The Influence of Anatomical Characteristics and Orthodontic Force on Pulpal Oxygen Saturation: A Clinical Study Using Cone-Beam Computed Tomography (CBCT)
The primary objective of this clinical protocol is to evaluate and compare the physiological responses of dental pulp to two different magnitudes of orthodontic force during active orthodontic treatment. Participants are assigned to either a 150g orthodontic force group (experimental group) or a 50g orthodontic force group (active comparator group).
Orthodontic Force Application: A continuous orthodontic force of approximately 150g is applied to the target teeth in the experimental group, whereas a continuous force of approximately 50g is applied to the target teeth in the active comparator group. The magnitude of the applied force is verified using a tension gauge to ensure standardized force delivery.
Pulse Oximetry (SpO₂) Measurement: Pulp oxygen saturation (SpO₂) is assessed using the same standardized protocol in both groups. The target teeth are isolated with cotton rolls to control moisture, and the dental chair light is turned off to minimize optical interference with the pulse oximeter. Three consecutive measurements are obtained at each assessment time point, and the mean value is recorded for analysis.
This standardized protocol enables comparison of pulp oxygen saturation responses between teeth subjected to 150g and 50g orthodontic forces while minimizing variability related to force application and measurement procedures.
研究概览
研究类型
注册 (实际的)
阶段
- 不适用
联系人和位置
学习地点
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Can Tho、越南、900000
- Can Tho University of Medicine and Pharmacy
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参与标准
资格标准
适合学习的年龄
- 孩子
- 成人
接受健康志愿者
描述
Inclusion Criteria:
- Patients aged between 15 and 35 years old.
- Patients undergoing routine fixed orthodontic treatment with indications for premolar extractions and subsequent canine retraction phase.
- Target canines must be vital with healthy dental pulp and no periapical pathology.
- Pre-existing Cone-Beam Computed Tomography (CBCT) scans of acceptable diagnostic quality available in the patient's records, taken prior to the canine retraction phase.
- Patient or legal guardian provides written informed consent to participate in the study.
Exclusion Criteria:
- Target canines with a history of dental trauma, extensive caries, periodontal disease, or previous endodontic treatment.
- Patients with systemic diseases affecting peripheral blood circulation or microvasculature (e.g., cardiovascular diseases, severe anemia, diabetes, chronic respiratory conditions).
- Patients currently using systemic vasoconstrictors or anti-inflammatory medications during the active monitoring period.
- Pregnancy or lactation.
- Refusal to sign the informed consent form.
学习计划
研究是如何设计的？
设计细节
- 主要用途：诊断
- 分配：随机化
- 介入模型：交叉作业
- 屏蔽：单身的
武器和干预
参与者组/臂 |
干预/治疗 |
|---|---|
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实验性的：150g Orthodontic Force Group
Participants in this group receive a controlled orthodontic force of approximately 150 g applied to the target teeth.
The applied force is verified using a tension gauge.
Pulp oxygen saturation (SpO₂) is assessed at predefined time points.
At each assessment, three consecutive measurements are obtained under moisture isolation with the dental chair light turned off to minimize optical interference, and the mean SpO₂ value is recorded.
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A controlled mechanical orthodontic force of approximately 150g is applied to the target teeth and verified using a tension gauge.
The force is applied to induce orthodontic tooth movement, and pulp oxygen saturation (SpO₂) is monitored at predefined follow-up time points.
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有源比较器：50g Orthodontic Force Group
Participants in this group receive a controlled orthodontic force of approximately 50 g applied to the target teeth.
The applied force is verified using a tension gauge.
Pulp oxygen saturation (SpO₂) is assessed at the same predefined time points and using the same standardized measurement protocol as in the 150-g group.
Three consecutive measurements are obtained at each assessment, and the mean SpO₂ value is recorded.
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A controlled mechanical orthodontic force of approximately 50g is applied to the target teeth and verified using a tension gauge.
The force serves as the active comparator, and pulp oxygen saturation (SpO₂) is monitored at the same predefined follow-up time points as in the 150g group.
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研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Changes in Dental Pulp Oxygen Saturation (SpO2) Levels
大体时间：Baseline (pre-force), 20 minutes, 24 hours, 7 days, and 4 weeks post-force application
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Dental pulp oxygen saturation levels are measured in percentages (%) using a customized pulse oximeter probe adapted for dental use.
The objective is to evaluate the physiological microcirculatory response of the canine pulp following orthodontic force application.
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Baseline (pre-force), 20 minutes, 24 hours, 7 days, and 4 weeks post-force application
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Alveolar Bone and Root Anatomical Measurements on CBCT
大体时间：Baseline (at the time of the pre-existing CBCT scan prior to the canine retraction phase)
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Three-dimensional anatomical variables are measured secondarily from pre-existing Cone-Beam Computed Tomography (CBCT) scans using specialized imaging software.
Variables include cortical bone thickness (mm) at the canine apex region, root apex-to-cortical plate distance (mm), and total root length (mm).
These baseline metrics will be correlated with the observed SpO2 changes.
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Baseline (at the time of the pre-existing CBCT scan prior to the canine retraction phase)
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合作者和调查者
调查人员
- 首席研究员：Lam Nguyen Le, Assoc. Prof.、Faculty of Odonto-Stomatology, Can Tho University of Medicine and Pharmacy
研究记录日期
研究主要日期
学习开始 (实际的)
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (实际的)
研究记录更新
最后更新发布 (实际的)
上次提交的符合 QC 标准的更新
最后验证
更多信息
与本研究相关的术语
其他研究编号
- Prof. Le Nguyen Lam
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