Fixation system for bone implants and subperiosteal implants using PEEK screws for pressure relief
The PEEK screw-based fixation system addresses bone resorption and removal challenges by providing a pressure-absorbing alloplastic implant, ensuring secure fixation and easy implant removal.
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-04-09
AI Technical Summary
Existing fixation screws in bone augmentation and subperiosteal implantation transmit mechanical forces directly, leading to bone resorption and complications during osseointegration, and are difficult to remove without damaging the bone.
A fixation system using a PEEK screw to secure an alloplastic bone implant that acts as a pressure-absorbing barrier, allowing for secure fixation and easy removal without damaging the bone.
The system effectively prevents bone resorption by absorbing mechanical pressure and facilitates easy removal of the implant without damaging the bone.
Smart Images
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Abstract
Description
1. Technical field
[0001] The invention relates to a fixation system for bone regeneration. It comprises devices for fixing alloplastic bone implants (shields) and optionally subperiosteal implants (SPI) to prevent bone loss due to soft tissue pressure. 2. State of the art and problem statement
[0002] In bone augmentation (bone grafting) and subperiosteal implantation, the problem arises that the sutured soft tissue (periosteum / gingiva) exerts mechanical pressure on the graft or the implant framework. This pressure frequently leads to bone resorption and complications during osseointegration. Existing fixation screws are often rigid and transmit forces directly, or they are difficult to remove without damaging the newly formed bone. 3. Solution and advantages
[0003] The invention solves this problem with a system in which an alloplastic bone implant (shield) acts as a pressure-absorbing barrier. This shield is fixed with a specialized PEEK screw.
[0004] The system is modular and offers two main applications: • Variant 1 (SPI): The shield protects an underlying subperiosteal implant. • Variant 2 (shell technique): The shield protects direct bone replacement material in preparation for later endosseous implantation.
[0005] The use of PEEK (polyetheretherketone) for the fixation screw allows for secure fixation, yet due to the material properties, it can be easily removed (drilled out) without damaging the threads in the SPI or bone. Furthermore, the PEEK material prevents cold welding. 4. Character description
[0006] The invention is explained in more detail with reference to the attached drawings: • Fig. Figure 1 shows details (8) of the osteosynthesis screw (4) with the integrated PEEK inlay (9). • Fig. Figure 2 shows the specialized PEEK screw (3) in detail. • Fig. Figure 3 shows the components in the context of the jaw, in particular the subperiosteal implant (5) on the autologous bone (6), covered by the alloplastic bone implant (2) and the soft tissue (1). • Fig. Figure 4 shows the alloplastic bone implant / shield (2) in the application of the shell technique to cover augmentation material (7). E. List of reference symbols 1 Soft tissue / periosteum 2 Shield / alloplastic bone plate 3 PEEK screws 4 Osteosynthesis screws with double thread (8) and PEEK inlay (9) 5 SPI (Subperiosteal implant) 6 bones / own bones 7 Augmentation 8 Thread section / Double thread 9 PEEK Inlay