Busy. Please wait.
Log in with Clever
or

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever
or

Username is available taken
show password

Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Test 3

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
show negative replica of the teeth and or gingival tissue in the mandibular and maxillary arch  
🗑
what are the requirements of impression materials?   show
🗑
show chain lengthening, cross linking, thermoset (permanent)  
🗑
show solidification: waxes gelation: doesn't get solid like wax, more jello like thermoplastic (reversible)  
🗑
show inelastic: rigid and inflexible elastic:; rubbery and flexible  
🗑
show rigid and inflexible used on edentulous patients (no undercut)  
🗑
show impression compound (thermoplastic) zinc oxide eugenol paste (chemical set) impression plaster (chemical set) impression waxes (thermoplastic)  
🗑
show wax with added fillers, more brittle but flows mud less when compared to wax  
🗑
what are the characteristics of inelastic impression plaster?   show
🗑
what are the characteristics of inelastic impression wax?   show
🗑
show rubbery and flexible dentulous or edentulous  
🗑
show hydrocolloids (water based impression material) aqueous or non aqueous non aqueous: elastomers and cross linked polymers  
🗑
show agar and alginate  
🗑
show thermoplastic and reversible hydrocolloid  
🗑
what is alginate characteristics?   show
🗑
what do agar and alginate change to?   show
🗑
show changes from a rubber like gel to a liquid like sol by raising and lowering the temperature physical change no chemical reaction  
🗑
what is the agar composition?   show
🗑
what are the baths of the hydrocolloid condition for Agar?   show
🗑
show quick snap, DO NOT rock back and forth pour up impression immediately in gypsum  
🗑
show temperature at which hydrocolloid liquefies is not same temperature at which it solidifies  
🗑
what temperature does sol transform into gel liquid to gel   show
🗑
show 70 degrees C  
🗑
show very accurate impression, works well in a wet environment useful fro taking impressions when the margins of crown prep are subgingival  
🗑
show require special equipment, unstable impression material, if stored must be 100% humidity, tears easily upon removal, can only be poured in gypsum ONE TIME  
🗑
show diagnostic casts, fabrication of provision restorations, fluoride and bleaching trays, mouth protectors  
🗑
what are the characteristics of alginate?   show
🗑
show potassium alginate, seaweed, calcium sulfate: ensures proper set of gypsum material, sodium phosphate: retarder to delay reaction, diatomaceous earth filler  
🗑
show cross linking causes gelation to occur calcium sulfate dihydrate+ water = calcium alginate  
🗑
show 20 C 70 F  
🗑
what is the working time for alginate   show
🗑
what is the setting time for alginate?   show
🗑
show low cost, slight reaction with gypsum, good patient acceptance  
🗑
what are the disadvantages of alginate?   show
🗑
show alginate dries up and shrinks when left out in the air  
🗑
what is imbibition?   show
🗑
steps for mixing alginate impression?   show
🗑
steps fro placing alginate in tray and making an impression?   show
🗑
how do you remove the alginate tray?   show
🗑
show 1 hour  
🗑
show improper mixing, prolonged mixing, water to powder ratio too low  
🗑
show premature removal from mouth  
🗑
show air incorporated during mixing, moisture or berks on tissue  
🗑
show inadequate cleaning of impression  
🗑
show impression not poured immediately, movement of the tray during elation, renature removal from mouth, improper removal from mouth by rocking  
🗑
what are the types of gypsum?   show
🗑
show die stone  
🗑
show mostly white, most porous form, irregular shape usually used to make diagnostic casts, treatment planning and study models  
🗑
what is lab/dental stone?   show
🗑
show high strength or improved stone, most uniform, densest form, hard, abrasive resistant  
🗑
what is gypsum rock naturally made out of?   show
🗑
what is gypsum rock in dentistry made out of?   show
🗑
show weaker and less resistant to abrasion  
🗑
what are the properties of plaster?   show
🗑
show calcium sulfate hemihydrate it goes from calcium sulfate hemihydrate to a calcium sulfate dihydrate  
🗑
what is made by direct and rapid heating process in open air?   show
🗑
what is made by steam pressure in a closed container?   show
🗑
show regular and uniform in shape, less porous, stronger and more expensive than plaster and referred to as alpha hemihydrate used for casts of diagnostic purposes  
🗑
show strongest, less expansive, more expensive strobe used mainly for making casts or dies for fabrication of crowns, bridge onlay/inlay  
🗑
