Classification of acromion types
What are the 3 types of acromion?
Three acromion types have been described: flat, curved, and hooked.
What is a Type 4 acromion?
The three types of acromial processes previously described in the literature include type 1, in which the undersurface is straight, and types 2 and 3, in which the undersurface is concave. In this report, a fourth type of acromion is described in which the undersurface is convex near its distal end.
What is Type 3 acromion process?
The type I acromion, which is flat, is the “normal” acromion. The type II acromion is more curved and downward dipping, and the type III acromion is hooked and downward dipping, obstructing the outlet for the supraspinatus tendon.
What is Type 2 acromion mean?
• A type II acromion is considered to be one that in which the acromion has a down-sloping character. • A type III acromion is considered to be present when there is significant downward hooking of the acromion consequently greatly restricting the caliber of the subacromial arch area.
What does Type 1 acromion mean?
Acromial type
Bigliani et al5 classified the shape of the acromion on supraspinatus outlet (or lateral) radiographs into three distinct types: type I represents a flat, type II a curved and type III a hooked undersurface of the acromion (Fig.
How common is Type 2 acromion?
In acromion, type I (flat shape) and type II (curved shape) are the most common types accounting for 47.26% and 49.66%. But type III (hooked shape) only represents 3.08% (Figure 3). Three types of acromions according to Bigliani et al.
How do you heal acromion?
The highest point of the shoulder blade is called the acromion.
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Treatment may include:
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Treatment may include:
- Rest. This allows your shoulder to heal. …
- Sling. …
- Cold packs. …
- Prescription or over-the-counter pain medicines. …
- Arm and shoulder exercises.
What is the acromion in the shoulder?
Acromion. The roof (highest point) of the shoulder that is formed by a part of the scapula. Tendons. The tough cords of tissue that connect muscles to bones.
What causes acromion pain?
Shoulder Injuries
Injuries are one of the most prevalent causes of acromion pain. When you fall, either onto your shoulder or an outstretched arm, you risk spraining the ligaments that connect your acromion to the other bones in your shoulder, including the coracoclavicular ligaments.
What does the acromion do?
The acromion process extends from the spine of the scapula towards the front of the body. It functions to stabilize the shoulder joint and is attached by ligaments to the clavicle and coracoid process of the scapula. The deltoid muscle also attaches to the acromion process, which allows a person to abduct their arms.
Which structure is the acromion?
The acromion is the prominence of the scapula that meets the end of the clavicle to form the acromioclavicular joint. This joint can look a little different in everyone because different types of acromion exist.
What is acromion morphology?
Acromial morphology is one of the important factors related to rotator cuff pathology, especially if there is acromial encroachment onto the supraspinatus tendon. This is the rationale for many surgeons performing an acromioplasty, based on preoperative radiographs, in their treatment of rotator cuff disease.
What is a curved acromion?
The acromion is the uppermost part of the scapula (shoulder blade). An acromion may be flat, curved, or hooked. Prominent coracoid. The coracoid is a small projection from the shoulder blade. Like people who have hooked or curved acromions, some people have prominent coracoids.
What type of bone is the acromion?
Together with the coracoid process it extends laterally over the shoulder joint. The acromion is a continuation of the scapular spine, and hooks over anteriorly. It articulates with the clavicle (collar bone) to form the acromioclavicular joint.
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| Acromion | |
|---|---|
| TA2 | 1152 |
| FMA | 23260 |
| Anatomical terms of bone | |
What are the 4 shoulder tendons?
Tendons are the reason a muscle can move the bones in our body when muscles contract. The tendons involved in the shoulder mainly include the long head of the biceps tendon and the tendons of the rotator cuff: supraspinatus, infraspinatus, teres minor and subscapularis.
What are the 4 main ligaments of the shoulder?
Ligaments in the shoulder are essential for a healthy shoulder.
- Glenohumeral Ligaments.
- Coraco-acromial Ligament.
- Coraco-clavicular Ligaments.
- Transverse Humeral Ligament.
Is acromion a short bone?
The acromion is a large, flat bony anatomical structure that arises from the lateral end of the spine of the scapula and projects anteriorly to articulate with the lateral end of the clavicle. In the adult, it measures ∼2.5 cm in width and is roughly 5 cm long.
What type of joint is the acromioclavicular joint?
The AC joint is a plane type synovial joint, which under normal physiological conditions allows only gliding movement. As it attaches the scapula to the thorax, it allows an additional range of motion to the scapula and assists in arm movement such as shoulder abduction and flexion.
What type of joint is the shoulder joint?
ball-and-socket joint
The glenohumeral joint is structurally a ball-and-socket joint and functionally is considered a diarthrodial, multiaxial, joint. [1] The glenohumeral articulation involves the humeral head with the glenoid cavity of the scapula, and it represents the major articulation of the shoulder girdle.
What is a Downsloping acromion?
A downsloping lateral acromion is a variation in acromion shape where the lateral margin of acromion extends to project inferiorly.
What is top of shoulder called?
The acromioclavicular joint is located where the clavicle (collarbone) glides along the acromion, located at the top of the shoulder blade.