Long‐term changes in the anterior alveolar bone after orthodontic treatment with premolar extraction: a retrospective study

2021 ◽  
Author(s):  
Jingxi Wang ◽  
Wenwen Zhou ◽  
Yan Wu ◽  
Hongwei Dai ◽  
Zhou Jianping
Keyword(s):  
Retrospective Study ◽  
Orthodontic Treatment ◽  
Alveolar Bone ◽  
Premolar Extraction ◽  
Long Term Changes

Long-term changes in arch form after orthodontic treatment and retention

1995 ◽  
Vol 107 (5) ◽  
pp. 518-530 ◽  
Author(s):  
Andrés De la Cruz R ◽  
Paul Sampson ◽  
Robert M. Little ◽  
Jon Årtun ◽  
Peter A. Shapiro
Keyword(s):  
Orthodontic Treatment ◽  
Arch Form ◽  
Long Term Changes

scholarly journals Geometric analysis of alveolar bone around the incisors after anterior retraction following premolar extraction

2019 ◽  
Vol 90 (2) ◽  
pp. 173-180 ◽  
Author(s):  
Fan Zhang ◽  
Suk-Cheol Lee ◽  
Jun-Beom Lee ◽  
Kyung-Min Lee
Keyword(s):  
Orthodontic Treatment ◽  
Alveolar Bone ◽  
Shape Change ◽  
Geometric Analysis ◽  
Careful Consideration ◽  
Mandibular Incisor ◽  
Premolar Extraction ◽  
Significant Difference ◽  
Before And After ◽  
Mandibular Incisors

ABSTRACT Objective: To evaluate changes in shape and alterations in thickness and vertical marginal bone levels of the alveolar bone around the maxillary and mandibular incisors before and after orthodontic treatment with premolar extraction using geometric morphometric analysis. Materials and Methods: Thirty-six patients with Class I bialveolar protrusion who underwent orthodontic treatment with premolar extraction were included. Cone-beam computed tomographic scans were obtained from the patients before and after treatment. Five fixed landmarks and 70 semilandmarks were used to represent the morphology of the alveolar bone around the maxillary and mandibular incisors. The coordinates of the landmarks of the alveolar bones were generated by Procrustes fit. The labial and lingual alveolar bone thicknesses around the maxillary and mandibular incisors and vertical marginal bone level were assessed quantitatively. Results: There was a significant difference in shape change of the alveolar bone before and after treatment. The deformation grid of the thin plate spline showed that the thickness and vertical marginal bone decreased on the lingual side after treatment. Shape changes were greater for the lingual alveolar bone on the mandibular incisor than for the maxillary incisors. Conclusions: Orthodontic treatment with premolar extraction might cause loss of alveolar bone around the maxillary and mandibular incisors. Careful consideration is needed to avoid iatrogenic degeneration of periodontal support around the incisors, particularly in the lingual area.

Long-term evaluation of lower incisors gingival recessions after orthodontic treatment

2019 ◽  
Vol 41 (6) ◽  
pp. 559-564 ◽  
Author(s):  
Fabienne Pernet ◽  
Cristina Vento ◽  
Nikolaos Pandis ◽  
Stavros Kiliaridis
Keyword(s):  
Orthodontic Treatment ◽  
Alveolar Bone ◽  
Facial Morphology ◽  
Lower Incisor ◽  
Term Retention ◽  
Lateral Cephalograms ◽  
Skeletal Pattern ◽  
Long Term Retention ◽  
Lower Incisors

Summary Aim The development of gingival recessions has been associated with orthodontic treatment; however, a clear etiology is still unknown. The aim of the present study was to further clarify potential association between the development of labial and lingual recessions and inclination of the lower incisors during orthodontic treatment, vertical facial morphology, width of the alveolar bone process, height and width of their symphysis after orthodontic treatment and at long-term retention. Methods On dental casts and good quality lateral cephalograms of 126 orthodontically treated patients, relevant measurements were performed and gingival recessions were assessed and recorded before, immediately after treatment and at long-term retention. Results Taking into account the whole sample at three different occasions, on the buccal side, the lateral incisors have significantly less recessions than the central incisor. On the lingual side, tooth 32 presented with lower risk of recession compared to all other three incisors. No association was found between the width of the alveolar bone process at the apex (Wapex), at the level of the crest (Wcrest) and at mid of the root (Wmid), the width (D), the vertical skeletal pattern (AnsPns-Go’Me) and the onset of buccal or lingual recessions. Development of new recessions was clearly associated with males and with increasing age. The symphysis height (Me-Wcrest) was statistically related with the onset of lingual recessions on 32 and 42. The ratio between the symphysis height and the width at the crest level demonstrated a statistically significant association with the presence of buccal and lingual recessions. Excessive proclination (≥10°) of the lower incisors demonstrated an association with the onset of recessions in 25 per cent of the cases. Conclusion Based on the sample of this study, there is some evidence that increased symphysis height (Me-Wcrest), and ratio between the symphysis height and the width at the crest level as well as big change of lower incisor inclination during treatment are associated with the development of recessions.

Long-Term Prognosis of Severely Compromised Teeth Following Combined Periodontal and Orthodontic Treatment: A Retrospective Study

2020 ◽  
Vol 40 (1) ◽  
pp. 95-102
Author(s):  
Mario Aimetti ◽  
Daniela Garbo ◽  
Elena Ercoli ◽  
Maria Grigorie ◽  
Filippo Citterio ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Orthodontic Treatment ◽  
Long Term Prognosis
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