Fotona 4D in Singapore:
what the four Er:YAG and Nd:YAG modes do, and how they compare with laser lifting here

What is Fotona 4D?

Fotona 4D is the name Fotona, a Slovenian laser manufacturer, gives to a protocol rather than to a machine. It runs on the company's dual-wavelength platforms, which house an erbium YAG laser at 2,940 nm and an Nd:YAG laser at 1,064 nm in one console with interchangeable handpieces. The two wavelengths behave very differently in skin. Er:YAG at 2,940 nm is absorbed by water so strongly that in its usual pulse it vaporises tissue cleanly, which is why it is an ablative resurfacing laser; stretched into a long train of low-power pulses, its SMOOTH mode heats the surface without removing it. Nd:YAG at 1,064 nm is absorbed weakly by water and melanin, so it travels deep and heats the dermis as a volume. Fotona 4D uses each wavelength twice, in a different mode each time, which is where the four comes from.

The protocol was described in the literature in 2019 by one of its originators, with settings for each handpiece, and the sequence is usually completed in one visit. Recovery after the first three steps is mostly warmth and pinkness; the fourth step adds a short phase of fine flaking. Fotona markets variants under other names, including a version without the intraoral step; this page describes the four-step face protocol.

What is Fotona SMOOTH mode, and why is it used inside the mouth?

SMOOTH is the technical idea that makes the protocol unusual. A normal Er:YAG pulse delivers its energy so fast that water in the tissue boils and the surface is ablated. SMOOTH stretches the same energy across a long sequence of lower-power micro-pulses, roughly a quarter of a second in total, so heat builds in the surface layers without reaching the point of vaporisation. The surface stays intact, and the thermal effect is confined to a shallow band beneath it. Published periocular work uses this mode on the thin skin around the eye for static lines and laxity, and the same mode underpins Fotona's intravaginal erbium treatments, which is why a patient may have met it under another name.

In Fotona 4D the mode is applied intraorally. The handpiece is placed inside the mouth against the mucosa of the cheek and lips, so the fat pad and the tissue behind the nasolabial fold are heated from the inside, through a wet lining that is spared the surface injury skin would suffer. Small studies with blinded assessment, including a split-face pilot using optical coherence tomography, describe improvement in nasolabial fold grade after a course of intraoral SMOOTH treatment, . The evidence is early and from small series, which is how it should be read.

What SMOOTH mode is not: it is not an ablative resurfacing, it is not a fractional laser in the usual sense, and it is not a mechanism for lifting a descended fat pad or tightening the SMAS. It conditions the lining and the shallow tissue behind it. A patient with a deep fold caused by a descended cheek rather than by a thinned lip and cheek lining has a different problem, and the nasolabial folds guide sets out how that is assessed.

“Fotona 4D conditions the face. The Time Freeze Laser LCLR® takes away the excess. Which one a face needs is a question about layers, not about brands.”

Dr Sin YongOn Fotona 4D and laser lifting

What do the FRAC3, PIANO and SupErficial steps add?

FRAC3: short Nd:YAG pulses

FRAC3 fires 1,064 nm energy in very short pulses from a small spot. Because the wavelength is absorbed weakly and the pulse is brief, heat concentrates wherever tissue is slightly more absorbent, in small vessels, pigment and denser collagen, producing scattered islands of higher temperature at depth. Fotona describes this as a three-dimensional fractional pattern created by tissue differences rather than by a scanning grid. In the 4D protocol the handpiece is run along the lines where the soft tissue is anchored, with the stated intention of creating tension vectors.

PIANO: long Nd:YAG pulses

PIANO is the opposite pulse. A large spot delivers 1,064 nm energy over many seconds, so the dermis and the tissue beneath it are heated gently and evenly as a volume, with the skin surface monitored to a target temperature. This is bulk heating for collagen contraction and remodelling, the same principle that monopolar radiofrequency and long-pulsed laser tightening rely on. It is the step that most resembles what the Time Freeze Laser LCLR® does with its 1,064 nm wavelength, and the part of the protocol with the clearest mechanism.

SupErficial: a light Er:YAG peel

The final step uses the Er:YAG at a fluence far below resurfacing, removing only the outermost layer of dead cells. It is a laser peel rather than a resurfacing: the skin looks pink and may flake finely, and the aim is texture and glow rather than any structural change. In a patient with reactive, darkening-prone skin this is the step most likely to be omitted, because it is the only one that disturbs the surface.

A recent prospective study in Chinese women used three-dimensional imaging after a course of the dual-wavelength protocol and recorded early tightening in the lateral periorbital region that partially rebounded over the following months, with mild improvement persisting. That pattern, an early contraction followed by partial settling, is the honest shape of most bulk-heating treatments and a reason to plan them as a course with review rather than as a single event.

Who suits Fotona 4D, who does not, and how is it regulated in Singapore?

