Based on information in this pdf make notes on “dermabrassion” for md

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dermabrasion procedure indications complications dermatology review

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Dermabrasion

Definition

Dermabrasion is a controlled mechanical resurfacing procedure in which raised, altered, scarred, or normal skin is sequentially planed from the epidermis into the papillary dermis, and when required up to the upper-mid reticular dermis. The wound is then allowed to heal by secondary intention, producing levelling of scars/lesions and improved surface texture.

Safe principle: Abrasion should not extend beyond the upper reticular dermis. Deeper injury risks permanent scarring.
Source: Uploaded “Dermabrassion acsi” chapter, pp. 317-322.

Principle and wound healing

Mechanical removal of epidermis and part of dermis creates a controlled wound.
Re-epithelialization occurs from:
- Wound margins
- Hair follicles
- Pilosebaceous units
- Sweat gland epithelium
Epithelial regeneration begins within 24 hours and is generally completed in 7-12 days.
Dermal remodelling continues for months:
- Better-organized collagen bundles
- Increased elastic fibers
- Reduced elastosis
- Improvement in rhytides, dyschromia, texture, and scar contour.
Clinical aim is to reorganize papillary dermal collagen without entering deep reticular dermis.

History

1905: Kronmayer used power-driven abrading instruments on chilled skin for post-acne scars.
He showed that wounds heal without scarring if the reticular dermis is not penetrated.
1953: Kurtin reported use of modified dental equipment.
1954: Black coined the term dermabrasion.
Diamond fraise and wire-brush attachments were subsequently introduced.
In India, Maneksha (1955) used sandpaper surgery for smallpox scars, acne scars, tattoos, and related defects.

Indications

1. Scars

Post-acne scars, especially broad atrophic scars
Traumatic scars
Surgical scars
Varicella, herpes zoster, and smallpox scars
Scar revision and blending of scar margins

2. Acne-related indications

Chronic resistant acne in selected cases
Enlarged pores
Acne rosacea
Acne scars

3. Stable vitiligo

Used to prepare the recipient area before:

Suction blister grafting
Ultrathin skin grafting
Melanocyte-keratinocyte suspension procedures

4. Hyperkeratotic dermatoses

Lichen simplex chronicus
Hypertrophic lichen planus
Papular lichen amyloidosis
Porokeratosis
Linear verrucous nevus
Prurigo nodularis

5. Pigmentary conditions

Melasma
Freckles
Post-inflammatory hyperpigmentation
Periorbital hypermelanosis
Tattoos

6. Benign raised lesions and selected disorders

Syringoma
Trichoepithelioma
Adenoma sebaceum
Seborrhoeic keratosis
Darier disease
Rhinophyma

7. Photoaging and actinic lesions

Fine wrinkles and rhytides, especially perioral rhytides
Photoaging
Actinic keratosis and actinic cheilitis in selected settings
Facial rejuvenation

High-yield: Dermabrasion is particularly useful for deep scars, rhinophyma, and perioral rhytides. It may be combined with scar revision, electrosurgery, radiosurgery, or chemical peeling.

Contraindications

Absolute or major contraindications

Keloidal tendency or history of hypertrophic scarring
Active bacterial, viral, or fungal infection, including active herpes simplex
Bleeding disorders or anticoagulation not appropriately managed
Poor wound-healing capacity
Collagen vascular disease
Atrophic, hairless scars following burn or trauma
Recent isotretinoin therapy. The source advises waiting 12-18 months.

Relative contraindications / need special counselling

Fitzpatrick skin types IV-VI due to increased risk of post-inflammatory hyperpigmentation and hypopigmentation
Active acne: should be under complete control before dermabrasion
Prior resurfacing procedure: may give less dramatic benefit and greater pigmentary risk
Neck dermabrasion: generally avoided because of thin dermis, fewer adnexal structures, and high risk of hypertrophic scarring and dyspigmentation.

Preoperative assessment and preparation

Patient counselling

Explain that:

Improvement is partial, not complete.
Approximate improvement may be 50-70% in suitable cases.
Deep acne scars may improve less.
Multiple sessions may be needed.
Healing requires 7-14 days, with prolonged erythema possible.
Strict sun avoidance and photoprotection are necessary for about 3 months.
Preoperative and postoperative clinical photographs should be taken.

