Nasolabial folds, smile lines

Understanding Nasolabial Folds

Anatomical Structure: Nasolabial folds, commonly known as smile lines, are the diagonal creases that run from the sides of the nose down to the corners of the mouth. Anatomically, these folds are more than just surface-level wrinkles; they are structural boundaries created by fibrous bands. These bands act as a distinct anatomical divider between the structures of the cheek and the area surrounding the mouth.

Addressing Deepening Folds: When these folds become more pronounced or appear deeper, it is the result of various complex physiological changes. Identifying the specific underlying causes is essential for medical professionals when designing a targeted treatment plan—such as the Face-Lock™ facelift procedure—to ensure the highest level of efficacy and precision.

Understanding Deep Nasolabial Folds

The Role of Fat Displacement: It is a common misconception that deep smile lines are purely a skin-related issue. In reality, they are often caused by changes in the subcutaneous fat of the cheeks.

Whether due to an excess of fatty tissue, the natural aging process, or rapid weight loss, the fat in the cheek area begins to sag. Because strong fibrous bands act as a barrier, they prevent this fat from sliding further down toward the lips. This causes the tissue to "bunch up" or fold over, creating a prominent ridge that makes the nasolabial folds appear significantly deeper than before.

Determining the Right Treatment: The approach to correction depends entirely on the severity of the sagging. For mild cases, non-invasive lifting technologies can help reposition the tissue. However, for more severe laxity, a surgical solution—such as the Face-Lock™ facelift procedure utilizing our specialized Lock System—provides much more visible and targeted results. Effective treatment begins not by simply looking at surface-level wrinkles, but by evaluating the volume and sagging of the underlying facial structures.

What Causes Nasolabial Folds?

The deepening of these lines is rarely the result of a single factor; rather, it is the combined outcome of various physiological and anatomical mechanisms. Correctly identifying these underlying causes is the key to selecting a treatment that addresses the root of the problem. Generally, these causes can be categorized into the following three types:

1. Changes in Facial Fat

This mechanism is directly related to the volume of the malar fat pad (cheek fat) and the overall firmness of the skin. When there is an excess of fat or the skin becomes lax, these tissues naturally descend due to gravity. However, this downward movement is restricted by internal fibrous bands, causing the fat to "pile up" above these anatomical barriers. This creates a shadow effect that makes the nasolabial folds appear significantly deeper and more defined.

Excessive facial fat: In cases of weight gain or obesity, the accumulation of fat in the cheek area increases the gravitational pull on the mid-face, making the folds much more prominent.
Rapid weight loss: This leads to a sudden decrease in the fat volume that supports the skin. While the fat volume is reduced, the skin remains stretched, resulting in noticeable and immediate sagging.
Age-related skin laxity: The natural loss of skin elasticity over time causes the overall facial structure to lose its support and sag downward.

2. Mid-face Bone Resorption

As we age, particularly from the age of 30 onwards, the underlying skeletal structure of the face begins to undergo significant changes. The bone surrounding the nasal base, known as the piriform aperture, gradually erodes and atrophies. This process leads to the collapse of the deepest supportive structures in the mid-face. Consequently, the overlying skin and fat layers lose their firm foundation, resulting in a visible sagging and a deepening of the nasolabial folds.

3. Degradation of Collagen and Elastin

Beyond deep structural changes, the deterioration of the outer skin layers is a primary cause of visible lines. Various external factors act as catalysts that break down the skin's essential structural proteins:

Sunlight: Ultraviolet (UV) radiation is a leading factor in the destruction of collagen and elastin, the two proteins responsible for maintaining skin strength and elasticity.
Smoking: The chemicals found in tobacco smoke are well known to accelerate the aging of skin cells and directly damage the underlying collagen framework.

Once these various causes are understood, the next step is a professional evaluation to determine the most appropriate treatment path for each specific mechanism to achieve the best possible results.

How to Correct Nasolabial Folds

Targeted Treatment: The core principle of managing nasolabial folds effectively is addressing the specific root cause. Because no single method can resolve every underlying issue, medical techniques must be selected based on the specific physiological mechanism present in each patient. Whether utilizing the Face-Lock™ facelift procedure or other advanced interventions, the choice depends on the patient's unique diagnostic profile. In this section, we evaluate and compare the efficacy of various treatment methods by matching them with the specific causes previously analyzed, as shown in the table below.

Comparison of Treatment Approaches

Primary Cause	Treatment Options	Mechanism & Indications
Tissue Laxity & Excess Fat Volume	1. Lifting Devices 2. Face-Lock™ facelift procedure	Lifting devices: These are ideal for mild to moderate cases. They utilize energy-based technologies, such as High-Intensity Focused Ultrasound (HIFU) or Radiofrequency (RF), to stimulate tissue contraction and reorganize the structure of the skin and underlying fat. Facelift surgery: Specifically the Face-Lock™ facelift procedure, this is recommended for severe laxity. It provides direct structural correction by tightening sagging tissues and returning them to their original anatomical position, resulting in a significantly smoother appearance.
Bone Resorption	1. Dermal Fillers 2. Fat Grafting	Volume replacement: These treatments act as a structural substitute. By injecting material to support the nasal base and the nasolabial area where the bone has recessed, the procedure directly lifts the overlying skin and tissue. This repositioning effectively reduces the depth of the folds.
Outer Skin Degradation	Skincare & Prevention	Maintenance and protection: This approach focuses on slowing the degradation of the skin’s surface. It emphasizes avoiding external factors that destroy collagen and elastin—most notably through the consistent use of sunscreen—to prevent and delay the formation of fine lines and surface-level wrinkles.

Frequently Asked Questions (FAQ)

Medical Terminology for Smile Lines

Standard term: Nasolabial folds is the formal medical name used to describe the common "smile lines" found on the lower half of the face.

Available Injectable Treatments

Filler
Botox
Multi-cell fat grafting: This technique uses concentrated fat cells harvested from the patient's own body to provide a more permanent and natural-looking volume boost.

Identifying the Location of Nasolabial Folds

Anatomical landmarks: These folds are the diagonal creases or lines that run from the sides of the nostrils (the nasal wings) down toward the corners of the mouth.

Consult with Specialists For Free

The Face-Lock™ Facelift Procedure

Comparative analysis: How does the Face-Lock™ facelift procedure differ from a standard facelift? To explore the unique technical advantages and the superior results offered by our specialized method, please click the link below to continue reading.

Review: Khun Nee

Review: Khun Pook

Is the Face-Lock™ Facelift Procedure Painful?

Review: Khun Su

Review: Khun Oh

Review: Khun Got

Review: Khun Golf Kanjohn Phakdeevijit

Review: Khun Ann

Review: Khun Taeng

Summary.

Nasolabial folds are a complex anatomical condition resulting from a combination of several factors, including shifts in fat volume, skin laxity, age-related bone resorption, and the degradation of the skin’s internal components due to external triggers.

Identifying the specific root cause is the first and most critical step for medical professionals when designing an effective treatment plan. Determining whether the primary issue is tissue laxity, structural collapse, or diminished skin quality allows for the selection of the most appropriate intervention—whether that involves lifting, volume replenishment, or skin restoration.
Ultimately, a holistic approach that considers all contributing factors, such as the Face-Lock™ facelift procedure, leads to the most natural and optimal results, perfectly tailored to each patient’s unique anatomy.

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