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Clinical Oral Investigations

Published in:

01-09-2019 | Original Article

Histologic analyses of flapless ridge preservation in sockets with buccal dehiscence defects using two alloplastic bone graft substitutes

Authors: Nadja Naenni, Stefan P. Bienz, Ronald E. Jung, Christoph H.F. Hämmerle, Daniel S. Thoma

Published in: Clinical Oral Investigations | Issue 9/2019

Abstract

Objectives

To investigate whether one of two synthetic bone substitute materials used for ridge preservation in the extraction sockets with buccal dehiscence defects was superior regarding new bone formation and ridge preservation and to compare it to sites left for spontaneous healing.

Materials and methods

In sixteen dogs, P3 and P4 were hemi-sectioned and the respective distal roots were extracted. Following the preparation of a mucoperiosteal flap without vertical releasing incisions, 50% of the buccal bone was carefully removed. The extraction sites were randomly assigned either to a ridge preservation procedure (alloplastic bone substitute material (two test groups)) or to spontaneous healing (control group). Descriptive histology and histomorphometric analyses were performed at healing times of 4, 8, and 16 weeks. In case of homogeneous variances, the results were analyzed by one-way ANOVA, followed by Tukey’s post-hoc test. If inhomogeneous, the data was analyzed using Welch-type ANOVA, followed by the Games–Howell post-hoc test.

Results

The use of bone substitute material led to significantly greater horizontal dimensions amounting to 3.3 mm (SD = 0.67; test 1) and 3.5 mm (SD = 0.72; test 2) compared to spontaneous healing (1.7 mm, SD = 0.23) at 16 weeks of healing (p < 0.0001). A significant difference was observed between spontaneous healing and the test groups in terms of newly formed bone tissue at 4, 8, and 16 weeks (p = 0.001), with values reaching 7.9, 21.8, and 36.8% (test 1), 5.0, 10.4, and 29% (test 2), and 26.2, 43.5, and 56.4% (control), but there were no significant differences between the test groups (p > 0.05). The final ridge profile was more favorable after ridge preservation (p < 0.001) as demonstrated by a loss of 28.8% (spontaneous healing) and an increase in both test groups at 16 weeks (test 1 = 60.5% and test 2 = 31.2%).

Conclusions

The use of alloplastic materials rendered greater horizontal dimensions and a more favorable maintenance of the ridge profile.

Clinical relevance

Alloplastic bone substitute materials can successfully be used for ridge preservation procedures.

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Title: Histologic analyses of flapless ridge preservation in sockets with buccal dehiscence defects using two alloplastic bone graft substitutes
Authors: Nadja Naenni
Stefan P. Bienz
Ronald E. Jung
Christoph H.F. Hämmerle
Daniel S. Thoma
Publication date: 01-09-2019
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 9/2019
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-018-2784-4

At a glance: The STEP trials

Springer Medicine

Histologic analyses of flapless ridge preservation in sockets with buccal dehiscence defects using two alloplastic bone graft substitutes

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

At a glance: The STEP trials

Springer Medicine

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

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