The effects of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment: a finite element exploration
Abstract Background The mechanism of force application in clear aligner treatment involves wrapping the clinical crowns, suggesting that the size of the clinical crowns may impact tooth movement. The present finite element study aimed to explore the impact of clinical crown length on the sagittal mo...
Saved in:
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2025-03-01
|
| Series: | BMC Oral Health |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s12903-025-05726-8 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850251856493674496 |
|---|---|
| author | Chen Zhou Zhicai Feng Jianhan Ren Haotian Luo Hio Cheng Ieong Runze Li Yangqiao Qing Yuqing Guo Bingyan Guo Zichun Huang Yang Cao Weicai Wang |
| author_facet | Chen Zhou Zhicai Feng Jianhan Ren Haotian Luo Hio Cheng Ieong Runze Li Yangqiao Qing Yuqing Guo Bingyan Guo Zichun Huang Yang Cao Weicai Wang |
| author_sort | Chen Zhou |
| collection | DOAJ |
| description | Abstract Background The mechanism of force application in clear aligner treatment involves wrapping the clinical crowns, suggesting that the size of the clinical crowns may impact tooth movement. The present finite element study aimed to explore the impact of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment. Methods The standard maxillary dentition model was developed using computer tomography scanning. Finite element models of the maxillary dentition, alveolar bone, periodontal ligament, and aligners were established. Twelve model groups were divided based on different clinical crown lengths and attachments’ position to simulated the tipping and translational movements of the right maxillary central incisor. The dimensions of the short and long clinical crowns were determined based on epidemiological evidence, and appropriate models were constructed by shortening or elongating the normal incisors by 20% along the longitudinal axis of the tooth. Horizontal rectangular attachments were constructed at the clinical crown center of the short, normal and long clinical crowns. These attachments were categorized into four types: no attachment, labial attachment, palatal attachment and labio-palatal attachments. The finite element analysis focused on evaluating the contact pressure distribution on the crown, displacements, rotations, and von Mises stress in PDL of the right maxillary central incisors. Results In tipping movement, the long clinical crown exhibited the highest crown displacement and rotation, enhancing the efficiency. In translational movement, the long clinical crown had the lowest TL/CD value, losing less torque during the crown displacement. However, the short clinical crown had the lowest M x /F y value, with a greater tendency to move bodily rather than long ones. The von Mises stress distribution in PDL was similar between the two types of movement, while the maximum von Mises stress increased with increasing clinical crown lengths in tipping movement. Labio-lingual attachment had the optimal effect in tipping and translational movement. Conclusions Clinical crown length has considerable influences on the efficiency, movement behavior, and maximum von Mises stress of the PDL in the sagittal movement of maxillary center incisor in clear aligner treatment. Moreover, attachments also influence the movement efficiency of the incisor. |
| format | Article |
| id | doaj-art-87b02ccfc5ca427ba377378da40f240b |
| institution | OA Journals |
| issn | 1472-6831 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Oral Health |
| spelling | doaj-art-87b02ccfc5ca427ba377378da40f240b2025-08-20T01:57:48ZengBMCBMC Oral Health1472-68312025-03-0125111510.1186/s12903-025-05726-8The effects of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment: a finite element explorationChen Zhou0Zhicai Feng1Jianhan Ren2Haotian Luo3Hio Cheng Ieong4Runze Li5Yangqiao Qing6Yuqing Guo7Bingyan Guo8Zichun Huang9Yang Cao10Weicai Wang11Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityHospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen UniversityAbstract Background The mechanism of force application in clear aligner treatment involves wrapping the clinical crowns, suggesting that the size of the clinical crowns may impact tooth movement. The present finite element study aimed to explore the impact of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment. Methods The standard maxillary dentition model was developed using computer tomography scanning. Finite element models of the maxillary dentition, alveolar bone, periodontal ligament, and aligners were established. Twelve model groups were divided based on different clinical crown lengths and attachments’ position to simulated the tipping and translational movements of the right maxillary central incisor. The dimensions of the short and long clinical crowns were determined based on epidemiological evidence, and appropriate models were constructed by shortening or elongating the normal incisors by 20% along the longitudinal axis of the tooth. Horizontal rectangular attachments were constructed at the clinical crown center of the short, normal and long clinical crowns. These attachments were categorized into four types: no attachment, labial attachment, palatal attachment and labio-palatal attachments. The finite element analysis focused on evaluating the contact pressure distribution on the crown, displacements, rotations, and von Mises stress in PDL of the right maxillary central incisors. Results In tipping movement, the long clinical crown exhibited the highest crown displacement and rotation, enhancing the efficiency. In translational movement, the long clinical crown had the lowest TL/CD value, losing less torque during the crown displacement. However, the short clinical crown had the lowest M x /F y value, with a greater tendency to move bodily rather than long ones. The von Mises stress distribution in PDL was similar between the two types of movement, while the maximum von Mises stress increased with increasing clinical crown lengths in tipping movement. Labio-lingual attachment had the optimal effect in tipping and translational movement. Conclusions Clinical crown length has considerable influences on the efficiency, movement behavior, and maximum von Mises stress of the PDL in the sagittal movement of maxillary center incisor in clear aligner treatment. Moreover, attachments also influence the movement efficiency of the incisor.https://doi.org/10.1186/s12903-025-05726-8Clinical crown lengthMaxillary central incisorClear aligner treatmentTooth movementFinite element analysis |
| spellingShingle | Chen Zhou Zhicai Feng Jianhan Ren Haotian Luo Hio Cheng Ieong Runze Li Yangqiao Qing Yuqing Guo Bingyan Guo Zichun Huang Yang Cao Weicai Wang The effects of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment: a finite element exploration BMC Oral Health Clinical crown length Maxillary central incisor Clear aligner treatment Tooth movement Finite element analysis |
| title | The effects of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment: a finite element exploration |
| title_full | The effects of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment: a finite element exploration |
| title_fullStr | The effects of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment: a finite element exploration |
| title_full_unstemmed | The effects of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment: a finite element exploration |
| title_short | The effects of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment: a finite element exploration |
| title_sort | effects of clinical crown length on the sagittal movement of maxillary central incisor in clear aligner treatment a finite element exploration |
| topic | Clinical crown length Maxillary central incisor Clear aligner treatment Tooth movement Finite element analysis |
| url | https://doi.org/10.1186/s12903-025-05726-8 |
| work_keys_str_mv | AT chenzhou theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT zhicaifeng theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT jianhanren theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT haotianluo theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT hiochengieong theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT runzeli theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT yangqiaoqing theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT yuqingguo theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT bingyanguo theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT zichunhuang theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT yangcao theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT weicaiwang theeffectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT chenzhou effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT zhicaifeng effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT jianhanren effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT haotianluo effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT hiochengieong effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT runzeli effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT yangqiaoqing effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT yuqingguo effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT bingyanguo effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT zichunhuang effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT yangcao effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration AT weicaiwang effectsofclinicalcrownlengthonthesagittalmovementofmaxillarycentralincisorinclearalignertreatmentafiniteelementexploration |