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970-nm Diode Laser Versus Liquid Nitrogen Cryotherapy in Maxillary Labial Frenectomy (MLF-DL-KRYO)

13 juillet 2026 mis à jour par: Kutahya Health Sciences University

Comparison of Salivary Cortisol Response and Early Postoperative Outcomes Following 970-nm Diode Laser and Liquid Nitrogen Cryotherapy in Maxillary Labial Frenectomy: A Randomized Single-Blind Clinical Trial

This prospective, randomized, single-blind, assessor-blinded, parallel-group clinical trial aims to compare the effects of 970-nm diode laser and liquid nitrogen cryotherapy in patients requiring maxillary labial frenectomy.

The primary objective is to compare the change in salivary cortisol levels from baseline to postoperative day 2 between the two treatment groups. Secondary objectives include comparison of postoperative pain, edema, interincisal mouth opening, analgesic consumption, operation duration, state anxiety, clinical wound healing, and adverse events.

Eligible adult patients with an indication for maxillary labial frenectomy will be randomly assigned to receive either 970-nm diode laser frenectomy or liquid nitrogen cryotherapy. Salivary cortisol samples and clinical outcomes will be assessed during the early postoperative follow-up period.

Aperçu de l'étude

Statut

Pas encore de recrutement

Les conditions

Intervention / Traitement

Description détaillée

Maxillary labial frenulum abnormalities may be associated with diastema, plaque accumulation, periodontal irritation, gingival recession, oral hygiene difficulty, functional discomfort, and esthetic concerns. Frenectomy may be indicated when the frenulum is hypertrophic, short, thick, or inserted close to the interdental papilla.

Conventional scalpel frenectomy is effective but may be associated with intraoperative bleeding, need for suturing, postoperative pain, edema, and reduced patient comfort. Minimally invasive approaches such as diode laser surgery and cryotherapy may offer potential advantages in oral soft tissue procedures.

This study will compare two minimally invasive approaches for maxillary labial frenectomy: 970-nm diode laser and liquid nitrogen cryotherapy. Participants will be randomized into two parallel groups. In the diode laser group, frenectomy will be performed using a 970-nm diode laser at 2 W in continuous wave mode with a 320-micrometer sterile fiber tip using a contact technique. In the liquid nitrogen cryotherapy group, open-spray cryotherapy will be applied to the maxillary labial frenulum region with two freeze-thaw cycles.

The primary endpoint is the change in salivary cortisol level from baseline to postoperative day 2. Secondary endpoints include postoperative day 7 salivary cortisol change, postoperative pain measured by visual analog scale, edema, interincisal mouth opening, total analgesic consumption, operation duration, State-Trait Anxiety Inventory-State score, Landry, Turnbull and Howley wound healing index scores, and postoperative complications or adverse events.

All procedures and salivary sampling will be standardized and performed in the morning to reduce the influence of circadian variation on cortisol measurements. The study will be conducted at the Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Kutahya Health Sciences University.

Type d'étude

Interventionnel

Inscription (Estimé)

40

Phase

  • N'est pas applicable

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

Lieux d'étude

  • Turquie (Türkiye)
    • Kütahya
      • Kütahya, Kütahya, Turquie (Türkiye), 43020
        • Kütahya Health Sciences University Faculty of Dentistry
        • Contact:
        • Contact:
        • Chercheur principal:
          • Muhammet Yasin Pektaş, Asst. Prof., DDS

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

  • Adulte
  • Adulte plus âgé

Accepte les volontaires sains

Non

La description

Inclusion Criteria:

  • Age between 18 and 65 years.
  • Systemically healthy, ASA I status.
  • Clinical indication for maxillary labial frenectomy.
  • Ability to attend postoperative follow-up visits.
  • Provision of written informed consent.

Exclusion Criteria:

  • Systemic or local corticosteroid use within the last 6 months.
  • Endocrine disease that may affect cortisol levels.
  • Pregnancy or lactation.
  • Active oral infection.
  • Chronic analgesic or anti-inflammatory drug use.
  • Psychiatric medication use.
  • Smoking.
  • ASA II or higher systemic status.
  • Inability to attend follow-up visits.
  • Refusal to participate in the study.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Traitement
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation parallèle
  • Masquage: Seul

