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Comparison of Autologous Tooth and Bovine Xenograft in Periodontal Healing After Mandibular Third Molar Extraction

11. september 2026 opdateret af: Miguel Ruiz Rincón, Universidad Complutense de Madrid

Evaluation of Changes in Probing Depth Following Surgical Extraction of Mandibular Third Molars Using Particulated Autologous Tooth vs. Particulated Bovine Xenograft vs. Blood Clot: A Randomized Clinical Trial

This study investigates the healing of periodontal defects on the distal surface of the second lower molars after the surgical extraction of impacted third molars. Specifically, it compares the effectiveness of autologous tooth graft particles (derived from the extracted third molar) with bovine xenograft particles, using blood clot healing as a control.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

This study investigates the healing of periodontal defects on the distal surface of the second lower molars after the surgical extraction of impacted third molars. Specifically, it compares the effectiveness of autologous tooth graft particles (derived from the extracted third molar) with bovine xenograft particles, using blood clot healing as a control.

Lower third molars are the most frequently impacted teeth, and their extraction can sometimes lead to or worsen periodontal defects on the adjacent second molar. Previous studies have shown positive outcomes using various bone regeneration materials; however, autologous tooth grafts have recently emerged as a biocompatible, osteoconductive, and osteoinductive alternative with promising results. Despite this, there are no clinical studies directly comparing autologous tooth grafts and bovine xenografts in this context-justifying the present research.

A prospective, randomized split-mouth clinical trial with three arms will be conducted at the Complutense University of Madrid. Each patient will undergo bilateral lower third molar extractions under three conditions:

Group A (Test 1): socket filled with autologous tooth graft,

Group B (Test 2): socket filled with bovine xenograft,

Group C (Control): socket left to heal naturally with a blood clot.

The main objective is to evaluate the reduction in probing depth on the distal surface of the second molar six months post-extraction.

Secondary outcomes include postoperative pain, inflammation, trismus, complications, wound healing, and patient-reported outcomes (PoSSe questionnaire).

Approximately 30 patients will be included, with triple randomization (side of first extraction, use of graft, and graft type). Clinical and radiographic evaluations will be performed preoperatively, and follow-ups will occur at 48 hours, one week, three months, and six months.

The null hypothesis (H₀) states that there will be no periodontal differences between the two graft materials, while the alternative hypothesis (H₁) proposes superior periodontal outcomes with the autologous tooth graft compared to the bovine xenograft.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

30

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

  • Navn: Miguel Ruiz Rincón, DDS
  • Telefonnummer: +34 680276072
  • E-mail: migrui02@ucm.es

Studiesteder

    • Madrid
      • Madrid, Madrid, Spanien, 28040
        • Rekruttering
        • Postgrado de especialización en cirugía bucal e implantología, Facultad de Odontología, Universidad Complutense de Madrid
        • Kontakt:
          • Miguel Ruiz Rincón, DDS
          • Telefonnummer: +34 680 27 60 72
          • E-mail: migrui02@ucm.es

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

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • Adults (≥18 years old) of any sex, able to understand and follow study instructions.
  • Patients requiring bilateral surgical extraction of impacted lower third molars in horizontal or mesioangular position.
  • Presence of both lower second molars.
  • Classified as ASA I or ASA II (according to the American Society of Anesthesiologists).
  • Willingness to participate voluntarily and sign informed consent.

Exclusion Criteria:

  • Age under 18 years.
  • ASA physical status III, IV, V, or VI.
  • Pregnant or breastfeeding women.
  • Immunosuppressed patients.
  • Current treatment with NSAIDs, anticoagulants, or acetylsalicylic acid.
  • Previous or current treatment with bisphosphonates.
  • Presence of oral dysplasia or precancerous lesions.

