Unattractive teeth are generally referred to as misaligned teeth, and the common methods for orthodontic treatment include the traditional straight arch orthodontic technology and invisible orthodontic technology. 1. Straight arch orthodontic technology: mainly utilizes the thickness of the brackets, the deformation of wires, springs, etc. to generate force, thus guiding the teeth to move to the expected position to achieve the standard of individual normal fit. It is mainly divided into three stages: aligning the teeth and leveling the dental arch; closing the extraction gap and correcting the overlay and molar relationship; and fine-tuning the tooth position and occlusal relationship. Finally, maintenance is carried out. 2. Invisible Orthodontic Technology: Replacing traditional orthodontic devices with safe elastic and transparent polymer materials. Utilizing computerized three-dimensional reconstruction technology, the preoperative and postoperative result charts of the teeth are cut and divided into steps ranging from 3 to 70, and then different transparent orthodontic appliances are worn at each stage, which generate a gentle and long-lasting force to move the teeth slowly. Both methods have their own advantages and disadvantages, it is recommended to go to a regular hospital dentistry consultation, communication and choose the appropriate treatment plan.