Hair Regrowth After Bicoronal Incision

Study Overview
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Brief Summary
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Loss of hair growth potential in long surgical scalp incisions can become obvious to the patient and others, given hair's tendency to part along the resulting scar. Bevelling incisions perpendicular to the hair follicle angle may increase hair growth through the scar. However, many factors may be confounders such as wound tension and cauterizing the incision. This study will investigate the effect a bevelled incision has on hair growth preservation compared to a standard incision that incises the skin perpendicular to its surface irrespective of hair follicle angles. Following informed voluntary consent, subjects who require bi-coronal scalp incisions as part of a surgical plan will be enrolled. The right side of this bilateral incision will be randomized to receive either a bevelled or a standard incision and the left side will receive the opposite type. During routine surgical follow-up the hair growth within the scar of the two sides will be recorded for comparison and it is our hypothesis that the side with the bevelled incision will have more hair within the scar.

Official Title
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A Randomized Blinded Comparison of Hair Growth Following Either Bevelled or Standard Bi-coronal Scalp Incisions.

Conditions
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Alopecia

Intervention / Treatment
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* Procedure: Straight Incision
* Procedure: Bevelled Incision


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Bicoronal Incision required as part of surgical plan Incision within hair-bearing scalp Exclusion Criteria: Previous Bicoronal Incision Unfit for Surgery Unable to provide informed consent Unable to comply with followup Preexisting alopecia of scalp Cutaneous malignancy of scalp

Ages Eligible for Study
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Minimum Age: 18 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: Prevention
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Straight Incision<br>incision made perpendicular to scalp surface | Procedure: Straight Incision<br>* The incision will be made at a 90 degree angle to the surface of the scalp<br>|
| Active Comparator: Bevelled Incision<br>Incision made at 45 degrees to scalp surface | Procedure: Bevelled Incision<br>* The Incision will be made at a 45 degree angle to the surface of the scalp.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Hair Regrowth Within the Scar | Hair growth through the scar will be counted at 6 and 12 month followup | 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Scar Characteristics | Scars will be rated based on the Vancouver Scar Scale (Sullivan, 1990) | 1 year post surgery | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Alopecia, Coronal Incision, Scar Quality