Bronze sculptures with thin protruding elements, such as delicate limbs, wings, or intricate details, are particularly vulnerable to structural issues due to their fragility and exposure to environmental factors. The most common problems include:

1. Cracking and Fractures: Thin sections are prone to stress cracks, especially at joints or where the metal is unevenly cooled during casting. Over time, vibrations or physical impacts can worsen these flaws.

2. Bending or Warping: Protruding elements may bend under their own weight or due to improper handling. Temperature fluctuations can also cause expansion and contraction, leading to deformation.

3. Corrosion and Pitting: Bronze reacts with moisture and pollutants, forming patina or greenish corrosion. Thin areas corrode faster, weakening the structure and causing pits or holes.

4. Metal Fatigue: Repeated stress, such as wind or movement, can cause microscopic cracks in thin sections, eventually leading to breaks.

5. Poor Casting Defects: Air bubbles or incomplete pours during the original casting process can create weak spots that fail over time.

To mitigate these issues, regular inspection, proper mounting, and controlled environmental conditions are essential. Professional restoration techniques, such as welding, reinforcement, or corrosion inhibitors, can extend the sculpture's lifespan. Understanding these challenges helps collectors and conservators preserve bronze artworks for future generations.