Bicon Implant Crown-implant Ratio In Posterior:A Short Term Clinical Observation And Effect On Bone And Soft Tissue

[Objective]To assess the short-term clinical efficacy of the Bicon short implant(6-8 mm)in the crown to implant ratio(C/I)of patients with insufficient posterior teeth.The effects of implant crown and root ratio on the height and bone level of the proximal and distal margin were observed and recorded,and the effect of crown and root ratio on soft tissue was observed and recorded.[Methods]A total of 10 patients were implanted from Shandong University in January 2012-December 2016,and 13 were implanted with Bicon implants in the posterior area.X-ray parallel projection technique was used to observe the effects of restorations on the day and 3 years(C/I)and the height of the proximal and distal margin of the implant.Clinical changes were observed in the soft tissue of the implant.The implant restoration was divided into two groups according to the crown:group I:C/I<2.0.group 2:C/I≥2.0.Calculate the difference between the two sets of data distribution in the total sample Shapiro calculation,Pearson calculated correlation,Kendall rank correlation coefficient,showing the correlation between implant crown length and soft tissue parameters.[Result]The average C/I of the 13 Bicon implants after implantation was(1.854±0.292),ranging from 1.561 to 2.146.Statistical analysis showed no difference between C/I,group 1(C/I<2.0)and group 2(C/I≥2.0).There was no significant difference in the height of the incision and the height of the alveolar bone in the proximal and distal margin of the implant during the observation period.Alveolar bone resorption group 1(-0.24 ± 0.98)and group 2(-0.12 ± 0.28)were negative,indicating no alveolar bone loss between the two groups.The mean mPI and nSBI values of the patients were measured.Results P<0.05 indicates that the high crown-to-root ratio of the implants may lead to inflammation of the soft tissue around the implant.[Conclusion]Bicon implants have a higher crown-to-implant ratio comparing to conventional implants.After 3 years of functional load assessment,there was no increased risk of bone and bone loss at the edge of the implant and had a good clinical application in patients with insufficient posterior bone loss value.High crown-to-implant ratio may be may lead to inflammation of the soft tissue around the implant.Regular oral examination and dental implant maintenance should be done.