Various polymerization temperature on dimensional accuracy of orthodontic acrylic base plate

• Main Author: Elly Rusdiana (Author)
• Format: Book
• Published: Universitas Airlangga, 2007-12-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 1978-3728; 2442-9740; 10.20473/j.djmkg.v40.i4.p170-172
• Keywords: cold curing acrylic; dimension; polymerization; Dentistry; RK1-715
• Source: Dental Journal, Vol 40, Iss 4, Pp 170-172 (2007)

<span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>Cold curing acrylic is more porous, having more residual monomer and dimensional change. Physical property of cold curing </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>acrylic shows to have very small dimensional change resulted from imperfect polymerization process and if dimensional change occurs, </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>it would cause improper use of orthodontic appliance. Orthodontic acrylic base plate which is made of cold curing acrylic, in order to </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>achieve good result, it is suggested to use hydro flask or polyclav with water temperature 45</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">°<span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>-50</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">°<span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C and polyclav and pressure in 2-3 </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>atm during polymerization process. Even though cold curing acrylic could polymerization at room temperature, the purpose to use hydro </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>flask or polyclav is to reduce residual monomer and porosity. The purpose of the present study is to know the difference in dimensional </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>accuracy of orthodontic acrylic at various polymerization temperature. The samples of the study were 18 acrylic base plate sized 65 </em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">× <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>10 </em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">× <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>25 mm classified into 3 control groups with polymerization temperature at 30</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">° <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C, 40</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">° <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C and 50</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">° <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C. Measurement was done using </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>caliper in order to know dimensional accuracy of orthodontic acrylic. The measurement result was tabulated and One-Way ANOVA </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>test one was done with significant level 95%, the probability result 0,0055 was found which means there was significant difference </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>among each control group. LSD test showed that group I polymerization at 30</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">° <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C, group II polymerization at 40</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">° <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C, and group III </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>polymerization at 50</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">°<span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C there was significant difference. The conclusion of this study is : dimensional difference of orthodontic acrylic </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>base plate on polymerization at group I at 30</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">° <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C, group II at 40</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">° <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C, and group III at 50</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">° <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C water temperature and could achieve better </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>dimensional accuracy comparing with polymerization at 50</em><span style="font-family: TimesNewRomanPSMT; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;">° <span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>C.</em></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>