Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Arnold-Heller-Str. 16, 24105, Kiel, Germany.
Department of Prosthodontics and Biomaterials, Medical Faculty, RWTH Aachen University, Aachen, Germany.
J Dent. 2019 Mar;82:63-65. doi: 10.1016/j.jdent.2019.01.006. Epub 2019 Jan 25.
The aim of this prospective pilot study was to evaluate the concept of one single implant placed in the edentulous mandible to retain a complete denture with regard to implant survival and prosthodontic maintenance over an observation period of 10 years.
Eleven edentulous patients were included and received one implant in the midline of the mandible. Five implants healed submerge and were uncovered 2 months later. The other six healed un-submerged and were provided with a healing abutment 4 mm in height thus moderately loaded. All denture bases were temporarily relined during the healing period and two months later provided with a ball attachment for implant retention. Implant related parameters and prosthodontic maintenance interventions were assessed four weeks after implant loading and then annually.
Over a mean observation period of 108.9 months (35-136 months), no implant was lost. The most frequent prosthetic maintenance intervention was activation of the matrix due to loss of retention, followed by exchange of the female part. Fracture of the denture base in the attachment area was a frequent complication and occurred in 8 cases. Two denture bases fractured twice.
Within the limitations of this prospective pilot study, the concept of a single midline implant to retain a mandibular complete denture is promising over ten years for edentulous patients. Regular recall visits should be scheduled due to frequent maintenance interventions. Further research on this topic with a larger study cohort is needed.
本前瞻性初步研究的目的是评估在 10 年观察期内，将单个种植体植入无牙下颌以保留全口义齿的概念，主要评估种植体存活率和修复体维护情况。
共纳入 11 名无牙患者，在下颌中线植入一颗种植体。其中 5 颗种植体愈合后被埋入并在 2 个月后暴露，另外 6 颗则未被埋入，通过 4mm 高的愈合基台轻度负重。所有义齿基托在愈合期内暂时衬里，两个月后通过球附体固定。在种植体负载后 4 周及之后每年评估种植体相关参数和修复体维护干预情况。
在平均 108.9 个月（35-136 个月）的观察期内，无种植体丢失。最常见的修复体维护干预是由于丧失固位力而激活基托，其次是更换母件。附着区义齿基托断裂是一种常见并发症，8 例发生。有 2 个义齿基托断裂 2 次。
在本前瞻性初步研究的限制范围内，对于无牙患者，单个中线种植体保留下颌全口义齿的概念在十年内是有前途的。由于需要频繁进行维护干预，应定期进行随访。需要进一步进行更大样本量的研究来探讨该主题。
