Volumetric Efficacy of Alveolar Ridge Preservation (ARP)
Comparative Efficacy of Three Alveolar Ridge Preservation Techniques for Volumetric Tissue Maintenance Following Tooth Extraction
The goal of this clinical trial is to compare the effectiveness of four post-extraction socket management approaches in preserving alveolar ridge dimensions following tooth extraction in adults requiring implant-supported rehabilitation in posterior regions.
The main questions it aims to answer are:
- Which treatment approach provides the greatest preservation of hard- and soft-tissue dimensions 12 weeks after tooth extraction?
- Does the use of a dense polytetrafluoroethylene (d-PTFE) membrane improve alveolar ridge preservation compared with approaches that do not use a membrane?
- Are there differences among the treatment groups regarding postoperative healing, complications, pain, and bone regeneration?
Researchers will compare spontaneous socket healing, autologous blood clot with d-PTFE membrane, autologous blood clot with leukocyte- and platelet-rich fibrin (L-PRF), and autologous blood clot with L-PRF plus d-PTFE membrane to determine which approach provides the best preservation of alveolar ridge dimensions and tissue healing.
Participants will:
- Undergo tooth extraction and be randomly assigned to one of four treatment groups.
- Receive clinical examinations, intraoral scans, photographs, and cone-beam computed tomography (CBCT) imaging at scheduled follow-up visits.
- Complete assessments of postoperative pain and oral health-related quality of life.
- Undergo implant placement 12 weeks after tooth extraction, including collection of a bone biopsy for histomorphometric analysis.
- Attend follow-up visits to evaluate peri-implant tissue health, marginal bone stability, and implant success up to 24 months after implant loading.
研究概览
地位
详细说明
Alveolar ridge dimensional changes following tooth extraction are a well-documented biological phenomenon that may compromise future implant placement and prosthetic rehabilitation. These alterations are primarily associated with physiological bone modeling and remodeling processes, particularly affecting the buccal bone plate, which is often thin and highly susceptible to post-extraction resorption.
Alveolar ridge preservation (ARP) procedures have been developed to reduce post-extraction hard- and soft-tissue volume loss. Numerous techniques have been described, including the use of barrier membranes, platelet concentrates, and grafting materials. However, substantial controversy remains regarding the necessity of membrane utilization, the role of leukocyte- and platelet-rich fibrin (L-PRF), and the optimal approach for maintaining alveolar ridge dimensions while minimizing treatment complexity and costs.
Dense polytetrafluoroethylene (d-PTFE) membranes have been proposed as an effective barrier for preserving extraction socket architecture, whereas L-PRF has been suggested to enhance soft-tissue healing and tissue regeneration through the release of autologous growth factors. Despite the widespread clinical use of both approaches, evidence comparing these treatment strategies remains limited.
This randomized controlled clinical trial aims to compare four post-extraction socket management protocols: spontaneous healing, autologous blood clot combined with a d-PTFE membrane, autologous blood clot combined with L-PRF, and autologous blood clot combined with both L-PRF and a d-PTFE membrane. The study will evaluate their effects on hard- and soft-tissue dimensional preservation, clinical healing, postoperative outcomes, histomorphometric bone formation, patient-reported quality of life, and long-term implant-related outcomes.
The findings of this study are expected to contribute to the development of evidence-based protocols for alveolar ridge preservation and to improve clinical decision-making in implant dentistry.
