Editorial Type:
Article Category: Other
 | 
Online Publication Date: 01 Apr 2015

Alveolar Ridge Preservation With the Socket-Plug Technique Utilizing an Alloplastic Putty Bone Substitute or a Particulate Xenograft: A Histological Pilot Study

BDS,
MDS,
MDS,
BS, MDT, and
DDS
Page Range: 178 – 183
DOI: 10.1563/AAID-JOI-D-13-00025
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Following tooth extraction, ridge preservation procedures are employed to regenerate bone in the extraction socket, limit consequent ridge resorption, and provide a stable base for implant placement. The purpose of this study is to histologically evaluate and compare bone regeneration in extraction sockets grafted with either a putty alloplastic bone substitute or particulate anorganic bovine xenograft utilizing the socket-plug technique. Nineteen patients underwent 20 tooth extractions and ridge preservation following a standardized protocol. Ten sites were grafted with calcium phosphosilicate putty (CPS group) and the remaining 10 with anorganic bovine bone substitute (BO group). Patients were recalled after 4–6 months to evaluate the bone regeneration and to proceed with implant placement. A bone core was obtained during the implant procedure from each site and was used for histologic analysis. Histomorphometry revealed that residual graft values were significantly higher in the BO group (25.60% ± 5.89%) compared to the CPS group (17.40% ± 9.39%) (P < .05). The amount of new bone regenerated was also statistically significant higher in the alloplast group (47.15% ± 8.5%) as compared to the xenograft group (22.2% ± 3.5%) (P < .05). Results suggest that ridge preservation using a putty calcium phosphosilicate alloplastic bone substitute demonstrates more timely graft substitution and increased bone regeneration when compared to an anorganic bovine bone xenograft.

<bold>Figures 1 and 2.</bold>
Figures 1 and 2.

Figure 1. Representative radiograph of a socket regenerated with calcium phosphosilicate putty at 5 months. Note that the radiodensity in the socket area is very similar to the adjacent ungrafted area. Figure 2. Representative radiograph of a socket regenerated with bovine bone substitute at 6 months. Note that the socket area exhibits higher radiodensity indicative of residual graft particles.


<bold>
  <sc>Figures 3 and 4.</sc>
</bold>
Figures 3 and 4.

Figure 3. Representative images of calcium phosphosilicate putty core at 6 months: (a) medium (×20), (b) high (×40), and (c) very high (×100) magnifications. The red-stained tissue is mineralized, newly regenerated bone with visible cell nuclei. Some residual graft particles can be seen in all of the microphotographs. Figure 4. Representative images of bovine bone substitute core at 6 months: (a) medium (×20), (b) high (×40), and (c) very high (×100) magnifications. Large remnants of residual graft particles can be noted. Red area denotes newly formed bone with visible cell nuclei.


<bold>Figure 5</bold>
.
Figure 5 .

Graphical representation of the percentage of vital bone and residual bone graft in both groups.


Contributor Notes

Corresponding author, e-mail: Kotsa001@umn.edu
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