Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing Units
Background and Aim : Excessive heat produced while curing of light-activated dental restorations may cause irreversible damage to dental pulp. The Aims of this study wereto measure the temperature rise(TR) induced by two different light curing units and to evaluate the relathionship between the meas...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Islamic Dental Association of Iran
2012-10-01
|
| Series: | Journal of Islamic Dental Association of Iran |
| Subjects: | |
| Online Access: | http://jidai.ir/browse.php?a_code=A-10-1-627&slc_lang=en&sid=1 |
| _version_ | 1811236484160684032 |
|---|---|
| author | Mehrdad Barkatayn Mohammad reza Malekipoor Samaneh Alaei Maryam Kavoosi |
| author_facet | Mehrdad Barkatayn Mohammad reza Malekipoor Samaneh Alaei Maryam Kavoosi |
| author_sort | Mehrdad Barkatayn |
| collection | DOAJ |
| description | Background and Aim : Excessive heat produced while curing of light-activated dental restorations may cause irreversible damage to dental pulp. The Aims of this study wereto measure the temperature rise(TR) induced by two different light curing units and to evaluate the relathionship between the measured TR in dentin discs of different thicknesses and different distances of light guide tips from dentin disc .
Materials and Methods : In this experimental study, Quartz-Tungsten-Halogen (QTH) (400 ) and Light-Emitting Diode (LED) systems (1500 ) were used as the curing units. Dentin discs of 0.5, 1.0 and 1.5 mm thicknesses were prepared. Distances of 1,2 and 3 mm from the tip of the light guide and dentin discs were set. Temperatures were recorded using a digital laser thermometer. Data were statistically analyzed using two-way ANOVA, Duncan and T-test .
Results: Results showed that both dentin thickness and distance between tip of curing units and dentin disks had significant effects on temperature rise in both curing units (P<0.001 ).
Conclusion : LED produced the highest and the QTH the lowest TR for all tested conditions. Reduced thermal insults were related to increased dentin thickness, increased distance between the light guide tip and dentin, and decreased energy emitted from the light-curing unit . |
| first_indexed | 2024-04-12T12:09:25Z |
| format | Article |
| id | doaj.art-c4d2cb10a1a64683baa322e0768b2553 |
| institution | Directory Open Access Journal |
| issn | 2383-3041 2383-3041 |
| language | English |
| last_indexed | 2024-04-12T12:09:25Z |
| publishDate | 2012-10-01 |
| publisher | Islamic Dental Association of Iran |
| record_format | Article |
| series | Journal of Islamic Dental Association of Iran |
| spelling | doaj.art-c4d2cb10a1a64683baa322e0768b25532022-12-22T03:33:37ZengIslamic Dental Association of IranJournal of Islamic Dental Association of Iran2383-30412383-30412012-10-01244171176Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing UnitsMehrdad Barkatayn0Mohammad reza Malekipoor1Samaneh Alaei2Maryam Kavoosi3 Assistant Professor, Department of Operative Dentistry, School of Dentistry, Azad University. Khorasgan Branch, Iran Assistant Professor, Department of Operative Dentistry, School of Dentistry, Azad University. Khorasgan Branch, Iran Postgraduate Student, Department of Operative Dentistry, School of Dentistry, Azad University. Khorasgan Branch, Iran Dentist Background and Aim : Excessive heat produced while curing of light-activated dental restorations may cause irreversible damage to dental pulp. The Aims of this study wereto measure the temperature rise(TR) induced by two different light curing units and to evaluate the relathionship between the measured TR in dentin discs of different thicknesses and different distances of light guide tips from dentin disc . Materials and Methods : In this experimental study, Quartz-Tungsten-Halogen (QTH) (400 ) and Light-Emitting Diode (LED) systems (1500 ) were used as the curing units. Dentin discs of 0.5, 1.0 and 1.5 mm thicknesses were prepared. Distances of 1,2 and 3 mm from the tip of the light guide and dentin discs were set. Temperatures were recorded using a digital laser thermometer. Data were statistically analyzed using two-way ANOVA, Duncan and T-test . Results: Results showed that both dentin thickness and distance between tip of curing units and dentin disks had significant effects on temperature rise in both curing units (P<0.001 ). Conclusion : LED produced the highest and the QTH the lowest TR for all tested conditions. Reduced thermal insults were related to increased dentin thickness, increased distance between the light guide tip and dentin, and decreased energy emitted from the light-curing unit .http://jidai.ir/browse.php?a_code=A-10-1-627&slc_lang=en&sid=1TemperatureCuring lightsDentin |
| spellingShingle | Mehrdad Barkatayn Mohammad reza Malekipoor Samaneh Alaei Maryam Kavoosi Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing Units Journal of Islamic Dental Association of Iran Temperature Curing lights Dentin |
| title | Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing Units |
| title_full | Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing Units |
| title_fullStr | Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing Units |
| title_full_unstemmed | Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing Units |
| title_short | Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing Units |
| title_sort | comparison of temperature changes through dentin discs with different thicknesses and different distances of light curing tip by two different light curing units |
| topic | Temperature Curing lights Dentin |
| url | http://jidai.ir/browse.php?a_code=A-10-1-627&slc_lang=en&sid=1 |
| work_keys_str_mv | AT mehrdadbarkatayn comparisonoftemperaturechangesthroughdentindiscswithdifferentthicknessesanddifferentdistancesoflightcuringtipbytwodifferentlightcuringunits AT mohammadrezamalekipoor comparisonoftemperaturechangesthroughdentindiscswithdifferentthicknessesanddifferentdistancesoflightcuringtipbytwodifferentlightcuringunits AT samanehalaei comparisonoftemperaturechangesthroughdentindiscswithdifferentthicknessesanddifferentdistancesoflightcuringtipbytwodifferentlightcuringunits AT maryamkavoosi comparisonoftemperaturechangesthroughdentindiscswithdifferentthicknessesanddifferentdistancesoflightcuringtipbytwodifferentlightcuringunits |