Populations and Risk Factors
- Individuals exposed to high-energy trauma: falls, motor vehicle accidents, contact sports
- Those with pathological bone weakening: osteoporosis (most common — vertebral compression fractures, hip fractures, Colles fractures), bone tumors (primary or metastatic), Paget disease, osteogenesis imperfecta
- Athletes and military recruits: stress (fatigue) fractures from repetitive overloading without adequate recovery
- Children: susceptible to greenstick fractures (incomplete fracture — one cortex breaks, the other bends) and growth plate (Salter-Harris) fractures due to incomplete ossification
- Elderly: osteoporotic compression fractures and hip fractures are major causes of morbidity and mortality; falls are the leading cause
- Hormonal factors: postmenopausal estrogen loss accelerates bone density decline; corticosteroid use weakens bone
- Nutritional deficiencies: calcium, vitamin D, and protein deficiency impair bone strength and healing
Causes and Pathophysiology
Fracture Mechanisms
- Sudden traumatic: direct trauma from falls, MVAs, or blows; indirect trauma from transmitted force through a lever arm (e.g., falling on an outstretched hand producing Colles fracture)
- Repetitive stress (fatigue): microscopic fissures accumulate from repeated loading that exceeds the bone's remodeling capacity; common in metatarsals, tibia, and femoral neck
- Pathological: bone weakened by disease fractures under normal physiological loading; osteoporotic vertebral compression fractures may occur from coughing or bending
Fracture Classification
| Type | Mechanism | Key Features |
|---|---|---|
| Closed (simple) | Any | Skin intact; lower infection risk |
| Open (compound) | High-energy | Bone protrudes through skin; high infection/osteomyelitis risk |
| Transverse | Angular/bending force | Straight line across the bone shaft |
| Oblique | Angular force at an angle | Fracture line at angle other than 90 degrees |
| Spiral | Torsional (twisting) force | Fracture spirals around the bone shaft; common in child abuse (toddler spiral fracture of the tibia) |
| Comminuted | High-energy crush/impact | Bone splintered into 3+ fragments; high-energy injury |
| Impacted | Compressive force | One fragment driven into another; may be stable |
| Avulsion | Sudden muscle/ligament pull | Fragment pulled away from bone at the attachment site |
| Greenstick | Bending in immature bone | One cortex breaks, the other bends; children only |
| Stress (fatigue) | Repetitive overloading | Microscopic fissures; no discrete fracture line on early imaging |
| Compression | Axial loading | Vertebral body crushed; common in osteoporosis |
| Pathological | Normal load on weakened bone | Fracture through diseased bone (osteoporosis, tumor, Paget) |
Bone Healing Phases
Reactive/Inflammatory Phase (Hours to Days)
- Fracture hematoma forms within 6–8 hours as blood vessels in the periosteum, Haversian canals, and marrow cavity bleed into the fracture site.
- Nearby bone cells (osteocytes) die; inflammatory cells (neutrophils, macrophages) migrate to the site to remove debris.
- The hematoma provides the initial scaffold for repair cells; disrupting this hematoma (by mechanical force) delays healing.
Reparative Phase (Weeks to Months)
- Soft callus (approximately 3 weeks): fibroblasts and chondroblasts invade the hematoma and produce a fibrocartilaginous bridge connecting the fragments — this is mechanically weak but provides initial stabilization.
- Hard callus (3–4 months): osteoblasts replace fibrocartilage with woven (spongy) bone, forming a bony callus that unites the fragments — this is stronger but bulkier than normal bone.
Remodeling Phase (Months to Years)
- Osteoclasts resorb dead bone and excess callus; osteoblasts deposit compact (lamellar) bone along lines of mechanical stress (Wolff's law).
- The fracture site gradually approaches (but never fully matches) the strength and shape of the original bone.
Healing Timelines
- Children: 4–6 weeks (rapid periosteal growth, excellent remodeling capacity)
- Adolescents: 6–8 weeks
- Adults: 10–18 weeks (longer for lower extremity weight-bearing bones)
- Stress fractures: typically 2–4 weeks of reduced activity
- Full pre-injury strength and function: up to 6 months or longer
- Factors delaying healing: smoking (30% slower), diabetes, malnutrition, infection, inadequate immobilization, NSAIDs (controversial — may impair early healing)
The Percussion Test — Why It Works
- Vibration transmitted through intact bone travels freely; at a fracture site, the discontinuity absorbs vibrational energy, producing localized pain.
