Pulp blood flow changes in maxillary and mandibular anterior teeth after orthodontic retraction: a prospective study
Abstract Background Previous studies of pulpal blood flow (PBF) changes in anterior teeth have been limited in the early phase of orthodontic treatment; less is known about the blood supply of anterior teeth in bimaxillary protrusion patients after orthodontic retraction. Methods Fifty bimaxillary p...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2022-11-01
|
| Series: | BMC Oral Health |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s12903-022-02559-7 |
| _version_ | 1811219406298021888 |
|---|---|
| author | Runzhi Guo Qianyao Yu Yifan Lin Jing Li Yiping Huang Weiran Li |
| author_facet | Runzhi Guo Qianyao Yu Yifan Lin Jing Li Yiping Huang Weiran Li |
| author_sort | Runzhi Guo |
| collection | DOAJ |
| description | Abstract Background Previous studies of pulpal blood flow (PBF) changes in anterior teeth have been limited in the early phase of orthodontic treatment; less is known about the blood supply of anterior teeth in bimaxillary protrusion patients after orthodontic retraction. Methods Fifty bimaxillary protrusion patients (25 orthodontic patients ready for debonding and 25 non-orthodontic patients) were selected as study participants. The PBF of maxillary and mandibular anterior teeth were measured using laser Doppler flowmetry. For orthodontic patients, the PBF was measured at 1 day (T1), 1 month (T2), and 3 months (T3) after fixed appliance removal. Non-orthodontic patient PBF was measured as a control. Cone-beam computed tomography (CBCT) examinations before and after orthodontic treatment were performed for orthodontic patients to measure the root resorption. The anterior teeth in orthodontic group were further divided into subgroups according to root resorption and patient age. Results At T1 and T3, PBF changes did not differ significantly between the orthodontic and non-orthodontic groups. Maxillary lateral incisor, maxillary central incisor, and mandibular lateral incisor PBFs at T2 were significantly higher in the orthodontic group (P = 0.048, P = 0.04, and P = 0.021). No significant difference in PBF was found between the root resorption and non-resorption subgroups at any time point. Adolescent patients showed a higher PBF in the maxillary lateral incisor at T2 (12.23 ± 3.48) relative to that at T1 (9.10 ± 3.76) and T3 (9.81 ± 2.80) with statistically significant difference (P = 0.020). Conclusion For bimaxillary protrusion patients with four premolars extraction, PBF in the maxillary anterior teeth increased transiently after orthodontic appliance removal and then returned to non-orthodontic levels 3 months later. This effect was more pronounced in adolescents. The PBF of anterior teeth after orthodontic retraction may not be influenced by root resorption. |
| first_indexed | 2024-04-12T07:25:12Z |
| format | Article |
| id | doaj.art-c144cb1226dd4923a54b8d82bb1244da |
| institution | Directory Open Access Journal |
| issn | 1472-6831 |
| language | English |
| last_indexed | 2024-04-12T07:25:12Z |
| publishDate | 2022-11-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Oral Health |
| spelling | doaj.art-c144cb1226dd4923a54b8d82bb1244da2022-12-22T03:42:12ZengBMCBMC Oral Health1472-68312022-11-0122111010.1186/s12903-022-02559-7Pulp blood flow changes in maxillary and mandibular anterior teeth after orthodontic retraction: a prospective studyRunzhi Guo0Qianyao Yu1Yifan Lin2Jing Li3Yiping Huang4Weiran Li5Department of Orthodontics, Peking University School and Hospital of StomatologyDepartment of Orthodontics, Peking University School and Hospital of StomatologyDivision of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, the University of Hong KongDepartment of Orthodontics, Peking University School and Hospital of StomatologyDepartment of Orthodontics, Peking University School and Hospital of StomatologyDepartment of Orthodontics, Peking University School and Hospital of StomatologyAbstract Background Previous