مجله دانشکده دندان‌پزشکی اصفهان

ﻣﻴﺰان آزاد ﺷﺪن ﻛﺒﺎﻟﺖ از آﻟﻴﺎژ ﻛﺮوم ﻛﺒﺎﻟﺖ در دو دﻣﺎى ﻣﺨﺘﻠﻒ اﻟﻜﺘﺮوﭘﺎﻟﻴﺶ ﺑﻪ روش اﺳﭙﻜﺘﺮوﻓﻮﺗﻮﻣﺘﺮى ﺑﺎ ﺟﺬب اﺗﻤﻲ

نوع مقاله : مقاله‌های پژوهشی

چکیده

ﻣﻘﺪﻣﻪ: ﻓﻠﺰات ﺑﻪ ﻃﻮر وﺳﻴﻌﻲ در ﻣﻮاد ﺗﺮﻣﻴﻤﻲ ﻣﺴﺘﻘﻴﻢ و ﻏﻴﺮﻣﺴﺘﻘﻴﻢ در ﭘﺮوﺗﺰ و در ارﺗﻮدﻧﺴﻲ اﺳﺘﻔﺎده ﻣﻲﺷﻮﻧﺪ. ﺳﺎزﮔﺎرى زﻳﺴﺘﻲ اﻳﻦ ﻓﻠﺰات ﺑﻪ ﻃﺒﻴﻌﺖ ﺷﻴﻤﻴﺎﻳﻲ آنﻫﺎ، ﻣﻘﺪار ﻳﻮن آزاد ﺷﺪه و ﻃﻮل ﻣﺪت ﺗﻤﺎس اﻳﻦ ﻓﻠﺰات واﺑﺴﺘﻪ اﺳﺖ. ﻫﺪف از اﻳﻦ ﻣﻄﺎﻟﻌﻪ، ﺑﺮرﺳﻲ اﺛﺮ ﺗﻔﺎوت دﻣﺎى اﻟﻜﺘﺮوﭘﺎﻟﻴﺶ ﺑﺮ روى ﻣﻴﺰان آزادﺳﺎزى ﻋﻨﺼﺮ ﻛﺒﺎﻟﺖ از آﻟﻴﺎژ ﻛﺮوم ﻛﺒﺎﻟﺖ بود.
ﻣﻮاد و روشﻫﺎ: در اﻳﻦ ﻣﻄﺎﻟﻌﻪ‌ی آزﻣﺎﻳﺸﮕﺎﻫﻲ، ٢٤ اﻟﮕﻮى ﻣﻮﻣﻲ ﺑﻪ ﻗﻄﺮ ١٥ و ﺿﺨﺎﻣﺖ ١ ﻣﻴﻠﻲﻣﺘﺮ ﺑﺮﻳﺪه ﺷﺪ. ﺳﭙﺲ ﻧﻤﻮﻧﻪﻫﺎ اﺳﭙﺮوﮔﺬارى ﺷﺪ و ﺳﻴﻠﻨﺪرﮔﺬارى، ﺣﺬف ﻣﻮم و ﻛﺴﺘﻴﻨﮓ ﺑﺮاى رﻳﺨﺘﻦ آﻟﻴﺎژ اﻧﺠﺎم ﺷﺪ. ﻧﻤﻮﻧﻪﻫﺎی ﻓﻠﺰى ﺑﺎ اﻛﺴﻴﺪ آﻟﻮﻣﻴﻨﻴﻮم ﺳﻨﺪ ﺑﻼﺳﺖ و ﭘﺮداﺧﺖ ﺷﺪ و ﺑﻪ ﺻﻮرت ﺗﺼﺎدﻓﻲ در دو ﮔﺮوه ١٢‌ﺗﺎﻳﻲ در دو دﻣﺎى ٤٥ و ٥٥ اﻟﻜﺘﺮوﭘﺎﻟﻴﺶ ﺷﺪ. ﻧﻤﻮﻧﻪ‌ﻫﺎ در ﻣﺪت زﻣﺎن ١٥ و ٣٠ روز ﺑﺮاى ارزیابی ﻋﻨﺼﺮ ﻛﺒﺎﻟﺖ ﺑﻪ دﺳﺘﮕﺎه اﺳﭙﻜﺘﺮوﻓﻮﺗﻮﻣﺘﺮى ﺟﺬب اﺗﻤﻲ ﻓﺮﺳﺘﺎده ﺷﺪ. دادهﻫﺎ ﺑﺎ آزﻣﻮن‌ﻫﺎى آﻣﺎرى t-test و Paired t-test ﺗﺠﺰﻳﻪ و ﺗﺤﻠﻴﻞ ﺷﺪﻧﺪ (0/05 = α).
ﻳﺎﻓﺘﻪ‌ﻫﺎ: ﻣﻴﺎﻧﮕﻴﻦ آزاد ﺷﺪن ﻛﺒﺎﻟﺖ از آﻟﻴﺎژ ﻛﺮوم ﻛﺒﺎﻟﺖ ﻫﻢ در دﻣﺎى ٤٥ و ﻫﻢ در دﻣﺎى ٥٥ درﺟﻪ‌ی ﺳﺎﻧﺘﻲ‌ﮔﺮاد در روز ٣٠ ﺑﻴﺸﺘﺮ از ١٥ ﺑﻮد و اﻳﻦ اﺧﺘﻼف در دﻣﺎى ٤٥ درﺟﻪ ﻣﻌﻨﻲ‌دار ﺑﻮد (0/036 = p value). در ﺣﺎﻟﻲ ﻛﻪ در دﻣﺎى ٥٥ ﻣﻌﻨﻲدار ﻧﺒﻮد (0/0754 = p value). در ﻣﻘﺎﻳﺴﻪ‌ی ﻣﻴﺰان آزاد ﺷﺪن ﻳﻮن در دو دﻣﺎى ٤٥ و ٥٥ درﺟﻪ‌ی ﺳﺎﻧﺘﻲ‌ﮔﺮاد، اﺧﺘﻼف اﻳﻦ دو در روز ١٥ و روز ٣٠ ﻣﻌﻨﻲدار ﻧﺒﻮد (0/0754 = p value).
ﻧﺘﻴﺠﻪﮔﻴﺮى: ﻣﻴﺰان آزاد ﺷﺪن ﻋﻨﺼﺮ ﻛﺒﺎﻟﺖ از آﻟﻴﺎژ ﻛﺮوم- ﻛﺒﺎﻟﺖ در دﻣﺎى ٤٥ درﺟﻪ، ﺑﺎﻋﺚ آزاد ﺷﺪن ﻳﻮن ﻛﻤﺘﺮى ﻧﺴﺒﺖ ﺑﻪ دﻣﺎى ٥٥ درﺟﻪ، ﺑﻪ ﻣﺮور زﻣﺎن ﻣﻲ‌ﺷﻮد.
کلید واژه‌ها: ﻛﺮوژن، آﻟﻴﺎژ، اﺳﭙﻜﺘﺮوﻓﻮﺗﻮﻣﺘﺮى ﺟﺬب اﺗﻤﻲ، اﻟﻜﺘﺮوﭘﺎﻟﻴﺶ

