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Scaphoid Fractures Essentials
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Scaphoid Fractures Essentials
Scaphoid Fractures Essentials
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1
Question
What is the most common carpal bone fracture?
Page 1
Answer
Scaphoid fracture (75% of cases)
2
Question
Which population is most affected by scaphoid fractures?
Page 1
Answer
Adults, especially young males
3
Question
Why might scaphoid fractures often go undiagnosed?
Page 1
Answer
Subtle clinical signs and inadequate imaging
4
Question
What is the primary treatment approach for most scaphoid fractures?
Page 1
Answer
Surgical intervention
5
Question
What are the two major complications of scaphoid fractures?
Page 1
Answer
Nonunion (pseudarthrosis) and avascular necrosis of proximal fragment
6
Question
How do scaphoid fractures affect wrist mechanics?
Page 1
Answer
As intra-articular fractures with ligament damage, altering carpal dynamics
7
Question
What is the key principle for diagnosing scaphoid fractures?
Page 1
Answer
Presume scaphoid fracture in any closed wrist trauma until proven otherwise
8
Question
What is the shape and orientation of the scaphoid bone?
Page 2
Answer
Elongated boat-like, oblique axis downward, outward, and forward
9
Question
Where is the scaphoid positioned in the wrist?
Page 2
Answer
Intercalated short bone between radial fossa and trapezium-trapezoid base, spanning both carpal rows under distal radius
10
Question
What are the three main parts of the scaphoid?
Page 2
Answer
Proximal pole (head/body), waist, distal part (tubercle)
11
Question
What covers most of the scaphoid's surface?
Page 2
Answer
Cartilage
12
Question
What is the only muscular insertion on the scaphoid?
Page 2
Answer
Abductor pollicis brevis at the tubercle
13
Question
What carpal column does the scaphoid belong to?
Page 2
Answer
External mobile column
14
Question
What is the vascularization type of the scaphoid according to Gelberman?
Page 3
Answer
Type 1: single main retrograde dorsal pedicle
15
Question
What provides the extrinsic vascularization to the scaphoid?
Page 3
Answer
Branches from the radial artery in two groups
16
Question
What does the proximal vascular group supply to the scaphoid?
Page 3
Answer
80% of blood flow, irrigating the proximal two-thirds via dorsal approach at waist
17
Question
What does the distal vascular group supply to the scaphoid?
Page 3
Answer
20% of blood flow to the tubercle via palmar approach
18
Question
Why is there no intraosseous anastomosis in scaphoid vascular networks?
Page 3
Answer
Separate proximal and distal supply systems
19
Question
What are the main wrist movements?
Page 3
Answer
Flexion-dorsiflexion (FD), flexion-palmar (FP), radial inclination (IR), cubital inclination (IC)
20
Question
Which age group is most exposed to scaphoid fractures?
Page 3
Answer
Young subjects
21
Question
What is the gender predominance in scaphoid fractures?
Page 4
Answer
Male
22
Question
What is the most common mechanism of scaphoid fracture?
Page 4
Answer
Indirect: fall on palm with wrist in pronation, hyperextension, and radial inclination
23
Question
What is a rare mechanism for scaphoid fracture?
Page 4
Answer
Direct impact
24
Question
In what carpal injury can scaphoid fracture occur?
Page 4
Answer
Trans-scaphoid-lunate dislocation
25
Question
What are the three types in Trojan's classification of scaphoid fractures by location?
Page 4
Answer
Proximal (20%), waist (70%), distal (10%)
26
Question
What is Type I in Schernberg's classification?
Page 4
Answer
Polar fractures
27
Question
What is Type II in Schernberg's classification?
Page 4
Answer
High body fractures
28
Question
What is Type III in Schernberg's classification?
Page 4
Answer
Low body fractures
29
Question
What is Type IV in Schernberg's classification?
Page 4
Answer
Trans-tubercular fractures
30
Question
What is Type V in Schernberg's classification?
Page 4
Answer
Foot fractures