Comparison of Different Cervical Finish Lines of All-Ceramic Crowns on Primary Molars in Finite Element Analysis
This study aimed to conduct a stress analysis of four types of cervical finish lines in posterior all-ceramic crowns on the primary roots of molar teeth. Four different types of finish lines (shoulder 0.5 mm, feather-edged, chamfer 0.6 mm, and mini chamfer 0.4 mm) and two all-ceramic crown materials...
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doaj-296e0254377e4493b13b74f27b0dbd682020-11-25T01:19:53ZengMDPI AGMaterials1996-19442020-03-01135109410.3390/ma13051094ma13051094Comparison of Different Cervical Finish Lines of All-Ceramic Crowns on Primary Molars in Finite Element AnalysisChin-Yun Pan0Ting-Hsun Lan1Pao-Hsin Liu2Wan-Ru Fu3Division of Orthodontics, Department of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung 80756, TaiwanDivision of Prosthodontics, Department of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung 80756, TaiwanDepartment of Biomedical Engineering I-Shou University, Kaohsiung 82442, TaiwanDepartment of Stomatology, Kaohsiung Veterans General Hospital, Kaohsiung 81362, TaiwanThis study aimed to conduct a stress analysis of four types of cervical finish lines in posterior all-ceramic crowns on the primary roots of molar teeth. Four different types of finish lines (shoulder 0.5 mm, feather-edged, chamfer 0.6 mm, and mini chamfer 0.4 mm) and two all-ceramic crown materials (zirconia and lithium disilicate) were used to construct eight finite element primary tooth models with full-coverage crowns. A load of 200 N was applied at two different loading angles (0° and 15°) so as to mimic children’s masticatory force and occlusal tendency. The maximum stress distribution from the three-dimensional finite element models was determined, and the main effect of each factor (loading type, material, and finish line types) was evaluated in terms of the stress values for all of the models. The results indicated that the loading type (90.25%) was the main factor influencing the maximum stress value of the primary root, and that the feather-edged margin showed the highest stress value (<i>p</i> = 0.002). In conclusion, shoulder and chamfer types of finish lines with a 0.4−0.6 mm thickness are recommended for deciduous tooth preparation, according to the biomechanical analysis.https://www.mdpi.com/1996-1944/13/5/1094deciduous teethstress analysisall-ceramic crowncervical finish line |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chin-Yun Pan Ting-Hsun Lan Pao-Hsin Liu Wan-Ru Fu |
spellingShingle |
Chin-Yun Pan Ting-Hsun Lan Pao-Hsin Liu Wan-Ru Fu Comparison of Different Cervical Finish Lines of All-Ceramic Crowns on Primary Molars in Finite Element Analysis Materials deciduous teeth stress analysis all-ceramic crown cervical finish line |
author_facet |
Chin-Yun Pan Ting-Hsun Lan Pao-Hsin Liu Wan-Ru Fu |
author_sort |
Chin-Yun Pan |
title |
Comparison of Different Cervical Finish Lines of All-Ceramic Crowns on Primary Molars in Finite Element Analysis |
title_short |
Comparison of Different Cervical Finish Lines of All-Ceramic Crowns on Primary Molars in Finite Element Analysis |
title_full |
Comparison of Different Cervical Finish Lines of All-Ceramic Crowns on Primary Molars in Finite Element Analysis |
title_fullStr |
Comparison of Different Cervical Finish Lines of All-Ceramic Crowns on Primary Molars in Finite Element Analysis |
title_full_unstemmed |
Comparison of Different Cervical Finish Lines of All-Ceramic Crowns on Primary Molars in Finite Element Analysis |
title_sort |
comparison of different cervical finish lines of all-ceramic crowns on primary molars in finite element analysis |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-03-01 |
description |
This study aimed to conduct a stress analysis of four types of cervical finish lines in posterior all-ceramic crowns on the primary roots of molar teeth. Four different types of finish lines (shoulder 0.5 mm, feather-edged, chamfer 0.6 mm, and mini chamfer 0.4 mm) and two all-ceramic crown materials (zirconia and lithium disilicate) were used to construct eight finite element primary tooth models with full-coverage crowns. A load of 200 N was applied at two different loading angles (0° and 15°) so as to mimic children’s masticatory force and occlusal tendency. The maximum stress distribution from the three-dimensional finite element models was determined, and the main effect of each factor (loading type, material, and finish line types) was evaluated in terms of the stress values for all of the models. The results indicated that the loading type (90.25%) was the main factor influencing the maximum stress value of the primary root, and that the feather-edged margin showed the highest stress value (<i>p</i> = 0.002). In conclusion, shoulder and chamfer types of finish lines with a 0.4−0.6 mm thickness are recommended for deciduous tooth preparation, according to the biomechanical analysis. |
topic |
deciduous teeth stress analysis all-ceramic crown cervical finish line |
url |
https://www.mdpi.com/1996-1944/13/5/1094 |
work_keys_str_mv |
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