Medical ConditionsBehavior & neurodevelopment: Duchenne muscular dystrophy

Duchenne muscular dystrophy

Also called: DMD; Becker muscular dystrophy is the milder form

Overview

Board takeaway: Plan sedation and general anesthesia around respiratory and cardiac weakness. This X-linked progressive muscle disease predominantly affects boys; weakness spreads from the hips and legs to respiratory and cardiac muscles.

How does Duchenne muscular dystrophy affect dental management?

Medical consultation: cardiac function, respiratory status, steroid use (possible need for stress-dose steroids)
Routine approach: Prefer local anesthesia and nonpharmacologic guidance; avoid respiratory depressants
Anesthesia setting: For deep sedation or GA, use an experienced anesthesia team and a setting with the necessary cardiac, respiratory, and postoperative support; substantial cardiopulmonary weakness generally favors hospital care
Positioning and visits: Treat in the wheelchair or support the head and trunk; short visits
Prevention: Caregiver brushing, power toothbrush, fluoride; plan for declining dexterity

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Risk	Anesthetic implication
Succinylcholine	Avoid: life-threatening hyperkalemia risk.
Volatile anesthetics	Avoid when possible: rhabdomyolysis/hyperkalemia risk under a specialist plan.
Respiratory weakness/cardiomyopathy	Assess reserve and select cardiac, ventilatory, and postoperative support.
Long-term steroids	Confirm an individualized adrenal/perioperative plan.

These drug reactions are distinct from inherited malignant-hyperthermia susceptibility. PPMD, MHAUS-reviewed surgery and anesthesia guidance.

Exam pearl

What is Duchenne muscular dystrophy?

An inherited disorder caused by absent dystrophin, a protein that protects muscle fibers, leading to progressive muscle weakness and degeneration beginning in early childhood.

What are the main systemic features of Duchenne muscular dystrophy?

Inheritance and onset: X-linked; primarily affects boys, with symptoms often beginning at ages 2–5. Some females with a DMD variant have muscle symptoms or cardiomyopathy
Recognition: Proximal weakness, Gowers sign, calf pseudohypertrophy, waddling gait
Progression: Progressive loss of ambulation and scoliosis; the timing varies with treatment and disease course
Cardiopulmonary risk: Progressive respiratory weakness and cardiomyopathy; most common causes of death
Treatment: Long-term corticosteroids (bone loss, adrenal suppression, weight gain); newer gene-targeted therapies
Laboratory clue: Elevated creatine kinase

What oral findings occur in Duchenne muscular dystrophy?

Macroglossia and weak oral and facial muscles
Anterior and posterior open bite; widened arches and crossbites
Plaque accumulation and caries from limited dexterity
Reduced bite force and difficulty chewing and swallowing in later stages

Why is general anesthesia risky in Duchenne muscular dystrophy?

Agent-related risk: succinylcholine can cause life-threatening hyperkalemia; volatile anesthetics can precipitate rhabdomyolysis and hyperkalemia. Avoid succinylcholine and avoid volatile agents when possible under a specialist plan.
Distinction: this dystrophinopathy-related reaction is distinct from inherited malignant hyperthermia susceptibility.
Patient-related risk: respiratory muscle weakness and cardiomyopathy increase risk during and after anesthesia.
Plan: specialist preoperative cardiac/respiratory assessment, an anesthetic technique that avoids these triggers when possible, and a recovery plan that anticipates ventilatory support. Long-term steroid treatment also requires an adrenal plan.

Sources

How does Duchenne muscular dystrophy affect dental management?

Medical consultation: cardiac function, respiratory status, steroid use (possible need for stress-dose steroids)

Routine approach: Prefer local anesthesia and nonpharmacologic guidance; avoid respiratory depressants

Anesthesia setting: For deep sedation or GA, use an experienced anesthesia team and a setting with the necessary cardiac, respiratory, and postoperative support; substantial cardiopulmonary weakness generally favors hospital care

Positioning and visits: Treat in the wheelchair or support the head and trunk; short visits

Prevention: Caregiver brushing, power toothbrush, fluoride; plan for declining dexterity

Scroll across to view all columns

Risk	Anesthetic implication
Succinylcholine	Avoid: life-threatening hyperkalemia risk.
Volatile anesthetics	Avoid when possible: rhabdomyolysis/hyperkalemia risk under a specialist plan.
Respiratory weakness/cardiomyopathy	Assess reserve and select cardiac, ventilatory, and postoperative support.
Long-term steroids	Confirm an individualized adrenal/perioperative plan.

These drug reactions are distinct from inherited malignant-hyperthermia susceptibility. PPMD, MHAUS-reviewed surgery and anesthesia guidance.

What are the main systemic features of Duchenne muscular dystrophy?

Inheritance and onset: X-linked; primarily affects boys, with symptoms often beginning at ages 2–5. Some females with a DMD variant have muscle symptoms or cardiomyopathy

Recognition: Proximal weakness, Gowers sign, calf pseudohypertrophy, waddling gait

Progression: Progressive loss of ambulation and scoliosis; the timing varies with treatment and disease course

Cardiopulmonary risk: Progressive respiratory weakness and cardiomyopathy; most common causes of death

Treatment: Long-term corticosteroids (bone loss, adrenal suppression, weight gain); newer gene-targeted therapies

Laboratory clue: Elevated creatine kinase

Why is general anesthesia risky in Duchenne muscular dystrophy?

Agent-related risk: succinylcholine can cause life-threatening hyperkalemia; volatile anesthetics can precipitate rhabdomyolysis and hyperkalemia. Avoid succinylcholine and avoid volatile agents when possible under a specialist plan.

Distinction: this dystrophinopathy-related reaction is distinct from inherited malignant hyperthermia susceptibility.

Patient-related risk: respiratory muscle weakness and cardiomyopathy increase risk during and after anesthesia.

Plan: specialist preoperative cardiac/respiratory assessment, an anesthetic technique that avoids these triggers when possible, and a recovery plan that anticipates ventilatory support. Long-term steroid treatment also requires an adrenal plan.