DMFT (Decayed, Missing, Filled Teeth) score takes into account both deciduous (primary) and permanent teeth.

To calculate the DMFT score for the child based on the information provided:

1. Decayed Teeth (D):

   • 6 active carious lesions in deciduous teeth.
   • No mention of decayed permanent teeth, so D = 0 for permanent teeth.
   • Total D = 6 (from deciduous teeth).

2. Missing Teeth (M):

   • 1 missing deciduous tooth.
   • 4 missing permanent third molars (not counted in DMFT since they are not included in the DMFT calculation until the child is older).
   • Total M = 1 (from deciduous teeth).

3. Filled Teeth (F):

   • 1 filled permanent tooth.
   • No filled deciduous teeth mentioned, so F = 0 for deciduous teeth.
   • Total F = 1 (from permanent teeth).

Now, we can calculate the DMFT score:

[ DMFT = D + M + F ]

Substituting the values:

[ DMFT = (6 + 0) + (1 + 0) + 1 = 6 + 1 + 1 = 8 ]

So, the DMFT score for this child is 8.

If the question is asking for the df score (which only considers deciduous teeth), it would be:

[df = 6 + 0 + 1 = 7 ]

In summary:

• DMFT score (including both deciduous and permanent teeth) = 8.
• df score (only deciduous teeth) = 7.

 Randomization is a key component in experimental design that helps to minimize bias by distributing potential confounding variables evenly among the treatment and control groups. This process increases the likelihood that any observed differences between the groups are due to the treatment itself rather than pre-existing characteristics of the participants.

Consistent methods of evaluating a patient’s oral hygiene are considered desirable because they allow the patient’s commitment to improvement to be monitored (Answer: 4). By using the same method at each visit, dental professionals can track changes in the patient’s oral health and hygiene habits over time. This helps in tailoring the oral hygiene instructions and treatment plans to the patient’s individual needs and progress.

Custom-formed mouth protectors are made from impressions of the patient’s teeth and offer the best fit and protection. They are typically made by a dental professional and are more comfortable than stock or boil-and-bite mouthguards. While plastic molded and stock mouthguards are also available, custom-formed ones are considered superior in terms of protection and compliance.

The generally accepted "certainly lethal dose" range for 70 kg adults, i.e., from 5 to 10 g of sodium fluoride or from 32 to 64 mg fluoride/kg

The concept of a "probably toxic dose" (PTD) is advanced. The PTD, 5.0 mg F/kg, is defined as the dose of ingested fluoride that should trigger immediate therapeutic intervention and hospitalization because of the likelihood of serious toxic consequences.