Parameter Specialists (n [%]) χ2 df P-value
Periodontists
(n = 65)
Oral surgeons
(n = 121)
The need for soft tissue augmentation at the site of the planned implant in an aesthetic zone
A vertical gingival defect 54 (83.1%) 95 (78.5%) 0.553 1 0.457
An interdental papilla and gingival contour defects 54 (83.1%) 79 (65.3%) 6.566 1 0.01a
The vertical gingival thickness is > 2 mm, 4 (6.2%) 7 (5.8%) 0.01 1 0.919
The vertical gingival thickness is < 2 mm 60 (92.3%) 96 (79.3%) 5.257 1 0.022a
The width of keratinized gingiva is > 2 mm 2 (3.1%) 7 (5.8%) 0.674 1 0.412
The width of keratinized gingiva is < 2 mm 58 (89.2%) 107 (88.4%) 0.027 1 0.869
The need for hard tissue augmentation at the site of the planned implant in a non-aesthetic zone
The thickness of the buccal bone wall is < 1 mm 52 (80%) 97 (80.2%) 0.001 1 0.979
Hard tissue defects (intra-socket defects, dehiscence, fenestration), 60 (92.3%) 103 (85.1%) 2.014 1 0.156
Significant or complete loss of one socket bone wall 58 (89.2%) 114 (94.2%) 1.059 1 0.219
The gap between the implant and the socket wall is > 2 mm 54 (83.1%) 99 (81.8%) 0.046 1 0.83

aStatistically significant at P < 0.05 (chi-square [χ2] test).
n = number of respondents; df = degree of freedom.