Complex sentence: Instead of using the traditional method where metal or clear braces were mounted for long periods of time, each set of aligners is worn for about 2 weeks, and they are removed to eat, drink, brush and floss.
Split into simpler sentences: Instead of using the traditional method where metal or clear braces were mounted for long periods of time. Each set of aligners is worn for about 2 weeks, and they are removed to eat, drink, brush and floss.