Pre-treatment of scars

About 6-8 weeks before the procedure, consider:

Subcision/undermining
Punch excision and closure
Punch elevation
Punch excision with graft replacement
Electrocautery or radiosurgery for elevated lesion borders.

Other measures

Treat infection and active acne first.
Antiviral prophylaxis is considered in patients with a history of herpes labialis.
Assess for bleeding tendency, keloidal tendency, isotretinoin intake, and pigmentary risk.

Equipment

Manual dermabrasion

Sterile sandpaper/waterpaper
Hand-held metallic dermabraders
Silicon carbide paper or similar abrasive material

Motorized dermabrasion

Power-driven handpiece
Wire brush
Diamond fraise
Serrated wheel in some systems
Cryogen/refrigerant spray or tumescent technique to firm skin when required
Suction/air-evacuation system and appropriate personal protective equipment because motorized abrasion can aerosolize blood and infectious particles.

Abrasive instruments

Instrument	Features
Wire brush	Fast and aggressive. Removes tissue deeply with minimal pressure. Gives excellent improvement in deep scars but has a narrow margin of safety and requires expertise.
Diamond fraise	Diamond-studded wheel or cone. Safer, slower, and more forgiving. Coarse fraise causes deeper abrasion; fine fraise is used for polishing and blending.
Manual dermasanding	Better control over depth, useful near lips, orbital rims, scar edges, and for blending treated and untreated skin. Lower risk of aerosolization.

Anaesthesia

May be done under:

Local anaesthesia with regional nerve blocks
Intravenous sedation
General anaesthesia for extensive/full-face procedures

Regional blocks for full-face procedures may include:

Supraorbital
Infraorbital
Mental nerve blocks

Cryoanesthesia/refrigerant spray can make the skin firm and facilitate even abrasion. Excessive freezing must be avoided because it can cause focal necrosis, hypopigmentation, or scarring.

Technique

General steps

Cleanse, mark lesions/scars, take photographs, and obtain informed consent.
Provide anaesthesia and achieve adequate skin tension.
Divide the face into cosmetic units or small segments.
Start centrally or in dependent areas and work outward.
Hold the handpiece firmly and keep movement perpendicular to the plane of rotation.
Maintain the instrument parallel to the skin surface.
Treat segmentally, with overlap or feathering at natural boundaries such as:
- Hairline
- Nasolabial fold
- Vermilion border
- Submandibular border
Avoid rotary or repeated back-and-forth motion, which can produce gouging.
Exercise special caution over:
- Eyelids and orbital rim
- Lips and vermilion margin
- Nasal alae
- Jawline
Do not dermabrade the neck.

Treatment of pitted scars

Stretch the scar.
Use a pear-shaped diamond fraise.
Lightly abrade the scar base.
Abrade the scar edge more firmly to create “shouldering” and blend it with surrounding skin.

Endpoint of abrasion: depth markers

Level reached	Clinical appearance
Epidermis removed	Loss of surface pigment
Superficial papillary dermis	Numerous fine punctate bleeding points
Mid-deep papillary dermis	Larger, more widely spaced bleeding points with increased splatter
Deep papillary-upper reticular junction	Faint pinkish, whitish, or grey parallel lines/ridges
Upper-mid reticular dermis	More bleeding, fraying/breaks in parallel lines and increasing resistance. This is the adequate endpoint for deeper abrasion.
Lower reticular dermis	Yellow fat herniation: stop immediately, as this signifies excessive depth.

Exam point: When unsure, it is preferable to under-abrade rather than over-abrade.

Postoperative care

Apply wet gauze initially to control ooze and bleeding.
Use non-adherent paraffin/Xeroform-type dressing or appropriate occlusive dressing.
Maintain cleansing, lubrication, and regular removal of serum and crust.
Use analgesics for pain relief.
Antibiotics/antivirals may be used according to clinical risk and local protocol.
Serous ooze occurs for 2-3 days, followed by crust formation.
Crust/dressing separates as epithelialization occurs, usually by 7-12 days. It may take up to 10-15 days in some areas.
Use emollients and broad-spectrum sunscreen after healing.
Avoid direct sun exposure for about 3 months.
Cosmetics should be avoided until complete re-epithelialization.
Persistent erythema, hyperpigmentation, acne, milia, and infection should be reviewed promptly.

