بررسی تاثیر دستکش های لاتکس و نیتریل بر پلیمریزاسیون مواد قالبگیری الاستومریک

ﻣﻘﺪﻣﻪ: اﺳﺘﻔﺎده از دﺳﺘﮑﺶﻫﺎی ﻻﺗﮑﺲ راه ﺣﻠﯽ اﺳﺎﺳﯽ ﺑﺮای ﺷﮑﺴﺘﻦ زﻧﺠﯿﺮه ﻋﻔﻮﻧﺖ اﺳﺖ. دﺳﺘﮑﺶﻫﺎی ﻧﯿﺘﺮﯾﻞ ﺑﻪ ﻋﻠﺖ ﺑﺮوز آﻟﺮژی ﮐﻤﺘﺮ ﻧﺴﺒﺖ ﺑﻪ دﺳﺘﮑﺶﻫﺎی ﻻﺗﮑﺲ، ﺑﻪ ﻋﻨﻮان ﯾﮏ ﺟﺎﯾﮕﺰﯾﻦ ﻣﻨﺎﺳﺐ در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﻣﯽﺷﻮﻧﺪ. ﺟﻠﻮﮔﯿﺮی از ﭘﻠﯿﻤﺮﯾﺰاﺳﯿﻮن ﺳﻄﺤﯽ ﻣﻮاد ﻗﺎﻟﺒﮕﯿﺮی ﺳﯿﻠﯿﮑﻮن اﻓﺰاﯾﺸﯽ ﺑﻪ ﻋﻨﻮان ﯾﮏ ﻋﺎﻣﻞ ﻣﺸﮑﻞ ﺳﺎز ﻣﻬﻢ در ﺳﺎﺧﺖ رﺳﺘﻮرﯾﺸﻦﻫﺎی ﻏﯿﺮﻣﺴﺘﻘﯿﻢ ﺷﻨﺎﺧﺘﻪ ﺷﺪه اﺳﺖ. اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﺑﺮای ﺗﻌﯿﯿﻦ اﺛﺮ دﺳﺘﮑﺶﻫﺎی ﻻﺗﮑﺲ و ﻧﯿﺘﺮﯾﻞ ﺑﺮ ﭘﻠﯿﻤﺮﯾﺰاﺳﯿﻮن ﭘﻮﺗﯽ ﻣﻮاد اﻻﺳﺘﻮﻣﺮی ﻃﺮاﺣﯽ ﺷﺪه اﺳﺖ. ﻣﻮاد و روشﻫﺎ: اﯾﻦ ﻣﻄﺎﻟﻌﻪ in vitro ، ﺷﺎﻣﻞ 120 ﻧﻤﻮﻧﻪ از دو ﭘﻮﺗﯽ ﺳﯿﻠﯿﮑﻮن اﻓﺰاﯾﺸﯽ panasil , zhermack و ﯾﮏ ﭘﻮﺗﯽ ﺳﯿﻠﯿﮑﻮن speedex ﺗﺮاﮐﻤﯽ ﺑﻮد. ﭘﮋوﻫﺸﮕﺮ اول ﺑﺎ دﺳﺖﻫﺎی ﺑﺪون دﺳﺘﮑﺶ، ﭘﻮﺗﯽ ﺑﯿﺲ و ﮐﺎﺗﺎﻟﯿﺴﺖ را ﻣﺨﻠﻮط ﮐﺮد و ﭘﮋوﻫﺸﮕﺮ دوم ﺑﻪ ﺗﺮﺗﯿﺐ زﯾﺮ ﻧﻤﻮﻧﻪﻫﺎ را در 4 ﮔﺮوه در دﻣﺎی اﺗﺎق ﺑﺮ روی اﺳﻠﺐ ﺷﯿﺸﻪای ﺗﻤﯿﺰ ﺷﺪه ﺑﺎ اﻟﮑﻞ ﻗﺮار داد: ﺑﺎ دﺳﺖﻫﺎی ﺷﺴﺘﻪ ﺷﺪه ﮔﺮوه ﮐﻨﺘﺮل ، ﺑﺎ دﺳﺘﮑﺶ ﻻﺗﮑﺲ ﭘﻮدردار، ﻻﺗﮑﺲ ﺑﺪون ﭘﻮدر و ﻧﯿﺘﺮﯾﻞ. ﻣﯿﺰان ﭘﻠﯿﻤﺮﯾﺰاﺳﯿﻮن ﺑﻪ روش ﻣﺸﺎﻫﺪهای ارزﯾﺎﺑﯽ و ﺑﻪ دو ﮔﺮوه ﭘﻠﯿﻤﺮﯾﺰه ﺷﺪه و ﭘﻠﯿﻤﺮﯾﺰه ﻧﺸﺪه ﺗﻘﺴﯿﻢﺑﻨﺪی ﺷﺪﻧﺪ. دادهﻫﺎ ﺑﺎ ﺗﺴﺖ دﻗﯿﻖ ﻓﯿﺸﺮ آﻧﺎﻟﯿﺰ ﺷﺪﻧﺪ 0/05=α . ﯾﺎﻓﺘﻪﻫﺎ: ﭘﻠﯿﻤﯿﺮﯾﺰاﺳﯿﻮن ﭘﻮﺗﯽ اﻓﺰاﯾﺶ p=0/43 panasil و p=0/13 zhermack ﺗﻔﺎوت ﻣﻌﻨﯽ داری ﻧﺴﺒﺖ ﺑﻪ ﻧﻮع ﺗﺮاﮐﻤﯽ speedex ﻧﺪاﺷﺖ. دﺳﺘﮑﺶ ﻻﺗﮑﺲ ﭘﻮدردار ﺑﻪ ﻃﻮر ﻣﻌﻨﺎ داری ﻧﺴﺒﺖ ﺑﻪ ﮔﺮوه ﮐﻨﺘﺮل 98,5% ، ﺷﺎﻧﺲ ﭘﻠﯿﻤﺮﯾﺰاﺳﯿﻮن ﭘﻮﺗﯽ را ﮐﺎﻫﺶ داد 0/0001=p وﻟﯽ دﺳﺘﮑﺶ ﻫﺎی ﻧﯿﺘﺮﯾﻞ p=1 و ﻻﺗﮑﺲ ﺑﺪون ﭘﻮدر p=0/34 ﺗﻔﺎوت ﻣﻌﻨﺎداری از ﻧﻈﺮ ﻣﯿﺰان ﭘﻠﯿﻤﺮﯾﺰاﺳﯿﻮن ﭘﻮﺗﯽ ﺑﺎ ﮔﺮوه ﮐﻨﺘﺮل ﻧﺪاﺷﺖ. ﻧﺘﯿﺠﻪ ﮔﯿﺮی: اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ اﺳﺘﻔﺎده ازدﺳﺘﮑﺶﻫﺎی ﻻﺗﮑﺲ ﭘﻮدری در ﭘﺮوﺳﻪ ﻗﺎﻟﺐﮔﯿﺮی ﺑﺎ ﻣﻮاد ﺳﯿﻠﯿﮑﻮن ﭘﻮﺗﯽ ﺑﺎﯾﺪ ﻣﻨﻊ ﻣﺼﺮف داﺷﺘﻪ ﺑﺎﺷﺪ و اﺳﺘﻔﺎده از دﺳﺘﮑﺶﻫﺎی ﻻﺗﮑﺲ ﺑﺪون ﭘﻮدر ﯾﺎ ﻧﯿﺘﺮﯾﻞ در ﻫﻨﮕﺎم اﺳﺘﻔﺎده از ﻣﻮاد ﻗﺎﻟﺐﮔﯿﺮی اﻻﺳﺘﻮﻣﺮی ﺑﺎﯾﺪ ﻣﻮرد ﺗﺄﮐﯿﺪ ﻗﺮار ﮔﯿﺮد.