studies of pulpal blood flow (PBF) changes in anterior teeth have been limited in the early phase of orthodontic treatment; less is known about the blood supply of anterior teeth in bimaxillary protrusion patients after orthodontic retraction. Methods Fifty bimaxillary protrusion patients (25 orthodontic patients ready for debonding and 25 non-orthodontic patients) were selected as study participants. The PBF of maxillary and mandibular anterior teeth were measured using laser Doppler flowmetry. For orthodontic patients, the PBF was measured at 1 day (T1), 1 month (T2), and 3 months (T3) after fixed appliance removal. Non-orthodontic patient PBF was measured as a control. Cone-beam computed tomography (CBCT) examinations before and after orthodontic treatment were performed for orthodontic patients to measure the root resorption. The anterior teeth in orthodontic group were further divided into subgroups according to root resorption and patient age. Results At T1 and T3, PBF changes did not differ significantly between the orthodontic and non-orthodontic groups. Maxillary lateral incisor, maxillary central incisor, and mandibular lateral incisor PBFs at T2 were significantly higher in the orthodontic group (P = 0.048, P = 0.04, and P = 0.021). No significant difference in PBF was found between the root resorption and non-resorption subgroups at any time point. Adolescent patients showed a higher PBF in the maxillary lateral incisor at T2 (12.23 ± 3.48) relative to that at T1 (9.10 ± 3.76) and T3 (9.81 ± 2.80) with statistically significant difference (P = 0.020). Conclusion For bimaxillary protrusion patients with four premolars extraction, PBF in the maxillary anterior teeth increased transiently after orthodontic appliance removal and then returned to non-orthodontic levels 3 months later. This effect was more pronounced in adolescents. The PBF of anterior teeth after orthodontic retraction may not be influenced by root resorption.https://doi.org/10.1186/s12903-022-02559-7Bimaxillary protrusionTooth extractionLaser-Doppler FlowmetryPupal blood flow |
| spellingShingle | Runzhi Guo Qianyao Yu Yifan Lin Jing Li Yiping Huang Weiran Li Pulp blood flow changes in maxillary and mandibular anterior teeth after orthodontic retraction: a prospective study BMC Oral Health Bimaxillary protrusion Tooth extraction Laser-Doppler Flowmetry Pupal blood flow |
| title | Pulp blood flow changes in maxillary and mandibular anterior teeth after orthodontic retraction: a prospective study |
| title_full | Pulp blood flow changes in maxillary and mandibular anterior teeth after orthodontic retraction: a prospective study |
| title_fullStr | Pulp blood flow changes in maxillary and mandibular anterior teeth after orthodontic retraction: a prospective study |
| title_full_unstemmed | Pulp blood flow changes in maxillary and mandibular anterior teeth after orthodontic retraction: a prospective study |
| title_short | Pulp blood flow changes in maxillary and mandibular anterior teeth after orthodontic retraction: a prospective study |
| title_sort | pulp blood flow changes in maxillary and mandibular anterior teeth after orthodontic retraction a prospective study |
| topic | Bimaxillary protrusion Tooth extraction Laser-Doppler Flowmetry Pupal blood flow |
| url | https://doi.org/10.1186/s12903-022-02559-7 |
| work_keys_str_mv | AT runzhiguo pulpbloodflowchangesinmaxillaryandmandibularanteriorteethafterorthodonticretractionaprospectivestudy AT qianyaoyu pulpbloodflowchangesinmaxillaryandmandibularanteriorteethafterorthodonticretractionaprospectivestudy AT yifanlin pulpbloodflowchangesinmaxillaryandmandibularanteriorteethafterorthodonticretractionaprospectivestudy AT jingli pulpbloodflowchangesinmaxillaryandmandibularanteriorteethafterorthodonticretractionaprospectivestudy AT yipinghuang pulpbloodflowchangesinmaxillaryandmandibularanteriorteethafterorthodonticretractionaprospectivestudy AT weiranli pulpbloodflowchangesinmaxillaryandmandibularanteriorteethafterorthodonticretractionaprospectivestudy |