Abstract:

Objective

To investigate the effects of periodontitis and smoking by single factor and two-factor synergistic action on the peri-implant alveolar bone loss.

Methods

Four groups of posterior partially edentulous patiens were established： healthy control group；periodontitis group； smoking group； periodontitis combined with smoking group. ITI implants were embedding into the jaws of patiens in four groups seperately. X-ray examinations were made and implant marginal alveolar bone loss （MBL） were measured 12 months after loading with the SIDEXIS-XG software. Besides， 12 months after loading， improved plaque index （mPLI），modified bleeding index （mSBI）， probing depth （PD） were also recorded. SPSS 12.0 was applied to analyze the data.

Results

There were no significant difference between periodontitis group and healthy control group （P＞0.05）. Simultaneously， no significant difference between smoking group and healthy control group （P ＞0.05）. There were， however， significant difference in the MBI and mSBI （P ＜0.05）， no significant difference （P ＞0.05） in the mPLI and PD between smoking combined with periodontitis group and healthy control group.

Conclusions

Reliable effects can be achieved when ITI implant system is applied in periodontitis patiens with effective periodontal treatments and maintenances. However， it may appear obvious marginal bone resorption in periodontitis plus smoking group， which should be careful during cases choosing.

Key words: Dental implant, Periodontitis, Smoking, Marginal bone resorption