evaluation of the effect of latex and nitrile gloves on polymerization of elastomeric impression materials

the use of latex gloves is essential to proper infection control. due to the relatively high incidence of allergies to latex gloves, nitrile gloves are considered as an alternative. surface inhibition of polymerization of polyvinyl siloxane impression materials has been identified as a significant complicating factor in the fabrication of indirect restorations. this study has been designed to determine the effect of latex and nitrile gloves on polymerization inhibition of elastomeric impression putties.materials and methods: this in vitro study included a total of 120 specimens of two additional silicone (ponasil, zhermack) and one condensation silicone putties (speedex). a single operator mixed the base and catalyst of putties with bare hands and another operator placed the prepared specimen on a clean alcohol-treated slab at room temperature in 4 groups as follows: by washed hands (control group), powdered latex, powder-free latex, and nitrile gloves. the extent of polymerization was evaluated by observation and divided into two groups: inhibited and non-inhibited. data were analyzed by fisher's exact test (α = 0. 05).results: in the polymerization of additional silicone putties including panasil (p= 0.43) and zhermack (p=0.13) did not show a significant difference with condensational speedex putty. moreover, the powdered latex glove decreased the chance of polymerization of silicone putties by 98.5% (p=0.001). however, powder-free latex (p=1), and nitril gloves (p=0.34) did not show a significant difference in polymerization of putty silicones compared to control group.conclusion: this study shows that the use of powdered latex gloves during impression-making procedures with silicone putties should be contraindicated and the use of nitrile or powder-free latex gloves should be emphasized when working with elastomeric impression materials