J Dent Rehabil Appl Sci.  2020 Dec;36(4):232-241. 10.14368/jdras.2020.36.4.232.

Complications of implants confronting the extruded posterior teeth

• Jung YW
• Lee SY
• Kim HJ

• KMID: 2512118
• DOI: http://doi.org/10.14368/jdras.2020.36.4.232

Abstract

Purpose
This study investigated the complications and patterns of implants that confronted with the extruded natural teeth.
Materials and Methods
Among patients who received implant treatment between 2006 and 2018 at Chosun University Dental Hos-pital, only implants that had a maintenance period of at least 5 years and that both implants and confronting natural teeth could be measured and compared on a radiograph were selected. They were divided into two groups. Group 1, experimental group consisted of Implants confronting the extruded natural posterior teeth (n = 167: maxilla (Group 1_max ) = 92, mandible (Group 1_man ) = 75) and Group 2, control group consisted of Implants confronting the normal natural posterior teeth (n = 656: maxilla (Group 2_max ) = 272, mandible (Group 2_man ) = 384).
Results
The incidence of complications between Group 1 and Group 2 was statistically significant. In particular, there was a statistically significant difference between the frequency of marginal bone loss and the amount of marginal bone loss.
Conclusion
The extruded natural tooth may cause more frequent complications including bone resorption in the oppos-ing implant.

Keyword

extruded; complication; marginal bone loss; implant

Figure

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  Fig. 1 Incidence rate of complications. Pearson chi-squared test, †: P < 0.05.

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  Fig. 2 Incidence rate of each complication. Pearson chi-squared test, †: P < 0.05, Fisher exact test, *; P > 0.05.

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  Fig. 3 Incidence rate of complications in maxilla. Pearson chi-squared test, †: P < 0.05.

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  Fig. 4 Incidence rate of each complication in maxilla. Pearson chi-squared test, †: P < 0.05, Fisher exact test, *: P > 0.05.

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  Fig. 5 Incidence rate of complications in mandible. Pearson chi-squared test, P > 0.05.

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  Fig. 6 Incidence rate of each complication in mandible. Fisher exact test, *: P > 0.05, Pearson chi-squared test, **: P > 0.05.

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  Fig. 7 Mean marginal bone loss. Mannwhitney U test, †: P < 0.05.

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  Fig. 8 Mean marginal bone loss in maxilla and mandible. Mann-whitney U test, †; P < 0.05.

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  Fig. 9 Mean marginal bone loss of only implants with bone loss. Mann-whitney U test, P > 0.05.

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  Fig. 10 Mean marginal bone loss of only implants with bone loss in maxilla and mandible. Mann-whitney U test, P > 0.05.

Reference

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