The potential benefit of socket preservation therapies was demonstrated resulting in significantly less vertical and horizontal contraction of the alveolar bone crest. The scientific evidence does not provide clear guidelines in regards to the type of biomaterial, or surgical procedure, although a significant positive effect of the flapped surgery was observed. There are no data available to draw conclusions on the consequences of such benefits on the long-term outcomes of implant therapy.

Only secondary stability RFA values were able to significantly predict implant outcomes, but not primary stability values. There was a good correlation between RFA and the proposed clinical classification of primary stability.

Aim To evaluate the prevalence of peri‐implant diseases in Spain, as well as the associated risk indicators. Material and Methods This is a cross‐sectional study using a network of sentinel dentists, who randomly selected 10 patients with implants (placed, at least, 5 years before), which were clinically and radiographically evaluated. Case definitions were established for peri‐implant mucositis [bleeding on probing (BOP) and no bone level ≥2 mm] and peri‐implantitis (BOP plus bone level ≥2 mm). Potential predictor variables, at univariate and multivariate levels, were explored by means of binary logistic regression. Results A total of 49 sentinel dentists provided complete data from 474 implants in 275 patients. At implant level, prevalences for peri‐implant mucositis and peri‐implantitis were 27% (95% confidence interval [CI] 22–32) and 20% (95% CI: 15–24), respectively, with 17% of implants (14–21) with bone level ≥2 mm without BOP. At patient level, prevalences were 27% (22–32), 24% (19–29) and 18% (13–22), respectively. In the multiple regression analysis, statistically significant associations for peri‐implantitis (p < 0.10) were found for gender, peri‐implant supportive therapy, implant location, diameter and surface, type of prosthesis and access to interproximal hygiene. Conclusions In this representative subject sample across Spain, the prevalence of peri‐implant diseases was high (51%).

Within the same patients, the implants placed with the immediate protocol demonstrated a higher tendency to crestal bone loss and to peri-implantitis, although these differences were not statistically significant.

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Objectives To evaluate radiographic bone level (RxBL) at dental implants and its associated factors in Spain. Material and methods This cross‐sectional study was performed by a network of sentinel dentists from regions of Spain. RxBL was defined as the distance from the implant shoulder to the first clearly visible contact between the implant surface and the bone. Radiographic measurements were performed by two trained and experienced periodontists. Implant and patient data were also collected. Descriptive, bivariate, discriminative and multivariate analyses were done. Results A total of 49 sentinel dentists provided data 275 patients. Mean RxBL from 474 implants (5–13 years) was 1.87 mm (range: 0.00–13.17 mm). Statistically significant associations between RxBL and clinical output variables (bleeding on probing, oedema, plaque, probing depth, suppuration, keratinized tissue) were found. In the multiple regression analysis, statistically significant associations for RxBL were found for smoking habit, implant diameter, years of follow‐up and type of prosthesis (p < 0.01). Conclusions Peri‐implant RxBL ranged from 0 to 13.17 mm. It was significantly associated with clinical output variables and with some potentially predictor variables, at patient‐ (smoking >10 cigarettes/day) and implant‐ (diameter, years of follow‐up, Toronto bridge) levels.