What does this research mean for the field?

A cortical bone thickness threshold of ≥4.9 mm at the second molar region, along with larger device diameter and higher insertion torque, significantly improves the success and survival rates of temporary anchorage devices in the mandibular buccal shelf. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the clinical success rate of temporary anchorage devices in the mandibular buccal shelf and determine optimal cortical and total bone thickness thresholds using cone beam computed tomography.

August 30, 2026CureusOpen Access

Cortical Bone Thickness and Success of Temporary Anchorage Devices in the Mandibular Buccal Shelf: A Retrospective Cone Beam Computed Tomography Study

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Authors

SMSushil Bhagwan Mahajan VBVinay V Bedre TSTrilok Shrivastav

Discussion

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Implication

Retrospective cohort study reveals cortical bone thickness predicts temporary anchorage device success in orthodontic patients, suggesting preoperative computed tomography enhances placement planning.

Key Points

To evaluate the clinical success rate of temporary anchorage devices in the mandibular buccal shelf and determine optimal cortical and total bone thickness thresholds using cone beam computed tomography.
Retrospective cohort study analyzing 90 patients aged 18–35 years with average growth patterns who received 180 bilateral temporary anchorage devices in the mandibular buccal shelf.
Cone beam computed tomography scans were evaluated by two calibrated examiners to measure cortical and total bone thickness and cortical-to-cancellous ratios at 4, 8, and 12 mm from the cementoenamel junction.
Predictive capacity and survival were evaluated using receiver operating characteristic curves, binary logistic regression, and Kaplan-Meier analysis.
The overall success rate of temporary anchorage devices was 82.2% (148/180), with the second molar region at 8 mm depth exhibiting the greatest cortical thickness (5.1 ± 1.3 mm) and highest predictive accuracy (AUC = 0.82).
A cortical bone thickness threshold of ≥4.9 mm at this site achieved a 93.6% success rate and a 24-week survival rate of 96.9% compared to 72.0% below the threshold (log-rank p < 0.001).
Device success was significantly associated with larger screw diameter (2.1 ± 0.3 mm vs 1.8 ± 0.4 mm) and higher insertion torque (24.1 ± 5.2 Ncm vs 15.8 ± 4.5 Ncm).

Cite This Study

Mahajan et al. (2026) studied this question.

synapsesocial.com/papers/6a93f02f6c1a8fb52e79c2b3 https://doi.org/10.7759/cureus.115283

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August 30, 2026CureusOpen Access

Cortical Bone Thickness and Success of Temporary Anchorage Devices in the Mandibular Buccal Shelf: A Retrospective Cone Beam Computed Tomography Study

View Full Paper

Ask AI

Bookmark

Authors

SMSushil Bhagwan Mahajan VBVinay V Bedre TSTrilok Shrivastav

Discussion

Member takes

Implication

Key Points

To evaluate the clinical success rate of temporary anchorage devices in the mandibular buccal shelf and determine optimal cortical and total bone thickness thresholds using cone beam computed tomography.
Retrospective cohort study analyzing 90 patients aged 18–35 years with average growth patterns who received 180 bilateral temporary anchorage devices in the mandibular buccal shelf.
Cone beam computed tomography scans were evaluated by two calibrated examiners to measure cortical and total bone thickness and cortical-to-cancellous ratios at 4, 8, and 12 mm from the cementoenamel junction.
Predictive capacity and survival were evaluated using receiver operating characteristic curves, binary logistic regression, and Kaplan-Meier analysis.
The overall success rate of temporary anchorage devices was 82.2% (148/180), with the second molar region at 8 mm depth exhibiting the greatest cortical thickness (5.1 ± 1.3 mm) and highest predictive accuracy (AUC = 0.82).
A cortical bone thickness threshold of ≥4.9 mm at this site achieved a 93.6% success rate and a 24-week survival rate of 96.9% compared to 72.0% below the threshold (log-rank p < 0.001).
Device success was significantly associated with larger screw diameter (2.1 ± 0.3 mm vs 1.8 ± 0.4 mm) and higher insertion torque (24.1 ± 5.2 Ncm vs 15.8 ± 4.5 Ncm).

Cite This Study

Mahajan et al. (2026) studied this question.

synapsesocial.com/papers/6a93f02f6c1a8fb52e79c2b3 https://doi.org/10.7759/cureus.115283

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