Ancient poets described the beauty of a smile with phrases like "radiant jade teeth" and "crimson lips holding white jade." The classic poem "The Noble Lady" from the Book of Songs vividly portrays a beauty's teeth as "white as gourd seeds," capturing their pristine whiteness and perfect alignment.Today, possessing a beautiful smile no longer relies solely on "natural beauty." With advances in medical technology and the spread of health awareness, the ranks of those seeking orthodontic treatment continue to grow, spanning an increasingly wide age range.
In China, the prevalence of malocclusion during the permanent dentition stage (see Figure 1) is approximately 72%. This means that seven out of ten people have teeth that are not perfectly aligned or harmonious.However, orthodontic treatment is costly, time-consuming, and requires specialized expertise. Compounded by the constant emergence of various "new technologies" and "black technologies" flooding the market, many patients feel overwhelmed and confused. So, how should we rationally view the changes orthodontics brings to facial appearance?How can one determine the optimal timing for dental correction?
1. Health is the ultimate goal of orthodontics
Subject: Ms. Peng, homeroom teacher for 7th grade in Chongqing
A girl named Xiaojie in my class has recently faced teasing when her name is called during lessons, with some students even laughing out loud.I learned that because Xiao Jie's profile appears slightly concave, some students have given her a nickname. While disciplining those students, I also worry that Xiao Jie might become sensitive and insecure at this age. Nearly half of my class wears braces, and Xiao Jie's issue could likely be improved through orthodontic treatment. Yet her parents dismiss it, saying, "She's not going to be a celebrity, so why put her through that?"
While many believe "orthodontics is like cosmetic surgery" or "straightening teeth makes you beautiful," orthodontics primarily addresses health issues. Misaligned teeth not only affect appearance but also harm oral and overall health.
"Misaligned teeth are difficult to clean, increasing the risk of cavities and periodontal disease. They also impair normal oral function, such as reducing chewing efficiency and affecting speech.Patients with micrognathia often suffer from snoring due to narrowed airways. Severe cases may develop obstructive sleep apnea-hypopnea syndrome, potentially triggering systemic diseases like hypertension, coronary heart disease, diabetes, and cerebrovascular disorders," explained Cao Yang, Director of Orthodontics at the Stomatological Hospital of Sun Yat-sen University.
It's easy to imagine how misaligned teeth can undermine self-confidence, especially for adolescents like Xiao Jie.Cao Yang explained that orthodontic treatment can improve certain facial issues: First, protruding lips. There are various types of protruding lips. Those caused by teeth "poking out" can be corrected through tooth extraction and retraction of the front teeth. However, for buck teeth where the bones push the teeth forward, optimal results may require orthodontic treatment combined with orthognathic surgery in adulthood.Second, underbite. Correction can begin as early as the primary dentition stage. After permanent teeth erupt, treatments like maxillary protraction or functional appliances may be applied based on individual cases. Severe jaw deformities, especially those with a hereditary component, may require orthognathic surgery.Third is facial asymmetry. In reality, all human faces exhibit some degree of asymmetry. This asymmetry primarily originates from three sources: the jawbones, muscles, and teeth. Orthodontists select intervention methods based on the specific source.
Cao Yang specifically pointed out that currently, "pediatric facial management" has been heavily hyped, causing concern and even anxiety among many parents.However, inappropriate treatment interventions can only add unnecessary distress to children and may even lead to irreversible consequences. It is strongly recommended that parents seek consultation and treatment from doctors with formal orthodontic correction training and professional backgrounds. As a medical intervention, orthodontics prioritizes health as its primary goal. If patients expect orthodontics to achieve a "dramatic improvement in appearance" or even create a so-called "standard smile curve," they may end up disappointed."The vast majority of medical needs can be met through proper channels. I say 'vast majority' because during treatment, doctors cannot ignore a patient's dental fundamentals to arbitrarily achieve desired outcomes. As ethical, conscientious practitioners with professional boundaries, we have a responsibility to guide patients toward appropriate medical solutions," stated Chen Qi, Director of the Medical Aesthetics Quality Control Center in Chengdu's Xindu District.
2. How to Determine the Optimal Timing for Orthodontic Treatment
Narrator: Ms. Wang, mother of Weiwei, a first-grade elementary school student in Beijing
Not long ago, Weiwei knocked out a front tooth during play. I took him to a dental clinic. The dentist said that besides the injury, he also had cavities and mild underbite, requiring timely orthodontic correction.The dentist also mentioned that since his teeth haven't fully erupted yet, even if we correct it now, it might relapse later and require further treatment. My husband thinks Weiwei just mimics monsters baring their teeth and it's a harmless habit. I worry that not intervening might miss the optimal correction window, but which should we prioritize first—filling the cavity, waiting for permanent teeth to come in, or starting orthodontic treatment?
When exactly should we take our child for an orthodontic evaluation? Should we wait or act now? Many parents share this uncertainty. "There is no absolute 'golden window' for orthodontic treatment. Only by proactively managing oral health throughout life and seeking timely intervention based on individual bite conditions can one seize the optimal moment for correction,""The key to timing orthodontic treatment lies in the word 'appropriate,'" said Han Xianglong, Professor of Orthodontics and Chief Physician at West China School of Stomatology, Sichuan University.
