## 6 Conclusions and Outlook  
With the unceasing advancement of medical and electronic technologies, wireless implantable devices have evolved from theoretical concepts to practical realizations and are extensively employed in the medical domain for the monitoring of diverse physiological signals. In comparison to traditional medical devices, implantable devices possess advantages in terms of high temporal continuity and comfort during the monitoring process. The proliferation of various sensing technologies, the research breakthroughs in biodegradable materials, and the innovative designs of unique device structures have significantly propelled the robust development of this field.  
This article concurrently presents the current developmental status of sensing, wireless communication, and biodegradable materials, which serve as crucial components of biodegradable implantable systems. By conducting a comparison of biodegradable materials, the article delineates the applicable scope of these materials. Specifically, a particular material is suitable for a sensor operating on a specific principle and employing a certain communication method. Through the integration of these systems, readers are enabled to design a biodegradable implantable sensor tailored to a specific scenario in accordance with their own concepts. This sensor is also characterized by high measurement accuracy and excellent communication capabilities. It is important to note that this is not merely a matter of substituting the original materials with biodegradable alternatives.  
Nevertheless, numerous challenges remain to be tackled. For instance, the advancement of implantable batteries is of critical importance for prolonging the service life of devices. The design of high-performance implantable antennas has the potential to significantly enhance the range and speed of data transmission. Biodegradable silicon-based circuits also constitute a highly promising area of research. If implantable circuits can be fabricated from biodegradable materials and demonstrate performance comparable to that of traditional silicon-based solid circuits, not only will the device volume be substantially reduced, but its performance will also be notably improved. Moreover, enhancing the performance reliability of biodegradable devices is another key issue that must be surmounted. This necessitates in-depth cross-disciplinary collaboration, encompassing materials science, life science, and electronic science, to jointly drive the progress of this field. Simultaneously, it poses a significant challenge to painlessly and non-invasively implant sensors into specific locations within the human body for non-surgical patients.  
In the future, implantable sensors can be widely applied to patients and sub-healthy people to continuously measure multiple physiological parameters, provide early warnings for diseases, and reduce the risk of disease deterioration.  
**Author Contributions:** Conceptualization, Z.C. and L.P.; methodology, Z.C.; investigation, Y.Z., Q.X. and S.L.; resources, Z.C.; data curation, Z.C.; writing--original draft preparation, Z.C.; writing--review and editing, Z.C., Y.Z., Q.X. and S.L.; supervision, L.P.; project administration, L.P. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research received no external funding.  
**Conflicts of Interest:** The authors declare no conflict of interest.