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Pedodontics NEET MDS Synopsis - Lecture Notes
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📖 Pedodontics

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Oral Anatomy and Development
Pedodontics
  • At birth: Alveolar process = Gum pad
  • Gum pad segmentation: Transverse groove
  • Division into labio-buccal & lingual: Dental groove
  • Groove between canine & 1st molar: Lateral sulcus
  • Gingival groove (upper arch): Separates gum pad from palate
  • Gum pad shape: Upper = horseshoe; Lower = U-shaped, rectangular
  • Natal teeth: Present at birth
  • Neonatal teeth: Erupt within 30 days
  • Associated syndromes: Ellis-van Creveld, Craniofacial Dysostosis
  • Riga-Fede disease: Ulceration from natal/neonatal teeth
  • Primary dentition period: 6 months to 6 years
  • Primate spaces:
    • Maxilla: Between lateral incisor & canine
    • Mandible: Between canine & 1st molar
  • Most common molar relation: Flush terminal plane
  • Incisal liability: 7 mm (upper), 5 mm (lower)
  • Leeway space:
    • Maxilla: 1.8 mm (0.9 mm each side)
    • Mandible: 3.4 mm (1.7 mm each side)
Natal and Neonatal Teeth
Pedodontics

Natal and neonatal teeth, also known by various synonyms such as congenital teeth, prediciduous teeth, dentition praecox, and foetal teeth. This topic is significant in pediatric dentistry and has implications for both diagnosis and treatment.

Etiology

The etiology of natal and neonatal teeth is multifactorial. Key factors include:

  1. Superficial Position of Tooth Germs: The positioning of tooth germs can lead to early eruption.
  2. Infection: Infections during pregnancy may influence tooth development.
  3. Malnutrition: Nutritional deficiencies can affect dental health.
  4. Eruption Acceleration: Febrile incidents or hormonal stimulation can hasten the eruption process.
  5. Genetic Factors: Hereditary transmission of a dominant autosomal gene may play a role.
  6. Osteoblastic Activities: Bone remodeling phenomena can impact tooth germ development.
  7. Hypovitaminosis: Deficiencies in vitamins can lead to developmental anomalies.

Associated Genetic Syndromes

Natal and neonatal teeth are often associated with several genetic syndromes, including:

  • Ellis-Van Creveld Syndrome
  • Riga-Fede Disease
  • Pachyonychia Congenital
  • Hallemann-Steriff Syndrome
  • Sotos Syndrome
  • Cleft Palate

Understanding these associations is crucial for comprehensive patient evaluation.

Incidence

The incidence of natal and neonatal teeth varies significantly, ranging from 1 in 6000 to 1 in 800 births. Notably:

  • Approximately 90% of these teeth are normal primary teeth.
  • In 85% of cases, the teeth are mandibular primary incisors.
  • 5% are maxillary incisors and molars.
  • The remaining 10% consist of supernumerary calcified structures.

Clinical Features

Clinically, natal and neonatal teeth may present with the following features:

  • Morphologically, they can be conical or normal in size and shape.
  • The color is typically opaque yellow-brownish.
  • Associated symptoms may include dystrophic fingernails and hyperpigmentation.

Radiographic Evaluation

Radiographs are essential for assessing:

  • The amount of root development.
  • The relationship of prematurely erupted teeth to adjacent teeth.

Most prematurely erupted teeth are hypermobile due to limited root development.

Histological Characteristics

Histological examination reveals:

  • Hypoplastic enamel with varying degrees of severity.
  • Absence of root formation.
  • Ample vascularized pulp.
  • Irregular dentin formation.
  • Lack of cementum formation.

These characteristics are critical for understanding the structural integrity of natal and neonatal teeth.

Harmful Effects

Natal and neonatal teeth can lead to several complications, including:

  • Laceration of the lingual surface of the tongue.
  • Difficulties for mothers wishing to breast-feed their infants.

Treatment Options

When considering treatment, extraction may be necessary. However, precautions must be taken:

  • Avoid extractions until the 10th day of life to allow for the establishment of commensal flora in the intestine, which is essential for vitamin K production.
  • If extractions are planned and the newborn has not been medicated with vitamin K immediately after birth, vitamin K supplements should be administered before the procedure to prevent hemorrhagic disease of the newborn (hypoprothrombinemia).
Caries Management in Primary Teeth
Pedodontics

Common Decay Sites

  • Primary first molars: Proximal surfaces below contact points
  • Difficult area for cleaning access
  • Food impaction zone
  • Early detection requires clinical examination and radiographs

Treatment Selection Criteria

Multi-Surface Caries in 5-Year-Olds

  • Treatment of choice: Stainless Steel Crowns (SSC)
  • Provides comprehensive coverage
  • Durable solution for extensive decay
  • Cost-effective long-term restoration

SSC Preparation Standards

  • Finish line design: Feather edge
  • Ensures smooth marginal adaptation
  • Reduces plaque accumulation
  • Minimizes gingival irritation

Adhesive Procedures

Etching Protocols

  • Duration for deciduous teeth: 15-30 seconds
  • Duration for permanent teeth: 15-30 seconds (same as deciduous)
  • Thinner enamel in primary teeth requires careful timing
  • Over-etching can compromise bond strength

Alternative Restorative Approaches

Atraumatic Restorative Treatment (ART)

  • Material of choice: Glass Ionomer Cement (GIC)
  • Key advantages:
    • Adhesive properties for retention
    • Fluoride release for ongoing protection
    • Biocompatibility with pulpal tissues
    • Suitable for field conditions and anxious patients
Moro Reflex and Startle Reflex
Pedodontics

Moro Reflex and Startle Reflex

Moro Reflex

  • The Moro reflex, also known as the startle reflex, is an involuntary response observed in infants, typically elicited by sudden movements or changes in position of the head and neck.

  • Elicitation:

    • A common method to elicit the Moro reflex is to pull the baby halfway to a sitting position from a supine position and then suddenly let the head fall back a short distance.

  • Response:

    • The reflex consists of a rapid abduction and extension of the arms, accompanied by the opening of the hands.
    • Following this initial response, the arms then come together as if in an embrace.

  • Clinical Importance:

    • The Moro reflex provides valuable information about the infant's muscle tone and neurological function.
    • An asymmetrical response may indicate:
      • Unequal muscle tone on either side.
      • Weakness in one arm.
      • Possible injury to the humerus or clavicle.
    • The Moro reflex typically disappears by 2 to 3 months of age, which is a normal part of development.

Startle Reflex

  • The startle reflex is similar to the Moro reflex but is specifically triggered by sudden noises or other unexpected stimuli.

  • Response:

    • In the startle reflex, the elbows are flexed, and the hands remain closed, showing less of an embracing motion compared to the Moro reflex.
    • The movement of the arms may involve both outward and inward motions, but it is less pronounced than in the Moro reflex.

  • Clinical Importance:

    • The startle reflex is an important indicator of an infant's sensory processing and neurological integrity.
    • It can also be used to assess the infant's response to environmental stimuli and overall alertness.