- The percussion test (tuning fork or firm tapping at a distance from the suspected fracture, transmitting vibration through the bone) reproduces pain at the fracture site without directly palpating the injury.
Signs and Symptoms
- Intense localized pain and protective muscle guarding (splinting)
- Swelling and sharp tenderness at the fracture site
- Visible angulation, limb shortening (muscle override pulling fragments together), or abnormal rotation
- Crepitus: grating or crackling sound/sensation when bone fragments rub (do not deliberately reproduce)
- Ecchymosis (bruising) or fracture blisters (from soft tissue damage)
- Severe limitation or complete inability to use the affected limb
- Open fracture: bone visible through the skin wound — high infection risk
Assessment Profile
Subjective Presentation
- Chief complaint: acute — "I fell and my arm/leg is severely painful and I can't use it" or "I heard a crack"; stress fracture — "I have a pain in my shin/foot that gets worse with running and better with rest, but it's been getting progressively worse"; pathological — "I sneezed and felt a sharp pain in my back" (osteoporotic compression fracture)
- Pain quality: intense, sharp, localized pain that worsens with any movement of the affected area; deep, throbbing pain from hematoma and swelling; stress fracture — aching that progresses to sharp with continued loading
- Onset: acute traumatic fractures have a clear mechanism; stress fractures develop gradually over days to weeks; pathological fractures may occur with minimal or no trauma
- Aggravating factors: any movement of the affected limb; weight-bearing; vibration; palpation near the site
- Easing factors: immobilization (splinting); elevation; ice; prescribed analgesics; non-weight-bearing
- Red flags: Open fracture (bone visible through wound) — emergency; high infection risk. Loss of distal pulses, sensation, or color (compartment syndrome) — vascular emergency. Fracture in the elderly from minimal trauma — investigate for pathological cause (osteoporosis, metastatic disease). Growth plate fracture in children — risk of growth disturbance; orthopedic referral.
Observation
- Local inspection: angulation, shortening, or rotation of the limb; ecchymosis, swelling, and fracture blisters; open wound with bone visible (compound fracture); compare limb alignment and length bilaterally; deformity may be subtle in non-displaced or stress fractures
- Posture: guarding the injured limb close to the body; compensatory weight shift to the uninjured side; protective posturing to avoid any movement of the affected area
- Gait: non-weight-bearing on the affected lower extremity (acute); antalgic gait with shortened stance phase (stress fracture or post-immobilization); may use crutches, walker, or wheelchair
Palpation
- Tone: intense protective muscle splinting (guarding) around the fracture site — muscles crossing the fracture are in maximal contraction to immobilize the fragments; post-immobilization — muscle atrophy and hypotonia from disuse
- Tenderness: sharp, localized pinpoint tenderness directly over the fracture site; tenderness may extend along the periosteum; reduced tenderness as healing progresses (6+ weeks); post-immobilization — diffuse tenderness from muscle wasting and tissue deconditioning
- Temperature: acute — warmth from inflammation and hematoma; chronic healing — gradually normalizing; persistent warmth beyond expected timeline may indicate infection (osteomyelitis) or delayed union
- Tissue quality: acute — edematous, boggy tissue from hemorrhage and inflammation; palpable step-off deformity at the fracture site (displaced fractures); crepitus (do not deliberately reproduce — confirmation without provoking); post-immobilization — atrophied muscle, stiff periarticular tissue, joint effusion
Motion Assessment
- AROM: acute fracture — AROM is severely limited or impossible; the patient cannot use the adjacent joint due to loss of the skeletal lever; post-immobilization — AROM is restricted by muscle atrophy, joint stiffness, and tissue deconditioning; document available range and compare bilaterally
- PROM / end-feel: acute — pain occurs before tissue resistance is reached (empty end-feel); involuntary muscle spasm (guarding) prevents reaching the anatomical barrier; post-immobilization — capsular or muscular end-feel depending on the tissue restricting motion; bony end-feel if callus or heterotopic ossification limits range
- Resisted testing: acute — pain on any resisted movement due to muscle contraction transmitting force to the fracture site; post-immobilization — weakness from atrophy proportional to the duration of immobilization; test against the opposite side for comparison
