Stability of different fixation methods after reduction malarplasty under average and maximum masticatory forces: a finite element analysis
Abstract Background Although titanium plates/screws are effective fixation methods (FM) after L-shaped osteotomy reduction malarplasty (LORM), the ideal FM remains controversial. This first finite element analysis (FEA) aimed to study the effect of various zygomatic body/zygomatic arch FM combinatio...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2023-04-01
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| Series: | BioMedical Engineering OnLine |
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| Online Access: | https://doi.org/10.1186/s12938-023-01098-8 |
| _version_ | 1827961156987256832 |
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| author | Mohammed Qasem Al-Watary Heyou Gao Libin Song Yingyou He Yiyuan Wei Jihua Li |
| author_facet | Mohammed Qasem Al-Watary Heyou Gao Libin Song Yingyou He Yiyuan Wei Jihua Li |
| author_sort | Mohammed Qasem Al-Watary |
| collection | DOAJ |
| description | Abstract Background Although titanium plates/screws are effective fixation methods (FM) after L-shaped osteotomy reduction malarplasty (LORM), the ideal FM remains controversial. This first finite element analysis (FEA) aimed to study the effect of various zygomatic body/zygomatic arch FM combinations and their placement vectors on the zygoma complex stability after virtual LORM under the effect of both average (150 N/mm2) and maximum (750 N/mm2) forces and three-dimensional (3D) mapping of stress and strain parameters distribution over the zygomatic bone, fixation methods, and total model. Results The fixation methods about the short-arm of the L-shaped osteotomy showed lower stress, strain, and displacement values than those across the long-arm osteotomy site. Combined with any zygomatic arch fixation methods (ZAFm), the two bicortical screws group (2LS) on the zygomatic body osteotomy site resulted in smaller displacements and the lowest zygoma bone stress and displacement when combined with Mortice–Tenon structure (MT) as zygomatic arch fixation method. Applied forces caused statistically significant differences in zygomatic bone stress (P < 0.001 and P = 0.001) and displacement (P = 0.001 and P = 0.002). Conclusion All FMs both on the zygomatic body and zygomatic arch provide adequate zygomatic complex stability after LORM. The 2LS group showed better resistance than rectangular plate (RP) and square plate (SP) with lower stress concentrations. The L-shaped plate with short-wing on the maxilla (LPwM) is more stable than having the short-wing on the zygoma bone (LPwZ). Future prospective clinical studies are required to validate the current findings. |
| first_indexed | 2024-04-09T16:22:31Z |
| format | Article |
| id | doaj.art-2848e3a21dd64da2bd7b6e8140cc79ed |
| institution | Directory Open Access Journal |
| issn | 1475-925X |
| language | English |
| last_indexed | 2024-04-09T16:22:31Z |
| publishDate | 2023-04-01 |
| publisher | BMC |
| record_format | Article |
| series | BioMedical Engineering OnLine |
| spelling | doaj.art-2848e3a21dd64da2bd7b6e8140cc79ed2023-04-23T11:23:54ZengBMCBioMedical Engineering OnLine1475-925X2023-04-0122111710.1186/s12938-023-01098-8Stability of different fixation methods after reduction malarplasty under average and maximum masticatory forces: a finite element analysisMohammed Qasem Al-Watary0Heyou Gao1Libin Song2Yingyou He3Yiyuan Wei4Jihua Li5State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, Center of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan UniversityState Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, Center of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan UniversityState Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, Center of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan UniversityState Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, Center of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan UniversityState Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, Center of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan UniversityState Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, Center of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan UniversityAbstract Background Although titanium plates/screws are effective fixation methods (FM) after L-shaped osteotomy reduction malarplasty (LORM), the ideal FM remains controversial. This first finite element analysis (FEA) aimed to study the effect of various zygomatic body/zygomatic arch FM combinations and their placement vectors on the zygoma complex stability after virtual LORM under the effect of both average (150 N/mm2) and maximum (750 N/mm2) forces and three-dimensional (3D) mapping of stress and strain parameters distribution over the zygomatic bone, fixation methods, and total model. Results The fixation methods about the short-arm of the L-shaped osteotomy showed lower stress, strain, and displacement values than those across the long-arm osteotomy site. Combined with any zygomatic arch fixation methods (ZAFm), the two bicortical screws group (2LS) on the zygomatic body osteotomy site resulted in smaller displacements and the lowest zygoma bone stress and displacement when combined with Mortice–Tenon structure (MT) as zygomatic arch fixation method. Applied forces caused statistically significant differences in zygomatic bone stress (P < 0.001 and P = 0.001) and displacement (P = 0.001 and P = 0.002). Conclusion All FMs both on the zygomatic body and zygomatic arch provide adequate zygomatic complex stability after LORM. The 2LS group showed better resistance than rectangular plate (RP) and square plate (SP) with lower stress concentrations. The L-shaped plate with short-wing on the maxilla (LPwM) is more stable than having the short-wing on the zygoma bone (LPwZ). Future prospective clinical studies are required to validate the current findings.https://doi.org/10.1186/s12938-023-01098-8Reduction malarplastyStabilityZygomatic body fixation methodsFinite element methodsZygomatic arch fixation methods |
| spellingShingle | Mohammed Qasem Al-Watary Heyou Gao Libin Song Yingyou He Yiyuan Wei Jihua Li Stability of different fixation methods after reduction malarplasty under average and maximum masticatory forces: a finite element analysis BioMedical Engineering OnLine Reduction malarplasty Stability Zygomatic body fixation methods Finite element methods Zygomatic arch fixation methods |
| title | Stability of different fixation methods after reduction malarplasty under average and maximum masticatory forces: a finite element analysis |
| title_full | Stability of different fixation methods after reduction malarplasty under average and maximum masticatory forces: a finite element analysis |
| title_fullStr | Stability of different fixation methods after reduction malarplasty under average and maximum masticatory forces: a finite element analysis |
| title_full_unstemmed | Stability of different fixation methods after reduction malarplasty under average and maximum masticatory forces: a finite element analysis |
| title_short | Stability of different fixation methods after reduction malarplasty under average and maximum masticatory forces: a finite element analysis |
| title_sort | stability of different fixation methods after reduction malarplasty under average and maximum masticatory forces a finite element analysis |
| topic | Reduction malarplasty Stability Zygomatic body fixation methods Finite element methods Zygomatic arch fixation methods |
| url | https://doi.org/10.1186/s12938-023-01098-8 |
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