Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Cairo University, Cairo, Egypt.
Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Modern Sciences and Arts University (MSA), 6th of October, Egypt.
Oral Maxillofac Surg. 2022 Jun;26(2):299-309. doi: 10.1007/s10006-021-00984-6. Epub 2021 Jul 30.
This study aims to prospect the soft and hard tissue changes after augmentation of two different local mandibular contour defects using polyetheretherketone (PEEK) patient-specific onlay implants.
Six patients with disfiguring local mandibular deformities were included in this study (five males and one female) and received seven PEEK patient-specific implants (PSI), virtually designed and surgically settled to augment seven mandibular defects, three deficient chins, and four mandibular angels. The analysis of the soft and hard tissue changes utilized the superimposition of the preoperative and the 6-month postoperative sagittal and coronal CT views, after standardizing the radiographic interpretation.
The soft tissue gain for the chin was 6.8 mm ± 0.98 with a 45.8% increase versus 4.42 mm ± 0.41 with a 22.9% increase for the angle. The difference in the soft tissue gain between the two groups was statistically significant (P = 0.0001). Comparing the soft tissue gain to the planned implant thickness, the percentage of the soft tissue gain for the chin recorded 109.2% versus 65.57% for the angle. The difference between the two groups was also statistically significant (P < 0.0001).
PEEK patient-specific onlay implants represented an efficient and straightforward modality to augment local mandibular contour deformities with favorable esthetic outcomes; the total soft tissue profile gain of the chin region markedly exceeded that of the mandibular angle.
本研究旨在前瞻性研究使用聚醚醚酮（PEEK）患者特异性覆盖植入物修复两种不同下颌局部轮廓缺损后的软组织和硬组织变化。
本研究纳入了 6 名有面部畸形的下颌局部畸形患者（5 名男性和 1 名女性），共接受了 7 个 PEEK 患者特异性植入物（PSI），这些植入物经虚拟设计并通过手术修复了 7 个下颌缺损、3 个下颌缺陷和 4 个下颌角。通过对术前和术后 6 个月的矢状面和冠状面 CT 图像进行叠加，并在标准化影像学解释后，分析软组织和硬组织的变化。
颏部软组织增加 6.8mm±0.98，增加 45.8%，而下颌角增加 4.42mm±0.41，增加 22.9%。两组间软组织增加量的差异有统计学意义（P=0.0001）。将软组织增加量与计划植入物厚度进行比较，颏部的软组织增加量百分比为 109.2%，而下颌角的软组织增加量百分比为 65.57%。两组间的差异也有统计学意义（P<0.0001）。
PEEK 患者特异性覆盖植入物是修复下颌局部轮廓畸形的一种有效、直接的方法，可获得良好的美学效果；颏部区域的总软组织轮廓增加量明显超过下颌角。