Side effects

Usually temporary:

Pain and discomfort
Edema
Erythema
Serous exudation
Crusting
Milia
Transient acne flare
Reversible hyperpigmentation
Persistent erythema
Hypopigmentation, which may be permanent

Complications

Intraoperative

Excessive bleeding
Gouging and uneven depth
Damage to lips or mucosal tears
Ocular injury from refrigerant spray
Anaesthetic complications

Early postoperative

Infection:
- Staphylococcus aureus
- Herpes simplex virus
- Candida species
Allergic contact dermatitis
Acneiform eruption
Milia
Persistent erythema

Late complications

Post-inflammatory hyperpigmentation
Permanent hypopigmentation
Telangiectasia
Scarring
Hypertrophic scar/keloid
Demarcation lines or uneven texture

Advantages

Produces substantial cosmetic improvement, including in deep scars.
Treats a large facial area in one sitting.
Can be used for cosmetic, therapeutic, and selected prophylactic indications.
May be combined with scar revision, chemical peeling, electrosurgery, and radiosurgery.
Gives direct operator control over depth.
Comparatively inexpensive in experienced hands.
Useful for resistant perioral rhytides and rhinophyma.

Disadvantages

Operator-dependent procedure with a steep learning curve.
Requires surgical skill and careful depth assessment.
Painful and may require sedation or general anaesthesia.
Prolonged downtime and wound care.
Risk of infection, scarring, and pigmentary complications.
Strict photoprotection is required.
Multiple sittings may be necessary.
Deep ice-pick scars are not adequately corrected by dermabrasion alone.
Has been partly replaced by fractional lasers because lasers have more predictable depth control and shorter downtime in many indications.

Dermabrasion versus microdermabrasion

Feature	Dermabrasion	Microdermabrasion
Depth	Epidermis to papillary/upper reticular dermis	Stratum corneum and superficial epidermis
Nature	Surgical, ablative resurfacing	Superficial exfoliative procedure
Anaesthesia	Usually needed	Usually not required
Downtime	7-14 days or more	Minimal
Main role	Deep scars, rhytides, rhinophyma, scar contouring	Mild dyschromia, superficial texture change, adjunctive rejuvenation
Complications	More frequent and potentially serious	Generally fewer
Suitability in darker skin	Higher pigmentary risk	Relatively safer

Short conclusion for an MD theory answer

Dermabrasion is a controlled, mechanical, ablative skin-resurfacing technique that induces secondary-intention healing and dermal collagen remodelling. It remains useful for selected deep scars, rhinophyma, and perioral rhytides, but requires expert depth control, meticulous wound care, careful patient selection, and strict photoprotection. Its use has declined relative to fractional lasers because of prolonged downtime and risks of dyspigmentation, infection, and scarring.

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Dermabrasion

Definition

Dermabrasion is a controlled mechanical surgical resurfacing procedure in which the epidermis and superficial dermis are abraded using manual or motorized instruments. The wound heals by secondary intention, producing levelling of scars and improvement in texture.

Principle

Abrasion is done up to the papillary dermis or upper reticular dermis.
Re-epithelialization occurs from epidermal appendages and wound margins.
Healing starts within 24 hours and is usually complete in 7-12 days.
Dermal collagen remodelling over months improves scar contour, rhytides, and dyschromia.
Do not go beyond upper reticular dermis, as deep abrasion causes scarring.

Indications

Post-acne, traumatic, surgical, chickenpox, and smallpox scars
Fine wrinkles and photoaging, especially perioral rhytides
Rhinophyma
Stable vitiligo recipient-site preparation before grafting
Tattoos, freckles, melasma, and selected pigmentary lesions
Hyperkeratotic lesions: lichen simplex chronicus, hypertrophic lichen planus, papular lichen amyloidosis, prurigo nodularis
Selected benign lesions: seborrhoeic keratosis, syringoma, trichoepithelioma, adenoma sebaceum

Contraindications

Keloidal tendency or history of hypertrophic scar
Active bacterial, fungal, or viral infection, including herpes
Bleeding disorder
Poor wound healing/collagen vascular disease
Recent isotretinoin intake, preferably defer for 12-18 months
Atrophic hairless burn/traumatic scars
Dark skin types IV-VI: relative contraindication due to dyspigmentation risk
Avoid neck dermabrasion.

