J Korean Acad Prosthodont.  2010 Jan;48(1):28-40. 10.4047/jkap.2010.48.1.28.

The effects of local factors on the survival of dental implants: A 19 year retrospective study

• Kim SH
• Kim S
• Lee KW
• Han DH

• KMID: 2000318
• DOI: http://doi.org/10.4047/jkap.2010.48.1.28

Abstract

PURPOSE
The aim of this retrospective study was to provide long-term data about the correlation between multifactorial local factors and the survival of implants. MATERIAL AND METHODS: During 19 years (1991 to 2009), 2796 implants were placed in 879 patients. From dental charts and radiographs, the following data were collected: patient's age at implant placement, gender, implant system, surface, length, diameter, location of implant placement, bone quality, primary stability, type of prosthesis. The correlations between these data and implant survival were analyzed. Statistical analysis was performed using Kaplan-Meier survival analysis, Chi-square test, odds ratio.
RESULTS
1. Among the 2796 implants, 150 implants failed that resulted in a cumulative survival rate of 94.64%. The cumulative survival rate of smooth surface implants (91.76%) was lower than rough surface implants (96.02%). 2. Anatomic location, implant surface, diameter of smooth surface implant, primary stability, type of prosthesis, patient's age and gender were significantly associated with implant survival (P < .05). 3. No significant difference in implant survival was found in relation to the following factors: implant length, bone quality, diameter of rough surface implants and type of rough surface according to implant manufacturer (P < .05).
CONCLUSION
Local factors such as anatomic location, implant surface, diameter of smooth surface implant, primary stability and type of prosthesis have a significant effect on implant survival.

Keyword

Dental implants; Implant failure; Rough surface implants; Smooth surface implants; Location; Primary stability; Type of prosthesis

MeSH Terms

Dental Implants
Humans
Organic Chemicals
Prostheses and Implants
Retrospective Studies
Survival Rate
Dental Implants
Organic Chemicals

Figure

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  Fig. 1. The distributions of the placed implants according to patients’ age and gender.

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  Fig. 2. Distribution of the placed implants according to implant company and surface.

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  Fig. 3. Distribution of the placed implants according to location and implant surface.

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  Fig. 4. Distribution of the placed implants according to implant length and surface.

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  Fig. 5. Distribution of the placed implants according to implant diameter and surface.

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  Fig. 6. Distribution of the placed implants according to type of prosthesis.

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  Fig. 7. Kaplan- Meier curves for implant survival, by type of implant surface.

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  Fig. 8. Kaplan- Meier curves for implant survival, by type of implant company and surface.

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