Logistic Regression Analysis of the Factors Involved in the Failure of Osseointegration and Survival of Dental Implants with an Internal Connection and Machined Collar: A 6-Year Retrospective Cohort Study

Table 1

Descriptive analysis of the failure of osseointegration in order to the analyzed independent variables and survival analysis applying the Kaplan-Meier model.

		Osseointegration
		Total		Yes		No		Kaplan-Meier
		Count	Column; (, %)	Count	Column; (, %)	Count	Column; (, %)	Sig.
Sex	Total	297	100.0%	290	100.0%	7	100.0%
	Male	145	48.8%	139	47.9%	6	85.7%
	Female	152	51.2%	151	52.1%	1	14.3%
Dental arch	Total	297	100.0%	290	100.0%	7	100.0%	0.546
	Upper	160	53.9%	157	54.1%	3	42.9%
	Lower	137	46.1%	133	45.9%	4	57.1%
Implant position in the dental arch	Total	297	100.0%	290	100.0%	7	100.0%	0.070
	Incisive	39	13.1%	38	13.1%	1	14.3%
	Canine	35	11.8%	32	11.0%	3	42.9%
	Premolar	101	34.0%	100	34.5%	1	14.3%
	Molar	122	41.1%	120	41.4%	2	28.6%
Implant length	Total	297	100.0%	290	100.0%	7	100.0%	0.091
	6.0	12	4.0%	12	4.1%	0	0.0%
	8.0	109	36.7%	104	35.9%	5	71.4%
	10.0	118	39.7%	118	40.7%	0	0.0%
	12.0	58	19.5%	56	19.3%	2	28.6%
Implant diameter	Total	297	100.0%	290	100.0%	7	100.0%	0.854
	3.5	98	33.0%	95	32.8%	3	42.9%
	4.0	145	48.8%	142	49.0%	3	42.9%
	4.5	54	18.2%	53	18.3%	1	14.3%
Smooth polished neck height	Total	297	100.0%	290	100.0%	7	100.0%	0.963
	0.7 mm	173	58.2%	169	58.3%	4	57.1%
	1.5 mm	124	41.8%	121	41.7%	3	42.9%
Surgical technique	Total	297	100.0%	290	100.0%	7	100.0%	0.633
	Conventional drilling mature bone	219	73.7%	214	73.8%	5	71.4%
	Postdental exodontia	36	12.1%	34	11.7%	2	28.6%
	Atraumatic sinus lift	17	5.7%	17	5.9%	0	0.0%
	Simultaneous bone regeneration	20	6.7%	20	6.9%	0	0.0%
	Located in previously regenerated bone	5	1.7%	5	1.7%	0	0.0%
Surgical phases	Total	297	100.0%	290	100.0%	7	100.0%	0.479
	One phase	173	58.2%	168	57.9%	5	71.4%
	Two phases	124	41.8%	122	42.1%	2	28.6%
Smoker	Total	297	100.0%	290	100.0%	7	100.0%	0.242
	No	231	77.8%	227	78.3%	4	57.1%
	<10 cig/day	36	12.1%	35	12.1%	1	14.3%
	>10 cig/day	30	10.1%	28	9.7%	2	28.6%
Previous medical conditions	Total	297	100.0%	290	100.0%	7	100.0%	0.498
	No	204	68.7%	200	69.0%	4	57.1%
	Yes	93	31.3%	90	31.0%	3	42.9%
Anticoagulant drugs	Total	297	100.0%	290	100.0%	7	100.0%	0.327
	No	251	84.5%	246	84.8%	5	71.4%
	Yes	46	15.5%	44	15.2%	2	28.6%
Arterial hypertension	Total	297	100.0%	290	100.0%	7	100.0%	0.419
	No	272	91.6%	265	91.4%	7	100.0%
	Yes	25	8.4%	25	8.6%	0	0.0%
Diabetes	Total	297	100.0%	290	100.0%	7	100.0%	0.126
	No	286	96.3%	280	96.6%	6	85.7%
	Yes	11	3.7%	10	3.4%	1	14.3%
Psychoactive drugs	Total	297	100.0%	290	100.0%	7	100.0%	0.419
	No	272	91.6%	265	91.4%	7	100.0%
	Yes	25	8.4%	25	8.6%	0	0.0%
Bisphosphonate drugs	Total	297	100.0%	290	100.0%	7	100.0%	0.702
	No	291	98.0%	284	97.9%	7	100.0%
	Yes	6	2.0%	6	2.1%	0	0.0%