研究类型
注册 (估计的)
阶段
- 不适用
联系人和位置
学习联系方式
- 姓名：Claudio M Claudio Miranda, DDS, Director
- 电话号码：+56 (2) 2327 9110
- 邮箱：clmirandacar@gmail.com
研究联系人备份
- 姓名：Dusan M Dusan Marinkovic, DDS
- 电话号码：+56 (2) 2327 5256
- 邮箱：dusan.marinkovic@udd.cl
学习地点
-
-
Santiago Metropolitan
-
Santiago、Santiago Metropolitan、智利、7610315
- 招聘中
- Universidad del Desarrollo (UDD)
-
接触：
- Claudio m Claudio miranda, dds
- 电话号码：+56 (2) 2327 9110
- 邮箱：clmirandacar@gmail.com
-
接触：
- Dusan M Marinkovic, DDS
- 电话号码：+56 (2) 2327 9110
- 邮箱：dusan.marinkovic@udd.cl
-
首席研究员：
- Claudio M Miranda, DDS
-
副研究员：
- Francisca c Collao, DDS
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副研究员：
- Dusan M Marinkovic, DDS
-
-
参与标准
资格标准
适合学习的年龄
- 成人
- 年长者
接受健康志愿者
描述
Inclusion Criteria:
- Adults aged 18 years or older.
- Requirement for tooth extraction with the possibility of subsequent implant-supported rehabilitation in the maxillary or mandibular premolar or molar regions.
- Extraction sockets classified as Class I to Class Va according to the modified Cardaropoli classification.
- American Society of Anesthesiologists (ASA) Physical Status I or II.
- Ability to understand the study procedures and provide written informed consent.
Exclusion Criteria:
- Current treatment with bisphosphonates or systemic corticosteroids.
- History of head and neck radiotherapy.
- Metabolic bone disorders.
- Teeth presenting with acute infectious pathology at the time of extraction.
- Pregnancy or breastfeeding.
- Inability or unwillingness to attend scheduled follow-up visits.
- Any medical or psychological condition that, in the opinion of the investigators, could interfere with study participation or data interpretation.
学习计划
研究是如何设计的？
设计细节
- 主要用途：治疗
- 分配：随机化
- 介入模型：并行分配
- 屏蔽：单身的
武器和干预
参与者组/臂 |
干预/治疗 |
|---|---|
|
有源比较器：Spontaneous Healing
Following atraumatic tooth extraction, the socket is left to heal spontaneously without the use of alveolar ridge preservation materials or barrier membranes.
|
Following atraumatic tooth extraction, the extraction socket is left to heal naturally without the use of alveolar ridge preservation materials, grafting biomaterials, platelet concentrates, or barrier membranes.
Healing occurs through spontaneous blood clot formation and physiological post-extraction tissue repair.
其他名称：
|
|
实验性的：Arm 2: Blood Clot + d-PTFE Membrane
Following atraumatic tooth extraction, the socket is allowed to fill with an autologous blood clot and is covered with a dense polytetrafluoroethylene (d-PTFE) membrane to promote alveolar ridge preservation.
|
Following atraumatic tooth extraction, the socket is allowed to fill with an autologous blood clot and is covered with a dense polytetrafluoroethylene (d-PTFE) membrane to protect the socket and support alveolar ridge preservation during healing
|
|
实验性的：Arm 3: Blood Clot + L-PRF
Following atraumatic tooth extraction, the socket is treated with autologous leukocyte- and platelet-rich fibrin (L-PRF) in combination with the natural blood clot to support tissue healing and alveolar ridge preservation.
|
Following atraumatic tooth extraction, the socket is allowed to fill with an autologous blood clot and is covered with a dense polytetrafluoroethylene (d-PTFE) membrane to protect the socket and support alveolar ridge preservation during healing
Autologous leukocyte- and platelet-rich fibrin (L-PRF) prepared from the participant's peripheral blood and placed within the extraction socket to promote tissue healing and support alveolar ridge preservation through the sustained release of growth factors.
其他名称：
|
|
实验性的：Blood Clot + L-PRF + d-PTFE Membrane
Following atraumatic tooth extraction, the socket is treated with autologous leukocyte- and platelet-rich fibrin (L-PRF) and covered with a dense polytetrafluoroethylene (d-PTFE) membrane to enhance tissue healing and alveolar ridge preservation.
|
Autologous leukocyte- and platelet-rich fibrin (L-PRF) prepared from the participant's peripheral blood and placed within the extraction socket to promote tissue healing and support alveolar ridge preservation through the sustained release of growth factors.
