Morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patients
Abstract Background Bialveolar protrusion is one of the most common chief complaints from the Asian orthodontic patients. Typical orthodontic treatment includes extraction of the bimaxillary premolars and en mass retraction of anterior tooth with maximum anchorage by placing miniscrews. However, exc...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2020-07-01
|
| Series: | Head & Face Medicine |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s13005-020-00229-z |
| _version_ | 1818116928802127872 |
|---|---|
| author | Yu Chen Dongxu Liu |
| author_facet | Yu Chen Dongxu Liu |
| author_sort | Yu Chen |
| collection | DOAJ |
| description | Abstract Background Bialveolar protrusion is one of the most common chief complaints from the Asian orthodontic patients. Typical orthodontic treatment includes extraction of the bimaxillary premolars and en mass retraction of anterior tooth with maximum anchorage by placing miniscrews. However, excessive pursuit of profile improvement by retraction and intrusion of anterior teeth may result in root resorption, alveolar bone loss, even dehiscence. Thus this retrospective, analytical study was to evaluate the root resorption of anterior teeth after miniscrew assisted en mass retraction in adult bialveolar protrusion patients. Materials and methods Thirty six adult patients with bimaxillary protrusion had four first premolars extracted, and then miniscrews were placed to provide anchorage. CBCT scans were performed before (T1) and posttreatment (T2). A new improvement project introduced for 3D CBCT registration assessment of root morphology. The paired t-test was used to compare changes from T1 to T2. The relationship between the root resorption and the movement of anterior teeth were assessed by Pearson correlation coefficient analysis. Results The significant differences were only found in apical third of root and the largest resorption in apical third of the root is always noted in the palatal and distal sectors. Significant correlations were observed in the loss of root in distal and palatal sectors, the root length and volume decrease with the amount of anterior teeth retraction and intrusion. Conclusion The new 3D registration assessment of root morphology will be helpful for the clinicians. Pursuit of large retraction and intrusion leads to obvious anterior teeth root resorption. |
| first_indexed | 2024-12-11T04:30:19Z |
| format | Article |
| id | doaj.art-730050ac5b864c6c950ca8d75e07ea5d |
| institution | Directory Open Access Journal |
| issn | 1746-160X |
| language | English |
| last_indexed | 2024-12-11T04:30:19Z |
| publishDate | 2020-07-01 |
| publisher | BMC |
| record_format | Article |
| series | Head & Face Medicine |
| spelling | doaj.art-730050ac5b864c6c950ca8d75e07ea5d2022-12-22T01:20:54ZengBMCHead & Face Medicine1746-160X2020-07-011611910.1186/s13005-020-00229-zMorphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patientsYu Chen0Dongxu Liu1Department of Stomatology, School of Medicine, Xiamen UniversityDepartment of Orthodontics, School and Hospital of Stomatology, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationAbstract Background Bialveolar protrusion is one of the most common chief complaints from the Asian orthodontic patients. Typical orthodontic treatment includes extraction of the bimaxillary premolars and en mass retraction of anterior tooth with maximum anchorage by placing miniscrews. However, excessive pursuit of profile improvement by retraction and intrusion of anterior teeth may result in root resorption, alveolar bone loss, even dehiscence. Thus this retrospective, analytical study was to evaluate the root resorption of anterior teeth after miniscrew assisted en mass retraction in adult bialveolar protrusion patients. Materials and methods Thirty six adult patients with bimaxillary protrusion had four first premolars extracted, and then miniscrews were placed to provide anchorage. CBCT scans were performed before (T1) and posttreatment (T2). A new improvement project introduced for 3D CBCT registration assessment of root morphology. The paired t-test was used to compare changes from T1 to T2. The relationship between the root resorption and the movement of anterior teeth were assessed by Pearson correlation coefficient analysis. Results The significant differences were only found in apical third of root and the largest resorption in apical third of the root is always noted in the palatal and distal sectors. Significant correlations were observed in the loss of root in distal and palatal sectors, the root length and volume decrease with the amount of anterior teeth retraction and intrusion. Conclusion The new 3D registration assessment of root morphology will be helpful for the clinicians. Pursuit of large retraction and intrusion leads to obvious anterior teeth root resorption.http://link.springer.com/article/10.1186/s13005-020-00229-zOrthodontically induced root resorption (OIRR)En mass retractionBimaxillary protrusionCone beam computer tomography (CBCT)3D registration |
| spellingShingle | Yu Chen Dongxu Liu Morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patients Head & Face Medicine Orthodontically induced root resorption (OIRR) En mass retraction Bimaxillary protrusion Cone beam computer tomography (CBCT) 3D registration |
| title | Morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patients |
| title_full | Morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patients |
| title_fullStr | Morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patients |
| title_full_unstemmed | Morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patients |
| title_short | Morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patients |
| title_sort | morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patients |
| topic | Orthodontically induced root resorption (OIRR) En mass retraction Bimaxillary protrusion Cone beam computer tomography (CBCT) 3D registration |
| url | http://link.springer.com/article/10.1186/s13005-020-00229-z |
| work_keys_str_mv | AT yuchen morphologicevaluationofrootresorptionafterminiscrewassistedenmassretractioninadultbialveolarprotrusionpatients AT dongxuliu morphologicevaluationofrootresorptionafterminiscrewassistedenmassretractioninadultbialveolarprotrusionpatients |