Equate Acne Treatment System Review for Acne Acars
Plast Aesthet Res 2020;7:66. ten.20517/2347-9264.2020.166 © The Author(s) 2020.
Open Access Review
Review on the treatment of scars
Correspondence Address: Dr. Daniel J. Callaghan, Colorado Dermatology Specialists, 3540 Southward Poplar St Suite 300, Denver, CO 80237, United states. Electronic mail: danieljcallaghan3@gmail.com
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Received: 16 Aug 2020 | First Conclusion: 15 Sep 2020 | Revised: 29 Sep 2020 | Accepted: 26 Oct 2020 | Published: 18 November 2020
Bookish Editor: James Eastward. Zins | Copy Editor: Cai-Hong Wang | Production Editor: Jing Yu
Abstract
Scarring is a major concern for patients. From acne scarring to surgical scars, scars can have a dramatically negative effect on one's self-esteem and are a common complaint for which patients seek handling. This review will focus on the treatment of acne scarring including ice pick, boxcar and rolling scars, and as well the treatment of surgical scars including atrophic and hypertrophic scars.
Keywords
Scarring, acne scarring, surgical scars
Introduction
Scarring is a condition that aesthetic physicians are frequently called upon to improve. The treatment of scars can be a rewarding albeit frustrating effort. Scars or scarring come in a number of varieties, and treatment must exist tailored specifically for each patient. This chapter will focus on the handling of acne scars and surgical scars every bit these are most routinely encountered in practice. Acne tin can produce ice pick, rolling or boxcar scars and treatment can vary widely from the utilize of fillers, trichloroacetic acid (TCA) or energy-based devices. Similarly, surgical scars can exist treated with a number of modalities from injectables such as intralesional triamcinolone or 5-fluoruracil (five-FU) to resurfacing technologies.
Acne scars
When it comes to facial rejuvenation, the treatment of acne scars is i of the things that can make the about dramatic improvement. While acne, and thereby acne scarring, generally occurs in ane's teens or twenties, patients can come in requesting treatment of acne scarring at whatever age. Acne scarring is generally classified equally ice pick, rolling or boxcar, and the treatments of each subtype can vary. That said, patients typically have a diverseness of these subtypes at whatsoever given time, and this must be taken into business relationship when deciding on the preferred treatment approach. I challenge in determining the optimal approach for treating acne scars is that there is a dearth of high-quality studies. The studies that exist are ofttimes small and underpowered, biased, without compatible baseline variables or outcomes or without long-term follow-up[1].
Ice pick scars
Ice pick scars are deep but narrow (< 2 mm) scars that await like they could take been created past an water ice pick. Due to the depth of the scars, which can extend into the dermis, they are often more resistant to the typical treatment modalities used for rolling or boxcar scars. Although they have less handling options in general, the ones that they have tin provide superb results.
Punch excision is an excellent handling option for ice selection scars. Although this is essentially trading a scar for a scar, the scars created past the punch excision itself ofttimes heal to the point they are difficult to encounter[2]. For the all-time cosmetic event, scars should exist at least four-5 mm autonomously to exist treated at the same fourth dimension. Otherwise, in that location volition exist too much tension on the pare surface for them to heal optimally. If scars are within iv-5 mm of i some other, then waiting 4 weeks betwixt treatments will provide the best long-term results[3].
The use of TCA, particularly with the CROSS technique (chemical reconstruction of skin scars), has more recently emerged as a treatment option for ice selection scars. The Cantankerous technique involves using an instrument such as a syringe needle or a sharpened wooden applicator that is dipped into high-concentration TCA and and so applied directly onto the scar. The desired endpoint is a white frosting of the scar. TCA creates coagulative necrosis of the epidermis, thereby increasing collagen product which ultimately results in improvement of the scar[2].
In a study of xxx patients treated with the Cross technique utilizing 100% TCA every two weeks for a total of four sessions, Khunger et al.[iv] found that 73% of patients achieved first-class improvement in ice selection scars, whereas 20% accomplished skillful improvement. Side effects of this technique include hypopigmentation which is largely transient, a burning or tingling sensation at the time of treatment and erythema or edema[4]. The CROSS technique has also been described using other chemicals such as 88% phenol with like results equally TCA[5].