عنوان مقاله [English]

Comparison of Two Different Electro Polish Temperature on Cobalt Ion Release of Chromium Cobalt Alloy in Artificial Saliva with Atomic Absorption Spectrophotometry

چکیده [English]

Introduction: Metals are widely used in direct and indirect restorative materials, both in prosthetics and orthodontics. The biocompatibility of these metals depends on their chemical nature, the number of ions released, and the period of contact of these metals. This study aims to compare two different electropolish temperatures on the release of cobalt ion from chromium-cobalt alloy.
Materials and methods: In this experimental study, 24 wax patterns were cut in the form of a circle with a diameter of 15 mm and a thickness of 1 mm. Then, the samples were sprued and invested. Burn out and casting were used to cast the alloy. The samples were sandblasted and polished with aluminum oxide. They were randomly divided into two 12-number groups and electropolished at 45° and 55° C. Samples were placed in artificial saliva and sent to atomic absorption spectrophotometer for 15 and 30 days to read the cobalt. Data were then analyzed by Independent t-test and Paired t-test (p value = 0.05).
Results: The average release of cobalt from chromium cobalt alloy on the 30th day was higher than the 15th day at both 45° C and 55° C. This difference was significant at 45° C (p value = 0.036) while not significant at 55 ° C (p value = 0.0754). Regarding the comparison of the ion release at 45 ° and 55° C, the difference was not significant on the 15th day (p value = 0.067) and 30th day (p value = 0.0754).
Conclusion: The amount of cobalt ions released from the cobalt-chromium alloy at 45° C is fewer than at 55° C over time.
Keywords: Corrosion, Alloys, Atomic absorption spectrophotometry

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مجله دانشکده دندان‌پزشکی اصفهان
دوره 18، شماره 3 - شماره پیاپی 3
مهر 1401