Page 152 - Peri-implant health: the effect of implant design and surgical procedure on bone and soft tissue stability

CHAPTER 6
0.26, range 0.00–0.75) for the equicrestally placed implants and 0.16 (SD 0.23, range 0.00–1.00) for the subcrestally placed implants. At 60 months, the mean bleeding on probing of equicrestally and subcrestally placed implants was not statistically significantly different (p = 0.590). The overall mean probing pocket depth based on all implants was 2.04 mm (SD 0.53, range 1.00–3.25), with a mean probing pocket depth of 1.98 mm (SD 0.52, range 1.00–3.00) for the equicrestally placed implants and 2.09 mm (SD 0.55, range 1.25–3.25) for the subcrestally placed implants. At 60 months, the mean probing pocket depth between of equicrestally and subcrestally placed implants was not statistically significantly different (p = 0.257).
Prevalence of Peri-Implantitis
According to the 2017 Consensus report of the World Workshop on the classification of Periodontal and Peri-Implant Diseases and Conditions, the incidence for peri- implantitis in both study populations is 0%. None of the implants showed bone levels ≥ 3 mm apical of the most coronal portion of the intraosseous part of the implant and/or probing pockets depths ≥ 6mm.
If a cross-sectional analyses after 5 years is performed and taking bone loss of 2 mm with bleeding on probing and/or suppuration to define disease as proposed by Klinge and colleagues,16 only one implant in the present study showed a bone level of more than 2 mm in combination with bleeding on probing (Table 2), resulting in a success of 97.9% of all implants, respectively 95.8% for the equicrestally and 100% for the subcrestally placed implants.
Table 2: Implant distribution at 5 years according to mean bone level and mean probing pocket depth; numbers between brackets show implants with bleeding on probing.
Probing pocket depth (mm)
Mean bone level (mm)
<0.5
0.5 - 0.99
1.00 - 1.49
1.50 - 1.99
2.00 - 2.49
≥ 2.5
Total
≤1 1 1 1.1 - 2.0 17 (9) 2 (1) 2.1 - 3.0 17 (8) 4 (2) 3.1 - 4.0 1 (1) 0 4.1 - 5.0 0 0 > 5.0 0 0
Total 36 (18) 7 (3)
0 3 (1) 0 0 0 0 3 (1)
0 0 0 0 0 1 (1) 0 0 0 0 0 0 0 1 (1)
0 2
1 23 (11) 0 22 (11) 0 1 (1) 0 0
0 0
1 48 (23)
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