## 4 Discussion  
The multifunctional simple machine demonstrates a novel capacity to anchor into both biological and synthetic substrates without exerting harmful lateral stresses, a critical feature supported by the observed disparity between insertion and removal torque values (MIT < MRT). The collection and compaction of substrate material during insertion--combined with the cohesive surface bonding termed frictional cohesive force (FCF)--enable a mechanically stable and biologically gentle interlock [21]. From a biomedical perspective, this innovation provides substantial benefits over conventional bone screws. Unlike traditional implants that rely on lateral compression--risking thermal osteonecrosis or microfractures--the new device utilizes frictional bonding and internal material compaction to ensure secure fixation while preserving biological tissue viability. In orthopedic and dental applications, particularly within osteoporotic bone, this mechanism fosters improved osseointegration and primary stability. These advantages are demonstrated by experimental findings in which MRT consistently exceeded MIT across all densities of synthetic bone tested [29]. The difference in torque values serves as a quantifiable biomechanical parameter that may improve clinical planning and implant predictability. In civil engineering, the same mechanism proves advantageous in anchoring within heterogeneous soils and fractured rock. By avoiding the creation of destabilizing stress fields, the machine offers potential for stable anchoring in applications such as rock bolting, foundation reinforcement, and soil stabilization [2; 10; 11]. Comparatively, conventional anchoring methods may generate radial cracks or require grouting, which are processes that are avoided with this cohesive system. In aerospace settings, the machine's ability to maintain mechanical integrity under vibration-prone conditions suggests applications in satellite assembly and modular repairs [17; 18; 19]. Conventional fastening methods often suffer loosening in dynamic environments, but the friction-based cohesive locking of the new design counters such risks without inducing structural fatigue. Energy sector benefits include anchoring pipelines in seabels or fractured geologies and securing wind turbines that are subjected to fluctuating loads. These applications lever \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**PCF 10** & **Density** & **MIT (N/cm)** & **MRT (N/cm)** & **μsf** \\
**Sample** & **(g/cm\({}^{3}\))** & **MIT (N/cm)** & **MRT (N/cm)** & **μsf** \\ \hline
1 & 0.16 & 20 & 21 & 1.05 \\
2 & 0.16 & 21 & 22 & 1.05 \\
3 & 0.16 & 20 & 21 & 1.05 \\
4 & 0.16 & 20 & 21 & 1.05 \\
5 & 0.16 & 20 & 21 & 1.05 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Measurement of MIT and MRT on PCF 10 (osteoporotic bone). age the device's ability to adapt to variable-density materials, enabling secure, minimally invasive anchorage [12; 20]. The mechanism underlying these advantages, FCF, is supported by analogs such as cold welding observed during controlled drilling. In the BKS model, frictional cohesion is achieved without lateral pressure, using approximately 30% of the implant volume to incorporate compacted host material, which then contributes to enhanced retention during removal (MRT > MIT) [29; 30; 31]. These findings establish a direct link between mechanical data and clinical or industrial performance. Comparative analysis with augmentation methods such as polymethylmethacrylate (PMMA) cementation reveals several distinctions. While cement-augmented screws enhance pullout resistance, they are associated with complications such as thermal necrosis, implant migration, and revision difficulties [36; 37; 38; 39; 40; 41; 42; 43]. In contrast, the BKS achieves similar or superior fixation without introducing foreign material, enabling autogenous integration, simplified revision, and reduced complication risk. Additional studies on orthopedic fracture models confirm that screw augmentation tailored to bone quality enhances primary stability.