Instruments

Manual: sandpaper/waterpaper, metallic dermabraders
Motorized: wire brush, diamond fraise, serrated wheel

Wire brush: aggressive, rapid, suited for deeper scars, needs expertise.
Diamond fraise: safer, slower, useful for contouring and blending.
Manual dermasanding: provides better depth control, especially near lips and orbital margins.

Technique

Obtain consent, photographs, and counsel regarding realistic expectations.
Control active acne/infection; consider scar revision or subcision beforehand.
Give local/regional anaesthesia with sedation or GA for full-face procedures.
Stretch the skin and dermabrade in cosmetic units/segments.
Keep the handpiece parallel to skin and pull perpendicular to the axis of rotation.
Feather at borders and avoid gouging.
Treat pitted scars by abrading the base lightly and edges more firmly.

End point of dermabrasion

Epidermis removal: pigment disappears.
Papillary dermis: fine punctate bleeding points.
Deeper papillary dermis: larger, more widely spaced bleeding points.
Upper reticular dermis: parallel grey-white lines/ridges with increased bleeding.
Yellow fat droplets indicate excessive depth: stop immediately.

Postoperative care

Non-adherent dressing and regular cleansing/lubrication.
Analgesics; antibiotics/antivirals when indicated.
Serous ooze for 2-3 days, crusting follows.
Re-epithelialization in 7-12 days.
Emollients and strict sunscreen/sun avoidance for at least 3 months.
Avoid cosmetics until complete healing.

Adverse effects and complications

Common: pain, edema, erythema, oozing, crusting, milia, acne flare, transient hyperpigmentation.

Complications:

Infection: Staphylococcus aureus, HSV, Candida
Persistent erythema
Hyperpigmentation or permanent hypopigmentation
Telangiectasia
Gouging/uneven surface
Scarring, hypertrophic scar, keloid
Contact dermatitis
Anaesthesia-related complications

Advantages

Effective and relatively economical for deep scars and rhytides
Direct control over depth
Can treat a large area in one sitting
Can be combined with scar revision, peeling, electrosurgery, or radiosurgery

Disadvantages

Operator dependent, requires experience
Longer downtime and intensive wound care
Risk of pigmentary alteration, infection, and scarring
Deep ice-pick scars need additional procedures
Largely replaced by fractional lasers in many indications

One-line conclusion

Dermabrasion is an effective but technique-sensitive deep mechanical resurfacing procedure, mainly indicated for selected scars, rhinophyma, and perioral rhytides.

Based on information in this pdf make notes on “dermabrassion” for md derma theory exam, make it short and crisp yet readable and to be able to write an answer

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The uploaded PDF is “Electrosurgery acsi.pdf”, but you asked for notes on dermabrasion.

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electrosurgery dermatology principles electrodesiccation electrofulguration electrocautery

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Dermabrasion

Definition

Safe principle: Abrasion should not extend beyond the upper reticular dermis. Deeper injury risks permanent scarring.
Source: Uploaded “Dermabrassion acsi” chapter, pp. 317-322.

Principle and wound healing

Mechanical removal of epidermis and part of dermis creates a controlled wound.
Re-epithelialization occurs from:
- Wound margins
- Hair follicles
- Pilosebaceous units
- Sweat gland epithelium
Epithelial regeneration begins within 24 hours and is generally completed in 7-12 days.
Dermal remodelling continues for months:
- Better-organized collagen bundles
- Increased elastic fibers
- Reduced elastosis
- Improvement in rhytides, dyschromia, texture, and scar contour.
Clinical aim is to reorganize papillary dermal collagen without entering deep reticular dermis.

History

1905: Kronmayer used power-driven abrading instruments on chilled skin for post-acne scars.
He showed that wounds heal without scarring if the reticular dermis is not penetrated.
1953: Kurtin reported use of modified dental equipment.
1954: Black coined the term dermabrasion.
Diamond fraise and wire-brush attachments were subsequently introduced.
In India, Maneksha (1955) used sandpaper surgery for smallpox scars, acne scars, tattoos, and related defects.

