Zone I
Area over distal phalanx and DIP joint
Complete laceration at this level will result in DIP joint flexed 40 degrees
"Mallet finger" refers to closed disruption of distal extensor apparatus
Occurs due to sudden forceful flexion of extended finger (finger gets "jammed")
May occur due to tear of<unk>  itself or avultion fracture of dorsal base of phalanx
Most common<unk>  injury in athletes
Immobilize DIP joint only in continuous slight hyperextension for 6-8wks
Zone II
Area over middle phalanx
Treatment is similar to zone I<unk> 
Zone III
Area over the PIP joint
Central<unk>  is most commonly injured structure
Controversial whether conservative or operative management is best
Closed<unk>  are initially treated with PIP joint immobilized in extension for 5-6wks
Must be followed closely by hand specialist
Zone IV
Involves area over proximal phalanx
Clinical findings are similar to zone III<unk> 
Zone V
Area over MCP joint
Open<unk>  to this area should be considered human bites until proven otherwise
If it is human bite performed delayed repair following course of antibiotic
Zone VI
Area over dorsum of hand<unk> s in this area are superficial; even minor-appearing lacs are associated with<unk><unk> 
Treatment typically requires operative fixation with K wires
Zone VII
Area over the wrist
Repair can be difficult because of presence of extensor retinaculum
Zone VIII
Area of the distal forearm<unk> s frequently retract into the forearm and must be retrieved and repaired
Lac <25%: does not require repair
Lac 25-50% requires simple suture repair
Lac >50% requires specialized repair
Area over distal phalanx and DIP joint
Complete laceration at this level will result in DIP joint flexed 40 degrees
"Mallet finger" refers to closed disruption of distal extensor apparatus
Occurs due to sudden forceful flexion of extended finger (finger gets "jammed")
May occur due to tear of<unk>  itself or avultion fracture of dorsal base of phalanx
Most common<unk>  injury in athletes
Immobilize DIP joint only in continuous slight hyperextension for 6-8wks
Occurs due to sudden forceful flexion of extended finger (finger gets "jammed")
May occur due to tear of<unk>  itself or avultion fracture of dorsal base of phalanx
Most common<unk>  injury in athletes
Area over middle phalanx
Treatment is similar to zone I<unk> 
Area over the PIP joint
Central<unk>  is most commonly injured structure
Controversial whether conservative or operative management is best
Closed<unk>  are initially treated with PIP joint immobilized in extension for 5-6wks
Must be followed closely by hand specialist
Closed<unk>  are initially treated with PIP joint immobilized in extension for 5-6wks
Must be followed closely by hand specialist
Involves area over proximal phalanx
Clinical findings are similar to zone III<unk> 
Area over MCP joint
Open<unk>  to this area should be considered human bites until proven otherwise
If it is human bite performed delayed repair following course of antibiotic
If it is human bite performed delayed repair following course of antibiotic
Area over dorsum of hand<unk> s in this area are superficial; even minor-appearing lacs are associated with<unk><unk> 
Treatment typically requires operative fixation with K wires
Area over the wrist
Repair can be difficult because of presence of extensor retinaculum
Area of the distal forearm<unk> s frequently retract into the forearm and must be retrieved and repaired
Lac <25%: does not require repair
Lac 25-50% requires simple suture repair
Lac >50% requires specialized repair
Hand and finger tendon injuries
Distal finger
Hand deep space infection
Finger amputation
Hand and finger dislocations
Fingertip laceration
Hand and finger infections
Nail avulsion