Comparative treatment outcomes after bilateral extractions of maxillary second molars or first premolars in patients with class II malocclusion: a retrospective study
Abstract Background This retrospective cohort study aimed to compare treatment results between bilateral extraction of upper second molars (M2) and first premolars (P1) in terms of treatment timing, cephalometry, upper third molar alignment and relapse in the long-term. Methods Fifty-three consecuti...
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| Format: | Article |
| Language: | English |
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BMC
2023-03-01
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| Series: | Head & Face Medicine |
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| Online Access: | https://doi.org/10.1186/s13005-023-00353-6 |
| _version_ | 1797863418159431680 |
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| author | Eva Paddenberg Maria Christina Braun Peter Proff Carsten Lippold Christian Kirschneck |
| author_facet | Eva Paddenberg Maria Christina Braun Peter Proff Carsten Lippold Christian Kirschneck |
| author_sort | Eva Paddenberg |
| collection | DOAJ |
| description | Abstract Background This retrospective cohort study aimed to compare treatment results between bilateral extraction of upper second molars (M2) and first premolars (P1) in terms of treatment timing, cephalometry, upper third molar alignment and relapse in the long-term. Methods Fifty-three consecutively treated Caucasian patients with a brachyfacial pattern, skeletal class I and dental class II requiring extraction in the maxilla due to crowding were retrospectively divided into group I (M2 extracted; N = 31) and II (P1 extracted; N = 22). Fixed appliances were inserted after extraction and after distalisation of the first molars in group I. Post-treatment lateral cephalograms were digitally analysed and compared between groups. Six to seven years later relapse and success of upper third molar alignment were clinically evaluated as well as orthodontic treatment duration, pre-treatment age and gender recorded. Results After debonding patients with second molar extraction showed significantly smaller values for the Wits-appraisal, but higher values for index and facial axis. Extracting first premolars caused significantly more retroinclination/−position of anterior teeth and an increased profile concavity, more relapse and less successful alignment of upper third molars. Orthodontic treatment duration, pre-treatment age and gender were not significantly different between groups. Conclusions Bilateral extraction of upper first premolars or second molars may solve dental crowding in skeletal class I dental class II patients with a brachyfacial growth pattern. Upper second molar extraction seems to affect maxillary third molar alignment, long-term stability and dental and soft-tissue cephalometric parameters positively, but no intervention proved to be clearly superior. |
| first_indexed | 2024-04-09T22:36:19Z |
| format | Article |
| id | doaj.art-aa5843b2632048d894eb8719d0c1dc63 |
| institution | Directory Open Access Journal |
| issn | 1746-160X |
| language | English |
| last_indexed | 2024-04-09T22:36:19Z |
| publishDate | 2023-03-01 |
| publisher | BMC |
| record_format | Article |
| series | Head & Face Medicine |
| spelling | doaj.art-aa5843b2632048d894eb8719d0c1dc632023-03-22T12:30:03ZengBMCHead & Face Medicine1746-160X2023-03-011911910.1186/s13005-023-00353-6Comparative treatment outcomes after bilateral extractions of maxillary second molars or first premolars in patients with class II malocclusion: a retrospective studyEva Paddenberg0Maria Christina Braun1Peter Proff2Carsten Lippold3Christian Kirschneck4Department of Orthodontics, University Hospital RegensburgDepartment of Orthodontics, University Hospital RegensburgDepartment of Orthodontics, University Hospital RegensburgDepartment of Orthodontics, University of MuensterDepartment of Orthodontics, University of MuensterAbstract Background This retrospective cohort study aimed to compare treatment results between bilateral extraction of upper second molars (M2) and first premolars (P1) in terms of treatment timing, cephalometry, upper third molar alignment and relapse in the long-term. Methods Fifty-three consecutively treated Caucasian patients with a brachyfacial pattern, skeletal class I and dental class II requiring extraction in the maxilla due to crowding were retrospectively divided into group I (M2 extracted; N = 31) and II (P1 extracted; N = 22). Fixed appliances were inserted after extraction and after distalisation of the first molars in group I. Post-treatment lateral cephalograms were digitally analysed and compared between groups. Six to seven years later relapse and success of upper third molar alignment were clinically evaluated as well as orthodontic treatment duration, pre-treatment age and gender recorded. Results After debonding patients with second molar extraction showed significantly smaller values for the Wits-appraisal, but higher values for index and facial axis. Extracting first premolars caused significantly more retroinclination/−position of anterior teeth and an increased profile concavity, more relapse and less successful alignment of upper third molars. Orthodontic treatment duration, pre-treatment age and gender were not significantly different between groups. Conclusions Bilateral extraction of upper first premolars or second molars may solve dental crowding in skeletal class I dental class II patients with a brachyfacial growth pattern. Upper second molar extraction seems to affect maxillary third molar alignment, long-term stability and dental and soft-tissue cephalometric parameters positively, but no intervention proved to be clearly superior.https://doi.org/10.1186/s13005-023-00353-6ExtractionOrthodontic treatment resultsStabilitySkeletal class IAngle class IIBrachyfacial growth pattern |
| spellingShingle | Eva Paddenberg Maria Christina Braun Peter Proff Carsten Lippold Christian Kirschneck Comparative treatment outcomes after bilateral extractions of maxillary second molars or first premolars in patients with class II malocclusion: a retrospective study Head & Face Medicine Extraction Orthodontic treatment results Stability Skeletal class I Angle class II Brachyfacial growth pattern |
| title | Comparative treatment outcomes after bilateral extractions of maxillary second molars or first premolars in patients with class II malocclusion: a retrospective study |
| title_full | Comparative treatment outcomes after bilateral extractions of maxillary second molars or first premolars in patients with class II malocclusion: a retrospective study |
| title_fullStr | Comparative treatment outcomes after bilateral extractions of maxillary second molars or first premolars in patients with class II malocclusion: a retrospective study |
| title_full_unstemmed | Comparative treatment outcomes after bilateral extractions of maxillary second molars or first premolars in patients with class II malocclusion: a retrospective study |
| title_short | Comparative treatment outcomes after bilateral extractions of maxillary second molars or first premolars in patients with class II malocclusion: a retrospective study |
| title_sort | comparative treatment outcomes after bilateral extractions of maxillary second molars or first premolars in patients with class ii malocclusion a retrospective study |
| topic | Extraction Orthodontic treatment results Stability Skeletal class I Angle class II Brachyfacial growth pattern |
| url | https://doi.org/10.1186/s13005-023-00353-6 |
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