity and therefore is capable of accurately recorded the tissue surface. In addition the specially designed impression trays and the unique delivery syringe complete the system.
Irreversible hydrocolloid
Is still the best material to take moist tissue impressions due to the hydrophilic (attracted to water) nature of this material.
Non slumping
This is one of the physical properties that separates this material from other alginates. The special formulation of this material prevents the material from slumping during the setting of the material. Unlike other alginates that tend to sag or slump causing inaccuracies.
Two viscosities
The syringe gel is easily loaded and delivered by the syringe. The tray material is a much heavier viscosity and helps to carry the material into the difficult to reach edentulous sulcular areas.
Premeasured sealed packaging
Reduces the chance of inaccurate measurement of material. Also keeps the material from “fresh” many times longer than alginates stored in a can.
Syringe delivery
This is an excellent means of delivering the syringe gel to the vestibular sulcus. It practically guarantees the prevention of air entrapment or large voids temperature control
Able to increase or reduce setting time by simply increasing or decreasing the water temperature. This does not effect the accuracy of the material
Unique tray design
Trays are specifically designed to work best with the accu-gel materials. Their unique design and tray selection greatly increases the chance that the first impression is the last.

4. Accu-Dent System 1 Impression System

5. Accu-Dent System 1 Impression System
System one Accu-gel materials are specially formulated to make impressions of edentulous arches dentate arches
The trays are specifically designed for this purpose
It features a syringe system that facilitates the delivery of impression material into the buccal and labial flange areas

6. Impressions for the maxillary edentulous arch

7. The syringe gel mixes quickly and smoothly
Use the “System 1” side of the measuring vial to proportion the exact amount of water for the syringe gel
The syringe gel mixes quickly and smoothly

8. Syringe Gel Remove the plunger and back load the syringe
Engage the plunger and press material into the syringe tip

9. Tray Gel
Again use the “System 1” side of the vial to measure the appropriate amount of water for the tray gel

10. Tray Gel
Note that the tray gel appears dry at the start of mixing. Do not add water. In several seconds it will develop into a creamy mix.

11. Rub the surface of the loaded tray material with water
Loading the Tray
Rub the surface of the loaded tray material with water
Note the tray material is loaded heaviest in the anterior section of the tray

12. Loading the Tray
Apply a small amount of material on the initial loading of the tray. This allows the material to be pressed into the retentive holes of the tray
After all the retentive holes have been engaged add the remaining material to the tray

13. Making the Impression
Begin injecting the material directly into the hamular notch area on one side of the arch
Continue injecting (keeping the tip of the syringe imbedded into the material) up to the labial frenum and stop

14. Making the Impression
Inject into the hamular notch of the opposite side and continue forward to the labial frenum

15. Inject some material to anterior hard palate area
Making the Impression
Inject some material to anterior hard palate area
Note how the material “attaches (hydrophilic)” to the tissue and does not “drip (non-slumping)”

16. Taking the Impression
Gently seat the tray in the patient’s mouth (do not overseat”
As soon as material extrudes from the back of the tray “stop” seating

17. Border Molding
Gently hold the lower border of the upper lip and pull forward
Have patient slowly open wide

18. Gently massage the right and left cheeks of the patient
Border Molding
Gently massage the right and left cheeks of the patient

19. Thoroughly rinse impression of saliva
Tray Removal
Carefully remove the impression by breaking the seal at the perpheral borders (Do not remove impression by tugging on the handle of the tray)
Thoroughly rinse impression of saliva

20. Tray Removal
Disinfect impression using materials and techniques appropriate for irreversible hydrocolloid materials
Support the impression using the Accu-dent tray holder (do not lay impression on counter)

21. Note the accuracy of the peripheral border registrations
Final Impression
Note the accuracy of the peripheral border registrations

22. In particular note the detailed registration of the hamular notch area
Final Impression
In particular note the detailed registration of the hamular notch area

23. Border molded final maxillary impression

24. Impressions for the mandibular edentulous arch

25. The mandibular Accu-dent impression is not a border molded like the maxillary impression
The intent of the mandibular impression is to obtain a “fully extended impression” to facilitate the identification of the anatomical landmarks that will guide the outline of the denture border extensions

