Authors of section

Authors

Jonas Andermahr, Michael McKee, Diane Nam

Executive Editor

Joseph Schatzker

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ORIF - Plate fixation

1. Introduction

Principle

In this procedure it is important to anatomically reconstruct the joint surface, and thereby convert the complete articular fracture type to an extra-articular fracture type.

The joint block is then reduced to the scapular body.

One must restore the correct anatomical angle between the glenoid fossa and the scapular body.

Principle

Plate selection

The standard plate for this fixation is the 2.7 or a 3.5 reconstruction plate.

Plate selection

2. Patient preparation

This procedure may be performed with the patient in either a prone position or lateral decubitus position.

3. Approach

Plating of the glenoid neck and scapula are performed through a posterior approach.

Principle

In a complete articular fracture with an anterior fragment a posterior arthrotomy is necessary to reduce the fragment. Its fixation is achieved with a lag screw inserted posteriorly.

orif plate fixation

4. Restoration of articular surface

Reduction of the joint surface using K-wires

Reduction of the articular surface may be facilitated by the insertion of a K-wire to be used as joystick. The use of a cannulated system is preferred. Therefore, insert the K-wire for the potential cannulated screw in the planned lag screw trajectory.

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When reduction of the articular surface is completed, insert the K-wire further to temporarily fix the articular fracture.

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Alternatively, a repositioning clamp can be used to reduce the fragments of the glenoid fossa.

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If possible, the fracture of the glenoid fossa should be fixed with a lag screw(s).

Once the articular fracture is fixed, proceed with the fixation of the neck as for simple extra articular fractures.

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5. Reduction and fixation of the glenoid neck using reconstruction plate

The articular segment is now fixed. Once the neck fracture is reduced, it is best to use cortical screws for fixation of the plate into the articular segment to bypass the inserted lag screw.

One or two K-wires are partially inserted in the articular block and used as a joystick for reduction.

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The joint block is reduced to restore the anatomical angle of the glenoid fossa. Large deviations of the angle (>20 °) will reduce the functional outcome.

If the reduction is not successful, an alternative procedure where the plate is used as a reduction aid can be employed (see below)

K-wires are inserted for temporary fixation. Care should be taken that the position of the K-wires does not interfere with the planned position of plate and screws.

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Plate fixation

The reconstruction plate is shaped to a near perfect anatomical fit.

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At least two screws are necessary for sufficient fixation of the glenoid joint block.

Ideally, three bicortical screws are inserted in the lateral scapular border. If the bone stock is poor, locking screws are indicated.

orif plate fixation

6. Alternative reduction and fixation using an angle stable plate

It is best to use a reconstruction plate designed to take angularly stable screws.

The plate is bent at the right spot to subtend the usual angle between the glenoid and the lateral border of the scapula (130 - 135 degrees).

Up to 10 degrees deviation from the anatomically correct angle can be tolerated.

When angularly stable fixation is used the plate does not have to fit the bone, but must fit the overall contour.

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The plate is fixed to the glenoid segment with two bicortical screws.

If locking screws are used, care must be taken regarding their direction so that they do not enter the joint.

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In a transverse fracture of the glenoid where lag screw fixation is physically not possible, maintain reduction and compression of the fracture with a clamp, then reduce the neck fracture.

The reduction and compression of the articular fracture is then maintained by the fixation of the plate to the articular segment.

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The plate is then used as a reduction aid.

A trasglenoid X-ray is recorded to verify whether the anatomical angle is achieved.

Large deviations of the angle (>20°) will reduce the functional outcome.

When the correct reduction and the correct angle between the glenoid fossa and the lateral border of the scapula have been achieved, screws are inserted along the lateral border of the scapula.

glenoid fossa complete articular articular simple neck simple

Correct reduction and fixation is verified by image intensification.

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7. Aftercare

Introduction

For postoperative treatment of surgically operated scapular fractures and nonoperative treatment of fractures of the scapula which are treated conservatively is basically the same.

The decision to operate or not to operate is made on the basis on the fracture type, the degree of fragment displacement and the intrinsic fracture stability. The stability of a fracture can be further determined with the aid of an image intensifier.

Phase I: Day one

It is important to maintain full mobility of the unaffected joints to reduce arm swelling and to preserve joint motion. The following exercises are recommended.

  • Straightening and flexion of the elbow


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  • Open and closure of the hand
  • Squeezing of a soft ball


Aftercare/Nonoperative Scapula

  • Bending of the wrist forward, backwards and in a circular motion.
  • Movement of an open hand from side to side.


nonoperative treatment

  • Squeezing the shoulder blades together, while shoulders remain relaxed


Aftercare/Nonoperative Scapula

Phase II: Two to six weeks

Pendular exercises can be started when pain starts to subside after the first few days.


nonoperative treatment

One progresses gradually from passive to assisted active range of motion exercises making sure that assisted active abduction is done without elevation of the shoulder.


