TY - JOUR
T1 - The investigation of composition and thermal behavior of two types of backfilling gutta-percha
AU - Huang, Pai Chun
AU - Wu, Yi Ting
AU - Hsu, Yung Hao
AU - Liao, Szu Chin
AU - Wang, Ya Hsuan
AU - Gutmann, James L.
AU - Huang, Haw Ming
AU - Hsieh, Sung Chih
N1 - Funding Information:
This study was supported by the Ministry of Science and Technology, Taiwan (109-2813-C-038-033-B). The authors would like to thank Taipei Medical University for providing all the research facilities for this study.
Funding Information:
This study was supported by the Ministry of Science and Technology, Taiwan ( 109-2813-C-038-033-B ).
Publisher Copyright:
© 2022 Association for Dental Sciences of the Republic of China
PY - 2023/1
Y1 - 2023/1
N2 - Background/purpose: In the warm gutta-percha technique, soft-type and regular-type gutta-percha are using for backfilling thermoplasticized injection system. However, there are limited reports about the properties of these backfilling gutta-percha. This study aimed to analyze and compare the composition, thermal behavior and compact force of two types of backfilling gutta-percha. Materials and methods: Soft-type and regular-type backfilling gutta-percha (B&L BioTech, Fairfax, VA, USA) were investigated. The inorganic and organic fractions of these gutta-perchas were separated by quantitative chemical analysis (n = 6). Their composition was analyzed using energy dispersive spectroscopy. Thermal behavior in response to temperature variations was analyzed using differential scanning calorimetry. Additionally, a compaction model was used to investigate the relation between compaction force and temperature (n = 10). Results: The soft-type contained more gutta-percha (3.69–5.85%), carbon ratio (38.96–48.52%) and less inorganic substance (86.51–90.45%), zinc ratio (29.36–35.67%). The composition ratio of two types gutta-percha were statistically significant different (P < 0.05). There were three phase transitions of the soft-type gutta-percha which started at 39.84 °C, 49.32 °C and 54.15 °C while the two phase transitions of the regular-type gutta-percha started at 40.48 °C and 53.45 °C. The glass transition temperature of the regular-type gutta-percha (44.24 °C) was higher than that of the soft-type gutta-percha (40.66 °C). Under various setting temperature, the higher compaction force in the regular-type gutta-percha was required (P < 0.05). Conclusion: The different components in gutta-percha contribute to its differences in thermal behavior. The soft-type had a higher proportion of gutta-percha and lower ZnO which makes the fluidity better than the regular-type.
AB - Background/purpose: In the warm gutta-percha technique, soft-type and regular-type gutta-percha are using for backfilling thermoplasticized injection system. However, there are limited reports about the properties of these backfilling gutta-percha. This study aimed to analyze and compare the composition, thermal behavior and compact force of two types of backfilling gutta-percha. Materials and methods: Soft-type and regular-type backfilling gutta-percha (B&L BioTech, Fairfax, VA, USA) were investigated. The inorganic and organic fractions of these gutta-perchas were separated by quantitative chemical analysis (n = 6). Their composition was analyzed using energy dispersive spectroscopy. Thermal behavior in response to temperature variations was analyzed using differential scanning calorimetry. Additionally, a compaction model was used to investigate the relation between compaction force and temperature (n = 10). Results: The soft-type contained more gutta-percha (3.69–5.85%), carbon ratio (38.96–48.52%) and less inorganic substance (86.51–90.45%), zinc ratio (29.36–35.67%). The composition ratio of two types gutta-percha were statistically significant different (P < 0.05). There were three phase transitions of the soft-type gutta-percha which started at 39.84 °C, 49.32 °C and 54.15 °C while the two phase transitions of the regular-type gutta-percha started at 40.48 °C and 53.45 °C. The glass transition temperature of the regular-type gutta-percha (44.24 °C) was higher than that of the soft-type gutta-percha (40.66 °C). Under various setting temperature, the higher compaction force in the regular-type gutta-percha was required (P < 0.05). Conclusion: The different components in gutta-percha contribute to its differences in thermal behavior. The soft-type had a higher proportion of gutta-percha and lower ZnO which makes the fluidity better than the regular-type.
KW - Backfilling
KW - Regular-type gutta-percha
KW - Soft-type gutta-percha
KW - Thermal behavior
KW - Warm vertical compaction
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U2 - 10.1016/j.jds.2022.08.014
DO - 10.1016/j.jds.2022.08.014
M3 - Article
AN - SCOPUS:85138510254
SN - 1991-7902
VL - 18
SP - 414
EP - 419
JO - Journal of Dental Sciences
JF - Journal of Dental Sciences
IS - 1
ER -