J Korean Acad Periodontol.  2009 Sep;39(3):367-373. 10.5051/jkape.2009.39.3.367.

The influence of membrane exposure on post-extraction dimensional change following ridge preservation technique

• Nam HW
• Park YJ
• Koo KT
• Kim TI
• Seol YJ
• Lee YM
• Gu Y
• Rhyu IC
• Chung CP

• KMID: 2212151
• DOI: http://doi.org/10.5051/jkape.2009.39.3.367

Abstract

PURPOSE
Following tooth extraction caused by severe periodontitis, alveolar ridge dimension lose their original volume. To reduce the alveolar ridge dimension, the ridge preservation technique has been introduced and tested in many clinical studies with membrane alone or membrane plus graft, achieving reduced ridge loss compared to extraction only. The aim of the present clinical study was to compare the post-extraction dimensional changes in the membrane exposure group to non-exposure group during healing period following ridge preservation technique.
METHODS
Ridge preservation was performed in 44 extraction sites. After extraction, deproteinized bovine bone mineral coated with synthetic oligopeptide (Ossgen-X15(R)) or deproteinized bovine bone mineral (Bio-Oss(R)) was implanted into the socket. A collagen membrane (Bio-Gide(R)) was trimmed to cover the socket completely and applied to the entrance of the socket. Four clinical parameters were compared between baseline and 6 months.
RESULTS
During healing period, membrane exposure was observed at 19 sites. At the re-entry, hard newly formed tissue were observed at the ridge preservation site. The grafted socket sites were well preserved in their volume dimension. In both groups, horizontal ridge width was reduced and vertical height was increased. There were not statistically significant differences in horizontal (-1.32 mm vs -1.00 mm) and vertical ridge change (2.24 mm vs 2.37 mm at buccal crest, 1.36 mm vs. 1.53 mm at lingual crest) between two groups.
CONCLUSIONS
The ridge preservation approach after tooth extraction effectively prevented resorption of hard tissue ridge in spite of membrane exposure during healing period.

Keyword

bone substitutes; tooth socket

MeSH Terms

Alveolar Process
Bone Substitutes
Collagen
Membranes
Periodontitis
Tooth Extraction
Tooth Socket
Transplants
Bone Substitutes
Collagen

Figure

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  Figure 1 Ridge preservation procedure. (A) Post-extraction view (B) Bone particles and collagen membrane (C) Primary closure (D) 6 months healing view.

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  Figure 2 Membrane exposure case (A) After extraction of #25, 27 (B) Ridge preservation on #25 extraction socket (C) 2 weeks of healing after ridge preservation. Membrane was exposed (D) 2 months of healing. Exposed membrane was not observed.

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  Figure 3 (A) Before extraction (B) 6 months of healing after ridge preservation (C) Implant fixture installation.

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