Special Test Cluster
| Test | Positive Finding | Purpose |
|---|---|---|
| Percussion / Vibration Test (CMTO) | Pain at the suspected fracture site when vibration is transmitted through the bone from a distance (tuning fork on bone remote from injury, or tap on the heel for tibial fracture) | Confirm fracture without directly palpating the injury site; increased pain at the fracture indicates structural discontinuity |
| Axial Load Test (CMTO) | Increased pain or crepitus when gentle axial compression is applied along the bone's long axis | Confirm structural discontinuity in the bone shaft; do not perform if fracture is obvious (unnecessary provocation) |
| Neurovascular Screen (Distal Pulses, Sensation, Color) (CMTO — red flag screen) | Absent or diminished distal pulses; numbness or tingling; pale, cool, or cyanotic distal tissue | Screen for vascular or nerve compromise — absent pulses or compartment syndrome signs require emergency intervention |
| Compartment Pressure Assessment (Clinical) (supplementary — red flag screen) | Pain with passive stretch of muscles in the affected compartment; tense swelling; pain out of proportion to injury | Suspect compartment syndrome — surgical emergency; fasciotomy required within 6 hours to prevent permanent damage |
Clinical decision rule for fractures: Point tenderness over bone + mechanism consistent with fracture + inability to bear weight (LE) or use the limb (UE) = treat as fracture until proven otherwise by imaging. Do not attempt reduction or vigorous assessment — immobilize and refer.
Differential Assessment
| Condition | Key Distinguishing Feature |
|---|---|
| Severe Ligament Sprain | Tenderness over the ligament rather than the bone; stress testing reproduces pain and reveals joint laxity; imaging distinguishes from avulsion fracture |
| Bone Contusion (Bone Bruise) | Similar presentation to stress fracture; point tenderness over bone; no structural discontinuity on imaging; resolves faster than fracture |
| Compartment Syndrome | Pain out of proportion to visible injury; pain with passive stretch of compartment muscles; tense swelling; surgical emergency |
| Pathological Fracture (Tumor) | Fracture from minimal trauma; pain preceding the fracture; known cancer history or unexplained weight loss; urgent imaging and oncologic referral |
| Growth Plate Fracture (Salter-Harris) | Children/adolescents; tenderness at the growth plate rather than the bone shaft; imaging may be normal initially; orthopedic referral — growth disturbance risk |
CMTO Exam Relevance
- Know the fracture classification system (types, open vs. closed) and healing phases with timelines
- Percussion/vibration test and axial load test are key clinical tests
- Acute fractures locally contraindicate massage until stabilized
- Crepitus, visible deformity, and pain before tissue resistance on PROM (empty end-feel) are red flags
- Open fractures carry high infection risk (osteomyelitis)
- Post-immobilization rehabilitation addresses muscle atrophy, joint stiffness, and compensatory patterns
- Children heal faster (4–6 weeks) than adults (10–18 weeks)
- Pathological fracture from minimal trauma requires investigation for underlying cause
- Compartment syndrome is a surgical emergency requiring fasciotomy within 6 hours
Massage Therapy Considerations
- Primary therapeutic target: post-immobilization rehabilitation — addressing muscle atrophy, joint stiffness, periarticular adhesion, compensatory patterns, and scar tissue from the period of immobilization; during immobilization, systemic work and lymphatic techniques support the patient
- Sequencing logic: during immobilization — massage the rest of the body, focusing on compensatory patterns from altered gait/posture and lymphatic work to reduce edema distal to the immobilization; post-immobilization — warm periarticular tissue first (moist heat, effleurage), then address muscle atrophy and stiffness through progressive manual techniques, then restore joint mobility
- Safety / contraindications: acute fractures locally contraindicate massage until the bone is stabilized (reduction, casting, or surgical fixation); never massage over an unstable fracture; during immobilization — work proximal and distal to the cast/splint, not through it; monitor for complications (compartment syndrome — pain with passive stretch, tense swelling; CRPS — burning pain, allodynia, color changes); do not apply deep pressure over callus formation site for 3–4 months