Although free energy-based devices often provide less-than-satisfactory results for the handling of ice choice scars, Ramesh et al.[6] found that ice pick scars responded better than rolling or boxcar scars to a fractional radiofrequency (FRF) device. Conversely, other studies found the opposite result[6,7].
Rolling scars
Rolling scars are typically ≥ four mm in diameter and take soft, irregular walls which gives them a rolling advent. These are caused by bands that tether the subcutis to the dermis. As such, the treatment of these scars mostly targets these bands to meliorate their appearance.
Subcision has been a longstanding technique to target and release these bands. In this method, an musical instrument, such as a needle, is inserted into the subcutaneous plane and fanned back and further in an effort to sever these bands. Blunt blade subcision has too been used, in which a edgeless blade is inserted in a single puncture site and is able to safely treat a wider area. A study past Barikbin et al.[viii] involving 18 patients with mainly rolling scars establish that this method led to marked improvement in 50% of patients, while 33% had moderate improvement and 17% balmy comeback[8].
Fillers have also been used to treat rolling scars. Sapra et al.[9] looked into the use of poly-L-lactic acid for the handling of rolling scars in 22 patients and found that 68.2% of patients had a satisfactory response as judged by blinded-evaluators. Hyaluronic acrid and calcium hydroxyapatite have also been used to treat acne scars with success[ten,11].
Resurfacing is also used to care for rolling scars but volition be discussed farther beneath. Although it is non straight targeting the bands tethering the scars down, it can be effective in many circumstances.
Boxcar scars
Boxcar scars are wider than ice pick scars (ane-4 mm in diameter) which gives them a U-shaped appearance. Their sharply demarcated edges are in contrast to the soft edges of rolling scars and can extend 0.ane-0.5 mm into the dermis. Although boxcar scars are indeed a singled-out class of acne scar, they are seldomly studied in isolation but rather are near often grouped together with the handling of other types of scars.
In general, boxcar scars are treated with resurfacing, which tin can be performed with anything from a chemical peel or microneedling to a number of different energy-based devices. The aggressiveness of the treatment is often correlated to the results obtainable, just besides must exist weighed confronting the risks as well as the acceptable downtime for the patient.
Microneedling tin can be performed either with a dermaroller or a microneedling pen, and can be performed alone or with the apply of a variety of topical applications to the pores created by microneedling such as platelet rich plasma (PRP). Alam et al.[12] performed a randomized, split up-face study with a dermaroller on a number of morphologic acne scar types and establish that later 3 treatments there was improvement in scarring, with a mean deviation of 3.four based on the quantitative global scarring grading system (P = 0.03)[12]. A separate blinded, randomized controlled trial involving 42 patients comparing microneedling to a non-ablative fractional erbium 1,340-nm laser found that both were effective and that there was no statistically significant deviation between the two (P = 0.264). Microneedling had fewer side effects and less downtime[thirteen]. I study institute microneedling combined with the use of PRP to be more effective than microneedling alone; however, an alternative written report demonstrated no difference in these outcomes[14,15].
Of the free energy-based devices, fully ablative lasers typically offer the best corrective outcomes, but at the cost of the longest downtime and greatest risk for adverse events. Walia and Alster[16] demonstrated a 75% improvement in atrophic acne scars at xviii months after high-free energy COtwo light amplification by stimulated emission of radiation handling[16]. However, erythema lasting on boilerplate 3.5 months and a 36% incidence of hyperpigmentation help explain why this is not a commonly used modality to care for acne scars.
Fractional ablative lasers take helped to fill up this void. They are effective but have a more than acceptable recovery and side effect profile than fully ablative lasers. Bjørn et al.[17] found that a partial CO2 laser improved acne scarring with pocket-size postoperative adverse effects, and that a treatment interval of either 1month or 3 months did not influence the final outcome. Cho et al.[eighteen] compared the efficacy of fractional COii to non-ablative partial light amplification by stimulated emission of radiation (NAFL) treatment with the 1,550-nm erbium:drinking glass laser. They found that while the fractional CO2 light amplification by stimulated emission of radiation demonstrated greater comeback, it was not statistically significant as at that place were but 8 patients in the study[18]. This improvement came at the cost of greater adverse effects including erythema and crusting.