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: Crossover opgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Autologous Tooth Graft (Test 1)
After surgical extraction of the impacted lower third molar, the socket will be filled with autologous tooth graft particles obtained from the extracted tooth using the Smart Dentin Grinder®. The graft particles (300-1200 µm) will be decontaminated, rinsed, and placed on the distal surface of the second molar. The graft will be covered with a resorbable hemostatic sponge (Roeko Gelatamp®) before suturing.
Autologous tooth graft particles are prepared from the extracted third molar using the Smart Dentin Grinder®. The tooth is cleaned, dried, and ground to particles of 300-1200 µm, decontaminated with 0.5 M sodium hydroxide and 20% ethanol, rinsed with sterile saline, and placed on the distal surface of the second molar. The graft is covered with a resorbable hemostatic sponge (Roeko Gelatamp®) prior to wound closure.
Andre navne:
  • Smart Dentin Grinder®
Aktiv komparator: Bovine Xenograft (Test 2)
After extraction of the impacted lower third molar, the socket will be filled with particulate bovine xenograft (InterOss®) hydrated in sterile saline. The material will be placed on the distal surface of the second molar and covered with a resorbable hemostatic sponge before suturing.
Autologous tooth graft particles are prepared from the extracted third molar using the Smart Dentin Grinder®. The tooth is cleaned, dried, and ground to particles of 300-1200 µm, decontaminated with 0.5 M sodium hydroxide and 20% ethanol, rinsed with sterile saline, and placed on the distal surface of the second molar. The graft is covered with a resorbable hemostatic sponge (Roeko Gelatamp®) prior to wound closure.
Andre navne:
  • Smart Dentin Grinder®
Ingen indgriben: Blood Clot (Control)
Following extraction of the impacted lower third molar, the socket will be left to heal naturally through blood clot formation, without placement of any graft material or hemostatic sponge. Standard wound closure and postoperative care will be provided.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Reduction in probing depth on the distal surface of the mandibular second molar
Tidsramme: Baseline (preoperative), 3 months, and 6 months post-extraction
Periodontal probing depth (in millimeters) measured on the distal surface of the lower second molar using a calibrated periodontal probe (CP12). The reduction in probing depth will be compared among the three groups (autologous tooth graft, bovine xenograft, and blood clot control) to evaluate periodontal healing following extraction of the lower third molars.
Baseline (preoperative), 3 months, and 6 months post-extraction

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Postoperative swelling
Tidsramme: Preoperative, 48 hours, and 7 days post-extraction
Facial swelling measured as the linear distance between anatomical landmarks (tragus-commissure, tragus-gonion, and gonion-commissure) using a suture thread and caliper.
Preoperative, 48 hours, and 7 days post-extraction
Postoperative trismus
Tidsramme: Preoperative, 48 hours, and 7 days post-extraction
Maximum interincisal mouth opening measured in millimeters using a caliper.
Preoperative, 48 hours, and 7 days post-extraction
Wound healing quality
Tidsramme: 48 hours, and 7 days post-extraction
linical evaluation of the surgical site according to Blum's criteria (good, acceptable, poor), based on mucosal color, bleeding, wound margins, and closure.
48 hours, and 7 days post-extraction
Patient-reported quality of life
Tidsramme: 7 days post-extraction
Assessed using the Postoperative Symptom Severity (PoSSe) scale, covering pain, function, daily activities, and social interaction after surgery.
7 days post-extraction

Andre resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Surgical time
Tidsramme: Intraoperatively
Minutes and seconds recorded intraoperatively
Intraoperatively
Surgical difficulty
Tidsramme: Intraoperatively
Classified according to the modified Parant scale: Types I-IV
Intraoperatively

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Efterforskere

  • Studieleder: José María Martínez-González, MD,DMD,PhD,MDV, Department of Dental Clinical Specialties, Faculty of Dentistry, Complutense University of Madrid

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. september 2025

Primær færdiggørelse (Anslået)

30. september 2026

Studieafslutning (Anslået)

30. september 2026

Datoer for studieregistrering

Først indsendt

11. september 2026

Først indsendt, der opfyldte QC-kriterier

11. september 2026

Først opslået (Faktiske)

17. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

17. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

11. september 2026

Sidst verificeret

1. oktober 2025

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 25/636-EC_X

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

Individual participant data (IPD) from this study will be shared with qualified researchers after the publication of primary results. Shared data will include anonymized measurements of periodontal probing depth, postoperative outcomes (pain, swelling, trismus), PoSSe questionnaire responses, and relevant demographic and clinical variables. Data will be de-identified to protect participant confidentiality.

IPD-delingstidsramme

IPD will be available beginning 6 months after publication of the primary study results and will remain accessible for 5 years.

IPD-delingsadgangskriterier

Data will be available to researchers who submit a written request describing the purpose of the analysis and who agree to a data use agreement ensuring confidentiality and appropriate use. Requests will be reviewed by the Principal Investigator or designated study committee.

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • ANALYTIC_CODE
  • CSR

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