Aftercare/Nonoperative Scapula

Active assisted range of motion exercises are started with:

  • External rotation
  • Internal rotation
  • Forward flexion with the arms on the table
  • Forward flexion and elevation of the arm with a ball on the wall


Aftercare/Nonoperative Scapula

Sub-maximal isometric exercises with:

  • Internal rotation
  • External rotation
  • Abduction
  • Extension

Note: Timing and progression of exercises is ultimately directed and determined by the operating surgeon since such factors as bone quality, type of fracture and fixation may vary from case to case.


Aftercare/Nonoperative Scapula

Sling and swath

Optimal shoulder immobilization is achieved when the upper arm and forearm are secured to the chest. Traditionally, this has been done with a sling that supports the elbow and forearm and counteracts the weight of the arm. The simplest sling is a triangular bandage tied behind the neck.

Additional support is provided by a swath which wraps around the humerus and the chest to restrict further shoulder motion, and keep the arm securely in the sling.
Commercially available devices provide similar immobilization, with or without the circumferential support of a swath.


glenoid fossa extraarticular simple

Shoulder immobilization

Sling and swath (A), shoulder immobilizer (B), Gilchrist bandage (C), and other such devices all provide essentially similar support for the shoulder joint.


Activities of daily living

Sleeping
The patient should sleep wearing the sling and lie either on his back or on the non-injured side.

When sleeping on the back, the injured side should be supported by placing a pillow underneath the arm and shoulder.

Some patients may find it more comfortable to sleep in a sitting or semi reclined position.


Sleeping

When sleeping on the side, a pillow can be placed across the chest to support the injured side.


Sleeping

Hygiene

A non-slip mat in the shower/bath tub will improve safety. The arm can hang gently at the patient's side while showering. Axillary hygiene is important. If assistance is not available, a long-handled sponge can be used to wash the back and legs.


Hygiene

Dressing

Loose fitting clothing and button-up shirts are ideal. The unaffected arm may be used for buttoning and unbuttoning. The affected arm is dressed first, then the non-affected arm. When undressing, start with the non-affected arm, then the affected arm.


Dressing

Shoulder abduction cushion

In the case of coracoid fractures or acromial fractures and rotator cuff surgery, one attempts to relieve tension by elevation and abduction of the extremity. This can be achieved with the aid of a so-called airplane splint or an abduction cushion as shown in this diagram.


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Mobilization: 2-3 weeks posttrauma

Nonoperative management of scapular fractures usually begins with maximal support - a sling and swath equivalent worn continuously. If the patient finds lying down uncomfortable, then a sitting position may be preferred for sleeping.

A patient who is very comfortable, at the beginning of treatment or after some recovery, may need less immobilization, and even begin gentle use of the injured arm.

The degree of required immobilization and the rate progression may be speeded up as comfort permits.


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When pain permits, begin with pendulum exercises (as illustrated).


nonoperative treatment

At the same time active hand and forearm use should also be encouraged.


Aftercare/Nonoperative Scapula

Isometric exercises can begin as soon as tolerated for the shoulder girdle including scapular stabilizers, and the upper extremity.
X-rays should be checked to rule out secondary fracture displacement.


Aftercare/Nonoperative Scapula

Active assisted exercises: 3-6 weeks postoperative

As comfort and mobility permit, and fracture consolidation is likely, the patient should begin active assisted motion. Physical therapy instructions and/or supervision are provided as desired and available.

If passive range of motion exercises are progressing satisfactory, one can then cautiously progress to active assisted.

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Shoulder therapy set: 3-6 weeks postoperative

A “shoulder therapy set” might be helpful. Typically included devices are:

  • An exercise bar, which lets the patient use the uninjured left shoulder to passively move the affected right side.
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  • A rope and pulley assembly. With the pulley placed above the patient, the unaffected left arm can be used to provide full passive forward flexion of the injured right shoulder.

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Strengthening: from week 6 on

As passive motion improves, and active assisted exercises progress satisfactory, and the fracture becomes fully consolidated one can begin strengthening. First one strengthens by active motion against gravity. To increase muscle strength, one must increase the resistance against which the muscles are working. Endurance training follows.

Beware of premature forward flexion which is done passively but puts a significant strain on the supraspinatus and its repaired tendon.

Elastic devices are useful in providing varying degrees of resistance. Ultimately the athletic patient can progress to resistance machines and free weights.

Physical therapy instruction and supervision may be helpful for optimal rehabilitation or if the patient is not progressing satisfactorily.
Remember to monitor rotator cuff strength. Significant weakness may indicate an unidentified rotator tendon cuff rupture which is in need of surgical repair.


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Pitfall: shoulder stiffness

To reduce the risk of stiffness, immobilization should be discarded as soon as possible. This can be done progressively, beginning with elimination of the swath (circumferential bandage) during the daytime and encouraging pendulum exercises.
The sling may be used on a part-time basis as soon as appropriate.
If formal physical therapy has not been prescribed, it should be considered for any patient whose range of motion is not improving as expected.

nonoperative treatment