Résumé
The success of implants is based on the quantity and height of the alveolar bone which reduce in the patients with chronic periodontitis.The purpose of this study was: to estimate the success of short implants activated by plasma rich in growth factors in the posterior areas of bone resorption following chronic periodontitis and radiographic study of the crestal bone height. A total of 23 short implants[Bicon Integra] length[5-5.7-6-8]mm, diameter [4-4.5-5-6]mm,[6 upper -17 lower] were placed in 11 patients [9 males and 2 females] aged 35-60 years [mean age 49,9 years] with posterior edentulous areas and limited bone height following treated chronic periodontitis, the patients were selected from the periodontal clinic -Damascus university. Plaque index[PI] gingival index [GI] ,bleeding on probing [POB] probing depth [PD] ,clinical attachment loss [CAL] and digital panoramic radiographs were taken before implantation. Plasma rich in growth factors[PRGF]and fibrin membrane were prepared from the patient's own blood and used to activate and cover implants. Implants success rate was studied according to Albrektsson et al. 1986 and periapical radiographs were used to determine the vertical difference in crestal bone level measurements, from the baseline[day of loading]to 6 months and 12 months .Statistical study [T Student test ,Mann-Whitney U and Person]at p<0.05. The success rate of the short implants activated by PRGFwas 100%,and no statistically significant differences in [PI], [GI], [POB] pre loading and post loading in 6-12 months and no statistically significant differences in the height measurements of crestal bone after loading in 6-12 months, and no correlation between [[PI], [GI], [POB]]and the height of crestal bone at p<0.05. Short implants activated by PRGF have obvious short term success in the patients with treated and stable chronic periodontitis and the most important thing is the stability in the height of the crestal bone