The influence of elastic modulus on silicone resin in medical applications is mainly reflected in the following aspects:
Compatibility with human tissues
Simulating Soft Tissue Characteristics: Many soft tissues in the human body, such as blood vessels, bladder, skin, etc., have a specific range of elastic moduli. If silicone resin is used to manufacture medical products that replace soft tissues such as artificial blood vessels and artificial bladder, a suitable elastic modulus can better simulate the elasticity and flexibility of natural tissues. For example, the elastic modulus of artificial blood vessels is close to that of natural blood vessels, which can produce corresponding elastic deformation with the heartbeat during blood flow. It will not be too hard to obstruct blood flow or too soft to withstand blood pressure, which helps maintain normal blood circulation, improve physiological compatibility and use effect after implantation.
Reduce damage to surrounding tissues: During the process of implantation in the human body, such as artificial joint pads, if the elastic modulus of silicone resin is adapted to the surrounding bone, muscle and other tissues, it can coordinate with the surrounding tissues to deform during human movement, avoiding mechanical damage such as excessive compression and friction caused by high elastic modulus (too hard), and also preventing insufficient support function due to low elastic modulus (too soft), which affects the stability and normal use of artificial joints.
In terms of functional stability
Ensure long-term effectiveness: For some silicone medical products that are implanted in the body for a long time, such as heart valves, an appropriate elastic modulus helps to maintain the stability of their structure and function under external forces such as pressure and friction generated by human physiological activities over a long period of time. If the elastic modulus is inappropriate, such as too low, it may undergo excessive deformation or even damage under long-term blood flow impact, affecting the normal opening and closing function of the heart valve and endangering the patient's life; If the elastic modulus is too high, it may lead to a decrease in flexibility and also fail to simulate the function of natural heart valves well, affecting blood circulation efficiency.
Maintaining the performance of medical devices: Medical devices such as medical catheters that require passage and retention within the body can maintain shape stability during insertion, retention, and subsequent use with appropriate elastic modulus. This not only facilitates insertion but also maintains its patency in complex environments within the body. Improper elastic modulus will not cause bending, blockage, or other issues that may affect normal functions such as fluid delivery and drug administration.
Wound healing and care
Application of wound dressings: When used as wound dressings, the elastic modulus of silicone resin affects its adhesion to the wound and its protective effect on the wound. Silicone dressings with moderate elastic modulus can better fit the contour of the wound, providing certain support and protection to prevent physical damage from the outside world, without compressing newly formed fragile tissues due to hardness, which is conducive to creating a good wound healing environment and promoting the growth of cells and tissue repair at the wound site.
Burn care function: For burn dressings, an appropriate elastic modulus allows them to adapt to changes in the shape of the burn site, especially in active areas such as joints, which can deform appropriately with human movement, avoiding the dressing from shifting or being damaged due to movement. It continuously and effectively provides moisturizing, insulation, and infection prevention functions for the burn wound, ensuring smooth healing of the burn wound.
Wear comfort
Medical gloves and other wearable devices: In medical products such as medical gloves and oxygen masks that need to be worn, the elastic modulus of silicone resin determines their comfort level. When the elastic modulus is appropriate, the gloves can fit the hands without hindering the flexibility of hand operation, and the oxygen mask can tightly fit the face without causing obvious pressure to the user, improving the user experience of medical staff and patients, while ensuring that these products can perform their protective, oxygen delivery and other functions normally.

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