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A Randomized Control Trial Testing Connective Tissue Grafts vs. Allograft on Dental Implants

9. Februar 2017 aktualisiert von: University of Michigan

Implant Associated Soft Tissue Defects in the Anterior Maxilla: A Randomized Control Trial Between Subepithelial Connective Tissue Graft and Acellular Dermal Matrix Allograft

This randomized controlled clinical pilot trial compared the efficacy of two soft tissue grafting methods for correcting esthetic discrepancies associated with non-molar implants in the maxilla. Specifically, it was explored whether defects treated with connective tissue grafts (SCTG) differed in their outcomes from defects treated with acellular dermal matrix allografts (ADM).

Studienübersicht

Detaillierte Beschreibung

Thirteen patients who presented with implants displaying recession, thin biotype, concavity defects or a combination thereof associated with single crowned dental implants participated in this randomized control trial. The control group (N=7) received SCTG and the test group (N=6) received ADM, both under coronally positioned flaps. Data were collected before surgery, and 6 weeks, 3 months, and 6 months after the surgery. Outcome measures included soft tissue, hard tissue, and esthetics parameters and psychosocial data.

Studientyp

Interventionell

Einschreibung (Tatsächlich)

13

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

    • Michigan
      • Ann Arbor, Michigan, Vereinigte Staaten, 48109
        • University of Michigan

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre und älter (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Ja

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • Healthy adults of at least 18 years of age
  • Maxillary non-molar implant with failing pink esthetic profile
  • Implants with adjacent landmarks (only one can be an implant)
  • Healthy implants measured by the lack of peri-implantitis and mucositis
  • Good oral hygiene.

Exclusion Criteria:

  • Unstable systemic diseases, compromised immune system, or unstable bleeding disorders
  • History of radiation or cancer in the oral cavity
  • Use of IV bisphosphonate or steroid medication
  • Use of tobacco products (>1/2 pack per day)
  • Pregnancy
  • Mucogingival surgery or implant placement within the past six months

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Single

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Aktiver Komparator: Connective Tissue Graft - Control
The donor tissue was harvested from tissue palatal to maxillary premolars and anterior to the mesial of the first molars. A horizontal incision corresponding to the width of the recipient bed plus 4mm was made 3 mm apical to the gingival margin. A small secondary vertical incision was tolerated on the mesial aspect of the surgical site to allow for a split thickness technique. The flap was then positioned over the graft and sutured with attempts to cover the grafted tissue to 2mm coronal to the implant/abutment interface pending flap tension. Follow up was monitored over 6 months at various time-points.

All patients were treated with infiltration of local anesthetic with vasoconstrictor if noted tolerable by the medical history. Surgeons were then notified if the patient was randomized to the test or control according to a blinded treatment assignment. In both groups, anesthesia was confirmed at the implant site and the palatal donor site if indicated. The recipient bed was then prepared.

Vertical incisions were made at the defect at line angles and horizontal incisions connected the two vertical releases intrasulcularly without involving the interdental papilla. The flap was reflected as a full thickness flap maintaining the integrity of the collagen attachment with de-epithelialization of papilla to allow for coronal advancement.

Experimental: Alloderm - Test
ADM graft was prepared according to the manufacturer's instructions. The preparation requires rehydration in 50ml sterile saline or Ringers Solution for five minutes and repeated twice. The graft was then transferred to the recipient bed with the basement membrane side facing up and connective tissue on the periosteum. The allograft was trimmed to cover the defect dimensions up to the implant-abutment interface. There was a 4mm margin added to the width on each side to account for lateral contraction as with the connective tissue. With sterile moist gauze, pressure was applied to the graft for proper adaptation to the wound bed. The graft was sutured with a single sling and the flap with a double sling. Simple interrupted sutures were used to close vertical releases.

All patients were treated with infiltration of local anesthetic with vasoconstrictor if noted tolerable by the medical history. Surgeons were then notified if the patient was randomized to the test or control according to a blinded treatment assignment. In both groups, anesthesia was confirmed at the implant site and the palatal donor site if indicated. The recipient bed was then prepared.

Vertical incisions were made at the defect at line angles and horizontal incisions connected the two vertical releases intrasulcularly without involving the interdental papilla. The flap was reflected as a full thickness flap maintaining the integrity of the collagen attachment with de-epithelialization of papilla to allow for coronal advancement.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Recession Correction
Zeitfenster: 6 Months
Change in recession was recorded at baseline, 6 weeks, 3 months and 6 months after grafting.
6 Months

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Concavity Correction
Zeitfenster: 6 Months
At baseline, 6 weeks, 3 months, and 6 months after grafting, buccal concavities were measured.
6 Months

Andere Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Tissue Thickness
Zeitfenster: 6 Months
Tissue thickness was measured with a 25 endodontic file with rubber stopper at baseline, 6 weeks, 3 months and 6 months after grafting.
6 Months
Implant Esthetics
Zeitfenster: 6 Months
Implant esthetics were rated with written survey by both the subject and clinician.
6 Months
Psychosocial Data
Zeitfenster: 6 months
Subjects completed questionnaires regarding their quality of life during the study by written survey.
6 months

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Mitarbeiter

Ermittler

  • Studienstuhl: Hom-Lay Wang, DDS, MS, PhD, University of Michigan

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn

1. August 2009

Primärer Abschluss (Tatsächlich)

1. Mai 2012

Studienabschluss (Tatsächlich)

1. Juli 2012

Studienanmeldedaten

Zuerst eingereicht

29. August 2013

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

29. August 2013

Zuerst gepostet (Schätzen)

4. September 2013

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

10. Februar 2017

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

9. Februar 2017

Zuletzt verifiziert

1. Februar 2017

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • UM-Anderson-10

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