Clinical and histological comparison of the soft tissue morphology between zirconia and titanium dental implants under healthy and experimental mucositis conditions - A randomized controlled clinical trial.
J Clin Periodontol. 2020 Dec 05;:
Authors: Bienz SP, Hilbe M, Hüsler J, Thoma DS, Hämmerle CHF, Jung RE
Abstract
OBJECTIVES: To analyze the soft tissue morphology under healthy and experimental mucositis conditions comparing zirconia and titanium implants.
METHODS: Forty-two patients with two adjacent missing teeth received one zirconia (Zr) and one titanium (Ti) implant, with the mesial and distal position randomized. At 3 months, half of the patients were instructed to continue (healthy; h) and the other half to omit (experimental mucositis; m) oral hygiene around the implants for 3 weeks. Clinical parameters were evaluated before and after the experimental phase and a soft tissue biopsy was harvested. Mixed model analyses were performed to analyze the data.
RESULTS: The plaque control record increased significantly for the two mucositis groups, reaching 68.3±31.9% (mean±standard deviation) for Zr-m and 75.0±29.4% for Ti-m (p<0.0001), being also significantly lower for Zr-m than for Ti-m. Bleeding on probing remained stable in group Zr-m and amounted to 21.7±23.6%, but increased significantly in group Ti-m (p=0.040), measuring 32.5±27.8%. The number of inflammatory cells and the length of the junctional epithelium did not significantly differ between the groups.
CONCLUSION: Both implants rendered similar outcomes under healthy conditions. Lower plaque and bleeding scores were detected for zirconia implants under experimental mucositis conditions. Histologically, only minimal differences were observed.
PMID: 33278048 [PubMed - as supplied by publisher]
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