Comparison of invisalign mandibular advancement and twin-block on upper airway and hyoid bone position improvements for skeletal class II children: a retrospective study
Abstract Background This study is to evaluate and compare the improvement of upper airway morphology and hyoid bone position in children with Class II mandibular retrusion treated with Invisalign mandibular advancement (MA) and Twin-Block (TB) appliances, utilizing cone beam computed tomography (CBC...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2023-09-01
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| Series: | BMC Oral Health |
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| Online Access: | https://doi.org/10.1186/s12903-023-03295-2 |
| _version_ | 1797556033637318656 |
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| author | Zheng Yue Zian Yi Xinyi Liu Mengting Chen Shuhui Yin Qianqian Liu Xuefeng Chen Jiangtian Hu |
| author_facet | Zheng Yue Zian Yi Xinyi Liu Mengting Chen Shuhui Yin Qianqian Liu Xuefeng Chen Jiangtian Hu |
| author_sort | Zheng Yue |
| collection | DOAJ |
| description | Abstract Background This study is to evaluate and compare the improvement of upper airway morphology and hyoid bone position in children with Class II mandibular retrusion treated with Invisalign mandibular advancement (MA) and Twin-Block (TB) appliances, utilizing cone beam computed tomography (CBCT). Methods 32 children aged between 8 and 11.5 years old were included in this study, with an average age of 10.2 years old. These children were divided into two groups, MA and TB, with 16 children in each group. Changes in upper airway morphology and hyoid bone position before and after treatment were analyzed using CBCT. Results (1) Changes in upper airway before and after treatment: the oropharynx volume (Or-V), the oropharynx minimum cross-sectional area (Or-mCSA), the hypopharynx volume (Hy-V), and the hypopharynx minimum cross-sectional area (Hy-mCSA) in both the MA and TB groups increased after treatment, and the differences were statistically significant (P < 0.05) compared to pre-treatment status. (2) Changes in hyoid bone position before and after treatment: The distances between H point and third cervical vertebra (H-C3), H point and pogonion (H-RGN), H point and mandibular plane (H-MP), H point and Frankfort horizontal plane (H-FH), H and S point (H-S), and H point and palatal plane (H-PP) in both the MA and TB groups increased after treatment, and the differences were statistically significant (P < 0.05). Conclusion Both MA and TB appliances effectively improved the structural narrowness of the upper airway and reduced respiratory resistance, thus improving breath quality. However, MA showed more effectiveness in improving the narrowest part of the hypopharynx compared to TB. Both appliances also promoted anterior downward movement of the hyoid bone, which opens the upper airway of the oropharynx and hypopharynx and helps the upper airway morphology return to normal range. |
| first_indexed | 2024-03-10T16:55:56Z |
| format | Article |
| id | doaj.art-89ed40122f1a49728fd4cb5e482f4a58 |
| institution | Directory Open Access Journal |
| issn | 1472-6831 |
| language | English |
| last_indexed | 2024-03-10T16:55:56Z |
| publishDate | 2023-09-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Oral Health |
| spelling | doaj.art-89ed40122f1a49728fd4cb5e482f4a582023-11-20T11:07:36ZengBMCBMC Oral Health1472-68312023-09-0123111010.1186/s12903-023-03295-2Comparison of invisalign mandibular advancement and twin-block on upper airway and hyoid bone position improvements for skeletal class II children: a retrospective studyZheng Yue0Zian Yi1Xinyi Liu2Mengting Chen3Shuhui Yin4Qianqian Liu5Xuefeng Chen6Jiangtian Hu7Department of Orthodontics, Kunming Medical University School and Hospital of StomatologyState Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of Stomatology, Department of Orthodontics, School of Stomatology, The Fourth Military Medical UniversityDepartment of Orthodontics, Kunming Medical University School and Hospital of StomatologyDepartment of Orthodontics, Kunming Medical University School and Hospital of StomatologyDepartment of Orthodontics, Kunming Medical University School and Hospital of StomatologyDepartment of Orthodontics, Kunming Medical University School and Hospital of StomatologyXuefeng Dental CareDepartment of Orthodontics, Kunming Medical University School and Hospital of StomatologyAbstract Background This study is to evaluate and compare the improvement of upper airway morphology and hyoid bone position in children with Class II mandibular retrusion treated with Invisalign mandibular advancement (MA) and Twin-Block (TB) appliances, utilizing cone beam computed tomography (CBCT). Methods 32 children aged between 8 and 11.5 years old were included in this study, with an average age of 10.2 years old. These children were divided into two groups, MA and TB, with 16 children in each group. Changes in upper airway morphology and hyoid bone position before and after treatment were analyzed using CBCT. Results (1) Changes in upper airway before and after treatment: the oropharynx volume (Or-V), the oropharynx minimum cross-sectional area (Or-mCSA), the hypopharynx volume (Hy-V), and the hypopharynx minimum cross-sectional area (Hy-mCSA) in both the MA and TB groups increased after treatment, and the differences were statistically significant (P < 0.05) compared to pre-treatment status. (2) Changes in hyoid bone position before and after treatment: The distances between H point and third cervical vertebra (H-C3), H point and pogonion (H-RGN), H point and mandibular plane (H-MP), H point and Frankfort horizontal plane (H-FH), H and S point (H-S), and H point and palatal plane (H-PP) in both the MA and TB groups increased after treatment, and the differences were statistically significant (P < 0.05). Conclusion Both MA and TB appliances effectively improved the structural narrowness of the upper airway and reduced respiratory resistance, thus improving breath quality. However, MA showed more effectiveness in improving the narrowest part of the hypopharynx compared to TB. Both appliances also promoted anterior downward movement of the hyoid bone, which opens the upper airway of the oropharynx and hypopharynx and helps the upper airway morphology return to normal range.https://doi.org/10.1186/s12903-023-03295-2Skeletal class II malocclusionInvisalign mandibular advancementHyoid boneTwin-blockUpper airway |
| spellingShingle | Zheng Yue Zian Yi Xinyi Liu Mengting Chen Shuhui Yin Qianqian Liu Xuefeng Chen Jiangtian Hu Comparison of invisalign mandibular advancement and twin-block on upper airway and hyoid bone position improvements for skeletal class II children: a retrospective study BMC Oral Health Skeletal class II malocclusion Invisalign mandibular advancement Hyoid bone Twin-block Upper airway |
| title | Comparison of invisalign mandibular advancement and twin-block on upper airway and hyoid bone position improvements for skeletal class II children: a retrospective study |
| title_full | Comparison of invisalign mandibular advancement and twin-block on upper airway and hyoid bone position improvements for skeletal class II children: a retrospective study |
| title_fullStr | Comparison of invisalign mandibular advancement and twin-block on upper airway and hyoid bone position improvements for skeletal class II children: a retrospective study |
| title_full_unstemmed | Comparison of invisalign mandibular advancement and twin-block on upper airway and hyoid bone position improvements for skeletal class II children: a retrospective study |
| title_short | Comparison of invisalign mandibular advancement and twin-block on upper airway and hyoid bone position improvements for skeletal class II children: a retrospective study |
| title_sort | comparison of invisalign mandibular advancement and twin block on upper airway and hyoid bone position improvements for skeletal class ii children a retrospective study |
| topic | Skeletal class II malocclusion Invisalign mandibular advancement Hyoid bone Twin-block Upper airway |
| url | https://doi.org/10.1186/s12903-023-03295-2 |
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