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: 970-nm Diode Laser Frenectomy
Participants randomized to this arm will undergo maxillary labial frenectomy using a 970-nm diode laser. The procedure will be performed with a SiroLaser Advance device at 970 nm wavelength, 2 W power, continuous wave mode, and a 320-micrometer sterile fiber tip using a contact technique. The total laser application time will be standardized as 2 minutes. The surgical area will not be sutured and will be left to heal by secondary intention.
Procédure: 970-nm Diode Laser Frenectomy
Maxillary labial frenectomy will be performed using a 970-nm diode laser device at 2 W power in continuous wave mode with a 320-micrometer sterile fiber tip using a contact technique. The total laser application time will be standardized as 2 minutes. The surgical area will not be sutured and will be left to heal by secondary intention.
Autres noms:
  • Diode laser frenectomy
Expérimental: Liquid Nitrogen Cryotherapy
Participants randomized to this arm will receive liquid nitrogen cryotherapy applied to the maxillary labial frenulum region using an open-spray technique. Two freeze-thaw cycles will be performed; each freezing cycle will last 15 seconds, with passive complete thawing between cycles. No mechanical excision will be performed after cryotherapy. The target tissue is expected to be eliminated through cryogenic necrosis and secondary healing. The surgical area will not be sutured.
Procédure: Liquid Nitrogen Cryotherapy
Liquid nitrogen cryotherapy will be applied to the maxillary labial frenulum region using an open-spray technique. Two freeze-thaw cycles will be performed; each freezing cycle will last 15 seconds, with passive complete thawing between cycles. No mechanical excision will be performed after cryotherapy, and the surgical area will not be sutured.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Change in salivary cortisol level from baseline to postoperative day 2
Délai: Baseline and postoperative day 2
Salivary cortisol will be measured in unstimulated saliva samples using an ELISA method. For each participant, the change in salivary cortisol level from the preoperative baseline measurement to postoperative day 2 will be calculated and compared between the two intervention groups. Results will be recorded in nmol/L.
Baseline and postoperative day 2

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Change in salivary cortisol level from baseline to postoperative day 7
Délai: Baseline and postoperative day 7
Salivary cortisol will be measured in unstimulated saliva samples using an ELISA method. For each participant, the change in salivary cortisol level from the preoperative baseline measurement to postoperative day 7 will be calculated and compared between the two intervention groups. Results will be recorded in nmol/L.
Baseline and postoperative day 7
Change in postoperative edema
Délai: Baseline, postoperative day 2, and postoperative day 7
Postoperative edema will be assessed using standardized facial measurements. Changes in edema measurements from baseline to postoperative day 2 and postoperative day 7 will be calculated and compared between the two intervention groups.
Baseline, postoperative day 2, and postoperative day 7
Postoperative pain intensity
Délai: Postoperative 6 hours, 12 hours, 24 hours, day 2, and day 7
Postoperative pain intensity will be assessed using a 0-to-10 visual analog scale, where higher scores indicate greater pain intensity.
Postoperative 6 hours, 12 hours, 24 hours, day 2, and day 7
Change in interincisal mouth opening
Délai: Baseline, postoperative day 2, and postoperative day 7
Interincisal mouth opening will be measured in millimeters. Changes from baseline to postoperative day 2 and postoperative day 7 will be calculated and compared between the two intervention groups.
Baseline, postoperative day 2, and postoperative day 7
Total analgesic consumption during the first postoperative week
Délai: Postoperative days 0 to 7
Analgesic consumption will be recorded as the total number of analgesic tablets used by each participant during the first postoperative week.
Postoperative days 0 to 7
Operation duration
Délai: During the intervention procedure
Operation duration will be recorded in minutes for each participant and compared between the two intervention groups.
During the intervention procedure
State anxiety score
Délai: Baseline, postoperative day 2, and postoperative day 7
State anxiety will be assessed using the State-Trait Anxiety Inventory-State form. Total scores will be recorded preoperatively and on postoperative days 2 and 7, and compared between the two intervention groups.
Baseline, postoperative day 2, and postoperative day 7
Clinical wound healing score
Délai: Postoperative days 2, 7, 14, and 21
Clinical wound healing will be assessed using the Landry, Turnbull and Howley Wound Healing Index. Wound healing scores will be recorded on postoperative days 2, 7, 14, and 21 and compared between the two intervention groups.
Postoperative days 2, 7, 14, and 21
Postoperative complications and adverse events
Délai: From the intervention procedure through postoperative day 21
The occurrence of postoperative complications or adverse events, including unexpected pain, bleeding, infection, wound healing problems, or other procedure-related adverse events, will be recorded during the follow-up period.
From the intervention procedure through postoperative day 21

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Kutahya Health Sciences University

Les enquêteurs

  • Chercheur principal: Muhammet Yasin Pektaş, Asst. Prof, DDS, Kutahya Health Sciences University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Publications générales

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Estimé)

30 juillet 2026

Achèvement primaire (Estimé)

2 mai 2027

Achèvement de l'étude (Estimé)

21 mai 2027

Dates d'inscription aux études

Première soumission

13 juillet 2026

Première soumission répondant aux critères de contrôle qualité

13 juillet 2026

Première publication (Réel)

16 juillet 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

16 juillet 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

13 juillet 2026

Dernière vérification

1 juillet 2026

Plus d'information

Termes liés à cette étude

Mots clés

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • MLF-DL-KRYO-2026-01

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

NON

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

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