NAFL are a mainstay in the treatment of acne scarring. With a lower downtime than ablative fractional lasers, patients often prefer them even if they may crave more treatment sessions to attain equal results. Sardana et al.[nineteen] institute that boxcar scars were almost responsive to handling with the 1,540-nm erbium:drinking glass laser, demonstrating a 52.9% comeback compared to rolling scars which had a 43.1% improvement. Boxcar scars had a statistically significant comeback afterwards four sessions (P < 0.05). Ice selection scars showed the everyman comeback charge per unit of merely 25.ix%, although this was not statistically significant (P = 0.09)[19].
Radiofrequency devices tin can exist monopolar, bipolar or fractional. Of these, FRF devices seem to provide the best results, with an expected improvement of 25% to 75% after iii to four sessions. Although adverse effects are limited, the procedure itself can exist associated with a significant amount of pain, even with nervus blocks or topical anesthesia[20,21].
Erythematous scars
Across treating the textural changes of acne scarring, a typical complaint is post-inflammatory erythema. Although with time, this typically resolves on its own, but it tin take months if non years. Vascular lasers such as the 595-nm pulsed dye light amplification by stimulated emission of radiation (PDL) or 532-nm potassium titanyl phosphate (KTP) laser are widely used to treat this erythema because of their consistent and reliable results with minimal adverse effects.
Surgical scars
Physicians must be well-versed in the treatment of surgical scars. Every patient heals differently, and fifty-fifty the most precise surgical technique can atomic number 82 to scarring. The treatment of an unfortunately placed or unsightly scar can exist the most firsthand thing a patient can do to improve his or her appearance, as the scar is often the first thing 1's eye is attracted to upon seeing a person.
There are a number of things to consider when treating a surgical scar, including the timing of when interventions should be implemented, and what specific interventions should take place. Scars can manifest in a number of ways, and may be erythematous, raised or depressed.
Perhaps the earliest question that physicians or surgeons face in the management of scars is what should patients practice in the immediate backwash of surgery. Beyond advisable wound care and timely suture removal, patients oft inquire about the benefit of silicone gel sheeting. Although there have been a number of studies published touting the effects of silicone gel sheeting not just for preventing hypertrophic scars but also to treat those that are already present, a systematic review involving 20 trials and 873 patients found the bear witness to exist weak and heavily susceptible to bias[22].
Hypertrophic scars
Hypertrophic scars are commonly treated with a number of modalities including intralesional kenalog (ILK), 5-FU or laser treatments. ILK has long been considered the first line handling of hypertrophic scars. ILK suppresses inflammation, causes vasoconstriction which reduces the delivery of oxygen and nutrients to the scar and too has an antimitotic effect, inhibiting the growth of keratinocytes and fibroblasts. Additionally, it reduces plasma protease inhibitors which degrade collagen through collagenase[23]. The concentration used needs to exist carefully considered for each individual scar and is dependent on the size and location of the scar. Information technology is prudent to start with a lower dose with the expectation that multiple treatments may exist necessary rather than risk using a higher dose which may lead to atrophy and pigmentary changes. It is much easier to treat conservatively than to take to treat additional complications downward the line.
5-FU is a well-established admitting less commonly used technique for the treatment of hypertrophic scars. five-FU is an antimetabolic agent that has been demonstrated to inhibit fibroblast proliferation and subtract collagen synthesis[24]. It tin can be used lonely or in combination with ILK, and has been shown to subtract the risk of side effects of ILK when used in combination[25,26]. v-FU should not exist used in patients who have an infection, are meaning or have anemia, leukopenia or bone marrow suppression. 5-FU is typically injected at a dose of 50 mg/mL for a maximum dose ranging from 50-150 mg. Information technology can be diluted with ILK, which is typically diluted to a dose of 2 to x mg/mL dependent on the size and location of the scar. Care must exist taken to avoid overtreating the scars, which can lead to atrophy, being more challenging to care for.
Both ablative and non-ablative resurfacing are besides popular techniques in treating hypertrophic scars. More than recently, these have been combined with laser-assisted drug delivery with corticosteroids or 5-FU[27,28]. The apply of 5-FU has been demonstrated to be as effective but with fewer side effects than the use of corticosteroids in laser-assisted drug delivery[28].
