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Poly-L-Lactic Acid Threads Versus Platelet-Rich Plasma for Post-Traumatic Atrophic Scars (PLLA-PRP PTAS)

15. august 2026 opdateret af: Nesrin Sabry, Tanta University

A Comparative Study of Poly-L-Lactic Acid Threads Versus Platelet-Rich Plasma, Both Combined With Subcision, in the Treatment of Post-Traumatic Atrophic Scars

This study compares the efficacy and safety of poly-L-lactic acid (PLLA) threads versus platelet-rich plasma (PRP), both combined with subcision, in the treatment of post-traumatic atrophic scars. Patients with post-traumatic atrophic scars were allocated to either a single session of subcision followed by PLLA thread insertion or four monthly sessions of subcision combined with PRP injection. Clinical improvement, patient satisfaction, adverse effects, and histopathological changes were assessed during a 3-month follow-up period.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Post-traumatic atrophic scars result from abnormal healing following skin injury and may cause significant cosmetic and functional impairment. Subcision releases the fibrous bands tethering the scar to deeper tissues and may improve the response to additional treatments. PLLA threads are biodegradable materials that can stimulate collagen production, while PRP contains concentrated platelets and growth factors that may enhance tissue repair and remodeling.

This comparative study was conducted at the Dermatology and Venereology Department, Tanta University Hospital. Patients diagnosed with post-traumatic atrophic scars for at least one year and who had not received treatment during the preceding six months were enrolled. Patients with keloids, immunosuppression, coagulative or thrombophilic disorders, or chronic diseases were excluded.

Participants were divided into two equal treatment groups. Group A received a single session of subcision followed by insertion of poly-L-lactic acid threads. Group B received subcision combined with PRP injection for four sessions at one-month intervals. Clinical photographs were obtained before treatment and three months after treatment. Clinical improvement was assessed by two blinded dermatologists using the Global Aesthetic Improvement Scale, while patient satisfaction and treatment-related complaints or adverse effects were also recorded.

Skin biopsies were obtained from six patients before treatment and three months after treatment and evaluated using hematoxylin and eosin and trichrome staining to assess histopathological changes. All patients were followed for three months.

The study was approved by the Research Ethics Committee of the Faculty of Medicine, Tanta University, with approval number 32889/01/19, and informed consent was obtained from all participants.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

48

Fase

  • Ikke anvendelig

Kontakter og lokationer

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Studiesteder

      • Tanta, Egypten
        • Tanta University Hospitals

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Barn
  • Voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Patients with post-traumatic atrophic scars. Scar duration of at least 1 year. No treatment received during the previous 6 months.

Exclusion Criteria:

  • Keloids Immunosuppression Coagulative disorders Thrombophilic disorders Any chronic diseases

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Aktiv komparator: subcision and PLLA threads
subcision and PLLA threads' insertion at the same session
subcision and PLLA threads' insertion at the same session
Aktiv komparator: PRP and subcision (PRP-S) injection
PRP and subcision (PRP-S) injection monthly for four sessions
PRP and subcision (PRP-S) injection monthly for four sessions

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Global Aesthetic Improvement Scale (GAIS) score
Tidsramme: 3 months after treatment
Clinical improvement of post-traumatic atrophic scars was assessed using the Global Aesthetic Improvement Scale by two dermatologists blinded to the treatment group. The scale was graded from 1 to 4: Grade 1 = mild/no improvement (0-25%), Grade 2 = moderate improvement (26-50%), Grade 3 = marked improvement (51-75%), and Grade 4 = excellent improvement (>75%).
3 months after treatment

Samarbejdspartnere og efterforskere

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Sponsor

Datoer for undersøgelser

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Studer store datoer

Studiestart (Faktiske)

6. februar 2023

Primær færdiggørelse (Faktiske)

21. august 2023

Studieafslutning (Faktiske)

31. august 2024

Datoer for studieregistrering

Først indsendt

15. august 2026

Først indsendt, der opfyldte QC-kriterier

15. august 2026

Først opslået (Faktiske)

20. august 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

20. august 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. august 2026

Sidst verificeret

1. august 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 32889/01/19

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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