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Table 4 Data on marginal bone loss distributed by implants in different locations within 3-implant-supported prostheses

From: Difference in marginal bone loss around implants between short implant-supported partial fixed prostheses with and without cantilever: a retrospective clinical study

Follow-upa

n

Mesial implant

Middle implant

Distal implant

p valueb

mean ± SD (min, max)

0–1 year

297

− 0.16 ± 0.35 (− 1.57, 0.66)

− 0.17 ± 0.33 (− 1.29, 0.39)

− 0.13 ± 0.32 (− 2.15, 0.56)

0.600

1–2 years

63

− 0.58 ± 0.66 (− 3.54, 0.52)

− 0.71 ± 0.62 (− 2.47, 0.27)

− 0.59 ± 0.53 (− 2.35, 0.41)

0.301

2–3 years

32

− 0.53 ± 0.54 (− 2.09, 0.31)

− 0.71 ± 0.57 (− 2.72, 0.09)

− 0.56 ± 0.50 (− 1.67, 0.50)

0.345

3–4 years

51

− 0.89 ± 0.87 (− 4.83, 0.24)

− 0.94 ± 0.76 (− 3.28, 0.28)

− 0.87 ± 0.57 (− 2.69, 0.00)

0.842

4–5 years

37

− 1.11 ± 0.73 (− 2.69, 0.18)

− 1.26 ± 0.66 (− 3.36, − 0.21)

− 1.15 ± 0.59 (− 2.61, − 0.32)

0.665

5–10 years

115

− 1.19 ± 0.99 (− 5.25, 0.46)

− 1.21 ± 0.90 (− 3.66, 0.52)

− 1.16 ± 0.74 (− 3,31, 0.23)

0.913

10–15 years

72

− 1.36 ± 0.87 (− 3.30, 0.18)

− 1.65 ± 1.04 (− 4.14, − 0.05)

− 1.70 ± 0.84 (− 3.47, − 0.13)

0.124

15–30 years

72

− 1.70 ± 0.87 (− 4.94, 0.18)

− 1.87 ± 1.12 (− 5.71, − 0.29)

− 1.77 ± 0.90 (− 3.75, 0.00)

0.953

  1. Values in millimeters. Negative values correspond to bone loss
  2. SD standard deviation
  3. aNot all implants had radiological follow-up under all these follow-up periods, and some implants could have had more than one radiological follow-up under the same follow-up period
  4. bComparison of the mean values between implants in different positions; Kruskal–Wallis test