- Heat/cold guidance: ice acutely for swelling management; warm moist heat post-immobilization to improve tissue pliability before mobilization work; avoid heat over metal hardware (plates, screws) — metal conducts heat
Treatment Plan Foundation
Clinical Goals
- Restore ROM at joints stiffened by immobilization
- Address muscle atrophy and weakness from disuse
- Reduce compensatory musculoskeletal patterns from altered gait/posture during immobilization
- Improve lymphatic drainage to reduce post-immobilization edema
Position
- Affected limb elevated and supported during treatment
- Position to allow access to both the immobilized limb area (post-cast) and compensatory areas
Session Sequence
- Compensatory musculoskeletal tension — the primary complaint during immobilization; contralateral limb overload, altered gait loading, trunk asymmetry
- Lymphatic techniques proximal to the immobilized area — reduce edema from casting and immobility
- Post-immobilization tissue warm-up — effleurage and gentle petrissage to atrophied muscles; moist heat application
- Joint mobility restoration — progressive PROM through available range; address capsular restriction identified by end-feel assessment; joint play mobilization if accessory motion is restricted
- Scar mobilization — if surgical fixation produced scars, begin cross-fiber technique once the wound is fully healed; address periosteal adhesions if present
- Progressive muscle activation — gentle resisted exercises to begin addressing atrophy; isometric initially, progressing to isotonic
- Reassess ROM and function — compare to pre-treatment and to the unaffected side
Adjunct Modalities
- Hydrotherapy: warm moist heat before mobilization; ice post-treatment if reactive swelling; contrast hydrotherapy for chronic periarticular stiffness; avoid heat over metal hardware
- Joint mobilization: Grade I–II for pain modulation at stiff joints; Grade III for capsular stretching post-immobilization; restore accessory motion before pursuing physiological ROM
- Remedial exercise (on-table): isometric contractions within the cast (if possible) to maintain muscle activation during immobilization; progressive active ROM and resisted exercise post-immobilization; proprioceptive retraining after lower extremity fractures
Exam Station Notes
- Demonstrate the percussion test technique — tap bone at a distance from the suspected fracture site
- Perform a neurovascular screen (distal pulses, sensation, color) for any acute injury presentation
- Verbalize that acute fractures are a local contraindication and systemic work is appropriate
- Show awareness of healing timelines and when direct work becomes safe
Verbal Notes
- During immobilization: "While your fracture heals, I can work on the rest of your body — especially the areas that are compensating for the injury. Your opposite leg/arm is working harder, and your back may be sore from altered movement patterns."
- Post-immobilization: "Now that the cast is off, your muscles will be weak and your joint will be stiff — that's completely normal after being immobilized. I'm going to work on gradually restoring your movement and muscle function. It may feel tight and a bit uncomfortable during stretching, but it shouldn't be painful."
Self-Care
- Gentle active ROM exercises for the affected joint immediately after cast removal — within pain-free range, performed frequently (every 2–3 hours) in small doses
- Isometric exercises within the cast during immobilization (if cleared by physician) to maintain some muscle activation
- Elevation of the affected limb to manage swelling
- Progressive strengthening exercises as directed by the physiotherapist — the MT supports but does not replace the rehabilitation program
Key Takeaways
- Fractures are classified by pattern and skin integrity; open fractures carry significant osteomyelitis risk
- Bone healing progresses through reactive (hematoma), reparative (soft then hard callus), and remodeling (compact bone) phases — healing times vary by age (4–6 weeks children, 10–18 weeks adults)
- Acute fractures are a local contraindication; systemic work and lymphatic techniques are appropriate during immobilization
- The percussion/vibration test confirms fracture by transmitting vibration through the bone from a remote site
- Post-immobilization rehabilitation addresses atrophy, stiffness, and compensatory patterns — this is the primary MT treatment phase
- Pathological fracture from minimal trauma requires investigation for underlying disease (osteoporosis, tumor)
- Compartment syndrome is a surgical emergency — pain with passive stretch and tense swelling require immediate referral