Fotona 4D is marketed for mild to moderate laxity of the lower face, early jowling, nasolabial folds, perioral lines, dull texture and enlarged pores, in a patient who wants a route with no injected product and little recovery. Because the main heating steps use 1,064 nm, which is weakly absorbed by melanin, the protocol is usable across Fitzpatrick skin types with appropriate settings; the SupErficial peel and any Er:YAG step are where darker skin needs caution.

• Suits: early laxity with skin that still recoils, shallow nasolabial folds from thinning rather than descent, crepey perioral skin, a patient between structural treatments who wants maintenance.
• Suits with planning: recent filler, which changes where heat is placed; a history of cold sores, where antiviral cover is considered before any intraoral or perioral laser; darker skin, where the surface step is reduced or omitted.
• Does not suit: active infection in the mouth or on the face; pregnancy; isotretinoin within the interval the doctor sets; a recent tan; photosensitising medicines.
• Directed elsewhere: a descended cheek or a heavy, mobile jowl, which are layer problems that bulk heating does not move; redundant skin, which is referred to a plastic surgery specialist; volume loss, which is a filler or biostimulator question.

In Singapore every laser of this class is a medical device regulated by the Health Sciences Authority and must be registered before supply, and laser treatment of the face may only be performed by a registered medical practitioner in licensed premises. Fotona platforms are distributed here through a local distributor and are in use in a number of clinics. Whether a given clinic runs the full four-step protocol, a two-step version or its own sequence is worth asking, because the name is applied loosely. The aesthetic medicine regulation page explains what the licensing framework does and does not cover.

How does Fotona 4D compare with the Time Freeze Laser LCLR® and the VF Lift – Vertical Facelift?

The three are non-surgical lifting protocols that heat tissue without incisions, and they overlap most at the PIANO step. They differ in energy, in whether the mouth is involved, and in what the protocol is designed to take away.

The practical distinction Dr Sin Yong draws is between conditioning and removal. Fotona 4D conditions: it warms the lining of the mouth and the dermis so that collagen contracts and remodels, and it is at its most sensible in a face whose laxity is early and whose folds come from thinning. The Time Freeze Laser LCLR® is built to target the excess, whether loose skin, a fat layer or earlier Sculptra or Ellansé, and take it away over a series, which is why it is the protocol for a puffy face or a pillow face rather than a lean one. The VF Lift – Vertical Facelift is planned zone by zone so that a slim face is not treated the way a full one is. The comparison between the last two is on VF Lift – Vertical Facelift vs Time Freeze Laser LCLR® for a sagging face, and Ultherapy vs VF Lift – Vertical Facelift vs Time Freeze Laser LCLR® adds focused ultrasound to the picture.

How does Dr Sin Yong approach a request for Fotona 4D?

Dr Sin Yong is a Global Key Opinion Leader for Fotona, holding the StarWalker PQX and StarWalker 4S Distinguished Practitioner designations issued through the company's Singapore distributor, and he is invited to share his clinical expertise with other doctors on Fotona and other platforms. At this practice Fotona technology is used as the StarWalker picosecond platform for tattoo removal; Fotona 4D is not one of the protocols described on this site. That familiarity is the reason this page can describe the four modes plainly, and also the reason it does not oversell them: a laser protocol is a set of settings, and the settings follow the face.

A request for Fotona 4D is therefore treated as a request for non-surgical lifting, and the assessment is the same one every lifting patient here has. He examines the face in profile and in animation, pinches the skin to judge recoil, palpates the thickness of skin and fat in each zone, and where earlier filler is suspected maps it with ultrasound before any heat is planned. The question he is answering is which layer has changed: skin, fibrous network, fat pad, or deeper support. Early laxity with thinning folds is a conditioning problem, which a four-mode laser sequence addresses elsewhere and the VF Lift – Vertical Facelift addresses here. A puffy or overfilled face is a removal problem, and the Time Freeze Laser LCLR® is the protocol built for that. A descended cheek or a heavy jowl is neither, and is referred rather than heated harder.

What decides the plan

• Which layer the examination finds at fault, and whether folds come from thinning or from descent.
• Skin type and any history of darkening, which sets whether a surface step is included.
• Earlier filler, threads or biostimulator in the field, confirmed on ultrasound where needed.
• How much recovery is acceptable, and whether a course with review suits the patient's calendar.
• Whether another protocol is staged alongside, on a separate day.

Aftercare in broad terms

After any laser heating of the face: cool the skin if it feels warm, avoid saunas, hot yoga and vigorous exercise on the day, use a bland moisturiser and daily broad-spectrum sunscreen, and after an intraoral step rinse with water after meals and avoid very hot food that evening. Blistering, lasting redness, a change in contour or any numbness is seen by Dr Sin Yong. Every treatment here is doctor-performed after an in-person assessment, and which lifting protocol fits is confirmed at that visit.