Department of Advanced General Dentistry, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
PLoS One. 2024 Sep 5;19(9):e0308158. doi: 10.1371/journal.pone.0308158. eCollection 2024.
The demand for immediate implant placement (IIP) in the esthetic zone is rapidly increasing. Despite the treatment's benefits, the sagittal root position often dictates implant angulation, commonly necessitating the use of cement-retained restorations. This study investigates the impact of angulated screw channel on IIP in the esthetic zone.
The purpose of this cone-beam computed tomography (CBCT) study was to determine the probability of IIP in the esthetic zone, using four different implant angulations.
A retrospective review of CBCT images was conducted and accessed on 9 June 2021. The midsagittal images of maxillary anterior teeth were input into an implant planning software (Implant Studio®). Bone Level X Straumann® implant (BLX 3.5, 3.75, 4.0, 4.5, 5.0 mm) and Bone Level Tapered implant (BLT 2.9, 3.3 mm) were selected for 3D implant planning of IIP in the esthetic zone. The frequency distribution and probability of IIP were recorded and compared among all maxillary anterior teeth.
CBCT images from 720 teeth (120 patient) were evaluated, revealing an overall probability of IIP in the esthetic zone is 76.11% (548/720). Different implant restoration type was evaluated in this study, with the following results; straight screw-retained prosthesis at 3.47% (19/548), cement-retained prosthesis at 14.59% (80/548) and angle screw-retained prosthesis at 85.40% (468/548).
IIP with traditional straight screw-retained prosthesis demonstrated the lowest probability. Nevertheless, the use of angulated screw channels enhances the probability of achieving straight screw-retained prostheses.
The angulated screw channel is essential for increasing the probability of screw-retained prosthesis in IIP in the esthetic zone. However, limitation in screw angle correction still necessitate the use of cement-retained prostheses for numbers of patients undergoing IIP.
即刻种植（IIP）在美学区域的需求迅速增加。尽管这种治疗方法有很多好处，但矢状根位置通常决定了种植体的角度，通常需要使用粘结固位修复体。本研究调查了在美学区域中，成角种植体通道对 IIP 的影响。
本锥形束计算机断层扫描（CBCT）研究的目的是使用四种不同的种植体角度来确定在美学区域中进行 IIP 的概率。
对 2021 年 6 月 9 日进行的 CBCT 图像进行回顾性研究和评估。将上颌前牙的正中矢状图像输入种植体规划软件（Implant Studio®）。选择 Bone Level X Straumann® 种植体（BLX 3.5、3.75、4.0、4.5、5.0mm）和 Bone Level Tapered 种植体（BLT 2.9、3.3mm）进行美学区域 IIP 的三维种植体规划。记录并比较了所有上颌前牙的 IIP 频率分布和概率。
评估了 720 颗牙齿（120 名患者）的 CBCT 图像，结果显示美学区域 IIP 的总体概率为 76.11%（548/720）。本研究评估了不同的种植体修复类型，结果如下：直螺丝固位修复体为 3.47%（19/548），粘结固位修复体为 14.59%（80/548），角螺丝固位修复体为 85.40%（468/548）。
传统直螺丝固位修复体的 IIP 概率最低。然而，使用成角螺丝通道可以提高直螺丝固位修复体的概率。
成角螺丝通道对于提高美学区域 IIP 中螺丝固位修复体的概率至关重要。然而，对于许多接受 IIP 的患者，螺丝角度校正的限制仍需要使用粘结固位修复体。
