Section 042 Acrylic Resins

8/13/2019 Section 042 Acrylic Resins

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Section 42 - Acrylic Resins

Handout

Abstracts

Quiz

001. Brauer, G. Dental Applications of Polymers: A Reie!. "ADA #2:11$1-11$%, 1&''.

002. Peyton, (.A. an) Ant*ony, D.+. aluation of Dentures Processe) y Different ec*ni/ues.

" Prost*et Dent 1:2'&-2%2, 1&'.

00. Goo)in), R.". an) Sc*ulte, R.. Dimensional Accuracy of Pour Acrylic Resin an)

onentional Processin3 of ol) urin3 Acrylic Resin Bases. " Prost*et Dent 24:''2-''%, 1.

004. orton, . an) P*illips, R.5. +eat-Release) Stress in Acrylic Dentures. " Prost*et Dent42:2-2', 1&.

00$. 5inler, S. an) 6ernon, +. olorin3 Acrylic Denture Base Resins. " Prost*et Dent 40:4-#,

1%

00'. Pa3niano, R. et al. inear Dimensional *an3e of Acrylic Resins use) in t*e (arication ofustom rays. " Prost*et Dent 4#:2#&-2%, 1&%2.

00#. Beyli, 7.S. an) 6on(raun*ofer, ".A. Repair of (racture) Acrylic Resin." Prost*et Dent

44:4-$0, 1&%0.

00%. 5eaer, R.. an) Goeel, 5.7.Reactions to Acrylic Resin Dental Prost*eses." Prost*etDent 4:1%-142, 1&%0.

00&. ec*ner, S.8. an) autensc*la3er, .P. Processin3 *an3es in 7a9illary omplete

Dentures." Prost*et Dent $2:20-24, 1&%4.

010. Dues, B.S. et al. A aoratory Stu)y of *an3es in 6ertical Dimension sin3 a

ompression 7ol)in3 an) a Pour Resin." Prost*et Dent $:''#-''&, 1&%$.

011. Barco, 7.. et al. *e ffect of Relinin3 on t*e Accuracy an) staility of 7a9illary

omplete Dentures-An in-6itro an) ;n-6io stu)y. " Prost*et Dent 42:1#-22, 1&.

012. Poly


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014. Peyton, (.A. +istory of Resins in Dentistry. D>A 1&:211,1$.

01$. aamata, . an) Sectos, ". Resin Denture Bases: Reie! of Accuracy an) Polymeri


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42-002. *eyton, +.A. and Antony, D.H. "aluation of dentures processed by different

tecniues. $ *rostet Dent 1/!2)(-2'2, 1()/.

5*en ealuatin3 t*e accuracy of )enture ases, it !as foun) t*at self-cure) acrylics !eremost accurate follo!e) y cast c*romium-coalt, *eat-cure) acrylics an) t*en in?ecte) acrylics.

*e clinical importance of t*ese small )iscrepancies is not no!n as all seem to a)apt in t*e oralsettin3. ;nternal stresses are create) in t*e *eat-curin3 process an) it is eliee) t*at !*en t*ese

)enture ases are su?ecte) to *eat a3ain, t*e stresses are release). *is accounts for t*e !arpa3enote) !*en )enture ases !ere repaire) usin3 a *eat-cure) resin. Self-curin3 acrylic )i) not

e9*iit !arpa3e an) s*oul) e t*e met*o) use) for )enture repair.

42-00/. Goodind, .$. and culte, .3. Diensional accuracy of pour acrylic resin and

con"entional processin of cold curin acrylic resin bases. $ *rostet Dent 24!))2-))',

1(%0.

Denture ases forme) y t*e pour tec*ni/ue e9*iite) more s*rina3e t*an t*e ases forme)

y t*e col)-cure met*o). Bot* types of ases )i) )emonstrate some s*rina3e ut it is not no!nif t*e amount of )imensional c*an3e !ill e si3nificant clinically. Stora3e of t*e t!o types of

acrylic ases in !ater for oer si9 mont*s reeale) no si3nificant )imensional c*an3e.

42-004. 5orton, 5. and *illips, .6. Heat-released stress in acrylic dentures. $ *rostet

Dent 42!2/-2), 1(%(.

Su?ectin3 acrylic )enture ases to !ater temperatures oer &0 )e3rees )i) *ae si3nificantoserale c*an3es in )imension t*at may effect t*e fit of t*e )enture. *e )imensional c*an3es,

*o!eer, are more comple9 an) are not uniform as one !oul) e9pect. Grin)in3 on a )enture

ase !it* cari)e urs an) especially !it* lat*e )iss pro)uce) e9cessiely *i3* temperatures.

Cer*eatin3 een small re3ions of t*e )enture can cause locali


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Purpose:o ascertain t*e linear )imensional c*an3e of four col)-curin3 acrylic resin custom tray

materials.

7et*o)s 7aterials: oe ray, Cntray, (astray an) +y3on !ere measure) for )imensionalc*an3e e3innin3 !it* 1$ minutes after initiation of mi9in3. ontinuous c*an3e !as recor)e)

oer a 24-*our perio).

