Evaluation of topical erythropoietin application on the healing outcome of gingival graft recipient site; a randomized controlled clinical trial

Siamak Yaghobee, Nina Rouzmeh, Mina Taheri, Hoori Aslroosta, Sanaz Mahmoodi, Masoomeh Mohammadnejad Hardoroodi, Pardis Soleimanzadeh Azar, Afshin Khorsand, Siamak Yaghobee, Nina Rouzmeh, Mina Taheri, Hoori Aslroosta, Sanaz Mahmoodi, Masoomeh Mohammadnejad Hardoroodi, Pardis Soleimanzadeh Azar, Afshin Khorsand

Abstract

Background: Free gingival graft (FGG) is a highly predictable method to increase the width of keratinized gingiva. Various materials have been reported to accelerate the wound healing process. Considering the positive effect of EPO on dermal wound healing this study aimed to investigate the effects of EPO on the rate of healing and degree of inflammation in free gingival grafts.

Methods: Seventeen patients with bilateral lack of keratinized gingiva in mandible were selected for this clinical trial. The surgical intervention was performed after phase I periodontal therapy. Recipient site was prepared apical to the mucogingival line, and FGG was harvested from the palate. Before graft placement, the test side and control side were treated with 1 ml of EPO 4000 IU/ml and distilled water, respectively, for 2 min. On days 7, 14, 21, 28, 60, and 90 after surgery, the grafted sites were examined by blinded observers to compare the healing and inflammation of the areas.

Results: All the 17 patients completed the surgeries and follow-up examinations. Direct examination revealed significantly better healing in EPO group only on the 28th day. Assessment of the photographs showed a significant value in favor of the test group at some other time points as well. The EPO group demonstrated less inflammation, which was statistically significant in many time points. The graft area was 80.88 ± 30.21 mm2 and 71.35 ± 15.62 mm2 in the EPO and control groups, respectively. The difference was not significant, though.

Conclusions: Topical application of erythropoietin can accelerate the healing of gingival grafts and reduce the inflammation during healing period. The final graft outcome, nevertheless, does not seem to be influenced by EPO. Trial registration This was a split-mouth randomized controlled clinical trial (IRCT201201278830N1). The first registration date: 2016-10-22.

Keywords: Erythropoietin; Gingiva; Inflammation; Wound healing.

Conflict of interest statement

The authors declare that they have no competing interests.

© 2021. The Author(s).

Figures

Fig. 1
Fig. 1
Consort flow diagram
Fig. 2
Fig. 2
a Baseline FGG treatment EPO group, b baseline FGG treatment control group, c 7 days postop EPO group, d 7 days postop control group, e 14 days postop EPO group, f 14 days postop control group, g 21 days postop EPO group, h 21 days postop control group, i 28 days postop EPO group, j 28 days postop control group, k 60 days postop EPO group, l 60 days postop control group, m 90 days postop EPO group, n 90 days postop control group

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