Indications

1. Scars

Post-acne scars, especially broad atrophic scars
Traumatic scars
Surgical scars
Varicella, herpes zoster, and smallpox scars
Scar revision and blending of scar margins

2. Acne-related indications

Chronic resistant acne in selected cases
Enlarged pores
Acne rosacea
Acne scars

3. Stable vitiligo

Used to prepare the recipient area before:

Suction blister grafting
Ultrathin skin grafting
Melanocyte-keratinocyte suspension procedures

4. Hyperkeratotic dermatoses

Lichen simplex chronicus
Hypertrophic lichen planus
Papular lichen amyloidosis
Porokeratosis
Linear verrucous nevus
Prurigo nodularis

5. Pigmentary conditions

Melasma
Freckles
Post-inflammatory hyperpigmentation
Periorbital hypermelanosis
Tattoos

6. Benign raised lesions and selected disorders

Syringoma
Trichoepithelioma
Adenoma sebaceum
Seborrhoeic keratosis
Darier disease
Rhinophyma

7. Photoaging and actinic lesions

Fine wrinkles and rhytides, especially perioral rhytides
Photoaging
Actinic keratosis and actinic cheilitis in selected settings
Facial rejuvenation

High-yield: Dermabrasion is particularly useful for deep scars, rhinophyma, and perioral rhytides. It may be combined with scar revision, electrosurgery, radiosurgery, or chemical peeling.

Contraindications

Absolute or major contraindications

Keloidal tendency or history of hypertrophic scarring
Active bacterial, viral, or fungal infection, including active herpes simplex
Bleeding disorders or anticoagulation not appropriately managed
Poor wound-healing capacity
Collagen vascular disease
Atrophic, hairless scars following burn or trauma
Recent isotretinoin therapy. The source advises waiting 12-18 months.

Relative contraindications / need special counselling

Fitzpatrick skin types IV-VI due to increased risk of post-inflammatory hyperpigmentation and hypopigmentation
Active acne: should be under complete control before dermabrasion
Prior resurfacing procedure: may give less dramatic benefit and greater pigmentary risk
Neck dermabrasion: generally avoided because of thin dermis, fewer adnexal structures, and high risk of hypertrophic scarring and dyspigmentation.

Preoperative assessment and preparation

Patient counselling

Explain that:

Improvement is partial, not complete.
Approximate improvement may be 50-70% in suitable cases.
Deep acne scars may improve less.
Multiple sessions may be needed.
Healing requires 7-14 days, with prolonged erythema possible.
Strict sun avoidance and photoprotection are necessary for about 3 months.
Preoperative and postoperative clinical photographs should be taken.

Pre-treatment of scars

About 6-8 weeks before the procedure, consider:

Subcision/undermining
Punch excision and closure
Punch elevation
Punch excision with graft replacement
Electrocautery or radiosurgery for elevated lesion borders.

Other measures

Treat infection and active acne first.
Antiviral prophylaxis is considered in patients with a history of herpes labialis.
Assess for bleeding tendency, keloidal tendency, isotretinoin intake, and pigmentary risk.

Equipment

Manual dermabrasion

Sterile sandpaper/waterpaper
Hand-held metallic dermabraders
Silicon carbide paper or similar abrasive material

Motorized dermabrasion

Power-driven handpiece
Wire brush
Diamond fraise
Serrated wheel in some systems
Cryogen/refrigerant spray or tumescent technique to firm skin when required
Suction/air-evacuation system and appropriate personal protective equipment because motorized abrasion can aerosolize blood and infectious particles.

Abrasive instruments

Instrument	Features
Wire brush	Fast and aggressive. Removes tissue deeply with minimal pressure. Gives excellent improvement in deep scars but has a narrow margin of safety and requires expertise.
Diamond fraise	Diamond-studded wheel or cone. Safer, slower, and more forgiving. Coarse fraise causes deeper abrasion; fine fraise is used for polishing and blending.
Manual dermasanding	Better control over depth, useful near lips, orbital rims, scar edges, and for blending treated and untreated skin. Lower risk of aerosolization.

Anaesthesia

May be done under:

Local anaesthesia with regional nerve blocks
Intravenous sedation
General anaesthesia for extensive/full-face procedures

Regional blocks for full-face procedures may include:

Supraorbital
Infraorbital
Mental nerve blocks

Cryoanesthesia/refrigerant spray can make the skin firm and facilitate even abrasion. Excessive freezing must be avoided because it can cause focal necrosis, hypopigmentation, or scarring.