Results: *e most rapi) linear )imensional s*rina3e of all materials occurre) in t*e first *ourafter mi9in3. +y3on un)er!ent t*e least amount of linear )imensional c*an3e )urin3 t*e initial

sta3es of t*e test, as !ell as oer t*e remain)er of t*e testin3 perio). ;t reac*e) &0E of its total

24-*our c*an3e at 10 1F2 *ours from t*e time of mi9in3. oe ray un)er!ent t*e 3reatestamount of )imensional c*an3e in t*e early sta3es of t*e test, an) suse/uently oer t*e 24-*our

perio). *e material reac*e) &0E of its total 24-*our c*an3e !it*in 2 *ours from t*e time of

mi9in3.

onclusions: ;)eally, !aitin3 at least & *ours after farication of a custom tray allo!s t*ematerials teste) to ecome comparatiely stale. ;f it is necessary to use a tray soon after

farication, follo!in3 *ar)enin3, it s*oul) e place) in oilin3 !ater for $ minutes an) t*en

coole) to room temperature. 5it* any met*o) t*e impression s*oul) e poure) as soon as

possile to minimi


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of t*ese symptoms inclu)e trauma from ill-fittin3 )entures, local c*emical irritation cause) y

acrylic resin or its constituents, or ot*er systemic an) oral )iseases not relate) to acrylic resin.

;ll-fittin3 or poorly a)?uste) )entures are t*e most common cause of )enture )iscomfort. 7et*ylmet*acrylate monomer *as also een s*o!n to e a primary irritant, elicitin3 a locali


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Purpose: aluate t*e c*an3es in ertical )imension of complete )entures y comparin3

compression mol)in3 !it* a pour resin tec*ni/ue.

7aterials 7et*o)s: 0 sets of complete )entures !ere ealuate) for eac* cate3ory.Results: *e increase in ertical )imension !as '.$ times 3reater for t*e pour resin tec*ni/ue

t*an for t*e compression mol)in3 tec*ni/ue.

42-011. Barco, 8.;. et al. ;e effect of relinin on te accuracy and stability of a:illary

coplete dentures! An in-"itro and in-"i"o study. $ *rostet Dent 42!1%-22, 1(%(.

Purpose: o )etermine if *eat cure) ma9illary )enture ase after relinin3 is more accurate t*an

!it*out an) secon)arily if an improement in t*e fit of t*e or)er ac*iee) y t*e relinin3

proce)ure is reflecte) in t*e staility of t*e )enture un)er function.Discussion: *e la )ata clearly in)icate a etter fittin3 )enture can e ac*iee) y relinin3 t*e

*eat-cure) )enture !it* autopolymeri


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7aterials 7et*o)s: (orty nicel-c*rome specimens, 1 cm s/uare an) 1.'mm t*ic, !ere cast.

!o 3roups of metal specimens !ere prepare): 20 for electrolytic etc*in3 an) 20 !it* ea)

retention. *e specimens !ere pace) !it* ucitone 1&&, cure), recoere), an) store) in)istille) !ater prior to on) testin3.

Results: *e etc*e) tensile on) is nearly .$ times 3reater t*an t*e stren3t* of t*e on) !it* t*e

ea)s. *e tensile fracture for t*e etc*e) specimens !as one of a co*esie failure of t*e acrylicresin @failure !it*in t*e poly@met*yl met*acrylate. *e ea) specimens faile) a)*esiely at t*e

resin-metal interface.

onclusions: Acrylic resin retention *as al!ays een a prolem !*ere interarc* space isminimal. 7icroscopic etc*e) retention preseres t*e ma9imum remainin3 space for placement of

artificial teet*.

42-014. *eyton, +.A. History of resins in dentistry. D3>A 1(!211,1(%&.

Purpose: Present t*e *istory of )enture ase materials

Prior to 1%40: Dentures ma)e of naturally occurrin3 materials. +ar)!oo), iory one an)natural teet* *el) in y scre!s. Porcelain teet* ma)e in America y 1%2$. o )ate !as

most si3nificant a)ance.

1%40-1&40: ;n 1%$$ 6ulcanite )enture ases populari


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Purpose: ;nesti3ate t*e rapi) curin3 cycle in terms of porosity, transparency, resi)ual monomer

an) mec*anical properties to )etermine !*ic* constituents can e controlle) to minimi


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42-01(. losber, .. and Goodacre, 3.$. 8icro#a"e enery *olyerization of poly

@etyl etacrylate denture base resin. =nt $ *rostodont 2!4&/, 1('(.

Purpose:ompare t*e use of micro!ae ener3y !it* a *ot !ater at* for polymeri


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onclusions: ria) 6 )enture material *a) superior transerse stren3t* an) surface *ar)ness

t*an conentional )enture ase acrylic resin, ut s*o!e) si3nificantly 3reater stainin3 t*an t*e

acrylic resin material.

42-021. Hayaa#a, =. et al. *roperties of a ne# lit polyerizin relinin aterial. =nt $

*rostodont /!2%'-/'4, 1((0.

Purpose: o ealuate a ne!ly )eelope) li3*t-polymeri


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6. 5*at type of reporte) oral tissue reactions *ae een associate) !it* acrylic resin

prost*esesH

6;. 5*at materials *ae een use) in t*e colorin3 of acrylic resinH

6;;. +o! )oes relinin3 effect t*e accuracy an) staility of t*e ma9illary complete )enture !*enprocesse) y:

1. +eat curin3H

2. Autopolymeriame four types of transitional ?oints reporte) superior to t*e tra)itional utt ?oint !*en

repairin3 an acrylic aseH

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Section 042 Acrylic Resins