Essentials of the Technical Guide for Invisible Orthodontic Treatment without Bracket in Youli "Dry Goods"
The data of the fourth national oral health sampling survey showed that the detection rate of deformed teeth was as high as 9 1.5%.
According to the consulting report, the retail sales of orthodontic market in China increased from $3.4 billion in 20 15 to $7.3 billion in 20 19, with a compound growth rate of 20.7%. It is estimated that it will reach $29.6 billion in 2030, with a compound annual growth rate of 13.6%.
Behind this is the enhancement of people's awareness of consumption, oral health and oral beauty. In this case, the demand for dental care will continue to increase. If the oral track is a crown in the capital market (see the transaction price | detailed explanation of the model), then orthodontics must be regarded as one of the brightest pearls.
These problems are not only a threat to oral health.
The impact on appearance and mental health is also considerable)
Orthodontics can adjust patients' facial image, improve chewing function, make facial appearance more beautiful and oral health more healthy. Orthodontics refers to the continuous application of gentle external force in a specific direction to teeth through orthodontic devices to adjust the coordination among facial bones, teeth and maxillofacial neuromusculars, so as to achieve the goal of balanced, stable and beautiful oral and maxillofacial system. The treatment of malocclusion mainly includes dentition crowding, dentition space, protrusion and dentition deformity. Orthodontics is of great benefit to improve the quality of life of patients with malocclusion and has strong consumption.
With the gradual improvement of patients' requirements for aesthetics and comfort of orthodontic treatment, orthodontic technology has developed rapidly, and bracket-free invisible orthodontic technology came into being. It is comfortable, transparent, beautiful and efficient, which changes the traditional orthodontic method. Steel wire and iron teeth? Orthodontic phenomenon is widely favored by orthodontic patients, which makes people no longer have rejection psychology to orthodontics.
Invisible orthodontics was first introduced in the United States at 1998. Compared with traditional fixed orthodontics, invisible orthodontics made of safe and transparent elastic polymer materials does not need brackets and steel wires, which greatly simplifies the clinical operation, saves time and labor in the orthodontic process, and can complete the whole treatment process without being noticed by others, without affecting daily life and social interaction. Invisible orthodontics is a high-tech in the oral field, which breaks the limitations of traditional orthodontics and has outstanding advantages. It has been used in orthodontics for more than 20 years. It opens a new direction of digital and accurate orthodontic treatment, which provides a brand-new treatment method for orthodontic patients, which is different from the traditional fixed orthodontic technology.
In 2004, Chinese scholars developed a bracketless invisible orthodontic diagnosis and treatment system with independent intellectual property rights in China, which opened the research and clinical application of this technology in the field of stomatology in China and played a positive role in promoting its subsequent application and development in China.
With the more and more extensive application of bracket-free invisible orthodontic technology at home and abroad, there are more and more product brands, and the number of completed cases has increased rapidly. However, there is still a lack of unified standards in the selection of indications, clinical diagnosis and treatment procedures, and evaluation and analysis of curative effect. The Orthodontic Professional Committee of Chinese Stomatological Association formed an expert group, and combined with the clinical experience and extensive opinions of domestic orthodontists, compiled the Technical Guide for Orthodontic Invisible Treatment without Bracket, which established standards from the aspects of indication selection, clinical diagnosis and treatment process, curative effect evaluation and analysis, and provided reference for the majority of orthodontists to carry out invisible treatment without Bracket.
Part 1
What are the risks in the application of invisible orthodontic technology without brackets?
Like traditional fixed orthodontics, there are various orthodontic complications in bracket-free invisible orthodontics, and the most likely derailment is caused by the following three reasons:
1, the influence of the material performance difference of invisible appliance
2. The influence of patients' individual differences.
3. Tooth movement during invisible orthodontics is different from computer preset.
Suggestions to reduce risks:
a)？ Bracket-free invisible appliance is a removable appliance, and the treatment process depends on the cooperation of patients. Good compliance is the premise of ensuring good therapeutic effect of invisible appliance.
b)？ For some complicated tooth movements, it may be necessary to restart the treatment, or use auxiliary devices such as fixed appliances during the treatment to achieve good treatment results.
c)？ It must be a professionally trained and qualified orthodontist and a qualified manufacturer.
the second part
Indications and selection of invisible orthodontic technique without brackets?
The Guide classifies foreseeable cases into three categories: high, medium and low, and puts forward corresponding requirements for doctors' professional level.
1, a highly predictable case, refers to a case that can accurately achieve the purpose of analog error correction.
a)？ Cases in which the clinical crown is high enough to ensure the good retention of the appliance; ?
b)？ Irregular number of teeth and bones? 4mm and 2-4mm labial and buccal arch expansion can be used to relieve mild crowding; ?
c)？ Class ⅰ tooth extraction cases with irregular tooth quantity and bone mass > 8mm and serious crowding;
d)？ close
e)？ Correction of extraction of lower incisors;
F) dental diseases
G) I -II depth coverage
2. Moderately predictable cases need to be treated by doctors who have some experience in invisible orthodontics without brackets in order to accurately achieve the goal of simulated orthodontics.
A) secondary depth coverage
B) Cases with posterior teeth less than 4mm after distal movement; ?
C) Intermaxillary traction therapy is needed;
d)？ Is my tooth loose? And above cases;
E) the front teeth are slightly open.
F) moderate anterior teeth opening
3. Cases with low predictability need to be treated by doctors with rich experience in invisible correction and fixed correction in order to accurately achieve the goal of simulated correction.
a)？ Severe torsion of premolars and mandibular canines in 2 cases;
b)？ Deep coverage of bimaxillary protrusion requiring extraction and adduction
c)？ In the case of premolar extraction, the posterior teeth need to move forward more than 2mm; ?
d)？ Cases of clinical crown eruption with insufficient height; ?
e)？ Cases requiring orthodontic and orthognathic treatment. ?
The guideline holds that with the development of materials science and technology, the types of cases that can be treated by bracket-free invisible orthodontic technology will gradually expand. However, due to many reasons, such as the failure to use the information of the resistance center of individual teeth and the different alveolar bone remodeling rates of different individuals, the choice of indications should not only be wrong, but also strongly oppose beginners to treat low-predictable cases without bracket invisible orthodontic technology.
the third part
What are the requirements for case data collection of bracket-free invisible orthodontic technology?
It is mainly obtained through the following three aspects.
1, conventional acquisition surface
2. Collection of image data?
a)？ Curved section: it is used to comprehensively observe the number of teeth and the development of tooth germs, and also to evaluate the inclination of dental axis, the presence or absence of the third molar, and the symmetry of bilateral condyles and jaws.
b)？ Lateral cephalogram: used to identify teeth,
c)？ CBCT: If necessary, the patient's temporomandibular joint and the basal bone of upper and lower anterior teeth can be comprehensively evaluated.
3. Get a digital model?
a)？ Preparation of silicone rubber impression?
b)？ Digital intraoral scanner to obtain dentition information?
The detailed information of dentition and gingiva can be obtained by using silicone rubber impression or digital intraoral scanner, and a digital model can be established for model analysis, treatment plan formulation and treatment result prediction. ?
part four
What is the design process of invisible orthodontic treatment without brackets?
The design process mainly includes the following six aspects.
1. Design a series of tooth movement through digital simulation, including the judgment of whether the final target position of tooth movement is appropriate and the rationality of step-by-step movement during tooth movement.