Technique

General steps

Cleanse, mark lesions/scars, take photographs, and obtain informed consent.
Provide anaesthesia and achieve adequate skin tension.
Divide the face into cosmetic units or small segments.
Start centrally or in dependent areas and work outward.
Hold the handpiece firmly and keep movement perpendicular to the plane of rotation.
Maintain the instrument parallel to the skin surface.
Treat segmentally, with overlap or feathering at natural boundaries such as:
- Hairline
- Nasolabial fold
- Vermilion border
- Submandibular border
Avoid rotary or repeated back-and-forth motion, which can produce gouging.
Exercise special caution over:
- Eyelids and orbital rim
- Lips and vermilion margin
- Nasal alae
- Jawline
Do not dermabrade the neck.

Treatment of pitted scars

Stretch the scar.
Use a pear-shaped diamond fraise.
Lightly abrade the scar base.
Abrade the scar edge more firmly to create “shouldering” and blend it with surrounding skin.

Endpoint of abrasion: depth markers

Level reached	Clinical appearance
Epidermis removed	Loss of surface pigment
Superficial papillary dermis	Numerous fine punctate bleeding points
Mid-deep papillary dermis	Larger, more widely spaced bleeding points with increased splatter
Deep papillary-upper reticular junction	Faint pinkish, whitish, or grey parallel lines/ridges
Upper-mid reticular dermis	More bleeding, fraying/breaks in parallel lines and increasing resistance. This is the adequate endpoint for deeper abrasion.
Lower reticular dermis	Yellow fat herniation: stop immediately, as this signifies excessive depth.

Exam point: When unsure, it is preferable to under-abrade rather than over-abrade.

Postoperative care

Apply wet gauze initially to control ooze and bleeding.
Use non-adherent paraffin/Xeroform-type dressing or appropriate occlusive dressing.
Maintain cleansing, lubrication, and regular removal of serum and crust.
Use analgesics for pain relief.
Antibiotics/antivirals may be used according to clinical risk and local protocol.
Serous ooze occurs for 2-3 days, followed by crust formation.
Crust/dressing separates as epithelialization occurs, usually by 7-12 days. It may take up to 10-15 days in some areas.
Use emollients and broad-spectrum sunscreen after healing.
Avoid direct sun exposure for about 3 months.
Cosmetics should be avoided until complete re-epithelialization.
Persistent erythema, hyperpigmentation, acne, milia, and infection should be reviewed promptly.

Side effects

Usually temporary:

Pain and discomfort
Edema
Erythema
Serous exudation
Crusting
Milia
Transient acne flare
Reversible hyperpigmentation
Persistent erythema
Hypopigmentation, which may be permanent

Complications

Intraoperative

Excessive bleeding
Gouging and uneven depth
Damage to lips or mucosal tears
Ocular injury from refrigerant spray
Anaesthetic complications

Early postoperative

Infection:
- Staphylococcus aureus
- Herpes simplex virus
- Candida species
Allergic contact dermatitis
Acneiform eruption
Milia
Persistent erythema

Late complications

Post-inflammatory hyperpigmentation
Permanent hypopigmentation
Telangiectasia
Scarring
Hypertrophic scar/keloid
Demarcation lines or uneven texture

Advantages

Produces substantial cosmetic improvement, including in deep scars.
Treats a large facial area in one sitting.
Can be used for cosmetic, therapeutic, and selected prophylactic indications.
May be combined with scar revision, chemical peeling, electrosurgery, and radiosurgery.
Gives direct operator control over depth.
Comparatively inexpensive in experienced hands.
Useful for resistant perioral rhytides and rhinophyma.

Disadvantages

Operator-dependent procedure with a steep learning curve.
Requires surgical skill and careful depth assessment.
Painful and may require sedation or general anaesthesia.
Prolonged downtime and wound care.
Risk of infection, scarring, and pigmentary complications.
Strict photoprotection is required.
Multiple sittings may be necessary.
Deep ice-pick scars are not adequately corrected by dermabrasion alone.
Has been partly replaced by fractional lasers because lasers have more predictable depth control and shorter downtime in many indications.

