Skull shape deformities in infants are common concerns for parents. The most prevalent of these deformities is known as plagiocephaly. Plagiocephaly manifests as flattening on the back or side of an infant's head and, if left untreated, can lead to aesthetic concerns as well as developmental issues. In this article, we will delve into the causes, symptoms, diagnostic processes, and effective modern treatment methods for plagiocephaly, with a particular focus on helmet therapy.

What is Plagiocephaly?

Plagiocephaly is derived from the Greek word 'plagiocephaly,' meaning 'oblique head.' It is the most common positional skull shape deformity in infants. It refers to a condition where one side of the skull is flatter or more depressed than the other. This typically results from continuous pressure on one side of the infant's head. Plagiocephaly develops because an infant's skull bones remain soft and flexible for a period after birth. If left untreated, it can also lead to asymmetry in the baby's facial structure.

Types of Skull Shape Deformities in Infants

While plagiocephaly is the most common, other skull shape deformities can occur in infants:

• Plagiocephaly: Flattening on one side of the skull.

• Brachycephaly: The skull is short in the front-to-back axis and wide in the side-to-side axis, making the head appear short and wide when viewed from above.

• Scaphocephaly: The skull is long and narrow, appearing elongated when viewed from the sides. This is often caused by premature fusion of the sagittal suture and may require surgical intervention.

• Combined Deformities: The presence of more than one deformity (e.g., plagiocephaly and brachycephaly).

What are the Causes of Plagiocephaly?

Multiple factors can contribute to the development of plagiocephaly in infants. These causes can generally be classified as positional or structural:

Positional Causes (Most Common Reason)

• Sleeping in the Same Position: Infants sleeping on their backs, especially if they consistently turn their heads in the same direction, can lead to flattening in that area.

• In-Utero Constraint: The baby being positioned in a specific way and becoming compressed within the uterus during pregnancy.

• Premature Birth: Premature infants' skulls are softer and thus more prone to shape deformities.

• Torticollis (Wry Neck): Shortening or tightness in the neck muscles that makes it difficult for the baby to turn their head in one direction, leading to them remaining in the same position.

• Low Stimulation Environment: Lack of sufficient stimulation to encourage the baby to turn their head.

• Infant Car Seats and Swings: Prolonged and constant use of these products.

Structural Causes (Less Common)

• Premature Fusion of Skull Sutures (Craniosynostosis): This condition prevents skull bones from growing properly, leading to abnormal shapes and usually requiring surgery. It should not be confused with plagiocephaly.

• Metabolic Bone Diseases: Certain rare genetic or metabolic disorders can also affect skull development.

What are the Symptoms of Plagiocephaly?

The most apparent symptom of plagiocephaly is a visible flattening on the back or side of the infant's head. Other symptoms may include:

• One side of the head appearing wider or flatter than the other.

• Asymmetry in the alignment of the ears.

• One side of the forehead being more prominent.

• The infant consistently favoring looking in one direction (especially if torticollis is present).

• Mild facial asymmetry (in advanced cases).

Direct Answer: Symptoms of plagiocephaly are typically noticed within the first few months after birth. Flattening on the back or side of the head, asymmetry in ear alignment, and the infant's tendency to always turn their head in the same direction are the most common signs.

Diagnosis Process

The diagnosis of skull shape deformities usually begins with a physical examination. The doctor carefully assesses the shape, symmetry, and bone structure of the infant's head. If necessary, especially if a structural abnormality is suspected, imaging techniques such as computed tomography (CT) or magnetic resonance imaging (MRI) may be used. However, for most positional plagiocephaly cases, these advanced imaging methods are not required.

Treatment Methods: Helmet Therapy and Other Options

The treatment for skull shape deformities in infants varies depending on the severity of the deformity, the baby's age, and its cause. The earlier treatment is initiated, the higher the chance of success.

1. Positional Changes and Exercises

For mild shape deformities, positional changes and specific exercises can be effective:

• Tummy Time: Placing the baby on their stomach while awake strengthens neck and shoulder muscles and reduces pressure on the back of the head.

• Changing Sleeping Position: Regularly changing the baby's sleeping position to different sides, allowing them to turn their head.

• Directing Stimuli: Placing toys or activities that attract the baby's attention towards the flattened side to encourage them to turn their head in that direction.

• Torticollis Treatment: If wry neck is present, physiotherapy and specific exercises are used to increase the flexibility of the neck muscles.

2. Cranial Orthosis (Helmet Therapy)

For moderate to severe cases of plagiocephaly, helmet therapy is one of the most effective methods. This treatment, also known as cranial orthosis, involves using a specially designed, lightweight, and breathable helmet. The helmets apply pressure to the flattened areas of the infant's skull, guiding bone growth in specific directions and helping the head achieve a more symmetrical shape.

How Does Helmet Therapy Work?

Hemlet therapy works on the principle of 'growth modification.' Infant skull bones are quite flexible during the first 1-2 years of life, and their growth rate is high. The helmet prevents growth in the flattened areas of the baby's head, allowing the faster-growing, uncompressed areas to shape the skull. The helmet applies controlled pressure to the empty spaces, helping to reshape the head.

Duration and Usage of Helmet Therapy

Hemlet therapy is typically worn for extended periods, such as 23 hours a day. The duration of treatment varies depending on the baby's age, the severity of the skull deformity, and the baby's growth rate, but it generally lasts for 4 to 6 months. The earlier treatment begins, the shorter the duration. The ideal treatment window is usually between 4-12 months, as this is when infants' skull growth rate is highest.

Advantages of Helmet Therapy

• High success rate (especially when started early).

• Non-surgical and safe method.

• Custom-designed for each individual.

• Infants generally adapt to the helmet quickly.

3. Surgical Methods

Surgical intervention may be necessary for certain structural skull shape deformities like scaphocephaly or in cases of craniosynostosis. Surgery involves opening prematurely fused sutures or reshaping skull bones. For positional plagiocephaly cases, surgery is generally not the first choice.

Optimal Timing for Helmet Therapy

The timing of initiating helmet therapy is critical for its success. The period of fastest skull growth, typically between 4 and 12 months of age, is when helmet therapy is most effective. During this time, the bones are still soft and flexible, allowing the helmet's shaping effect to be quicker and more pronounced. After 18 months, the skull growth rate slows down, which can reduce the effectiveness of helmet therapy.

Cost and Insurance Coverage of Helmet Therapy

Hemlet therapy can be costly due to its custom-made nature. The cost varies depending on the materials used, the helmet's design, and the treatment center's policies. In some countries, private health insurance or government-supported programs may cover part or all of this treatment under specific conditions. It is important to consult your doctor or treatment center for detailed information.

Post-Helmet Therapy Process

After completing helmet therapy, it is recommended to continue with positional precautions to maintain the achieved head shape. Your doctor will schedule follow-up appointments to monitor the baby's development. In rare cases, minor reshaping may occur after helmet therapy, but this is usually minimal.

Expert Opinion and E-E-A-T Principles

The information presented in this article is based on expert medical opinions, clinical studies, and current medical literature. In accordance with E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) principles, we aim to provide accurate and reliable information regarding skull shape deformities in infants and helmet therapy. At CranioWell, we strive to achieve the best results by offering personalized solutions tailored to each baby's individual needs.