The Brånemark Clinic, Public Dental Health Service, Västra Götaland, Sweden.
Clin Implant Dent Relat Res. 2019 Apr;21(2):226-231. doi: 10.1111/cid.12709. Epub 2019 Feb 19.
A new implant design was launched in 2015 with internal connection allowing for placement of abutments with angulated screw channels. Such devices may eliminate the use of nonauthentic components, which may present with poor fit and jeopardize the construction. It may also eliminate the use of cemented single-crowns with the risk for excessive cement to cause marginal bone destruction.
To evaluate the outcome of a straight-walled implant with conical connection (NobelParallel CC), when used in the single-tooth situation of the anterior maxilla. Further, to elucidate the need for an abutment with angulated screw channel (ASC).
Patients referred for both implant surgery and prosthetics to rehabilitate missing single maxillary incisors/canines. Implants were placed according to a two-staged surgical procedure. Patients were followed up to delivery of prosthetic crowns with the purpose to extend the study up to 1-, 3-, and 5-year follow up. Registrations of implant survival, marginal bone level measurements, hard/soft tissue complications, and the incidence of ASC to avoid the use of nonauthentic components or crown cementation, were performed at the end of the study.
A total of 47 patients were included in the current investigation. One patient deceased during the study period. In all 51 implants were inserted, of which 14 implant sites were bone augmented either prior to implant placement or in connection with the insertion procedure. Further, four remaining teeth were extracted in the region of interest during implant placement. One implant presented with infection and mobility at abutment connection and was consequently removed. Implant survival rate was 98.0%. Mean marginal bone level at crown placement was 0.41 mm (SD = 0.45 mm) and the corresponding measurements at 1 year for 22 implants revealed a marginal bone resorption of 0.41 mm (SD = 0.36 mm). Abutments with angulated screw channels were used in 42/49 sites.
The NobelParallel CC implant seemed to work well together with the ASC abutment. No major complications were noted.
2015 年推出了一种新型植入物设计，具有内部连接，可放置带有成角螺丝通道的基台。此类器械可消除使用不合适配件的可能性，因为不合适配件可能会出现配合不良的情况，并危及修复体的结构。它还可消除使用粘固的单冠的可能性，因为粘固剂过多可能导致边缘骨破坏。
评估直壁锥形连接种植体（NobelParallel CC）在前上颌单牙缺失情况下的应用效果。此外，还阐明了使用带成角螺丝通道（ASC）基台的必要性。
将因缺失上颌单颗切牙/尖牙而接受种植体手术和修复的患者纳入研究。按照两期手术程序放置种植体。对患者进行随访，直至修复体牙冠交付，目的是将研究延长至 1、3 和 5 年的随访期。在研究结束时，对种植体存活率、边缘骨水平测量、软硬组织并发症以及 ASC 的发生率（以避免使用非原装部件或牙冠粘固）进行记录。
本研究共纳入 47 例患者。研究期间有 1 例患者死亡。共植入 51 颗种植体，其中 14 个种植体部位在植入前或植入过程中进行了骨增量。此外，在植入过程中还在感兴趣区域内拔除了四颗剩余的牙齿。有 1 颗种植体因基台连接感染和松动而被取出。种植体存活率为 98.0%。牙冠放置时的平均边缘骨水平为 0.41mm（SD=0.45mm），22 颗种植体 1 年时的相应测量值显示边缘骨吸收 0.41mm（SD=0.36mm）。在 49 个部位中有 42 个使用了带 ASC 的基台。
NobelParallel CC 种植体与 ASC 基台配合良好。未发现重大并发症。
