Changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment: A cephalometric and computed tomography comparative study
Objective: Evaluate the changes in alveolar bone as a result of maxillary and mandibular incisor retraction in patients with bimaxillary protrusion by means of using lateral cephalograms and computed tomography (CT) scans and to investigate any occurrence of bony defects like dehiscence and fenestra...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2013-01-01
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| Series: | Indian Journal of Dental Research |
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| Online Access: | http://www.ijdr.in/article.asp?issn=0970-9290;year=2013;volume=24;issue=6;spage=736;epage=741;aulast=Nayak |
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| author | U S Nayak Krishna Ashutosh Shetty M P Girija Reshma Nayak |
| author_facet | U S Nayak Krishna Ashutosh Shetty M P Girija Reshma Nayak |
| author_sort | U S Nayak Krishna |
| collection | DOAJ |
| description | Objective: Evaluate the changes in alveolar bone as a result of maxillary and mandibular incisor retraction in patients with bimaxillary protrusion by means of using lateral cephalograms and computed tomography (CT) scans and to investigate any occurrence of bony defects like dehiscence and fenestration.
Subjects and Methods: Ten patients (age 15 ± 3 years) with bimaxillary protrusion treated by extraction of four first premolars were investigated by lateral cephalograms and CT scans during pre-treatment (T1) and after 3 months of completion of incisor retraction (T2). The labial and lingual cortex of all the incisors were assessed on the CT scan with measurements taken at site adjacent to widest point of the labiolingual root in three slices separated by 3 mm at crest level (S1), mid root level (S2), and apical level (S3).
Result: In the mandibular arch, after lingual movement of the incisors, the bone labial to the anterior teeth decreased in thickness at the coronal level of the left lateral and left central incisors. Left lateral incisor showed significant changes in all the three levels. In the maxilla the change in the labial bone thickness was not statistically significant. Lingual bone of all the incisors showed significant changes in S1 level and S3 levels. Few patients demonstrated bone dehiscence that was not visible macroscopically or cephalometrically.
Conclusions: When incisors are retracted, the risk of adverse effect is present. This must be carefully monitored to avoid negative iatrogenic effects. This study needs follow up after 6 months or 1 year after completion of the orthodontic treatment to assess the long-term consequences. |
| first_indexed | 2024-12-23T06:44:06Z |
| format | Article |
| id | doaj.art-4baa1a9c87b94e6cbe81104b01095d1d |
| institution | Directory Open Access Journal |
| issn | 0970-9290 1998-3603 |
| language | English |
| last_indexed | 2024-12-23T06:44:06Z |
| publishDate | 2013-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Indian Journal of Dental Research |
| spelling | doaj.art-4baa1a9c87b94e6cbe81104b01095d1d2022-12-21T17:56:38ZengWolters Kluwer Medknow PublicationsIndian Journal of Dental Research0970-92901998-36032013-01-0124673674110.4103/0970-9290.127623Changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment: A cephalometric and computed tomography comparative studyU S Nayak KrishnaAshutosh ShettyM P GirijaReshma NayakObjective: Evaluate the changes in alveolar bone as a result of maxillary and mandibular incisor retraction in patients with bimaxillary protrusion by means of using lateral cephalograms and computed tomography (CT) scans and to investigate any occurrence of bony defects like dehiscence and fenestration. Subjects and Methods: Ten patients (age 15 ± 3 years) with bimaxillary protrusion treated by extraction of four first premolars were investigated by lateral cephalograms and CT scans during pre-treatment (T1) and after 3 months of completion of incisor retraction (T2). The labial and lingual cortex of all the incisors were assessed on the CT scan with measurements taken at site adjacent to widest point of the labiolingual root in three slices separated by 3 mm at crest level (S1), mid root level (S2), and apical level (S3). Result: In the mandibular arch, after lingual movement of the incisors, the bone labial to the anterior teeth decreased in thickness at the coronal level of the left lateral and left central incisors. Left lateral incisor showed significant changes in all the three levels. In the maxilla the change in the labial bone thickness was not statistically significant. Lingual bone of all the incisors showed significant changes in S1 level and S3 levels. Few patients demonstrated bone dehiscence that was not visible macroscopically or cephalometrically. Conclusions: When incisors are retracted, the risk of adverse effect is present. This must be carefully monitored to avoid negative iatrogenic effects. This study needs follow up after 6 months or 1 year after completion of the orthodontic treatment to assess the long-term consequences.http://www.ijdr.in/article.asp?issn=0970-9290;year=2013;volume=24;issue=6;spage=736;epage=741;aulast=NayakAlveolar bone thicknesscomputed tomographydehiscenceorthodontic treatmentretraction |
| spellingShingle | U S Nayak Krishna Ashutosh Shetty M P Girija Reshma Nayak Changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment: A cephalometric and computed tomography comparative study Indian Journal of Dental Research Alveolar bone thickness computed tomography dehiscence orthodontic treatment retraction |
| title | Changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment: A cephalometric and computed tomography comparative study |
| title_full | Changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment: A cephalometric and computed tomography comparative study |
| title_fullStr | Changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment: A cephalometric and computed tomography comparative study |
| title_full_unstemmed | Changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment: A cephalometric and computed tomography comparative study |
| title_short | Changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment: A cephalometric and computed tomography comparative study |
| title_sort | changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment a cephalometric and computed tomography comparative study |
| topic | Alveolar bone thickness computed tomography dehiscence orthodontic treatment retraction |
| url | http://www.ijdr.in/article.asp?issn=0970-9290;year=2013;volume=24;issue=6;spage=736;epage=741;aulast=Nayak |
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