Dermabrasion versus microdermabrasion

Feature	Dermabrasion	Microdermabrasion
Depth	Epidermis to papillary/upper reticular dermis	Stratum corneum and superficial epidermis
Nature	Surgical, ablative resurfacing	Superficial exfoliative procedure
Anaesthesia	Usually needed	Usually not required
Downtime	7-14 days or more	Minimal
Main role	Deep scars, rhytides, rhinophyma, scar contouring	Mild dyschromia, superficial texture change, adjunctive rejuvenation
Complications	More frequent and potentially serious	Generally fewer
Suitability in darker skin	Higher pigmentary risk	Relatively safer

Short conclusion for an MD theory answer

Definition

Principle

Abrasion is done up to the papillary dermis or upper reticular dermis.
Re-epithelialization occurs from epidermal appendages and wound margins.
Healing starts within 24 hours and is usually complete in 7-12 days.
Dermal collagen remodelling over months improves scar contour, rhytides, and dyschromia.
Do not go beyond upper reticular dermis, as deep abrasion causes scarring.

Indications

Post-acne, traumatic, surgical, chickenpox, and smallpox scars
Fine wrinkles and photoaging, especially perioral rhytides
Rhinophyma
Stable vitiligo recipient-site preparation before grafting
Tattoos, freckles, melasma, and selected pigmentary lesions
Hyperkeratotic lesions: lichen simplex chronicus, hypertrophic lichen planus, papular lichen amyloidosis, prurigo nodularis
Selected benign lesions: seborrhoeic keratosis, syringoma, trichoepithelioma, adenoma sebaceum

Contraindications

Keloidal tendency or history of hypertrophic scar
Active bacterial, fungal, or viral infection, including herpes
Bleeding disorder
Poor wound healing/collagen vascular disease
Recent isotretinoin intake, preferably defer for 12-18 months
Atrophic hairless burn/traumatic scars
Dark skin types IV-VI: relative contraindication due to dyspigmentation risk
Avoid neck dermabrasion.

Instruments

Manual: sandpaper/waterpaper, metallic dermabraders
Motorized: wire brush, diamond fraise, serrated wheel

Technique

Obtain consent, photographs, and counsel regarding realistic expectations.
Control active acne/infection; consider scar revision or subcision beforehand.
Give local/regional anaesthesia with sedation or GA for full-face procedures.
Stretch the skin and dermabrade in cosmetic units/segments.
Keep the handpiece parallel to skin and pull perpendicular to the axis of rotation.
Feather at borders and avoid gouging.
Treat pitted scars by abrading the base lightly and edges more firmly.

End point of dermabrasion

Epidermis removal: pigment disappears.
Papillary dermis: fine punctate bleeding points.
Deeper papillary dermis: larger, more widely spaced bleeding points.
Upper reticular dermis: parallel grey-white lines/ridges with increased bleeding.
Yellow fat droplets indicate excessive depth: stop immediately.

Postoperative care

Non-adherent dressing and regular cleansing/lubrication.
Analgesics; antibiotics/antivirals when indicated.
Serous ooze for 2-3 days, crusting follows.
Re-epithelialization in 7-12 days.
Emollients and strict sunscreen/sun avoidance for at least 3 months.
Avoid cosmetics until complete healing.

Adverse effects and complications

Common: pain, edema, erythema, oozing, crusting, milia, acne flare, transient hyperpigmentation.

Complications:

Infection: Staphylococcus aureus, HSV, Candida
Persistent erythema
Hyperpigmentation or permanent hypopigmentation
Telangiectasia
Gouging/uneven surface
Scarring, hypertrophic scar, keloid
Contact dermatitis
Anaesthesia-related complications

Advantages

Effective and relatively economical for deep scars and rhytides
Direct control over depth
Can treat a large area in one sitting
Can be combined with scar revision, peeling, electrosurgery, or radiosurgery

Disadvantages

Operator dependent, requires experience
Longer downtime and intensive wound care
Risk of pigmentary alteration, infection, and scarring
Deep ice-pick scars need additional procedures
Largely replaced by fractional lasers in many indications

One-line conclusion

Dermabrasion is an effective but technique-sensitive deep mechanical resurfacing procedure, mainly indicated for selected scars, rhinophyma, and perioral rhytides.The uploaded PDF is “Electrosurgery acsi.pdf”, but you asked for notes on dermabrasion.

