Fluoride toothpaste for dentine caries can play an important role in managing and arresting carious lesions in preschool children. Regular use of fluoride toothpaste helps strengthen developing teeth, support enamel and dentine remineralization, and reduce the progression of dental caries. Understanding how fluoride concentration, brushing habits, and professional dental care work together can help parents and dental professionals make informed decisions about caries control in young children.
When dentine caries is identified in a preschool child, the clinical focus is not always limited to restorative treatment. In appropriate situations, controlling the caries process and supporting lesion arrest can also form part of a preventive approach.
Evidence from a longitudinal study by Lo, Schwarz and Wong examined whether a simple prevention programme could help stabilise dentine caries in preschool children. The programme included regular oral health education and daily toothbrushing with 1000 ppm fluoride toothpaste. After three years, 45% of the caries lesions on proximal surfaces of primary anterior teeth identified at baseline and previous annual examinations in the prevention group had become arrested.
The findings provide useful clinical evidence for considering fluoride toothpaste within a broader caries-control programme for preschool children. However, the study evaluated a prevention programme rather than fluoride toothpaste as an isolated treatment, so the results should be interpreted in that context.
Understanding Dentine Caries in Preschool Children
Dentine caries represents a stage of carious disease in which the lesion has progressed beyond the enamel and involved dentine. In young children, progression can be clinically important because primary teeth have a relatively short time between eruption and exfoliation.
Once dentine is involved, the clinician needs to assess the activity and severity of the lesion, the child’s overall caries risk and the family’s ability to maintain preventive measures.
Progression From Enamel Caries to Dentine Caries
Dental caries develops as a process rather than appearing suddenly as a cavity. An early enamel lesion may progress if the factors driving demineralisation continue.
When caries extends into dentine, management becomes more clinically significant. At this stage, the objective is to control disease activity and prevent further progression wherever appropriate.
For preschool children, this makes early identification particularly important. Regular examination allows the practitioner to identify lesions at different stages and determine whether a preventive or restorative approach is appropriate.
Importance of Early Caries Control
Caries control in preschool children requires attention to the child’s daily oral environment. Brushing, fluoride exposure, dietary habits and parental involvement all contribute to whether the disease process continues or becomes stabilised.
The study by Lo et al. is relevant because the children in the prevention group did not receive restorative or other curative treatment due to limitations in dental resources. Instead, the programme focused on oral health education and daily toothbrushing with fluoridated toothpaste.
The study therefore provides evidence that a relatively simple preventive programme can contribute to stabilising the caries situation in a community where access to intensive dental treatment may be limited.
Role of Fluoride Toothpaste in Caries Arrest
Fluoride toothpaste is primarily used as part of daily caries prevention, but its role in controlling existing caries activity is also clinically relevant.
The 1998 study provides an example of how daily fluoride toothpaste use can be incorporated into a wider preventive programme for preschool children with existing caries.
Evidence for 1000 ppm Fluoride Toothpaste
The prevention programme studied by Lo, Schwarz and Wong involved 168 children aged 3 to 6 years attending one kindergarten. The children participated in regular oral health education sessions and a daily toothbrushing exercise using 1000 ppm fluoride toothpaste. A control group consisted of 121 children from two other kindergartens without the preventive programme.
The study followed the children longitudinally and assessed changes in caries status over three annual examinations.
At the third annual examination, 45% of the caries lesions on proximal surfaces of primary anterior teeth in the prevention group that had been identified at baseline and previous annual examinations had become arrested.
This finding supports the potential value of incorporating 1000 ppm fluoride toothpaste into a structured preventive programme for preschool children.
Importantly, the study does not establish that 1000 ppm fluoride toothpaste alone was responsible for every arrested lesion. The intervention also included regular oral health education, and the statistical analysis found that baseline caries experience, the prevention programme, gender and oral hygiene were associated with the number of arrested carious surfaces.
Daily Toothbrushing as a Preventive Intervention
The practical value of the study lies partly in its use of a simple daily intervention.
The children in the prevention programme participated in daily toothbrushing using fluoridated toothpaste, alongside regular oral health education. This approach did not depend on complex equipment or intensive clinical treatment.
For communities where access to dental personnel or restorative care is limited, consistent daily brushing can therefore form an important part of a broader preventive strategy.
For pediatric dental practitioners, this reinforces the importance of making home and school-based preventive practices realistic and sustainable.
Clinical Evidence From Preschool Children
The study by Lo et al. was conducted in Southern China and specifically examined preschool children participating in a preventive programme.
Its findings are particularly relevant to clinicians because they demonstrate that changes in caries activity can be observed over time when preventive measures are maintained.
Study Population and Preventive Programme
The study included 168 children aged 3 to 6 years in the intervention kindergarten and 121 children from two other kindergartens as controls.
The intervention included:
- Regular oral health education sessions
- Daily toothbrushing
- Fluoridated toothpaste containing 1000 ppm fluoride
Because of limited resources and dental personnel, restorative and other curative treatments were not provided as part of the programme.
This is an important detail when interpreting the findings. The study evaluated the effect of a community prevention programme rather than testing fluoride toothpaste as a standalone clinical treatment.
Changes in Dentine Caries Over the Study Period
The researchers assessed the children over three annual examinations and looked specifically at the rehardening of carious lesions, described as arrested caries.
Arrested dentine caries was observed in both the intervention and control groups. In the prevention group, 45% of the relevant proximal lesions on primary anterior teeth had become arrested by the third annual examination.
The authors concluded that the findings supported the use of simple preventive programmes to stabilise the caries situation in communities where intensive use of trained dental personnel was not feasible.
