Bone Screws plates and nails (Betance 3) Flashcards Preview

6th MELEAH Sur-Gur-RAYYY final lezzzz ace dis shit > Bone Screws plates and nails (Betance 3) > Flashcards

Flashcards in Bone Screws plates and nails (Betance 3) Deck (68):
1

State the type of screw:

Fracture repair utilizing interfragmentary compression

Lag screw

2

State the type of screw:

Stabilizing a bone fragment without compression

Position screw

3

State the type of screw:

Fixing a splinting device to a bone (plate/nail)

Plate screw

4

State the screw that has a larger pitch and deeper thread used in these 2 areas of bone: _____ and ______. Cane be partial or fully threaded

Cancellous screw

metaphyseal or epiphyseal bone

5

State the screw that is FULLY threaded with a smaller pitch and shallow threads used in this area of bone: _____

Cortical screw

diaphyseal

6

What screw us used for lag application in diaphyseal bone and what category of screw it is?

Shaft screw

(category: partially threaded cortical screw)

7

Shaft screws avoid threads engaging this?

cis cortex

8

A _______ screw has a central _____ core and used in more difficult fractures.

___wire holds reduced fracture and acts a guide (screws placed over the wire)

Cannulated; hollow

K

9

What screw is used in locking compression plates? The screw head locks into a _____ _____

Locking head screw; plate hole

10

What do locking bone screws do better than non locking screws?

Provide better anchorage

11

This type of screw allows screw placement without pre drilling and tapping

Self tapping screw

12

This type of screw provides interfragmentary compression; where should the hole be drilled

Lag screw


equidistant from the fracture edges

13

For Lag screws, where should the hole be drilled in condylar fractures?

at a right angle to the fracture plane

14

Lag screw applic.:

A _____ hole is drilled in the FAR cortex corresponding to the ____ diameter of the screw

smaller hole; core diameter

15

Lag screw applic.:

A _____ hole is drilled in the NEAR cortex corresponding to the ____ diameter of the screw

larger hole; outer diameter

16

For lag screw application:

_____ or a _____ is used to increase contact between the bone and the screw head

countersinking; washer

17

What screw is used when placement of a lag screw will cause the bone fragment to collapse

position screw

18

For a position screw:

The ____ diameter hole is drilled in the near and far cortex


The drill hole is measured and tapped

The screw is misplaced and the position of the 2 fragments is _____

same



maintained

19

Rigid stainless steel or titanium strips that are fixed to the bone with bone screws.

Resist ____ forces

Bone plates; resist all forces

20

This plate is not as strong as a Dynamic compression plate (DCP) and has deep notches between the holes, allows contouring in an ____ ____

Reconstruction plate

additional plane

21

Reconstruction plates are used in areas that require ____ plate contouring such as the _____ or ____

complex; mandible or pelvis

22

What plates are weak, can be stacked, and provide NO COMPRESSION

These are versatile and cut to any length

Veterinary Cuttable Plates

23

These plates are used in referral procedures, can be contoured, and provide _____ at the acetabulum

Acetabular Plates

compression

24

This apparatus DOES NOT COMPRESS, provides limited contact, and is considered a locking plate

String of Pearls

25

The String of Pearls contours in ____ direction making it versatile and ____ screws are acceptable. Often combined with a ____

any; unicortical; rod

26

In terms of Bone plate placement; we place it on the ____ side of the bone because plates are likely to fail on the _____ side

tension; likely to fail on compression side

27

Bone plates convert _____ (_____) forces into _____ forced with _____ bearing

distracting (tension) forces into compression forced with weight bearing

28

State the side of the bone you place the bone plate on

-Femur
-Tibia
-Humerus
-Radial

-Femur (lateral)
-Tibia (medial)
-Humerus (cranial, lateral, medial, caudal)
-Radial (cranial)

29

Sometimes you need to use a ___ plate where you use the original shape and curvature of the bone (prior to sx using rads or during sx with a bending template)

cointour

30

Principles of bone plating:

Span the _____ of the bone is possible

Engage at least ___ cortices on each side of the fracture line

Screws at least ___ mm from fracture line

Do not place screws in ____ ____ unless a ___/___ screw

Fill ____ screw holes if possible, avoid plate holes over ____ _____

Avoid cortical____ and use ____ ____ if necessary

diaphysis

6

5mm

fracture line unless lag/position screw

ALL; fracture lines

defects; bone grafts if necessary

31

What type of plate can be instituted when the same plate can be used as compression, neutralization,and bridge plating

Dynamic Compression Plate (DCP)

32

This type of plate is used on transverse or nearly transverse fractues

Compression plate

33

What's unique about the fracture site with compression plates in terms of what it allows?