26. Moderately resorbed ridges gradually incline to the ramus
Tray Selection (distal rise)
Moderately resorbed ridges gradually incline to the ramus
This gradual incline (low distal rise) is reflected in the mandibular trays #25-29

27. Tray Selection (distal rise)
Severely resorbed ridges have a more abrupt incline to the ramus
This high distal rise is reflected in the mandibular trays #20-24

28. Tray Selection (size)
The “tray selection tool” facilitates the proper size selection for the mandibular impression tray
Measure approximately where the first molars are located on patients existing denture or on their ridge and select a tray that lines up to the center of the retentive holes of the tray

29. Making the Impression
The syringe gel material is first injected first over the retromolar pad area and than pulled forward up to the midline area

30. Making the Impression
The opposite retromolar pad is covered and the material is pulled forward to meet the contra-lateral side
Insert the loaded tray asking the patient to place their tongue between the lingual flanges of the tray

31. Fully extended mandibular impression

32. Fully extended mandibular impression options
If the anatomy is accurately identified and marked this impression can serve as the final impression

33. Fully extended mandibular impression options
….or this impression can serve as preliminary impression for the fabrication of a custom impression tray

34. Fully extended mandibular impression options
….or this impression can serve to fabricate a interim denture that will be functionally relined several weeks after delivery

35. Impressions for the partially edentulous arch

36. Accu-Dent System 2 Impression System

37. Accu-Dent System 2 Impression System
System two Accu-gel materials are specially formulated to make impressions of dentate arches for partial dentures, crown & bridge opposing casts, occlusal splints, diagnostic casts, etc.
The trays are specifically designed for this purpose
It features the Pre-Sure tip that attaches to the syringe that virtually guarantees bubble free impressions of tooth surfaces

43. The “Pre-Sure tip” facilitates the delivery of the Accu-gel material directly to the teeth and surrounding gingiva and virtually guarantees a bubble free impression

44. The tip is flexible and can be pressed against the teeth and gingiva without discomfort to the patient
The tip provides an excellent vehicle to accurately deliver the syringe gel

45. Place the Pre-Sure tip firmly against the last tooth in the arch and drag forward while injecting

46. Turn the syringe at a 45 degree angle in the anterior area and press firmly against the labial surfaces of the teeth

47. Do the same to the opposite side of the arch
Inject directly onto the lingual surfaces of the anterior teeth

48. Remove the Pre-Sure tip and inject into the buccal and labial sulcus
Inject some material onto the anterior hard palate area

49. Note the “clarity” of the teeth and surrounding gingiva
Final Impression
Note the “clarity” of the teeth and surrounding gingiva

50. Note the accuracy and extension of the peripheral borders
Final Impression
Note the accuracy and extension of the peripheral borders

51. System 2 cast preparation
Double pour technique

52. Optional Die Stones psi exp cost Milestone* Heraeus 18,000 .08 55
Resin Rock* Whip mix 11,
Die stone Heraeus 15,
True stone Heraeus 15,
Die keen Heraeus 18,
*Milestone & Resin Rock are resin reinforced and therefore provides strength in thin areas
Note: Fugi Rock (GC) & Vel Mix (Kerr) are not compatible with Accu-dent

53. Wait until the cast appears to be “dry” before inverting
Always support the cast into the impression holder that comes with the Accu-Dent kit
Wait until the cast appears to be “dry” before inverting

54. Prepare second mix of stone and invert impression to form the base

55. These impression were poured using die stone
These impression were poured using die stone. Note the “retentive tabs” left on the surface which will mechanically retain the plaster base
The “retentive tabs” will allow the plaster base to be poured later in the day

56. It is economical to make the second pour in plaster
Also the plaster is much easier to trim

57. Note the absence of occlusal and surrounding gingival defects
Final Impressions
Note the absence of occlusal and surrounding gingival defects

58. Accurate impressions replicate patient’s occlusion
Final Impressions
Accurate impressions replicate patient’s occlusion