Clinical, microbiological, and immunological aspects of healthy versus peri-implantitis tissue in full arch reconstruction patients: a prospective cross-sectional study

Table 1 Demographic and clinical description of the study population

	Healthy	Peri-implantitis	Differences per group
Age (mean ± s.d.)	63.6 ± 10.4	52 ± 7.7	**
Gender (% females) Number of patients Number of implants	59.1 22 54	53.8 13 24	n.s.
Smoking habit Non-smokers (%)	100.0	38.5	**
Smokers (%)	0.0	61.5
Oral hygiene Never (%)	0	7.7	n.s.
1-2 times/day (%)	63.6	46.2
3 times/day (%)	36.4	46.2
Rehabilitated arch Upper (%)	31.8	38.5	*
Lower (%)	45.5	0
Both (%)	22.7	61.5
Prosthesis¹ Fixed (%)	31.8	38.5	n.s.
OD Locator® (%)	45.5	7.7	*
OD Bar (%)	9.1	38.5	*
Fixed and OD Locator (%)	4.5	0
OD Locator and OD Bar (%)	4.5	7.7
OD Bar and hybrid (%)	4.5	0.0
Hybrid (%)	0.0	7.7

Chi-squared test for evaluating differences in gender and type of prosthesis between groups.
Mann-Whitney U-test for evaluating differences in smoking, brushing and arch between groups.
Student t-test for evaluating age differences between groups.
Note: Only differences in the proportion of the three most frequent types of prostheses are evaluated.
n.s. = nonsignificant.
OD = overdenture; Locator® (Zest Anchors, Escondido, CA, USA).
s.d. = standard deviation.
*p < 0.05; **p < 0.01.

ISSN: 1472-6831