which stone requires the least amount of water?   show
🗑
what does surface hardness depend on in gypsum?   show
🗑
which stone has the greatest density?   show
🗑
how much water do you mix for 100 g plaster powder?   show
🗑
show 28-30 ml  
🗑
show 19-24  
🗑
if you increase the amount of water to plaster/stone...   show
🗑
if you decrease the amount of water to plaster/stone...   show
🗑
an increase in spatulation time will...   show
🗑
does temperature affect dental stone?   show
🗑
what does slurry water do to dental stone?   show
🗑
show retarder, slows down reaction  
🗑
show accelerator, speeds up reaction  
🗑
show length of time from the start of the mix until the setting mass reaches a ski hard stage represents the available time for manipulating the product  
🗑
show represents the length of time from the start of the mix until the setting mass becomes rigid and can be separate from the impression (30-45 minutes) indicates the major completion of the hydration reaction  
🗑
what can you do to increase setting time of dental stone?   show
🗑
show increase mixing (longer mixing time, shorter setting time) lower water powder ratio (creates a thicker mix) add potassium sulfate (accelerator)  
🗑
what are preliminary impressions used for?   show
🗑
what are final impressions used for?   show
🗑
when selecting size of tray for impressions the width should...   show
🗑
show cover the retromolar pad, maxillary tuberosity and have 1/4 inch anterior clearance of the most protruded incisor  
🗑
show vaulted palate, labial frenum, peripheral roll, palatine fovea, impression of uvula  
🗑
show rinse casts under water, check drain in sink and hoses on model trimmer, make sure trimming platform is parallel to the counter top, make sure trimmer wheel is wet, remember to rinse periodically  
🗑
how should the back of the model be trimmed?   show
🗑
how should the base be trimmed?   show
🗑
show trim the backs of both models together so that they are perpendicular to the midline of the mouth use median raphe or labial frenum as guide  
🗑
how do you trim the maxillary cast?   show
🗑
show round off the anterior portion of the cast in the shape of an arch arch should extend from the canine eminence to canine eminence  
🗑
show posterior angles or heels of the cast at right angles to an imaginary line through the cuspids  
🗑
what should the total height of both casts in occlusion be?   show
🗑
show trim the sides of each parallel to a line through the central groove of the premolar teeth lowest depth of the vestibule (2-3 mm buccal to the lowest depth of the vestiuble on each side)  
🗑
show provides a dry, clean visible field, dark colors provide contrasting field and reduces eye fatigue, allows for more refined tooth preparation in absence of moisture from saliva while retraction cheeks, lips and gingival tissue  
🗑
show swallowing, aspirating small objects and debris  
🗑
show damage from rotary instruments and from dental materials which may be damaging  
🗑
what is the clinician protected from while patient wears rubber dam?   show
🗑
what are the disadvantages to rubber dams?   show
🗑
show partially erupted teeth, third molars, malposed teeth class V lesions on molars, asthmatic patients or psychological reasons  
🗑
what side should be facing the operator in rubber dams?   show
🗑
what is the purpose of rubber dam retainers and how should it be placed?   show
🗑
show edge placement difficult, seal around tooth difficult and tissue trauma may occur  
🗑
show the hole for the tooth to be restored is punched 1.0 to 1.5 mm facial to the alignment of the other holes clamp is positioned 1 mm below lesion to avoid gingival floor collapse  
🗑
show designated by a W in their identification  
🗑
how should you sterilize the rubber dam punch?   show
🗑
what should you never use as rubber dam lubricant?   show
🗑
show 5 teeth  
🗑
show lingually cusps of posterior teeth and cingulum of anterior teeth  
🗑
what should you do with higher/fuller papillae in rubber dam placement?   show
🗑
what happens if the holes are placed too close together?   show
🗑
show bunching of the dam inter proximally and limited access to proximal surfaces  
🗑
show smallest incisors  
🗑
show incisors and cuspids  
🗑
show cuspids and premolars  
🗑
show premolars and molars  
🗑
what is the number 5 hole on the rubber dam punch used for   show
🗑


   

Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
 
To hide a column, click on the column name.
 
To hide the entire table, click on the "Hide All" button.
 
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
 
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.

 
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how
Created by: Chobchi
Popular Dentistry sets