Development and Function of Deciduous Teeth
- Primary teeth start forming during the embryonic phase, specifically at the sixth week of tooth development.
- The development of primary teeth begins with the dental lamina and spreads to the posterior region.
- By the eighth week, there are ten buds on the upper and lower arches that will become the primary dentition.
- The eruption of primary teeth typically starts around six months and continues until 25-33 months of age.
- Primary teeth help maintain the arch length within the jaw and guide the eruption pathway of permanent teeth.
- The muscles and jaw bones depend on primary teeth to maintain proper spacing for permanent teeth.
- The roots of primary teeth provide a pathway for the eruption of permanent teeth.
- Primary teeth play a role in the development of a child's speech, smile, and chewing of food.
- Even if primary teeth are removed, children can still eat and chew to a certain extent.

Caries in Deciduous Teeth
- Dental caries, also known as tooth decay and cavities, is a prevalent chronic disease among children worldwide.
- Extensive tooth decay is the most common dental disease in primary dentition.
- An extensive carious lesion affects at least half of a tooth and may involve the pulp.
- Bacterial infection demineralizes and destroys tooth tissues in dental caries.
- Primary teeth are susceptible to caries due to factors like improper oral hygiene and diet.

Treatment for Caries in Deciduous Teeth
- In cases of extensive tooth decay, the pulp must be treated to maintain the health of the tooth and supporting tissues.
- Pulp therapy involves removing decay and infected pulp tissue, then sealing the pulp with medicaments.
- Treatment options for caries in primary teeth include indirect pulp capping, direct pulp capping, pulpotomy, and pulpectomy.
- Indirect pulp capping leaves the deepest carious dentin undisrupted to avoid exposing the pulp.
- Direct pulp capping is performed when a small pulp exposure occurs after carious dentin removal.

Preformed Crowns
- Decayed primary teeth can be restored with preformed crowns made from various materials.
- A common type is the preformed metal crown (PMC), which is pressed over a decayed tooth without any preparation or caries removal.
- Studies have shown that dental practitioners prefer conventional fillings over PMCs.
- However, PMCs have shown lower risks of major and minor failures and pain in the long term compared to conventional restorations.
- Patients fitted with crowns using the Hall technique experienced less discomfort during the procedure.

Recommendations for Pulp Treatment Medicaments and Treatment Recommendations
- Direct pulp capping: No superior medicament identified.
- Pulpotomy: MTA and formocresol are effective, calcium hydroxide is more likely to fail.
- Toxicity concerns: No reports of toxicity related to formocresol use in children.
- Undesirable effect of MTA: Grey discoloration of treated teeth, purely esthetic and doesn't affect success.
- Pulpectomy: No superior medicament identified, zinc oxide eugenol (ZOE) may be the best choice, effective and safe for children.
- No direct comparison of effectiveness between different pulp therapies.
- Similar success rates among various therapies.
- Choice of therapy based on caries removal, pulp exposure, adverse effects, clinical expertise, and patient preference.

Society and Culture
- Primary teeth called baby teeth or milk teeth in most European languages.
- Different emotions experienced during tooth loss influenced by socio-cultural factors.
- Various customs associated with tooth loss, such as the tooth fairy tradition.
- Different traditions for throwing shed teeth, including onto the roof or burying them.
- Cultural customs in different countries, such as offering teeth to the sun or to a visiting relative.