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Table 6 Implant characteristics and survival

From: Survival of conventional dental implants in the edentulous atrophic maxilla in combination with zygomatic implants: a 20-year retrospective study

Variable Category Number of anterior implants Relative frequency of anterior implants (%) Survival (%)
1 y 2 y 5 y 10 y 15 y 20 y
Implant length ≤ 10 mm 48 20.3 87.2 87.2 87.2 78.0 56.5 28.3
> 10 mm 188 79.7 97.3 96.7 95 93.8 89.6 82.2
Implant locus 1 (central incisor) 79 33.5 93.6 93.6 92.2 90.8 76.3 70.0
2 (lateral incisor) 38 16.1 92.1 92.1 92.1 88.7 88.7 44.3
3 (canine) 100 42.4 97.0 95.9 93.8 89.4 82.0 63.5
4 (first premolar) 19 8.1 100 100 100 100 100 100