J Korean Acad Prosthodont.  2011 Jul;49(3):206-213.

Success rate and marginal bone loss of Osstem USII plus implants; Short term clinical study

• Kim SK
• Kim JH
• Lee KW
• Cho KS
• Han DH

Abstract

PURPOSE
The aim of this study was to evaluate the clinical value of Osstem(R) USII plus system implants. Clinical and radiographic data were analyzed for 88 implants placed and functionally loaded for a 12 month period at the Yonsei University Dental Hospital. MATERIALS AND METHOD: Based on the patient's medical records, clinical factors and their effects on implant marginal bone resorption, distribution and survival rate were analyzed. The marginal bone loss was evaluated at implant placement and during a 6 to 12 months functional loading period. The independent sample t-test was used to evaluate the interrelationship between the factors (alpha=0.05), and one way repeated measures ANOVA was used to compare the amount of marginal bone resorption.
RESULTS
The cumulative survival rate for 88 implants was 100%. The marginal bone resorption from implant placement to prosthetic delivery was 0.24 mm and the average marginal bone resorption from prosthetic delivery to 12 months of functional loading was 0.19 mm. The total average bone resorption from implant placement to 12 months of functional loading was 0.43 mm. There were no statistically differences in the amount of marginal bone resorption when implants were placed in the maxilla or the mandible (P>.05), however, implants placed in the posterior areas showed significantly more marginal bone loss than those placed in the anterior areas (P<.05).
CONCLUSION
Based on these results, the short term clinical success rate of RBM surface treated external connection domestic implants showed satisfactory results and the marginal bone loss was in accord with the success criteria of dental implants.

Keyword

RBM surface; External connection; Survival rate; Marginal bone loss

MeSH Terms

Bone Resorption
Dental Implants
Mandible
Maxilla
Medical Records
Survival Rate
Dental Implants

Figure

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  Fig. 1. Osstem® USII plus implant (Osstem Co., Seoul, Korea).

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  Fig. 2. References used to measure actual marginal bone loss. a: top level of implant platform, b: implant to marginal bone contact level, c: inter-thread distance of three threads.

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