Mechanical properties of carving wax with various Ca-bentolite filter composition

• Main Authors: Widjijono Widjijono, Purwanto Agustiono, Dyah Irnawati
• Format: Article
• Language: English
• Published: Universitas Airlangga 2009-09-01
• Series: Dental Journal: Majalah Kedokteran Gigi
• Subjects: carving wax; Ca-bentonite; melting point; hardness; thermal expansion
• Online Access: http://e-journal.unair.ac.id/index.php/MKG/article/view/947

<span style="font-family: Tribune-Bold; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;"><strong>Background</strong><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>: The carving wax is used as a medium in dental anatomy study. This wax composes of many waxes and sometimes </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>a filler is added. Carving wax is not sold in Indonesian market. Whereas the gradients of carving wax such as beeswax, paraffin and </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>bentonite are abundant in Indonesia. Based on that fact, to make high quality and standard,the exact composition if this carving wax </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>should be known. </em><span style="font-family: Tribune-Bold; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;"><strong>Purpose</strong><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>: The aim of this study was to investigate the effect of carving wax composition with Ca-bentonite filler on </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>the melting point, hardness, and thermal expansion. </em><span style="font-family: Tribune-Bold; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;"><strong>Methods</strong><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>: Five carving wax compositions were made with paraffin, Ca-bentonite, </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>carnauba wax, and beeswax in ratio (% weight): 50:20:25:5 (KI), 55:15:25:5 (KII), 60:10:25:5 (KIII), 65:5:25:5 (KIV), 70:0:25:5(KV). </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>All components were melted, then poured into the melting point, hardness, and thermal expansion moulds (n = 5). Three carving wax </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>properties were tested: melting point by melting point apparatus; hardness by penetrometer; thermal expansion by digital sliding </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>caliper. The data were analyzed statistically using One-Way ANOVA and LSD</em><span style="font-family: Tribune-Italic; font-size: 7pt; color: #231f20; font-style: normal; font-variant: normal;"><em>0.05</em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>. </em><span style="font-family: Tribune-Bold; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;"><strong>Result</strong><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>: The Ca-bentonite addition influenced the </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>melting point and thermal expansion of carving wax with significant differences between KI and other groups (p &lt; 0.05). Ca-bentonite </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>addition influenced the carving wax hardness and the mean differences among the groups were significant (p &lt; 0.05). </em><span style="font-family: Tribune-Bold; font-size: 10pt; color: #231f20; font-style: normal; font-variant: normal;"><strong>Conclusion</strong><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>: </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>Ca-bentonite filler addition on the composition of carving wax influenced the physical and mechanical properties. The carving wax </em><span style="font-family: Tribune-Italic; font-size: 9pt; color: #231f20; font-style: normal; font-variant: normal;"><em>with high Ca-bentonite concentration had high melting point and hardness, but low thermal expansion.</em></span></span></span></span></span></span></span></span></span></span></span></span><br style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" /></span></span></span></span></span></span></span></span></span></span></span></span>