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KMID : 0362420080460020125
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Journal of Korean Academy of Prosthodontics
2008 Volume.46 No. 2 p.125 ~ p.136
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Clinical and radiographic evaluation of Neoplant® implant with a sandblasted and acid-etched surface and external connection
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An Hee-Suk
Lee Keun-Woo
Shim June-Sung
Cho Kyoo-Sung
Moon Hong-Seok
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Abstract
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Statement of problem: Since the concept of osseointegration in dental implants was introduced by Branemark et al, high long-term success rates have been achieved. Though the use of dental implants have increased dramatically, there are few studies on domestic implants with clinical and objective long-term data.
Purpose: The aim of this retrospective study was to provide long-term data on the Neoplant® implant, which features a sandblasted and acid-etched surface and external connection.
Material and methods: 96 Neoplant® implants placed in 25 patients in Yonsei University Hospital were examined to determine the effect of the factors on marginal bone loss, through clinical and radiographic results during 18 to 57 month period.
Results: 1. Out of a total of 96 implants placed in 25 patients, two fixtures were lost, resulting in 97.9% of cumulative survival rate. 2. Throughout the study period, the survival rates were 96.8% in the maxilla and 98.5% in the mandible. The survival rates were 97.6% in the posterior regions and 100% in the anterior regions. 3. The mean bone loss for the first year after prosthesis placement and the mean annual bone loss after the first year for men were significantly higher than that of women (P<0.05). 4. The group of partial edentulism with no posterior teeth distal to the implant prosthesis showed significantly more bone loss compared to the group of partial edentulism with presence of posterior teeth distal to the implant prosthesis in terms of mean bone loss for the first year and after the first year (P<0.05). 5. The mean annual bone loss after the first year was more pronounced in posterior regions compared to anterior regions (P<0.05). 6. No significant difference in marginal bone loss was found in the following factors: jaws, type of prostheses, type of opposing dentition, and submerged /non-submerged implants (P<0.05).
Conclusion: On the basis of these results, the factors influencing marginal bone loss were gender, type of
edentulism, and location in the arch, while the factors such as arch, type of prostheses, type of opposing dentition,
submerged / non- submerged implants had no significant effect on bone loss. In the present study, the cumulative survival rate of the Neoplant® implant with a sandblasted and acid-etched surface was 97.9% up to a maximum 57-month
period. Further long-term investigations for this type of implant system and evaluation of other various domestic
implant systems are needed in future studies.
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KEYWORD
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Neoplant®, SLA surface, External connection, Survival rate, Marginal bone loss
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