Localized Aggressive Periodontitis and Necrotizing Ulcerative Gingivitis

Localized Aggressive Periodontitis (LAP)

Localized aggressive periodontitis, previously known as localized juvenile periodontitis, is characterized by specific microbial profiles and clinical features.

• Microbiota Composition:
  • The microbiota associated with LAP is predominantly composed of:
    • Gram-Negative, Capnophilic, and Anaerobic Rods.
  • Key Organisms:
    • Actinobacillus actinomycetemcomitans: The main organism involved in LAP.
    • Other significant organisms include:
      • Porphyromonas gingivalis
      • Eikenella corrodens
      • Campylobacter rectus
      • Bacteroides capillus
      • Spirochetes (various species).
  • Viral Associations:
    • Herpes viruses, including Epstein-Barr Virus-1 (EBV-1) and Human Cytomegalovirus (HCMV), have also been associated with LAP.

Necrotizing Ulcerative Gingivitis (NUG)

• Microbial Profile:
  • NUG is characterized by high levels of:
    • Prevotella intermedia
    • Spirochetes (various species).
• Clinical Features:
  • NUG presents with necrosis of the gingival tissue, pain, and ulceration, often accompanied by systemic symptoms.

Microbial Shifts in Periodontal Disease

When comparing the microbiota across different states of periodontal health, a distinct microbial shift can be identified as the disease progresses from health to gingivitis to periodontitis:

1. From Gram-Positive to Gram-Negative:

   • Healthy gingival sites are predominantly colonized by gram-positive bacteria, while diseased sites show an increase in gram-negative bacteria.

2. From Cocci to Rods (and Later to Spirochetes):

   • In health, cocci (spherical bacteria) are prevalent. As the disease progresses, there is a shift towards rod-shaped bacteria, and in advanced stages, spirochetes become more prominent.

3. From Non-Motile to Motile Organisms:

   • Healthy sites are often dominated by non-motile bacteria, while motile organisms increase in number as periodontal disease develops.

4. From Facultative Anaerobes to Obligate Anaerobes:

   • In health, facultative anaerobes (which can survive with or without oxygen) are common. In contrast, obligate anaerobes (which thrive in the absence of oxygen) become more prevalent in periodontal disease.

5. From Fermenting to Proteolytic Species:

   • The microbial community shifts from fermentative bacteria, which primarily metabolize carbohydrates, to proteolytic species that break down proteins, contributing to tissue destruction and inflammation.

Classification of Embrasures

1. Type I Embrasures:

   • Description: These are characterized by the presence of interdental papillae that completely fill the embrasure space, with no gingival recession.
   • Recommended Cleaning Device:
     • Dental Floss: Dental floss is most effective in cleaning Type I embrasures. It can effectively remove plaque and debris from the tight spaces between teeth.

2. Type II Embrasures:

   • Description: These embrasures have larger spaces due to some loss of attachment, but the interdental papillae are still present.
   • Recommended Cleaning Device:
     • Interproximal Brush: For Type II embrasures, interproximal brushes are recommended. These brushes have bristles that can effectively clean around the exposed root surfaces and between teeth, providing better plaque removal than dental floss in these larger spaces.

3. Type III Embrasures:

   • Description: These spaces occur when there is significant loss of attachment, resulting in the absence of interdental papillae.
   • Recommended Cleaning Device:
     • Single Tufted Brushes: Single tufted brushes (also known as end-tuft brushes) are ideal for cleaning Type III embrasures. They can reach areas that are difficult to access with traditional floss or brushes, effectively cleaning the exposed root surfaces and the surrounding areas.

• Blood transfusion: Always consider FNHTR first for fever during transfusion
• G6PD deficiency: Heinz bodies are pathognomonic; estrogen is safe
• BMT infections: HSV earliest, interstitial pneumonitis at 7 weeks
• Prevention: Patient education and prophylaxis are crucial in all three conditions

Morphological Classification

Three-Wall Defect (Intrabony Defect)

• Description: Defect contained by three bony walls
• Prognosis: Best regenerative potential
• Treatment: Ideal candidate for GTR procedures

Two-Wall Defect (Crater)

• Description: Defect between two adjacent teeth
• Characteristics: Interdental bone loss
• Prevalence: Most common osseous defect in chronic periodontitis

One-Wall Defect (Hemiseptum)

• Description: Defect with only one remaining bony wall
• Prognosis: Poorest regenerative potential
• Treatment: Often requires resective therapy

Bone Loss Patterns

Horizontal Bone Loss

• Associated Pocket Type: Suprabony pocket
• Pattern: Uniform reduction in alveolar bone height
• Radiographic Appearance: Horizontal radiolucency

Vertical/Angular Bone Loss

• Associated Pocket Type: Infrabony pocket
• Pattern: Uneven bone destruction
• Clinical Significance: More complex treatment requirements

• Biological Width: Composed of connective tissue (1.07 mm) and epithelial attachment (0.97 mm).
• Gingival Sulcus: Shallower in primary teeth; probing depth is 1 – 2 mm.
• Gingival Blood Supply: Includes supraperiosteal arterioles, periodontal ligament vessels, and interdental septa arterioles.
• GCF (Gingival Crevicular Fluid): Can be exudative or transudative; becomes exudative during inflammation.

Pediatric & Pregnancy Considerations

• Safest Dental Care Period: Early second trimester.
• Pregnancy Gingivitis: Characterized by pronounced bleeding.
• Puberty-Related Changes: Increase in P. intermedia and Capnocytophaga.