A 32-year-old man is brought to the emergency department following an alleged assault with a knife. On examination, there is a single wound over the left anterior chest wall measuring 2.5 cm in length with clean, sharp margins and minimal surrounding tissue damage. The wound edges are in perfect apposition and there is no tissue bridging across the defect. The patient is haemodynamically stable. What is the most likely type of wound, and what does the absence of tissue bridging indicate?