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RUSVM Small Animal Surgery 1 > Screws And Plates > Flashcards

Screws And Plates Flashcards

1
Q

What are the 3 applications of bone screws?

A

Lag screw -interfragmentary compression

Position screw

Plate screw

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2
Q

What are the types of bone screws?

A 
Cancellous 
Cortical 
Shaft 
Cannulated 
Locking head 
Self tapping
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3
Q

How is a lag scre palced?

A

Holes are drilled equidetant from fracture edges at a right angle to fracture plane

A smaller hole is drilled in far cortex (core diameter of screw)
A larger hole is drilled in near cortex (diameter of the screw threads)

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4
Q

What type of screws can be used for lag screw application?

A

Fully or partially threaded

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5
Q

What is the main purpose of lag screws ?

A

Interfragmentary compression

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6
Q

When is a position screw indicated?

A

When placement of a lag screw will cause fragment to collapse

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7
Q

How is a position screw placed?

A

Same diameter hold is drilled in near and far cortex, the drill hole is measured and tapped

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8
Q

T/F: bone plates resist all forces

A

True

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9
Q

What are the types of bone plates?

A

Dynamic compression plate DCP

Limited contact dynamic compression plate LC-DCP

Locking compression plate LCP

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10
Q

What type fo plate has deep notches between the holes that allows for contouring in an additional plane

A

Reconstruction plates

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11
Q

What type of plate can be cut to any length, is versatile, but relatively weak?

A

Veterinary cuttable plate

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12
Q

What type of plate provides compression to the acetabulum?

A

Acetabular plates

Can be contoured — referral procedure

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13
Q

What type of plate has limited contact with the bone, can contour in almost any direction and can be used for neutralization or bridging of fractures

A

String of pearls

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14
Q

A bone plate should always be placed on the ________ side of the bone

A

Tension

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15
Q

Bone plate should be placed on the ______ side of the femur

A

Lateral

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16
Q

Bone plate should be placed on the _____ side of the tibia

A

Medial

17
Q

Bone plate should be placed on the _______ side of the radius

A

Caudal

18
Q

Bone plates are placed on the ________ side of the proximal humerus, but on the _________ side in the distal humerus

A

Cranial/lateral; medial

19
Q

When plating a fracture, you should engage at least _____ corticosteroids on each side of the fracture line

A

6

20
Q

Screws for a bone plate should be at least ______mm from a fracture line

A

5

Also avoid plate holes over the fracture line
Avoid cordial defects

21
Q

T/F: dynamic compression plates can be used as a compression, neutralization or bridging plate

A

True

22
Q

Compression plates are applied using the _________________ principle to allow compression of a transverse fracture

A

Spherical gliding

— eccentrically loaded screw

23
Q

What type of plate is used in an oblique or comminuted fracture?

A

Neutralization plate

Reduced anatomically with lag screws or cerclage wires

Plate protects interfragmentary compression from rotation, bending, or shearing

24
Q

T/F: there is no load sharing when placing a bridging plate

A

True

Plate carries the entire load

25
Q

What type of plate could you use if you are concerned about blood supply to the fracture site, that would allow for improved cortical perfusion?

A

Limited contact dynamic compression plate (LC-DCP)

26
Q

What is minimally invasive plate osteosynthesis?

A

Placement of a plate epiperisoteally through keyhole incisions

Uses locking plate and screws
Fluoroscopy used

27
Q

What do you call the fixation method that uses a stainless steel nail placed within the medullary cavity that is locked into the bone by screws that cross the bone and pass through holes in the nail?

A

Interlocking nail

28
Q

T/F: interlocking nail placement can only be done normograde

A

True

29
Q

When can interlocking nail fixations be used?

A

For mid diaphyseal fractures of numerous, femur and tibia

NOT radius

RUSVM Small Animal Surgery 1 (39 decks)

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