Timely orthodontic intervention not only maximizes efficiency but also guides a child's growth and development, potentially improving facial structure.Han Xianglong summarized prominent malocclusions (see Figure 1) at various developmental stages, urging parents to pay close attention and seek timely medical advice.
During the deciduous dentition stage (ages 3 to 5), children often develop deciduous dentition retrognathism (see Figure 1)—commonly known as an "underbite"—due to improper feeding methods, bad habits, and genetic factors.Early intervention during this period can halt the progression of underbite (see Figure 1) and guide jawbone development through early treatment, preventing permanent underbite (see Figure 1). The case of Weiwei mimicking monster "teeth" exemplifies an oral habit that may induce primary tooth underbite (see Figure 1).
During the mixed dentition stage (ages 6 to 12), children experience a growth spurt. For those with functional or skeletal malocclusions (see Figure 1) such as a small jaw or underbite, this period offers an optimal window to leverage jawbone growth potential through functional orthodontic treatment. This approach can significantly improve facial aesthetics and function.Therefore, children during tooth replacement should undergo regular orthodontic evaluations to assess functional and skeletal imbalances.
By the permanent dentition stage (after age 12), most permanent teeth have erupted into position, and the development of the dental arches and jawbones is largely complete. Adolescents also demonstrate greater cooperation with treatment. Orthodontic intervention during this phase can leverage the vigorous bone metabolism typical of adolescence to efficiently correct various types of malocclusions (see Figure 1).
Many adults are eager to pursue orthodontic treatment yet harbor significant concerns, fearing they may have missed the optimal window for achieving ideal results. "Even if the earlier intervention periods mentioned have passed, there's no need for excessive worry. As long as overall health is good and the patient's periodontal, dental, and temporomandibular joint conditions are assessed by a doctor as suitable for orthodontic treatment, it can be performed across a wide age range,"" explains Han Xianglong.
Furthermore, for patients like Weiwei who require treatment for multiple oral conditions, Han Xianglong recommends first consulting an orthodontic specialist for an orthodontic evaluation. After gathering data and conducting an assessment, a systematic treatment plan can be developed to progressively address other oral health issues.Orthodontic treatment requires a foundation of good oral hygiene, with teeth cleaning and fillings typically completed before orthodontic work begins. For patients considering implants for missing teeth, it's advisable to consult both implant and orthodontic specialists to determine a multidisciplinary treatment plan. This involves assessing whether gaps from missing teeth can be closed through orthodontics or if orthodontic treatment should be done first to adjust spacing, thereby creating conditions for implant restoration.
3. Are "Orthodontic Aftereffects" Preventable and Reversible?
Subject: Zhao, a third-year university student from Wuhan
You wouldn't guess it, but I wore braces as a kid. Later, I didn't wear my retainer consistently enough, and my teeth gradually shifted back out of alignment.Maybe I didn't clean well enough during treatment—after the braces came off, I had several cavities, uneven tooth color, and some gum recession. The dentist said it wasn't his "workmanship."I spent the money, endured the pain, yet still cringe when I smile. Invisible aligners have become popular these past few years, and I considered trying again. But when I found out it would cost tens of thousands, I backed out.While some bloggers showcase enviable before-and-after transformations, countless "orthodontic horror stories" leave netizens stunned. The most common complaints revolve around "post-treatment complications" like "braces face," enamel damage, and "black triangles."To address these concerns, our reporter consulted Dr. Ni Mi, Associate Chief Physician at the Department of Stomatology, Nanjing First Hospital, about their causes and solutions. "Starting with 'braces face,' this is the most common orthodontic complication. It occurs because reduced chewing force during treatment leads to disuse atrophy of the masticatory muscles.The severity of 'braces face' varies among individuals, being more pronounced in patients with high cheekbones and slender faces," Ni Mi explained. She reassured that this change is reversible—chewing muscles gradually recover after treatment concludes. There's no need to rush into exercises mid-treatment, as this may damage teeth and disrupt the correction process.
"Next is enamel damage. During orthodontic treatment, enamel damage typically refers to demineralization, appearing as white spots on teeth," Ni Mi explained. This is caused by poor oral hygiene during treatment. Soft plaque accumulates on tooth surfaces, where bacterial metabolism produces acids that erode enamel. Therefore, enhancing oral hygiene can effectively prevent enamel damage.
"Post-orthodontic gingival recession typically refers to the lowering of the gingival attachment level after crowded teeth are aligned. Teeth aren't flat; they have an inverted triangular or spatula shape. When crowded, the gums squeeze together to fill the space between two teeth. After alignment and separation, the so-called 'black triangles' appear.These 'black triangles' do not affect dental health but may impact aesthetics. During orthodontic treatment, dentists can reduce these gaps through appropriate measures, such as slightly trimming the widest part of shovel-shaped teeth. This tightens the teeth and pushes the gums upward."Tooth mobility," Ni Mi explains, "arises from improper practices like failing to address occlusal trauma, neglecting gum inflammation, or applying excessive force."Regarding the recently popular invisible aligners, Ni Mi noted that while they generally cost more than traditional braces, higher price doesn't necessarily mean better results. Invisible aligners have a relatively narrow range of indications and require professional screening by an orthodontist.Simple cases like basic alignment, closing scattered gaps, or isolated tooth rotations (see Figure 1) are ideal for clear aligners. However, complex cases requiring significant facial changes often yield better results with traditional braces.