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Significance of Width of Keratinized Mucosa on Peri-Implant Tissue Health: A Cross-Sectional Study

*Mohammed T. Fatih, **Faraedon M. Zardawi, **Sarhang S. Gul 

*Kurdistan Board for Medical Specialties, Iraq. 
**Kurdistan Board for Medical Specialties and Department of Periodontics, College of Dentistry, University of Sulaimani, Sulaimani, Iraq. 

Submitted: 02/03/2019; Accepted: 23/04/2019; Published 01/06/2019



Objective: Impact of the width of keratinized mucosa on peri-implant health is controversial. Thus, the aim of this study is to determine the impact of the width of keratinized mucosa on the health status of the peri-implant tissue.  

Methods: Thirty-nine patients with one hundred fifty-seven dental implants with loading time ranged between 1 to 9 years were recruited. Clinical examinations included plaque index (PI), bleeding on probing (BOP), probing pocket depth (PPD), the width of keratinized mucosa (WKM), buccal mucosal recession (MR) and radiographic bone loss (RBL). Statistical analysis was accomplished with bivariate Pearson correlation test and chi-square test. The result was considered statistically significant when the p-value was  ≤ 0.05. 

Results: The mean PI, BOP, MR and RBL were significantly higher for those dental implants with < 2 mm keratinized mucosa compared to those with more than 2 mm WKM. While there was no significant relation between PPD and WKM, statistically significant association between WKM and PI, BOP and MR were found, whereas, no significant relations were detected between WKM and PPD and RBL.

Conclusions: A significant association between WKM and peri-implant tissue health was found. Dental implants with a sufficient WKM >2mm facilitate better oral hygiene measures and better peri-implant health. The augmentation of mucosal tissue for those dental implants with insufficient WKM can provide better prognosis and may extend the life expectancy of the implant.


Keywords: Width of keratinized mucosa, Peri-implant health.                                                                                                                                                                                                                                                Full Article - PDF                                                                                                                                                                                                                                        


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