What must take place before the plate is applied

Allows compression at the fracture site!

plate must be shaped to the bone

34

How is compression applied with a Compression plate?

Spherical gliding principle

35

With usage of a Compression plate, compression occurs when using this type of screw?

eccentric loaded screw

36

What happens to the compression plate before it is applied and why is this done?

it's prestressed 1-2 mm at the fracture line to allow compression of the opposite cortex

37

Neutralization plates are used on _____ or _____ fractures and applied via a ____ ____ ____

oblique or comminuted


neutral drill guide

38

How are Neutralization plates anatomically reduced?

with use of lag screws or cerclage wires

39

Neutralization plates protects the _____ compression achieved by the lag screw from ____, bending, or _____ forces

Neutralization plates protects the (interfragmentary) compression achieved by the lag screw from (rotation), bending, or (shearing) forces

40

Bridging plates bridge _____ fractures?

diaphyseal

41

For bridging plates:

The plate is secured to proximal and distal fracture fragments and spans the ____ part of the fracture

comminuted

42

Bridging plates act as a _____ to maintain ____ and alignment of the bone

splint; length

43

Bridging plate prevents _____ _____ as a result of shear or bending forces

axial deformity

44

Does the bridging plate share load sharing?

NO load sharing; it carries the entire load

(duhh think of a bridge carrying the load of every car and the contents/people inside of it...nothing helps it share the load)

45

Bridging plates:

often incorporates ____ ____ and commonly used as a ____-___ combo

bone grafts; plate-rod

46

Limited contact dynamic compression plate does what to plate to bone contact??

What does it improve?

decreases

improves cortical perfusion

47

Limited contact dynamic compression plate improves _____ _____?

cortical perfusion

48

Limited contact dynamic compression plates reduces stress concentration at the ____ _____(state the location)

screw holes

49

(state the missing forces for the fill in the blank)

Limited contact dynamic compression plate can be used for ______, neutralization, or _____functions

compression; bridging

50

Locking compression plate is also termed _____ _____

internal fixator

51

Locking compression plate eliminates the need for this?

eliminates need for perfect contouring

52

Locking compression plate ____ contact between _____ and bone

limits; implant

53

Locking compression plate has _____threads thus a ____ core diameter

smaller threads thus a larger core diameter

54

What type of compression plate has a tapered tip for MIPO

Locking compression plate

55

MIPO stands for?

Minimally invasive plate osteosynthesis

56

Minimally invasive plate osteosynthesis does not require this?

plate to bone friction

57

Minimally invasive plate osteosynthesis uses ____ plates and _____ along with fluoroscopy

locking plates and screws

58

What type of incision do you make with Minimally invasive plate osteosynthesis

keyhole

59

Minimally invasive plate osteosynthesis uses _______ plate insertion

epiperiosteal

60

Interlocking nail is a stainless steel nail placed within the ______ cavity and is LOCKED to the bone by screws that CROSS THE BONE and pass through holes in the nail

medullary

61

Standard interlocking nails have ___ holes distal and ___ holes proximal

2 (for both)


62

Interlocking nails have a _____ point on one end and 2 ____ with _____ threads on the other end

trochar point

2 flanges with internal threads

63

In terms of equipment for interlocking nail:

A _____ is required that matches the size of the ____ which opens the medullary cavity without _____ the cortex.

An _____ piece is attached to the end of the nail to allow the nail to be _____ completely within the medullary cavity

REAMER; nail; damaging


extension; advanced

64

In terms of equipment for interlocking nail:

A _____ tool that attaches to the extension device to drive the nail into the bone.

A ___ ____ with drill holes that align with the holes in the nail.

A ____ ____ ____ that protects the soft tissue

insertion

drill jig

drill guide sleeve (protects ST)

65

What type of fractures are interlocking nails used for?

mid diaphyseal fractures of the humerus, femur, and tibia

66

Interlocking nails MUST be placed ______

normograde

67

Interlocking nails resist bending, _____, and _____ forces

shearing; rotational

68

Interlocking nails can be applied ____ and are often used in _______ mode with little disturbance to fracture site

closed; bridging