Stress distribution of the modified clear twin-block aligner on the temporomandibular joint, alveolar bone and teeth: A finite element analysis

Huang, Wenli; Dong, Lirong; Yu, Shaoyang; Zheng, Yao; Wu, Haoting; Li, Chenzhi; Zhang, Yingyue; Zhang, Qiang; Yan, Xiao; Lv, Tao; Yuan, Xiao

doi:10.1016/j.ortho.2023.100815

Cited by 5 publications

(1 citation statement)

References 42 publications

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“…Although Twin Block has demonstrated significant effects on mandibular advancement, anterior tooth deep overjet reduction, and molar relationship improvement [7], it possesses certain limitations, such as discomfort and unfavorable esthetics and challenges in speech and pronunciation [8]. In recent years, clear functional aligners have gradually gained popularity owing to their superior esthetics and comfort [9]. Previous studies have compared the dental and skeletal effects of using Twin-Block and clear aligners [10,11].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional spatial analysis of temporomandibular joint in adolescent Class II division 1 malocclusion patients: comparison of Twin-Block and clear functional aligner

Zhang,

Zheng,

et al. 2024

Head Face Med

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Background Our study aimed to use three-dimensional (3D) spatial morphological measurement methods to compare the influence of Twin-Block and clear functional aligners on the temporomandibular joint (TMJ) of adolescent Class II division 1 malocclusion mandibular retraction patients. We also aimed to explore the similarities and differences in the effects on the TMJ upon using Twin-Block and clear functional aligner. Methods Cone-beam computed tomography (CBCT) data of 49 patients with Class II division 1 malocclusion (Twin-Block group: 24; clear functional aligner group: 25) were collected before and after functional orthodontic treatment, and a 3D model of the TMJ was reconstructed using MIMICS 21.0 software. Eighteen measurement parameters, including the anterior, superior, and posterior joint spaces, were measured and compared using the 3D model. Results After the two groups underwent functional appliance treatment, the height, volume, and surface area of the condyle, length of the mandibular ramus and mandibular length increased; The retro-displaced condyle moved to the middle position of the articular fossa, while the rest of the condylar position did not change significantly. Remodeling of the articular fossa after treatment was not evident. The superior joint space of the clear functional aligner group increased, but there was no significant change after Twin-Block appliances treatment. Conclusions Both appliances promote condylar growth and sagittal and vertical development of the mandible in adolescent Class II division 1 malocclusion mandibular retraction patients. The length of the mandibular ramus showed a more significant increase following treatment with the Twin-Block appliances than with clear function aligners.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional spatial analysis of temporomandibular joint in adolescent Class II division 1 malocclusion patients: comparison of Twin-Block and clear functional aligner

Zhang,

Zheng,

et al. 2024

Head Face Med

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The Use of Finite Element Analysis to Study Stress Distribution on Temporo-Mandibular Joints and Teeth Using Mandibular Advancement Devices for Obstructive Sleep Apnea Treatment

Basilicata,

Bruno,

Bernardini

2024

Engineering Methodologies for Medicine and Sports

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Evaluation of modified clear Twin Block aligner in treating adolescents with skeletal class II malocclusion: A two‐centre cephalometric study

Feng,

Jiang,

Wang

et al. 2024

Orthod Craniofacial Res

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IntroductionThe purpose of this study was to evaluate the therapeutic effect of modified clear Twin Block (CTB) aligner and traditional twin block (TB) appliance from skeletal, dentoalveolar and soft tissue changes in adolescents with skeletal class II malocclusion.MethodsA total of 80 adolescents, included in this study from two medical centres, were distributed into CTB group, TB group and control group based on the treatment they received. Lateral cephalograms at pre‐treatment (T1) and post‐treatment (T2) were measured by modified Pancherz's cephalometric analysis, and dentoskeletal and soft tissue changes were analysed by independent‐sample t‐test, paired‐sample t‐test, ANOVA test and Scheffe's Post Hoc test.ResultsSeventy‐five adolescents completed the study, including 32 in the CTB group, 32 in the TB group and 11 in the control group. Both CTB and TB treatment showed significant differences in most dentoskeletal and soft tissue measurements. Compared with the control group, improvements were observed in class II molar relationship through significant different in S Vert/Ms‐S Vert/Mi in the CTB group (P < .01) and the TB group (P < .001), as well as deep overjet through significant different in S Vert/Is‐S Vert/Ii in the CTB group (P < .001) and the TB group (P < .001). Besides, the CTB group also showed less protrusion of lower incisors and resulted in a more significant improvement in profile with fewer adverse effects on speaking, eating and social activities.ConclusionsFor adolescents with skeletal class II malocclusion, CTB appliance was as effective as TB on improving dentoskeletal and soft tissue measurements, featuring more reliable teeth control and patient acceptance.

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Stress distribution of the modified clear twin-block aligner on the temporomandibular joint, alveolar bone and teeth: A finite element analysis

Cited by 5 publications

References 42 publications

Three-dimensional spatial analysis of temporomandibular joint in adolescent Class II division 1 malocclusion patients: comparison of Twin-Block and clear functional aligner

Three-dimensional spatial analysis of temporomandibular joint in adolescent Class II division 1 malocclusion patients: comparison of Twin-Block and clear functional aligner

The Use of Finite Element Analysis to Study Stress Distribution on Temporo-Mandibular Joints and Teeth Using Mandibular Advancement Devices for Obstructive Sleep Apnea Treatment

Evaluation of modified clear Twin Block aligner in treating adolescents with skeletal class II malocclusion: A two‐centre cephalometric study

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