DENTAL WAX-TYPES,INLAY WAX IN DETAIL NOTES

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 DENTAL WAXES 


  • Low molecular weight ester of fatty acids derived from natural or synthetic components such as petroleum derivatives that soften to a plastic state at relatively low temperature 

  • Wax has been a valuable commodity for over 2000 years 

  • Carnauba wax:hardest,more durable 

CLASSIFICATION OF WAXES:

1)ACCORDING TO ORIGIN:

NATURAL :

MINERAL :Paraffin,ceresin

Carnauba,candelilla

PLANT;Carnauba,candelilla

INSECT:Beeswax

ANIMAL:Spermaceti wax

SYNTHETIC WAX

  • Acra wax
  • Aldo wax

2)ACCORDING TO USE AND APPLICATION:

A)PATTERN WAXES 

Inlay wax

Casting wax

Base plate wax





B)PROCESSING WAX:

Boxing wax

utility wax

Sticky wax

C)IMPRESSION WAX

Bite registration or corrective wax

BOXING WAX

  • Mode of supply : sheets 
  • Uses:controls the thickness of the border ,preserves the extension

UTILITY WAX:

  • Composition:beeswax,petrolatum
  • Mode of supply :sticks and sheets 
  • Properties:soft at room temperature 
  • Uses:to build up border of impression tray attaching a pontic of a bridge

STICKY WAX

  • Composition:yellow beeswax,rosin,gum dammar
  • Properties:hard,brittle,difficult to burn out 

USES:

  • To hold the broken part of gypsum cast 
  • To hold the metallic parts temporarily during soldering 







INLAY WAX
  • Special form of waxes used for direct,indirect wax pattern that mimics final preparation
  • Fabricated on cast/lab -indirect 
  • Fabricated directly on tooth its direct 
  • ADA specification no:4
  • Available in pellets,ropes,sticks
  • Colours:BLUE GREEN,IVORY,DEEP PURPLE
TYPES:
  • TYPE 1:Direct,medium consistency
  • TYPE 2:indirect,soft consistency

COMPOSITION:
  • Base -paraffin(60%)
  • Modifier -carnauba -25%
  • Ceresin-10%
  • Beeswax-5%
  • gum dammar-1%
  • colouring agent-<1%

  • Modifiers are added as paraffin has low strength ,properties to flakiness,highest coefficient of thermal expansion -greater distortion

  • carnauba ,gum damar:increases hardness,decreased flow ,improves smooth surface glossiness







PROPERTIES:

1)COEFFICIENT OF THERMAL EXPANSION:
  • Paraffin:350*10 to the power -6 degree celsius
  • Type 1 wax 25-37 degree celsius -maximum
  • permissible linear change is 0.6%
  • Cooling 37-25 degree celsius -permisible contraction 0.35%
2)FLOW:

  • Minimal flow -permit wax carving/pattern,permit easy removal 
3)RESIDUAL STRESS:
  • Reason for distortion
  • Wax has to be handled at high temperature
  • Sooner wax pattern invested minimal residual stress





AIM OF THIS POST:

HELLO,hope you all are doing good ,
Today we started with a small introduction about dental waxes,classification and we also studied in detail about inlay wax .aim of this post to give a clear outline picture of dental waxes and in detail about inlay ,On request of stencildent family member we have posted this,if you find this helpful and if you want to suggest us topics then do make sure  to follow us on our instagram handle :stencildent .Do let me know your valuable feedback in the comment section as this would motivate me to post more such content 

CONTACT DETAILS:

EMAIL:stencildent@gmail.com
INSTAGRAM:stencildent 

                               THANK YOU 

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