其他名称：
|
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 |
|---|---|---|
|
Change in Alveolar Ridge Dimensions
大体时间：12 weeks after tooth extraction
|
Change in hard- and soft-tissue dimensions of the extraction site between baseline (T1) and 12 weeks after tooth extraction (T3), assessed through three-dimensional volumetric analysis using superimposed CBCT and intraoral scan datasets.
Hard-tissue measurements include horizontal ridge width at 1, 3, and 5 mm apical to the alveolar crest (HW-1, HW-3, HW-5), buccal plate width, and socket depth.
Soft-tissue measurements include tissue thickness at 1, 3, and 5 mm apical to the alveolar crest (TH-1, TH-3, TH-5) and total occlusal soft-tissue height.
|
12 weeks after tooth extraction
|
次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
|
Histomorphometric Bone Formation
大体时间：12 weeks after tooth extraction
|
Percentage of newly formed bone, residual biomaterial, and connective tissue/marrow spaces measured in bone biopsy specimens obtained during implant placement.
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12 weeks after tooth extraction
|
|
Postoperative Pain
大体时间：21 days after tooth extraction
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Patient-reported postoperative pain assessed using a 100-mm Visual Analogue Scale (VAS).
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21 days after tooth extraction
|
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Postoperative Complications
大体时间：Up to 12 weeks after tooth extraction
|
Frequency and severity of soft-tissue dehiscence, membrane exposure or displacement, localized infection, and uncontrolled acute pain.
|
Up to 12 weeks after tooth extraction
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Keratinized Tissue Width
大体时间：Baseline to 12 weeks after tooth extraction
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Change in the width of keratinized tissue measured clinically in millimeters.
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Baseline to 12 weeks after tooth extraction
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Oral Health-Related Quality of Life
大体时间：Baseline to 24-28 weeks after tooth extraction
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Change in Oral Health Impact Profile (OHIP-14) scores between baseline and definitive implant-supported restoration.
|
Baseline to 24-28 weeks after tooth extraction
|
|
Bleeding on probing
大体时间：12 and 24 months after implant loading
|
Percentage of peri-implant sites presenting bleeding on probing.
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12 and 24 months after implant loading
|
|
Peri-implant probing depth
大体时间：12 and 24 months after implant loading
|
Mean peri-implant probing depth measured in millimeters using a calibrated periodontal probe.
|
12 and 24 months after implant loading
|
|
Radiographic marginal bone level
大体时间：12 and 24 months after implant loading
|
Mean marginal bone level measured radiographically in millimeters around implants.
|
12 and 24 months after implant loading
|
合作者和调查者
调查人员
- 研究主任：Francisca c Collao, DDS、Universidad del Desarrollo
- 首席研究员：Claudio M Miranda, dds、Universidad del Desarrollo
- 学习椅：Dusan M Marinkovic, DDS、Universidad del Desarrollo
出版物和有用的链接
一般刊物
- Marinkovic D, Collao F, Tello C, Miranda C, et al. (2025) Alveolar Ridge Preservation Using Clot and Dense Polytetrafluoroethylene Membrane (PTFE-d): A Novel Surgical Protocol and Clinical Case Report. Int J Oral Dent Health 11:173 doi.org/110.23937/2469-5734/1510173
研究记录日期
研究主要日期
学习开始 (估计的)
初级完成 (估计的)
研究完成 (估计的)
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
关键字
其他相关的 MeSH 术语
其他研究编号
- 2025-115
- IDREF Research Grants (其他赠款/资助编号：International Congress of Oral Implantologists)
计划个人参与者数据 (IPD)
计划共享个人参与者数据 (IPD)？
IPD 计划说明
药物和器械信息、研究文件
研究美国 FDA 监管的药品
研究美国 FDA 监管的设备产品
在美国制造并从美国出口的产品
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