Comparison of alveolar bone resorption between immediate implant and delayed implant in the posterior area

doi:10.19438/j.cjoms.2019.02.010

Abstract

Abstract: PURPOSE: To evaluate alveolar bone changes after immediate implant in posterior area by using X-rays, and make a comparison between immediate implants and delayed implants. METHODS: In this study, 94 cases of immediate implants and 168 cases of delayed implants were followed up for 6 months to 1 year from 2014 to 2016. X-ray films were taken by parallel projection technique immediately after implantation, 6 months and 1 year after operation. The vertical distance between the tip of the alveolar crest near the implant and the neck of implants was measured. Paired t test was used to analyze the absorption changes of alveolar bone in the mesial-distal direction of the implant 6 months and 1 year after surgery. SPSS 19.0 software package was used to compare the alveolar bone resorption degree between the two different implantation methods. RESULTS: In immediate group and delayed group, all the implants showed great bone osteogenesis, and the alveolar bone of the implants showed different degree of resorption. X-ray films showed the average resorption of the alveolar bone in the immediate implantation group was 0.25 and 0.43 mm in the delayed implantation group 6 months after implantation, and there was no significant difference between the two groups (P>0.05). One year after implantation, the average resorption of the alveolar bone was 0.57 mm in the immediate implantation group and 1.10 mm in the delayed implantation group, the difference was statistically significant (P<0.05). CONCLUSIONS: In the posterior area, both immediate implants and delayed implants showed great osseointegration, the alveolar bone in both mesial and distal area was absorbed obviously, and after 1 year the alveolar bone resorption in immediate implants was less than that in delayed implants.

Key words: Immediate posterior implants, Bone resorption, Osseointegration

CLC Number:

R782.1

WAN Shao-nan, PU Yi-ping, YANG Chi. Comparison of alveolar bone resorption between immediate implant and delayed implant in the posterior area[J]. China Journal of Oral and Maxillofacial Surgery, 2019, 17(2): 150-154.

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