Ulna collateral ligament
Definition
Injury to ulnar collateral ligament of thumb MCPJ
Interferes with pinch grip and grasp and thumb is ineffective as a post
Injury to ulnar collateral ligament of thumb MCPJ
Interferes with pinch grip and grasp and thumb is ineffective as a post
Athletes with increase activity / distance
Women with eating disorders / amenorrhea
Compression / inferior neck
- < 50% protective weight bear
- > 50% emergent ORIF
Tension side / superior neck
- emergent ORIF
Middle age men
Steroids / Growth Hormone
Usually occurs in gym
Bench Press
Significant bruising in the acute phase
In chronic setting, ask patient to adduct against hip / resistance
Ranges
- up to 4%
Focal pain
- typically anterolateral thigh
- often tender
- corresponds to tip of stem
1. Instability
Types
- early
- late / failed bony ingrowth
Cause
- micromotion at distal stem
Uncommon
- dancers
- athletes
Hyperdorsiflexion of the MTPJ
MT head dislocates plantar
- may buttonhole through capsule
- can prevent closed reduction
1. Sesamoids
2. Conjoint tendon
3. Intersesamoid Ligament
Chronic, non metabolic bone disorder
Characterised by increased bone resorption, bone formation and remodelling
Rare < 40
1 – 3 % population over 60
M > F
Unknown
Paramyxovirus implicated
- measles
- RSV
- canine distemper virus
Electron Microscope
Radius rotates externally in relation to the ulna
- posterior displacement of the radial head relative to the capitellum
- in flexion
Throwing injury
- seen in the throwing athlete
- repetitive microtrauma / valgus stress
- develop laxity
Initially
- lose velocity / accuracy
Develop medial pain
40% ulna nerve symptoms
A fixed equinus deformity of the forefoot in relation to the hindfoot
- resulting in an abnormally high arch that fails to flatten with weight bearing
- deformity may be forefoot, hindfoot or combination
Intrinsic
- inflammatory
- degenerative
Extrinsic
- traumatic
- spur
F > 40
Associations 60% of cases
- hypertension
- diabetes
- obese
- trauma
- prior surgery
- steroids