19.3 Special Care Dentistry: Geriatric, Special Needs, and Medically Compromised Patients

9.4 Special Care Dentistry: Geriatric, Special Needs, and Medically Compromised Patients

Down Syndrome (Trisomy 21)

Down Syndrome is the most common chromosomal abnormality, resulting from an extra copy of chromosome 21 (Trisomy 21).

Oral Manifestations & Clinical Risk Profiles

• Orofacial Features: Relative macroglossia (large tongue relative to hypoplastic maxilla), fissured tongue, microdontia, peg-shaped lateral incisors, delayed eruption sequence, hypodontia (missing teeth), high-arched palate, and Class III malocclusion with an anterior open bite and posterior crossbite.
• Caries Risk vs. Periodontal Risk (Exam High-Yield):
  • Low Caries Risk: Down syndrome patients exhibit significantly lower caries rates due to delayed tooth eruption, microdontia, widely spaced dentition, and elevated salivary pH and bicarbonate buffering capacity.
  • High Periodontal Risk: Patients develop severe, rapid, early-onset periodontitis starting in adolescence or early childhood. Bone loss is aggressive and driven by intrinsic immune dysfunction: impaired neutrophil chemotaxis, altered T-cell immunity, and defective collagen cross-linking.
• Atlantoaxial Instability (AAI) Precautions: 15% to 20% of Down syndrome patients possess hypermobility of the C1–C2 atlantoaxial joint.
  • Strict Clinical Rule: Avoid hyperextending or forcefully rotating the patient's neck during dental chair positioning or treatment to prevent subluxation, spinal cord compression, or quadriplegia.
• Congenital Heart Defects: ~50% of patients have endocardial cushion defects or ventricular septal defects (VSD); evaluate current AHA guidelines for infective endocarditis antibiotic prophylaxis requirements prior to invasive procedures.

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Cerebral Palsy (CP)

Cerebral palsy is a group of non-progressive motor impairment disorders caused by brain injury or malformation during prenatal, perinatal, or early infant brain development.

Clinical Manifestations & Operatory Guidance

• Motor Classifications:
  • Spasticity (hypertonia, muscle stiffness, exaggerated reflexes; ~70–80% of cases).
  • Athetosis / Dyskinesia (uncontrolled, slow, writhing involuntary movements).
  • Ataxia (lack of voluntary muscle coordination and balance).
• Oral Findings: High prevalence of severe bruxism (causing extensive enamel wear), enamel hypoplasia, Class II Division 1 malocclusion, mouth breathing, incompetence of lip seal, and dysphagia (swallowing impairment).
• Clinical Management Rules:
  • Aspiration Protection: Maintain semi-upright dental chair positioning and use high-volume suction to manage dysphagia and hyperactive gag reflex.
  • Mouth Props: Use soft rubber mouth props (e.g., McKesson prop or padded tongue blade). Never place unprotected fingers between teeth during involuntary jaw muscle spasms.
  • Physical Support: Place soft pillows or body contours to support spastic limbs and maintain comfortable physical stability without forceful restriction.

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Autism Spectrum Disorder (ASD)

Autism Spectrum Disorder is a neurodevelopmental disorder characterized by persistent challenges in social communication, restricted interests, and heightened sensory sensitivities.

Sensory Management & Behavioral Adaptations

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Geriatric Oral Health & Drug-Induced Xerostomia

Geriatric dental care focuses on age-related physiological changes, polypharmacy, and root caries management in an aging population.

Drug-Induced Xerostomia & Culprit Medications

Xerostomia (dry mouth) in elderly patients is primarily caused by polypharmacy, not aging alone. Over 400 prescription medications reduce salivary flow rates.

• Major Culprit Medication Classes:
  1. Anticholinergics (atropine, scopolamine, hyoscyamine)
  2. Antihistamines (diphenhydramine, chlorpheniramine, loratadine)
  3. Antihypertensives (beta-blockers, diuretics, ACE inhibitors, calcium channel blockers)
  4. Antidepressants (tricyclics e.g., amitriptyline; SSRIs e.g., fluoxetine, sertraline)
  5. Anxiolytics & Sedatives (benzodiazepines, hypnotics)
• Clinical Sequelae: Loss of salivary cleansing, lubrication, and buffering capacity leads to rampant Root Caries, oral candidiasis, burning mouth symptoms, altered taste (dysgeusia), and loss of denture retention.

Root Caries Prevention & Treatment Protocol

1. High-Potency Prescription Fluoride: 1.1% Neutral Sodium Fluoride (5000 ppm) toothpaste (e.g., Fluoridex, Clinpro 5000) brushed daily at bedtime.
2. Non-Invasive Arrest: Apply 38% Silver Diamine Fluoride (SDF) to active, soft cervical root caries lesions.
3. Glass Ionomer Restorations: Resin-modified glass ionomer (RMGI) is the restorative material of choice for cervical root lesions due to fluoride release and chemical dentin bonding.
4. Salivary Substitutes & Sialogogues: Carboxymethylcellulose sprays (Biotene); prescribe Pilocarpine (5 mg TID) or Cevimeline (30 mg TID) if functional salivary gland parenchyma remains.

Burning Mouth Syndrome (BMS)

Chronic intraoral burning sensation without detectable mucosal lesions or systemic etiology, predominantly affecting postmenopausal females.

• Target Sites: Anterior two-thirds and lateral borders of the tongue (glossodynia), palate, and lips.
• Diagnostic Rule: Exclude secondary causes (Vitamin B12/Folate/Iron deficiency, Type 2 diabetes, oral candidiasis, dry mouth, GERD).
• Management: Low-dose systemic clonazepam, alpha-lipoic acid, or tricyclic antidepressants.

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Physical Accessibility & Wheelchair Transfer Techniques

Safe patient handling requires adhering to ADA accessibility guidelines and proper biomechanical transfer protocols.

Wheelchair Transfer Setup:
1. Position wheelchair parallel or at 30-45° angle facing head of dental chair.
2. LOCK wheelchair brakes firmly.
3. Raise or remove footrests and armrests.
4. Adjust dental chair height to match or sit slightly lower than wheelchair seat.

Transfer Execution Protocols

• One-Person Sliding Pivot Transfer:
  • Operator stands facing patient, places feet outside patient's feet, bends knees, and wraps arms around patient's torso (or grasps transfer belt).
  • Pivot on feet together, pulling patient close to operator's center of gravity, and lower patient gently into dental chair.
• Two-Person Transfer (Dependent Patients):
  • Operator 1 (Behind): Stands behind wheelchair, reaches under patient's armpits, and crosses patient's arms over chest, grasping wrists.
  • Operator 2 (Beside): Stands alongside patient's legs, placing hands under knees and thighs.
  • Execution: On count of three, lift in unison and transfer patient smoothly into dental chair.