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Meta-Analysis
. 2009 Oct 7;2009(4):CD003875.
doi: 10.1002/14651858.CD003875.pub3.

Enamel matrix derivative (Emdogain(R)) for periodontal tissue regeneration in intrabony defects

Affiliations
Meta-Analysis

Enamel matrix derivative (Emdogain(R)) for periodontal tissue regeneration in intrabony defects

Marco Esposito et al. Cochrane Database Syst Rev. .

Abstract

Background: Periodontitis is a chronic infective disease of the gums caused by bacteria present in dental plaque. This condition induces the breakdown of the tooth supporting apparatus until teeth are lost. Surgery may be indicated to arrest disease progression and regenerate lost tissues. Several surgical techniques have been developed to regenerate periodontal tissues including guided tissue regeneration (GTR), bone grafting (BG) and the use of enamel matrix derivative (EMD). EMD is an extract of enamel matrix and contains amelogenins of various molecular weights. Amelogenins are involved in the formation of enamel and periodontal attachment formation during tooth development.

Objectives: To test whether EMD is effective, and to compare EMD versus GTR, and various BG procedures for the treatment of intrabony defects.

Search strategy: We searched the Cochrane Oral Health Group Trials Register, CENTRAL, MEDLINE and EMBASE. Several journals were handsearched. No language restrictions were applied. Authors of randomised controlled trials (RCTs) identified, personal contacts and the manufacturer were contacted to identify unpublished trials. Most recent search: February 2009.

Selection criteria: RCTs on patients affected by periodontitis having intrabony defects of at least 3 mm treated with EMD compared with open flap debridement, GTR and various BG procedures with at least 1 year follow up. The outcome measures considered were: tooth loss, changes in probing attachment levels (PAL), pocket depths (PPD), gingival recessions (REC), bone levels from the bottom of the defects on intraoral radiographs, aesthetics and adverse events. The following time-points were to be evaluated: 1, 5 and 10 years.

Data collection and analysis: Screening of eligible studies, assessment of the methodological quality of the trials and data extraction were conducted in duplicate and independently by two authors. Results were expressed as random-effects models using mean differences for continuous outcomes and risk ratios (RR) for dichotomous outcomes with 95% confidence intervals (CI). It was decided not to investigate heterogeneity, but a sensitivity analysis for the risk of bias of the trials was performed.

Main results: Thirteen trials were included out of 35 potentially eligible trials. No included trial presented data after 5 years of follow up, therefore all data refer to the 1-year time point. A meta-analysis including nine trials showed that EMD treated sites displayed statistically significant PAL improvements (mean difference 1.1 mm, 95% CI 0.61 to 1.55) and PPD reduction (0.9 mm, 95% CI 0.44 to 1.31) when compared to placebo or control treated sites, though a high degree of heterogeneity was found. Significantly more sites had < 2 mm PAL gain in the control group, with RR 0.53 (95% CI 0.34 to 0.82). Approximately nine patients needed to be treated (NNT) to have one patient gaining 2 mm or more PAL over the control group, based on a prevalence in the control group of 25%. No differences in tooth loss or aesthetic appearance as judged by the patients were observed. When evaluating only trials at a low risk of bias in a sensitivity analysis (four trials), the effect size for PAL was 0.62 mm (95% CI 0.28 to 0.96), which was less than 1.1 mm for the overall result. Comparing EMD with GTR (five trials), GTR showed statistically significant more postoperative complications (three trials, RR 0.12, 95% CI 0.02 to 0.85) and more REC (0.4 mm 95% CI 0.15 to 0.66). The only trial comparing EMD with a bioactive ceramic filler found statistically significant more REC (-1.60 mm, 95% CI -2.74 to -0.46) at the EMG treated sites.

Authors' conclusions: One year after its application, EMD significantly improved PAL levels (1.1 mm) and PPD reduction (0.9 mm) when compared to a placebo or control, however, the high degree of heterogeneity observed among trials suggests that results have to be interpreted with great caution. In addition, a sensitivity analysis indicated that the overall treatment effect might be overestimated. The actual clinical advantages of using EMD are unknown. With the exception of significantly more postoperative complications in the GTR group, there was no evidence of clinically important differences between GTR and EMD. Bone substitutes may be associated with less REC than EMD.

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Conflict of interest statement

None known. Maria Gabriella Grusovin and Marco Esposito were authors of one of the included trials. However, they were not involved in the quality assessment of this trial.