Dermabrasion is ane of the oldest methods used to revise scars. It can be done manually with sandpaper, or mechanically with a rotating wire castor or diamond fraise. Dermabrasion, peculiarly mechanical dermabrasion, is extremely operator dependent and carries a number of risks including making the scar worse. A randomized controlled trial comparison partial ablative resurfacing to dermabrasion constitute that while both were effective, laser resurfacing was safer and showed quicker clinical recovery[29]. Conversely, in a randomized, blinded, split-scar written report involving 14 patients, manual dermabrasion with sterilized sandpaper was demonstrated to be an effective simply safe, simple and cost-effective treatment option for surgical scars[30]. Mechanical dermabrasion has fallen out of favor due to the risks associated with aerosolization of blood.
Atrophic scars
Atrophic surgical scars evidence a different set of challenges than hypertrophic scars and can more often than not be more difficult to treat.
Fractional laser therapy with either not-ablative or fully ablative lasers has been shown to improve the color, texture, thickness and patient satisfaction of atrophic surgical scars[31-33]. These lasers are effective because they stimulate neocollagenesis and dermal remodeling.
The use of fillers has been shown to improve the appearance of atrophic surgical scars. Both hyaluronic acid and calcium hydroxyapatite have been shown to be safety and constructive with the additional benefit of having an immediate comeback[34]. One downside to the use of fillers is that the results are not permanent.
Pigmentary changes
Pigmentary changes can affect both hypertrophic and atrophic scars. The most common color modify is typically erythema, resulting from the healing process that stimulates neovascularization. Scars tin can also be hyper- or hypopigmented. Although the previously mentioned techniques to care for scar texture may provide the added benefit of improving such pigmentary changes, in many cases this must be addressed separately.
Erythematous scars tend to be relatively receptive to treatment. PDL has long been used to treat erythematous surgical scars. It has been shown to be constructive at both short and long pulse durations[35]. Although comeback in erythema should be the main objective when treating surgical scars with PDL, it has been shown to better texture as well[36]. The 532-nm KTP laser is likewise well-established for the treatment of scars and has been demonstrated to exist comparable in safety and efficacy to PDL[37].
Hypopigmented scars can be challenging to treat; however, the combination of fractional resurfacing with the use of topical tretinoin, pimecrolimus or bimatoprost has been shown to exist effective at re-pigmenting the scar[38]. Similarly, laser-assisted drug delivery of bimatroprost has been shown to be effective at repigmenting hypopigmented scars[39].
Emerging technologies
Although this chapter focused on the most commonly used techniques to treat scars, the field of medicine is always working on emerging technologies that may one day complement or replace standard therapies. One such technology that may play a role in the direction of scarring is laser speckle contrast imaging (LSCI). LSCI illuminates tissue with coherent light amplification by stimulated emission of radiation low-cal and then detects backscatter from the tissue which ultimately can be used to detect blood flow[40]. This is relevant to scarring because adequate tissue perfusion is necessary for the healing procedure to take place. This technology has been studied in patients with systemic sclerosis and tin can detect a reduction of blood perfusion in areas affected by Raynaud's phenomenon. It also has been used to demonstrate that a decrease in claret perfusion is found in patients with microangiopathy[41]. LSCI has also been used to help evaluate burn wounds which is important, because information technology tin discover the severity of fractional-thickness wounds, which in turn influences handling[42].
Conclusion
Scarring, regardless of etiology, is a challenging but treatable condition that can make a significant difference in the lives of patients. Although energy-based devices are the workhorses of many handling regimens, they are not admittedly necessary, and any medico tin can be equipped to manage them. A thorough agreement of different types of scars is crucial to tailor a handling course for private patients. The treatment of acne scars differs depending on whether they are ice pick, rolling or boxcar scars. Surgical scars may be raised or depressed, or suffer from pigmentary changes, and treatments vary for each. Every bit our understanding of the formation and maturation of scars continues to develop, new technologies will likely emerge to target scars or even inhibit their formation altogether.
Declarations
Authors' contributions
Contribute solely to the article: Callaghan DJ
Availability of data and materials
Not applicable.
Financial support and sponsorship
None.
Conflicts of interest
The author declared that at that place are no conflicts of interest.
Upstanding approval and consent to participate
Not applicative.
Consent for publication
Non applicative.
Copyright
© The Writer(due south) 2020.
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Cite This Article
Callaghan DJ. Review on the treatment of scars. Plast Aesthet Res 2020;7:66. http://dx.doi.org/10.20517/2347-9264.2020.166
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