Influence of three membrane types on healing of bone defects
| Autor: | Fred E. Williams, Francisco Rivera-Hidalgo, John W. Harrison, T. Brad Crump, Larry J. Peterson, Ingrid Y. Guo |
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| Rok vydání: | 1996 |
| Předmět: |
medicine.medical_specialty
Bone Regeneration Polymers Polyesters Synthetic membrane Calvaria Citric Acid Statistics Nonparametric Rats Sprague-Dawley chemistry.chemical_compound Polylactic acid medicine Animals Lactic Acid Bone regeneration General Dentistry Polytetrafluoroethylene Analysis of Variance Guided Tissue Regeneration Soft tissue Biomaterial Membranes Artificial Surgery Rats Membrane medicine.anatomical_structure Biodegradation Environmental Otorhinolaryngology chemistry Oral Surgery Biomedical engineering |
| Zdroj: | Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics. 82(4) |
| ISSN: | 1079-2104 |
| Popis: | Objectives. To determine and compare oseous regeneration associated with three guided tissue regeneration membrane types (expanded polytetrafluoroethylene, dense polytetrafluoroethylene, and an absorbable polylactic acid/citric acid ester base) and removal forces required for expanded and dense polytetrafluoroethylene membranes. Study design. Bilateral osseous defects were created in 30 adult rat calvaria; one defect was covered with a test membrane and the other received no membrane (control). After 2 or 4 weeks, forces required for membrane removal from the tissues were electronically determined, and the calvaria removed and decalcified. Sections through the defects were stained and evaluated electronically and microscopically. Data were analyzed statistically. Results. Microscopic evaluation with Mann-Whitney U test revealed that dense polytetrafluoroethylene was associated with significantly greater bone formation than expanded polytetrafluoroethylene (p=0.02) at 2 weeks and absorbable polylactic acid/citric acid ester base (p=0.004) at 4 weeks. Electronic evaluation of the linear degree of fill with one way ANOVA and Tukey's test found no significant difference (p>0.5) among the experimental or the control groups. In addition, the Mann-Whitney U test indicated that removal forces required for dense polytetrafluoroethylene were significantly less than for expanded polytetrafluorethylene (p=0.003). Conclusions. The use of dense polytetrafluoroethylene as a membrane barrier deserves further investigation as it allows osseous regeneration, it is easier to remove from healing soft tissues, and it is inexpensive. A study with larger sample sizes should be conducted. |
| Databáze: | OpenAIRE |
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