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Effect of Redon-type Drains on Postoperative Edema Following Mandibular Orthognathic Surgery: a Randomized, Controlled Superiority Trial With Two Parallel Arms (DPO - OM)

11 november 2026 uppdaterad av: University Hospital, Tours

Orthognathic surgery involves the maxillary and/or mandibular skeletal bases; it entails maxillary and/or mandibular osteotomies (such as sagittal split osteotomies of the mandibular rami) aimed at restoring normal maxillomandibular skeletal and dento-occlusal relationships in patients with maxillomandibular dysmorphosis. These deformities give rise to morphological, aesthetic, and functional abnormalities that can be severe (e.g., respiratory issues, temporomandibular joint pain). Postoperative edema is inevitable following orthognathic surgery; it can be significant, causing pain and discomfort while delaying patient recovery and hospital discharge. The use of Redon-type drains for mandibular osteotomies is not a standard practice across surgical teams due to a lack of consensus. The only available data come from studies with methodologies that do not allow for a definitive conclusion regarding the superiority of using-or not using-postoperative Redon drains (Lee et al. 2020), and no clinical trials have investigated this issue. This project aims to evaluate the impact of Redon-type drainage in mandibular osteotomies (sagittal split osteotomies of the mandibular rami), whether or not combined with genioplasty (osteotomy of the mental symphysis). We hypothesize that drainage using Redon-type drains for 6 hours in the immediate postoperative period following mandibular osteotomies significantly reduces postoperative edema.

The primary objective of this clinical trial is to demonstrate the superiority-in terms of reducing postoperative edema at day 2-of placing Redon-type drains for 6 hours immediately following sagittal split osteotomy of the mandibular rami (in addition to standard postoperative care) compared to standard postoperative care alone, without a drainage device.

Hypothesis: Demonstrating that the use of Redon-type drains following orthognathic surgery osteotomies reduces postoperative edema, pain, and discomfort would provide a rational basis for this practice and support its routine implementation. The expected benefits are twofold, impacting both patients and public health. For patients, the anticipated benefits include reduced postoperative discomfort and pain, faster recovery, and shorter hospital stays, with the future prospect of outpatient care.

Studieöversikt

Studietyp

Interventionell

Inskrivning (Beräknad)

72

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

Studieorter

      • Angers, Frankrike
        • Chu Angers
      • Nantes, Frankrike
        • Chu Nantes

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

15 år och äldre (Barn, Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion criteria:

  • Patients aged 15 years or older

  • Undergoing mandibular osteotomies, with or without genioplasty, with or without wisdom tooth extraction (maxillary and/or mandibular)

  • Informed consent obtained from the adult patient, or from the holder(s) of parental authority if the patient is a minor*

  • Enrolled in a French social security program

    • When both holders of parental authority cannot give joint consent, the consent of a single legal representative may be obtained in situations provided for by regulations or duly justified and documented in the source file.

Exclusion Criteria:

  • History of maxillomandibular bone surgery
  • Coagulation disorder
  • Thrombophilia
  • Patients on anticoagulants or antiplatelet agents
  • Patients with a constitutional bone disorder
  • Patients with a syndromic craniofacial malformation
  • Absolute or relative contraindications to treatment with corticosteroids
  • Pregnant (urine test) or breastfeeding women
  • Patients under legal guardianship, conservatorship, or judicial protection
  • Contraindications to the procedure
  • Patients who have taken corticosteroids or NSAIDs on the day before the procedure (D-1).

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Förebyggande
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: experimental arm

with drains placed at the end of the procedure, in addition to standard postoperative care. These will be Redon drains with an outlet that is either intraoral or transcutaneous in the cervical region, depending on the participating center's practices (intraoral transmucosal in the Tours and Angers centers or transcutaneous in the Nantes center); these drains will be removed 6 hours after placement

Translated with DeepL.com (free version)

in which drains are placed at the end of the procedure, in addition to standard postoperative care.

Aktiv komparator: control arm

which consists of not placing any drainage device immediately after surgery, with standard postoperative care identical to that of the experimental group.

not placing any drainage device immediately after surgery, with standard postoperative care identical

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Postoperative swelling
Tidsram: Cervicofacial linear measurement will be collected 48 hours after the randomization (day 2) and at month 3. As the facial skeletal anatomy will be modified by the surgical procedure, month 3 will be considered as the baseline measurement.

