Effect of light guide tip diameter on the degree of conversion and depth of cure of bulk-fill composites

Zeynep Hale Keleş; Berna Tarım

Makale detayları

Effect of light guide tip diameter on the degree of conversion and depth of cure of bulk-fill composites

Yazarlar:

Zeynep Hale Keleş | Berna Tarım

Yayıncı:

Istanbul University

Ana Başlıklar:

Dentistry (Other)

Dergi:

European Oral Research Vol.59 Issue 2, pp.121-128

Belge Tipi:

Makale

Yayın Tarihi:

5/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001352461

pISSN:

2630-6158

Anahtar kelimeler:

Özet:

 Purpose: This study aimed to evaluate the effects of the light guide tip diameter on the degree of conversion, micro-hardness, and depth of cure of bulk-fill composites compared to a conventional composite. Materials and Methods: Layers of Tetric EvoCeram 2 mm, Tetric EvoCeram Bulk Fill 4 mm, SonicFill 2 5 mm were placed in 4 mm diameter molds and were cured with LED light curing unit having 138 or 134 mm diameter turbo light guide tips for 10 s with a total number of 60 samples n5. Then, specimens were stored in a dark and dry environment at 37C for 24 h, and Vickers micro-hardness values of the top and bottom surfaces of 30 specimens were measured. The other 30 specimens were pulverized, and the degree of conversion values of the specimens was measured with FTIR-ATR. The depth of cure was determined by proportioning the bottom surfaces micro hardness value to the top surfaces. Data were analyzed with the Shapiro-Wilks test, Students t-test, and Pearsons correlation analysis p  0.05. Results: The degree of conversion and the depth of cure of bulk-fill composites cured with 138 mm diameter tip were higher than those cured with 134 mm diameter tip p0.01. The degree of conversion of the bulk-fill composites applied in the layer thickness recommended by the manufacturer was below the clinically accepted rate of 55, and the depth of cure remained below 80. Conclusion: The curing of bulk-fill composites with light guide tips of different diameters affects the degree of conversion and the depth of the cure.

 Purpose: This study aimed to evaluate the effects of the light guide tip diameter on the degree of conversion, micro-hardness, and depth of cure of bulk-fill composites compared to a conventional composite. Materials and Methods: Layers of Tetric EvoCeram 2 mm, Tetric EvoCeram Bulk Fill 4 mm, SonicFill 2 5 mm were placed in 4 mm diameter molds and were cured with LED light curing unit having 138 or 134 mm diameter turbo light guide tips for 10 s with a total number of 60 samples n5. Then, specimens were stored in a dark and dry environment at 37C for 24 h, and Vickers micro-hardness values of the top and bottom surfaces of 30 specimens were measured. The other 30 specimens were pulverized, and the degree of conversion values of the specimens was measured with FTIR-ATR. The depth of cure was determined by proportioning the bottom surfaces micro hardness value to the top surfaces. Data were analyzed with the Shapiro-Wilks test, Students t-test, and Pearsons correlation analysis p  0.05. Results: The degree of conversion and the depth of cure of bulk-fill composites cured with 138 mm diameter tip were higher than those cured with 134 mm diameter tip p0.01. The degree of conversion of the bulk-fill composites applied in the layer thickness recommended by the manufacturer was below the clinically accepted rate of 55, and the depth of cure remained below 80. Conclusion: The curing of bulk-fill composites with light guide tips of different diameters affects the degree of conversion and the depth of the cure.

