NDLI: Comparison of two resorbable membrane systems in bone regeneration after removal of wisdom teeth: a randomized-controlled clinical pilot study.

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Comparison of two resorbable membrane systems in bone regeneration after removal of wisdom teeth: a randomized-controlled clinical pilot study.

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Comparison of two resorbable membrane systems in bone regeneration after removal of wisdom teeth: a randomized-controlled clinical pilot study.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zwahlen, Roger A. Cheung, Lim K. Zheng, Li-Wu Chow, Raymond L. K. Li, Thomas Schuknecht, Bernhard Grätz, Klaus W. Weber, Franz E.
Description	Author Affiliation: Zwahlen RA ( Department of Oral & Maxillofacial Surgery, Prince Philip Dental Hospital & Queen Mary Hospital, University of Hong Kong, Hong Kong, SAR. zwahlen@hku.hk)
Abstract	OBJECTIVES: To compare the performance and safety of Inion GTR(TM) Biodegradable Membrane System and Geistlich resorbable bilayer Bio-Gide((R)) membrane in human bone regeneration. MATERIAL AND METHODS: In a multicenter, split blind, comparative, randomized, prospective, pilot study 15 patients have been randomized at surgery whether to be treated either with Inion GTR(TM) Biodegradable Membrane System on one and Geistlich resorbable bilayer Bio-Gide((R)) membrane on the other side or vice versa after surgical removal of both fully impacted wisdom teeth. During the follow-up visits at week 1, 2 and 6 and at months 3 and 6 the general state, the wound, eventual adverse events and the medication of the patients were assessed. Computed Tomography (CT) scans were performed immediately and 3 months after the surgery, before biopsy collection. Semi-quantitative histological evaluation and histomorphometric analyses were performed according to the ISO 10993-6 standard. New bone formation and membrane integration were evaluated by CT scan measurements. Tissue healing was evaluated clinically and by photographs between the time on teeth extraction and during follow ups. RESULTS: Five patients were smokers, none drank alcohol. Mild adverse events like wound infection, haematoma or late swelling of the gums occurred in three patients. The trephine bur harvest of bone biopsies under local anaesthesia was uneventful. Whereas specimens from the sites treated with the Inion membrane yielded 17.0% (SD 24%), the Bio-Gide membrane sites yielded 13.5% (SD 15%) of bone tissue density. In sites treated with the Inion membrane, 9.5% of old bone density and 7.5% of newly formed bone could be found, whereas the Bio-Gide((R)) membrane sites showed 3.8% of old bone density and 9.8% of newly formed bone. There were no statistically significant differences between the two groups with respect to the two variables. The osteoid rim was more extended with the Bio-Gide((R)) (6.6 mm) than with the Inion membrane (5.1 mm) but the difference between the two treatments did not reach statistical significance. Highly significant reductions in the area of the defect with both membranes were detected with significant increases in CT density at the immediate inferio-buccal adjacent bone and in the surgical defect area with both membranes. However, there was neither significant change in CT density in the immediate inferior-lingual adjacent bone of the two membranes, nor significant difference between the membranes on any of the four measurements (area of defect: P=0.1354; CT density immediate inferio-buccal adjacent bone: P=0.7615; CT density surgical defect area: P=0.1876; CT density immediate inferio-lingual adjacent bone: P=0.4212). CONCLUSION: The overall clinical outcome was satisfying and the majority of the patients showed an uneventful healing phase. Both membranes presented similar capacities regarding their barrier function and were associated with analogous bone regeneration. No statistically valid evidence about the superiority of one particular membrane was obtained. For the patient the only difference is that one product is animal derived and the other synthetic.
File Format	HTM / HTML
ISSN	09057161
Issue Number	10
Volume Number	20
e-ISSN	16000501
Journal	Clinical Oral Implants Research
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2009-10-01
Publisher Place	Denmark
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Dentistry Discipline General Surgery Alveolar Process Physiology Biocompatible Materials Therapeutic Use Bone Regeneration Guided Tissue Regeneration, Periodontal Methods Membranes, Artificial Tooth Extraction Absorbable Implants Adolescent Adult Drug Effects Alveolar Ridge Augmentation Bone Density Collagen Female Humans Male Molar, Third Surgery Osteogenesis Pilot Projects Polymers Prospective Studies Single-blind Method Tooth, Impacted Treatment Outcome Wound Healing Young Adult Comparative Study Journal Article Multicenter Study Randomized Controlled Trial Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Oral Surgery

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Comparison of two resorbable membrane systems in bone regeneration after removal of wisdom teeth: a randomized-controlled clinical pilot study.

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