Cannula-based Versus Needle-based Subcision for Posttraumatic Atrophic Facial Scars

Study Overview
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Brief Summary
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This study aims to evaluate the effectiveness of cannula- based subcision versus common needle subcision in treatment of posttraumatic atrophic facial scars

Detailed Description
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In addition to cosmetic issues, atrophic scars can lead to psychological issues like social isolation, low self-esteem, and embarrassment. Subcision (Subcutaneous incision-less surgery) has been used for years to treat a variety of skin depressions, including atrophic acne scars and other depressed scars. Numerous modifications have been made throughout time to this surgical method to make it easier and more efficient. Although needle subcision is a straightforward, simple, useful, and practical procedure, it has many side effects and the overall success in this procedure is mild to moderate. So, in this study we evaluated the effectiveness of cannula- based subcision versus common needle subcision in treatment of posttraumatic atrophic facial scars.

Official Title
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Cannula-based Versus Common Needle-based Subcision in the Treatment of Posttraumatic Atrophic Facial Scars: A Clinical Trial

Conditions
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Scar; Atrophy

Intervention / Treatment
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* Procedure: cannula- based subcision
* Procedure: common- needle based subcision


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult Patients (> 20-years old) with posttraumatic facial scar Exclusion Criteria: other types of scars (e.g; postacne scars), pregnancy, lactation, bleeding or coagulation disorders, liability for keloid formation, history of kobnerization, and patients with systemic diseases (cardiac, chronic renal diseases, chronic liver diseases, asthma and hypertension) at the time of recruitment.

Ages Eligible for Study
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Minimum Age: 20 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Each scar was split into two equal halves; the upper right half were treated using a cannula- based subcision approach, while the lower left half was treated using a common needle-based procedure
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Cannula arm<br>the cannula's 18 gauge tip was pointed upward and approximately parallel to the skin's surface when it was put into the superficial dermis, 1-2 millimeters away from the targeted scar. In order to completely remove fibrous tissue from the superficial dermis, a lancing motion (linear inserting-withdrawing needle action) was utilized first. | Procedure: cannula- based subcision<br>* Insertion of a needle into the base of a cutaneous scar to cut fibrous tissue and help new collagen formation.<br>|
| Active Comparator: Needle arm<br>The needle's 27 gauge tip was pointed upward and approximately parallel to the skin's surface when it was put into the superficial dermis, 1-2 millimeters away from the targeted scar. In order to completely remove fibrous tissue from the superficial dermis, a lancing motion (linear inserting-withdrawing needle action) was utilized first. | Procedure: common- needle based subcision<br>* Insertion of a cannula into the base of a cutaneous scar to cut fibrous tissue and help new collagen formation.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Vancouver scar scale (VSS) | The (VSS) examines vascularity, pliability, pigmentation, and height, yielding a total score that ranges from 0 to 14. The original rating system was as follows: Vascularity (0=normal, 1=pink, 2=red, 3=purple), Pliability (Normal=0, Flat=0, Supple=1, Yielding=2, Firm=3, Ropes=4, Contracture=5), Pigmentation (0=normal, 1=hypo-pigmentation, 2=mixed pigmentation, 3=hyper-pigmentation), and Height (Flat=0 <2 mm=1 2-5 mm=2 >5 mm=2) . | 4 months |