Which statement is true regarding lasers and electrosurgery units?

The statement regarding lasers ablation affecting fewer cell layers and resulting in less collateral damage is accurate due to the focused energy that lasers produce. Lasers operate by delivering concentrated light energy, which can target specific tissues, allowing for precise cutting or tissue sculpting while minimizing the surrounding tissue's exposure to heat. This precision helps in reducing the likelihood of collateral damage, which is particularly beneficial in delicate surgical procedures where preserving surrounding healthy tissue is crucial.

In contrast, electrosurgery units primarily utilize electrical currents to cut or coagulate tissue. Although effective in many surgical contexts, they can lead to more extensive thermal spread beyond the immediate surgical site, potentially damaging adjacent cells. This distinction is fundamental in deciding which modality to use in various surgical scenarios, especially when minimizing trauma to surrounding areas is essential.