上顎骨擴張（palatal expansion）是一種常見配合箍牙的治療方式，尤其適用於上顎過窄、牙齒擠擁、咬合不正或有呼吸問題的情況。對於計劃矯齒的人來說，關鍵問題不是「流唔流行」，而是「究竟我需唔需要做？」、「做咗實際有咩幫助？」。

when toothache occurs, many people immediately assume it's just "heatiness" or brushing too hard. However, this is often an early sign of gingivitis or periodontal disease. When the gums are chronically inflamed and plaque builds up, the supporting tissues around the teeth are gradually affected. If the condition continues to worsen, it can lead to recurring bleeding gums, toothache, bad breath, widening gaps between teeth, and even loose teeth. Periodontal disease doesn't develop overnight; it's the result of prolonged poor oral hygiene. Therefore, if bleeding gums and toothache occur simultaneously, it shouldn't be ignored.