 Purpose: This study aimed to evaluate the effects of the light guide tip diameter on the degree of conversion, micro-hardness, and depth of cure of bulk-fill composites compared to a conventional composite. Materials and Methods: Layers of Tetric EvoCeram 2 mm, Tetric EvoCeram Bulk Fill 4 mm, SonicFill 2 5 mm were placed in 4 mm diameter molds and were cured with LED light curing unit having 138 or 134 mm diameter turbo light guide tips for 10 s with a total number of 60 samples n5. Then, specimens were stored in a dark and dry environment at 37C for 24 h, and Vickers micro-hardness values of the top and bottom surfaces of 30 specimens were measured. The other 30 specimens were pulverized, and the degree of conversion values of the specimens was measured with FTIR-ATR. The depth of cure was determined by proportioning the bottom surfaces micro hardness value to the top surfaces. Data were analyzed with the Shapiro-Wilks test, Students t-test, and Pearsons correlation analysis p  0.05. Results: The degree of conversion and the depth of cure of bulk-fill composites cured with 138 mm diameter tip were higher than those cured with 134 mm diameter tip p0.01. The degree of conversion of the bulk-fill composites applied in the layer thickness recommended by the manufacturer was below the clinically accepted rate of 55, and the depth of cure remained below 80. Conclusion: The curing of bulk-fill composites with light guide tips of different diameters affects the degree of conversion and the depth of the cure.

 Purpose: This study aimed to evaluate the effects of the light guide tip diameter on the degree of conversion, micro-hardness, and depth of cure of bulk-fill composites compared to a conventional composite. Materials and Methods: Layers of Tetric EvoCeram 2 mm, Tetric EvoCeram Bulk Fill 4 mm, SonicFill 2 5 mm were placed in 4 mm diameter molds and were cured with LED light curing unit having 138 or 134 mm diameter turbo light guide tips for 10 s with a total number of 60 samples n5. Then, specimens were stored in a dark and dry environment at 37C for 24 h, and Vickers micro-hardness values of the top and bottom surfaces of 30 specimens were measured. The other 30 specimens were pulverized, and the degree of conversion values of the specimens was measured with FTIR-ATR. The depth of cure was determined by proportioning the bottom surfaces micro hardness value to the top surfaces. Data were analyzed with the Shapiro-Wilks test, Students t-test, and Pearsons correlation analysis p  0.05. Results: The degree of conversion and the depth of cure of bulk-fill composites cured with 138 mm diameter tip were higher than those cured with 134 mm diameter tip p0.01. The degree of conversion of the bulk-fill composites applied in the layer thickness recommended by the manufacturer was below the clinically accepted rate of 55, and the depth of cure remained below 80. Conclusion: The curing of bulk-fill composites with light guide tips of different diameters affects the degree of conversion and the depth of the cure.

Makale detayları

Effect of light guide tip diameter on the degree of conversion and depth of cure of bulk-fill composites

Yazarlar:

Zeynep Hale Keleş | Berna Tarım

Yayıncı:

Istanbul University

Ana Başlıklar:

Dentistry (Other)

Dergi:

European Oral Research Vol.59 Issue 2, pp.121-128

Belge Tipi:

Makale

Yayın Tarihi:

5/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001352461

pISSN:

2630-6158

Bulk-fill composite

degree of conversion

depth of cure

light-guide tip diameter

micro-hardness

Sayı

Makale detayları

Effect of light guide tip diameter on the degree of conversion and depth of cure of bulk-fill composites

Yazarlar: Zeynep Hale Keleş | Berna Tarım

Yayıncı: Istanbul University

Ana Başlıklar: Dentistry (Other)

Dergi: European Oral Research Vol.59 Issue 2, pp.121-128

Belge Tipi: Makale

Yayın Tarihi: 5/2025

Belge Dili: İngilizce

Document ID (Org No.): 2001352461

pISSN: 2630-6158

Bulk-fill composite

degree of conversion

depth of cure

light-guide tip diameter

micro-hardness

Sayı

Yazarlar:

Zeynep Hale Keleş | Berna Tarım

Yayıncı:

Istanbul University

Ana Başlıklar:

Dentistry (Other)

Dergi:

European Oral Research Vol.59 Issue 2, pp.121-128

Belge Tipi:

Makale

Yayın Tarihi:

5/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001352461

pISSN:

2630-6158