Introduction
White spot lesions are the signs of early tooth decay that are reflected as opaque, chalky white areas on the tooth surface. These lesions represent the demineralization process of the outer layer of the tooth, known as the enamel. This article explores demineralization pathogenesis and how it can be effectively prevented in the initial treatment stages by fluoride therapies for orthodontic patients.
Why Do White Spot Lesions Occur in Orthodontic Patients?
According to documented case reports in dental literature, and as per many orthodontic reports, enamel surface demineralization that seems to occur as a result or during orthodontic treatment seems to be a common dental issue for many patients. These incipient caries or rather the white spots lesions (WSL) that would eventually progress to cavitations are because of the enamel of your tooth being partially demineralized when the functional appliances that are recommended by the orthodontist would need to be worn either for the major duration of the day or in many cases throughout the day. White spot lesions are one of the common side effects in many individuals with poor oral hygiene or with difficulty in implementing proper brushing techniques with tight contact areas of their teeth.
Though preventive dentistry and modern-day orthodontics have seen tremendous appliances in terms of appliance modifications, conservative treatment strategies, and reduced risk of dental cavitations, WSL can still happen or manifest on the weak areas of tooth enamel that are most prone to demineralization. While some cases may experience WSL during the prolonged course of fixed functional appliances or orthodontic treatment, for other cases- WSL can manifest even post-orthodontic treatment as an adverse sequelae of prolonged treatment.
It is important to note that when treating either skeletal or dental malocclusion (improper bite correction and guidance of occlusal plane along with spatial orientation of the upper and lower jaw), these strategies are extremely beneficial to correct orofacial discrepancies or even jaw-based discrepancies.
What Are the Disadvantages of Orthodontic Appliances?
However, the occurrence of WSL in individuals can not only compromise upon successful outcomes of the long-term treatment strategies but would also possibly result in the early stoppage or treatment termination, because dental caries is a continuous process that starts with the prolonged demineralization process of the tooth enamel. Dental caries early lesions without the scope for remineralization treatment can easily progress to extensive cavitation and root canal or pulpal infections. In severe case reports of WSL, it is demonstrated in the field of orthodontics that often, there would be a need for invasive interventions like endodontic therapy or extensive restorative modalities, which is again the dental operators or clinician's responsibility.
The disadvantage of most intrabuccal appliances that are used in orthodontics is that they tend to limit normal self-cleansing mechanisms of the oral cavity, especially from the facial musculature and the immune mediating saliva. Due to several modifications in the patient's oral cavity while wearing fixed appliances, the ingress of bacterial flora in susceptible individuals to dental caries can indeed be easier. The challenges that would be faced by the orthodontist and the restorative dentist are to hence, do with the specific risk factors, where WSL can easily progress to extensive lesions without clinical or restorative management.
Early detection of WSL is extremely important during the orthodontic management of the patients because there can be scope for preventive implementation by the dental operator, that is to arrest the enamel demineralization process before these lesions can further progress most of the current non-invasive prophylactic techniques, hence, aimed at clinical reduction of plaque by mainly sustaining healthy oral hygiene and enamel immunity to resist the demineralization process by bacterial ingress.
How Can Fluorides Promote Remineralization and Prevent White Spot Lesions?
Fluoride agents are the commonly used enamel remineralization measures or gold standard treatment for counteracting WSL. Fluoride ions contain bactericidal and bacteriostatic properties that can prevent the progress of incipient carious lesions. The main risk factors in orthodontic cases are when the patient has:
- Poor oral hygiene.
- Very low or limited salivary volume.
- Improper, high fat, or, sugary diet.
These are the cariogenic factors that help the microbial biofilm to form over the tooth enamel over a long time leading to WSL.
Research shows that whether the teeth are banded or bonded commonly in orthodontic therapy, orthodontic patients still can be prone significantly more to the development of WSLs than non-orthodontic cases. Colonization of the oral cavity with unhealthy bacterial microbiomes such as lactobacillus and Streptococcus can cause a progressive demineralization of tooth enamel. When fixed functional appliances for instance arch wires, springs, brackets, bands, and elastomers can make the susceptible orthodontic patient oral hygiene difficult, then the salivary self-cleaning of buffer capacity to resist the enamel biofilm decreases, leading to possible stagnation or cavitation sites on the tooth enamel.
What Is the Difference Between Professional Versus Self Administered Fluoride Therapy?
Patients who wear orthodontic appliances are the most presently considered patients for risk of WSL, for which orthodontists should thoroughly pre-evaluate the patient based on their lifestyle habits, oral hygiene, and dental, and systemic status. When these factors are monitored prior to the implementation of orthodontic treatment, then early diagnosis and management by the orthodontist or the restorative dentist can help in preventing incipient caries, WSL, and extensive cavitations that would require endodontic or high-end restorative management.
Further, it is imperative for the success of the orthodontic treatment that patients are educated about the risk factors that can predispose them to WSL. A positive interaction with the patient, guidance on proper oral hygiene, or home care instructions with awareness of bucco-dental hygiene would be the key element in improving the success of orthodontic treatment, without the risk of WSL.
There are mainly two different types of treatment regimens for fluoride therapies that are the office-applied and self-care programs In the prevention of WSL. In most of the self-administered programs, patient compliance or understanding of home care instructions can be a significant issue, because the in-office approach can guarantee professional application quickly and easily with high-concentration fluoride gels and varnishes. Another approach by orthodontists Is to incorporate the active fluoride ingredient within the dental bonding or banding material or the auxiliary elastic.
Conclusion
For functional and esthetic management during orthodontic and post-orthodontic treatment, functional appliances can reduce the self-cleansing capacity of the oral cavity. Professional fluoride application and current management of post-orthodontic WSL, with the aid of remineralizing creams such as casein phosphopeptide-stabilized amorphous calcium phosphate (CPP-ACP) or calcium fluoride promotion, can be beneficial to prevent and manage existing WSL.
