Crestal bone loss associated with different implant surfaces in the posterior mandible in patients with a history of periodontitis. A retrospective study. Issue 1 (6th January 2021)

• Record Type: Journal Article
• Authors: Sicilia, Alberto; Gallego, Luis; Sicilia, Pelayo; Mallo, Carmen; Cuesta, Susana; Sanz, Mariano
• Is Part Of: Clinical oral implants research. Volume 32:Issue 1(2021)
• Page Start: 88
• Page End: 99
• Publication Date: 2021-01-06
• Subjects: chronic periodontitis -- dental implants -- peri‐implantitis -- retrospective studies -- X‐rays; Dental implants -- Research -- Periodicals; 617.69
• DOI: 10.1111/clr.13682
• Languages: English
• ISSNs: 0905-7161

Abstract

Abstract: Objective: To retrospectively assess the interproximal bone loss (CBL) in external hexagon implants (EHI), with different surface micro‐topography, placed in the posterior mandible in patients with a history of periodontitis undergoing supportive periodontal care. Material and methods: 268 consecutive patients received 755 EHI implants in the mandibular molar region between 2007 and 2015 with the following surface characteristics: 72 turned, 145 hybrids (double acid‐etched/turned), and 538 anodized. CBL was yearly evaluated by analysing calibrated digital periapical radiographs, with a follow‐up of 1–6 years. Data on implant survival were also calculated. Results: At 6 years (53 patients), the mean CBL was 1.34/1.42 mm at patient/implant level, respectively (range: 0–5.2 mm). Significantly higher CBL was detected in anodized implants than in turned and hybrid implants (1.92/1.46/1.02 mm) ( p < .01). The maximum CBL values were found in 2 anodized implants at 4 years (6.3 and 8.1 mm). CBL ≥2 mm was detected in 18% of implants at 3 years and 35% at 6 (p < 2.2 × 10 −16 ), this prevalence being 2.6 times higher in the anodized than in the hybrid and turned group (40%/15.6%, p < .0094). At 6 years, 25 anodized implants presented CBL ≥3 mm (18%). 6 anodized implants (5 patients) were removed between 4 and 5 years. Conclusion: A significant higher CBL was observed in anodized, compared to hybrid and turned implants, when placed in the mandibular molar region of periodontal patients, with a follow‐up of 1 to 6 years.