Caries Arrest in Primary Anterior Teeth
The finding of particular clinical interest was the arrest of caries on the proximal surfaces of primary anterior teeth.
At the third annual examination, 45% of the lesions in the prevention group that had been identified at baseline and previous annual examinations were recorded as arrested.
This demonstrates that caries lesions in primary teeth can become arrested under a sustained preventive programme.
However, the finding should not be interpreted as a guarantee that all dentine lesions will arrest with fluoride toothpaste. Lesion characteristics, baseline disease experience, oral hygiene and the broader preventive environment can influence outcomes.
Importance of Consistent Daily Brushing
The preventive programme relied on daily toothbrushing rather than occasional intervention.
This is clinically important because fluoride toothpaste works within the context of repeated exposure. A recommendation for fluoride toothpaste is most useful when it is accompanied by consistent brushing and appropriate parental or caregiver support.
The study’s analysis found that oral hygiene was among the factors that had a significant effect on the number of tooth surfaces with arrested caries at the third annual examination.
For pediatric dental practice, this reinforces a practical point: consistent daily oral hygiene remains central to caries control in preschool children.
Clinical Implications for Pediatric Dentists
The evidence from Lo et al. supports considering simple preventive measures as part of caries management in preschool children, particularly when the clinical situation is suitable for non-invasive management.
Non-Invasive Management of Early Carious Lesions
Not every carious lesion in a preschool child should automatically be approached in the same way.
The clinician should assess lesion activity, depth, location, symptoms, oral hygiene, caries risk and the child’s ability to maintain preventive measures.
Where a lesion is suitable for non-invasive management, controlling the factors that drive caries progression becomes important. Fluoride toothpaste can be incorporated into this approach alongside effective plaque control, dietary advice and regular monitoring.
The Lo et al. study provides evidence that dentine caries lesions can become arrested within a structured preventive programme, but it should not be interpreted as evidence that all dentine caries can be managed with toothpaste alone.
Integrating Fluoride Toothpaste Into Preventive Care
A fluoride toothpaste recommendation should be part of a broader preventive plan.
For preschool children, the plan can include:
- Regular brushing with an appropriate fluoride toothpaste
- Consistent daily toothbrushing
- Oral hygiene instruction
- Dietary counselling where required
- Parent or caregiver involvement
- Regular clinical assessment
- Monitoring of existing carious lesions
The evidence from the study is particularly relevant because the intervention combined 1000 ppm fluoride toothpaste with regular oral health education, rather than relying on toothpaste as an isolated intervention.
Importance of Parent-Assisted Brushing
Preschool children are still developing the motor skills needed for effective toothbrushing. Parents and caregivers therefore play an important role in ensuring that brushing takes place regularly and effectively.
In clinical practice, parents can be shown the appropriate brushing technique and toothpaste quantity for the child’s age. They can also be encouraged to make brushing a consistent part of the child’s daily routine.
When existing caries is present, this support becomes particularly important because the objective is not only to maintain oral hygiene but also to help control disease activity.
Practical Recommendations for Caries Control
The evidence from Lo et al. suggests several practical considerations for clinicians managing caries in preschool children.
Assess the lesion before deciding on management. Determine whether the lesion is active, its location and extent, and whether non-invasive management is appropriate.
Include fluoride toothpaste in daily preventive care. The study used a toothpaste containing 1000 ppm fluoride as part of its prevention programme.
Emphasise consistency. Daily toothbrushing was a core component of the intervention, making regularity an important part of the preventive approach.
Address oral hygiene as a whole. The study found that oral hygiene was associated with the number of arrested carious surfaces.
Educate parents and caregivers. Fluoride toothpaste is most useful when children receive appropriate assistance and maintain regular brushing.
Monitor existing lesions. A lesion being managed non-invasively still requires clinical observation. Changes in activity, progression, symptoms or other clinical findings may require a change in management.
Remember the limits of the evidence. The study evaluated a broader prevention programme in Chinese preschool children. Its results should therefore be applied as clinical evidence for preventive caries control, not as proof that fluoride toothpaste alone arrests every dentine lesion.
Key Clinical Takeaways
- A longitudinal study by Lo, Schwarz and Wong evaluated a preventive programme in 168 children aged 3 to 6 years using regular oral health education and daily toothbrushing with 1000 ppm fluoride toothpaste.
- A control group included 121 children from two kindergartens without the preventive programme.
- After three annual examinations, 45% of the relevant proximal caries lesions on primary anterior teeth in the prevention group had become arrested.
- Arrested dentine caries was observed in both intervention and control groups, so the findings should not be attributed to fluoride toothpaste alone.
- The study found that baseline caries experience, the prevention programme, gender and oral hygiene were associated with the number of arrested carious surfaces.
- The findings support the role of simple, consistent preventive programmes in stabilising caries in preschool children, particularly where access to intensive dental treatment is limited.
- For pediatric dentists, fluoride toothpaste should be viewed as one component of a broader strategy that includes effective daily brushing, oral hygiene education, parental involvement and clinical monitoring.
The evidence therefore supports a measured answer to the question: yes, fluoride toothpaste can be part of a preventive programme that helps arrest dentine caries in preschool children, but the evidence from this study concerns a broader programme rather than fluoride toothpaste as a standalone treatment. This distinction is important when translating clinical research into pediatric dental practice.
Reference
Lo ECM, Schwarz E, Wong MCM. Arresting dentine caries in Chinese preschool children. International Journal of Paediatric Dentistry. 1998;8(4):253–260. doi:10.1046/j.1365-263x.1998.00094.x.