Do you want short MD theory notes on electrosurgery from this PDF, or should I use a dermabrasion PDF instead?

Reading File

Electrosurgery

Definition

Electrosurgery is the use of high-frequency electrical current to produce heat in tissues for destruction, coagulation, haemostasis, or cutting. It is inexpensive, portable, and widely used in dermatology.

Electrosurgery versus electrocautery

Electrosurgery: Current passes through the patient and heat is generated within tissue.
Electrocautery: A heated metal tip transfers heat to tissue. No current passes through the patient. Hence, it is safer in patients with pacemakers/ICDs.

Types of electrosurgery

Modality	Current and technique	Main effect/use
Electrofulguration	High voltage, low amperage, damped AC. Electrode held 1-2 mm away, spark jumps through air.	Most superficial destruction. Warts, skin tags, superficial keratoses.
Electrodessication	High voltage, low amperage, damped AC. Electrode directly contacts tissue.	Tissue dehydration and superficial coagulation. Used for small benign lesions and haemostasis.
Electrocoagulation	Low voltage, high amperage, moderately damped AC; biteminal circuit.	Deeper coagulation and haemostasis.
Electrosection	Low voltage, high amperage, undamped/slightly damped AC.	Cutting with minimal lateral thermal injury; slightly damped current gives simultaneous haemostasis.
Electrocautery	Low-voltage, high-amperage DC heats a filament.	Protein coagulation and haemostasis; useful with pacemakers.
Electrolysis/electroepilation	Low-voltage, low-amperage DC.	Permanent hair removal. Sodium hydroxide at negative pole causes tissue liquefaction.

Remember:

Fulguration = no contact, most superficial.
Dessication = contact, deeper than fulguration.
Coagulation = deeper haemostasis.
Section = cutting.

Indications

Destruction of benign lesions

Acrochordons
Seborrhoeic keratoses
Viral warts
Syringomas
Dermatosis papulosa nigra
Small angiomas and telangiectasias
Xanthelasma
Epidermal nevus
Molluscum contagiosum

Other uses

Haemostasis during cutaneous surgery
Curettage and electrodessication of selected superficial BCC/SCC in situ
Electrosection of pedunculated lesions and rhinophyma
Permanent hair removal by electroepilation

Basic technique

Take history for bleeding tendency, allergy, pacemaker/ICD, cochlear implant, or other implanted electronic device.
Clean the field with non-alcoholic antiseptic or allow alcohol-based antiseptic to dry completely.
Local anaesthesia is usually given.
Select the correct electrode, waveform, and lowest effective power.
Apply short bursts of current to achieve the desired tissue effect.
For electrodesiccation, treat till tissue whitening/bubbling occurs; curette char if needed.
Maintain a dry field, particularly for superficial modalities.
Use sterile or disposable electrode tips.

Precautions

Use the lowest effective power and shortest duration to avoid deep thermal damage and scars.
Avoid alcohol pooling due to fire risk.
Remove jewellery near the operative area.
Use smoke evacuation, gloves, masks, and eye protection.
Surgical smoke may contain toxic chemicals and infectious particles, including HPV in wart plume.
Avoid treating excessively deep, especially on cosmetically sensitive areas.

In patients with pacemaker/ICD

Prefer electrocautery or bipolar device where possible.
Use short bursts, low power, and keep the current pathway away from the device.
Avoid activation directly over the device.
Obtain cardiology advice and monitoring for high-risk cases.

Complications

Pain, edema, erythema, crusting
Delayed healing
Hypopigmentation, hyperpigmentation
Scarring, atrophy, textural changes
Infection
Bleeding
Thermal burns due to poor grounding or inappropriate power setting
Fire due to alcohol-based preparations or oxygen-rich environment
Pacemaker/ICD interference
Smoke plume-related infection or toxic exposure

Conclusion

Electrosurgery is a versatile office procedure for lesion destruction, haemostasis, and cutting. Correct selection of waveform, electrode, power, and technique is essential to obtain good cosmetic results while preventing burns, scars, infection, and device interference.

Based primarily on the uploaded ACSI chapter “Electrosurgery,” pp. 245-253.

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