The primary outcome will be the post operative facial swelling 48 hours after the end of the surgical procedure (randomization will be at this timepoint) measured with cervicofacial linear measurements

Cervicofacial linear measurement will be collected 48 hours after the randomization (day 2) and at month 3. As the facial skeletal anatomy will be modified by the surgical procedure, month 3 will be considered as the baseline measurement.

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Postoperative swelling
Tidsram: Cervicofacial linear measurement will be collected at 6 hours after randomization, 24 hours after randomization (day 1) and at day 7

Postoperative swelling at other time points than for the primary outcome, measured with cervico facial linear measurements

Cervicofacial linear measurement will be collected at 6 hours after randomization, 24 hours after randomization (day 1) and at day 7
Postoperative swelling
Tidsram: It will be collected 24 hours after randomization (day 1) , at day 2, at day 7 and at month 3

Postoperative swelling using 3D photogrammetry instead of cervicofacial linear measurements

It will be collected 24 hours after randomization (day 1) , at day 2, at day 7 and at month 3
Pain intensity
Tidsram: Pain will be collected 6 hours after randomization, at day 1 (24 hours after randomization), at day 2 and at day 7

Pain will be measured using a visual analog scale where 0 corresponds to no pain and 10 to unbearable pain

Pain will be collected 6 hours after randomization, at day 1 (24 hours after randomization), at day 2 and at day 7
Aesthetic discomfort
Tidsram: It will be collected 6 hours after randomization, at day 1 (24 hours after randomization), at day 2 and at day 7

Aesthetic discomfort will be measured using a visual analog scale with 0 indicating no discomfort and 10 corresponding to an extremely uncomfortable feeling

It will be collected 6 hours after randomization, at day 1 (24 hours after randomization), at day 2 and at day 7
Breathing discomfort
Tidsram: It will be collected 6 hours after randomization, at day 1 (24 hours after randomization), at day 2 and at day 7

Breathing discomfort will be measured using a visual analog scale where 0 corresponds to no discomfort and 10 to extremely bothersome

It will be collected 6 hours after randomization, at day 1 (24 hours after randomization), at day 2 and at day 7
Swallowing discomfort
Tidsram: It will be collected 6 hours after randomization, at day 1 (24 hours after randomization), at day 2 and at day 7

Swallowing discomfort will be measured using a visual analog scale where 0 corresponds to no discomfort and 10 to extremely bothersome

It will be collected 6 hours after randomization, at day 1 (24 hours after randomization), at day 2 and at day 7
Pain during redon drain removal
Tidsram: It will be collected 6 hours after randomization, at time to redon removal.

Pain during redon drain removal will be collected for participants of the experimental group after redon drain removal

It will be collected 6 hours after randomization, at time to redon removal.
The daily bed rest in hours
Tidsram: It will be collected at day 1 and at day 2 (how long the participant stay in his bed in the last 24 hours) as well as at day 7 (how long the participants stay in his bed each day of the last 4 days).

It corresponds to how long, in hours, the participant stays in his bed each day.

It will be collected at day 1 and at day 2 (how long the participant stay in his bed in the last 24 hours) as well as at day 7 (how long the participants stay in his bed each day of the last 4 days).
The general well-being
Tidsram: It will be collected at day 7 and at month 3

General well-being will be assessed using the GHQ-28 self-assessment questionnaire. The GHQ-28 is a questionnaire with 28 items and with scores ranging from 0 - indicating no deterioration in well-being - to 84 - indicating a significant deterioration in well-being.

It will be collected at day 7 and at month 3
The length of hospital stay
Tidsram: a maximum of 90 days

It corresponds to the lenght of the hospital stay, in days (a maximum of 90 days)

a maximum of 90 days
Postoperative adverse events
Tidsram: Throughout the three-month follow-up period, whenever an adverse event occurs

Postoperative adverse events correspond to hematoma, pre-thoracic hematoma spread, and infection

Throughout the three-month follow-up period, whenever an adverse event occurs

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Utredare

  • Studierektor: Anne MORICE, Dr, University Hospital, Tours

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Beräknad)

30 december 2026

Primärt slutförande (Beräknad)

30 december 2029

Avslutad studie (Beräknad)

28 mars 2030

Studieregistreringsdatum

Först inskickad

6 oktober 2026

Först inskickad som uppfyllde QC-kriterierna

11 november 2026

Första postat (Faktisk)

12 november 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

12 november 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

11 november 2026

Senast verifierad

1 november 2026

Mer information

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