Figures

1
1
Forest plot of Comparison 1 Emdogain versus control: 1 year; Outcome 1.1 PAL.
2
2
Forest plot of Comparison 1 Emdogain versus control: 1 year; Outcome 1.6 Aesthetics (continuous data).
3
3
Forest plot of Comparison 1 Emdogain versus control: 1 year; Outcome 1.7 Aesthetics (dichotomous data).
4
4
Forest plot of Comparison 1 Emdogain versus control: 1 year; Outcome 1.2 PAL < 2 mm.
5
5
Forest plot of Comparison 1 Emdogain versus control: 1 year; Outcome 1.3 PPD.
6
6
Forest plot of Comparison 1 Emdogain versus control: 1 year; Outcome 1.4 REC.
7
7
Forest plot of Comparison 1 Emdogain versus control: 1 year; Outcome 1.5 Marginal bone level.
8
8
Forest plot of Comparison 2 Emdogain versus GTR: 1 year; Outcome 2.1 PAL.
9
9
Forest plot of Comparison 2 Emdogain versus GTR: 1 year; Outcome 2.4 Postoperative complications.
10
10
Forest plot of Comparison 2 Emdogain versus GTR: 1 year; Outcome 2.2 PPD.
11
11
Forest plot of Comparison 2 Emdogain versus GTR: 1 year; Outcome 2.3 REC.
12
12
Forest plot of Comparison 2 Emdogain versus GTR: 1 year; Outcome 2.5 Marginal bone level.
13
13
Forest plot of Comparison 3 Emdogain versus bone graft; Outcome 3.1 PAL.
14
14
Forest plot of Comparison 3 Emdogain versus bone graft; Outcome 3.2 PPD.
15
15
Forest plot of Comparison 3 Emdogain versus bone graft; Outcome 3.3 REC.
1.1
1.1. Analysis
Comparison 1 Emdogain versus control: 1 year, Outcome 1 PAL.
1.2
1.2. Analysis
Comparison 1 Emdogain versus control: 1 year, Outcome 2 PAL < 2 mm.
1.3
1.3. Analysis
Comparison 1 Emdogain versus control: 1 year, Outcome 3 PPD.
1.4
1.4. Analysis
Comparison 1 Emdogain versus control: 1 year, Outcome 4 REC.
1.5
1.5. Analysis
Comparison 1 Emdogain versus control: 1 year, Outcome 5 Marginal bone level.
1.6
1.6. Analysis
Comparison 1 Emdogain versus control: 1 year, Outcome 6 Aesthetics (continuous data).
1.7
1.7. Analysis
Comparison 1 Emdogain versus control: 1 year, Outcome 7 Aesthetics (dichotomous data).
2.1
2.1. Analysis
Comparison 2 Emdogain versus GTR: 1 year, Outcome 1 PAL.
2.2
2.2. Analysis
Comparison 2 Emdogain versus GTR: 1 year, Outcome 2 PPD.
2.3
2.3. Analysis
Comparison 2 Emdogain versus GTR: 1 year, Outcome 3 REC.
2.4
2.4. Analysis
Comparison 2 Emdogain versus GTR: 1 year, Outcome 4 Postoperative complications.
2.5
2.5. Analysis
Comparison 2 Emdogain versus GTR: 1 year, Outcome 5 Marginal bone level.
3.1
3.1. Analysis
Comparison 3 Emdogain versus bone graft, Outcome 1 PAL.
3.2
3.2. Analysis
Comparison 3 Emdogain versus bone graft, Outcome 2 PPD.
3.3
3.3. Analysis
Comparison 3 Emdogain versus bone graft, Outcome 3 REC.

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References

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References to other published versions of this review

Esposito 2003
    1. Esposito M, Coulthard P, Worthington HV. Enamel matrix derivative (Emdogain®) for periodontal tissue regeneration in intrabony defects. Cochrane Database of Systematic Reviews 2003, Issue 2. [DOI: 10.1002/14651858.CD003875] - DOI - PubMed
Esposito 2004
    1. Esposito M, Coulthard P, Thomsen P, Worthington HV. Enamel matrix derivative for periodontal tissue regeneration in treatment of intrabony defects: a Cochrane systematic review. Journal of Dental Education 2004;68(8):834‐44. - PubMed
Esposito 2005
    1. Esposito M, Grusovin MG, Coulthard P, Worthington HV. Enamel matrix derivative (Emdogain®) for periodontal tissue regeneration in intrabony defects. Cochrane Database of Systematic Reviews 2005, Issue 4. [DOI: 10.1002/14651858.CD003875.pub2] - DOI - PubMed

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