Amet E M
Reconstructive & Implant Dental Center, Overland Park, KS 66214, USA.
J Oral Implantol. 1998;24(3):152-8. doi: 10.1563/1548-1336(1998)024<0152:CTWCMF>2.3.CO;2.
Loss of bone in the mandible after tooth removal is associated with anatomic and aesthetic complications and instability of the mandibular complete denture. This continuing bone loss is not limited to alveolar bone; portions of the basal bone may also be resorbed. Thus, mandibular complete denture is the most unstable, unretentive, conventional prosthesis fabricated in routine dental practice. Root-form endosteal implants cannot always be placed in advanced atrophic mandibles without autogenous bone grafting (from either the iliac hip crest or another site) or bone regeneration. The ramus frame implant (RFI) is indicated when the atrophy in the mandible is advanced. An RFI is an immediate, totally implant-supported prosthesis, which can use homologous grafting material and platelet-rich plasma for increased bone regeneration. The third-generation RFI provides all of the benefits of the first- and second-generation RFIs as well as improvements provided by computed tomography and computer-aided design/stereolithography applications: planning, simplified placement, improved grafting, predictable manufactured components, and retrievability.
拔牙后下颌骨骨质流失与解剖学和美学并发症以及下颌全口义齿的稳定性有关。这种持续的骨质流失不仅限于牙槽骨；基骨的部分也可能被吸收。因此，下颌全口义齿是常规牙科实践中制作的最不稳定、固位性最差的传统修复体。在没有自体骨移植（取自髂嵴或其他部位）或骨再生的情况下，根形骨内种植体并不总是能够植入严重萎缩的下颌骨。当下颌骨萎缩严重时，可使用升支支架种植体（RFI）。RFI是一种即刻的、完全由种植体支持的修复体，它可以使用同种异体移植材料和富血小板血浆来促进骨再生。第三代RFI具备第一代和第二代RFI的所有优点，以及计算机断层扫描和计算机辅助设计/立体光刻应用带来的改进：规划、简化植入、改良移植、可预测的制造组件以及可取出性。
