Department of Removable Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
J Oral Rehabil. 2011 Nov;38(11):827-34. doi: 10.1111/j.1365-2842.2011.02213.x. Epub 2011 Mar 24.
This article aimed to examine the clinical and radiographic outcome of mini dental implants (MDIs) supporting a mandibular overdenture. Twenty-eight patients (16 men and 12 women) complaining from insufficient retention of their mandibular denture received a total of 112 MDIs (four per patient) in the interforaminal area of the mandible using the non-submerged flapless surgical approach. Implants were immediately loaded with mandibular overdentures after implant insertion. Each implant was evaluated at the time of initial prosthetic loading, 6, 12, 24 and 36 months thereafter. Clinical evaluation was performed using plaque index (PI), gingival index (GI), probing depth (PD) and periotest values (PTVs). Radiographic evaluation was performed in terms of vertical (VBLO) and horizontal (HBLO) alveolar bone loss. Cumulative success and survival rates were calculated using life table analysis. Plaque index, GI, PD, VBLO and HBLO increased significantly in the first year after overdenture insertion, and no significant difference between subsequent observations was noted. Periotest values demonstrated no significant difference between observation times. The cumulative survival and success rates of MDIs were 96·4% and 92·9%, respectively. Within the limitations of this study, clinical and radiographic peri-implant tissue responses of immediately loaded MDIs supporting a mandibular overdenture were favourable after 3 years. However, randomised, controlled clinical trials are needed to compare these responses to that of conventional-diameter implants.
本文旨在探讨微型牙种植体（MDIs）支持下颌覆盖义齿的临床和影像学效果。28 名（16 名男性和 12 名女性）抱怨下颌义齿固位不足的患者采用非潜入式无瓣手术方法，在下颌骨的正中联合区域共植入 112 枚 MDIs（每个患者 4 枚）。植入物植入后立即用下颌覆盖义齿加载。在初始修复加载时、之后的 6、12、24 和 36 个月评估每个种植体。临床评估采用菌斑指数（PI）、牙龈指数（GI）、探诊深度（PD）和牙周探诊值（PTV）。影像学评估以垂直（VBLO）和水平（HBLO）牙槽骨丧失为标准。采用寿命表分析计算累积成功率和存活率。戴入覆盖义齿后第一年，PI、GI、PD、VBLO 和 HBLO 显著增加，随后各观察时间点之间无显著差异。牙周探诊值在观察时间点之间无显著差异。MDIs 的累积存活率和成功率分别为 96.4%和 92.9%。在本研究的限制范围内，3 年后，即刻加载的 MDIs 支持下颌覆盖义齿的种植体周围组织的临床和影像学反应良好。然而，需要进行随机对照临床试验来比较这些反应与传统直径种植体的反应。
