Factors Influencing Resonance Frequency Analysis (RFA) Measurements and 5-Year Survival of Neoss Dental Implants

Table 9

Analyses of implant survival.

Variable	Groups	Implants	Implant failures		CSR (%)	Significance test
		Placed	Overall	Early/late
Age	10–19	7	0	—	100	^(1)
	20–29	7	0	—	100
	30–39	70	2	2/0	97.1
	40–49	186	2	1/1	98.9
	50–59	240	9	5/4	96.3
	60–69	192	7	0/7	96.4
	70–79	38	0	—	100
	80–89	3	0	—	100
Gender	Female	434	13	5/8	97.0	^(2)
	Male	301	7	3/4	97.7
Jaw	Maxilla	368	14	7/7	96.2	^(2)
	Mandible	377	6	1/5	98.4
Position	Anterior	172	7	3/4	95.9	^(2)
	Posterior	572	13	5/8	97.7
Indication	Single	165	5	1/4	97.0	^(1); Post hoc test^(3): Full ≠ partial:
	Partial	452	7	5/2	98.5
	Full	126	8	2/6	93.7
Bone quantity	A	30	0	—	100	^(1)
	B	320	5	4/1	98.4
	C	365	13	4/9	96.4
	D	27	2	0/2	92.6
	E	0	0	—	—
Bone quality	1	37	0	—	100	^(1)
	2	392	11	4/7	97.2
	3	263	8	4/4	97.0
	4	50	1	0/1	98.0
Implant diameter	3.5 mm	155	7	2/5	95.5	^(1)
	4.0 mm	447	10	6/4	97.8
	4.5 mm	122	2	0/2	98.4
	5.0 mm	3	0	—	100
	5.5 mm	15	1	0/1	93.3
Implant length	7 mm	31	1	0/1	96.8	^(1)
	9 mm	176	7	2/5	96.0
	11 mm	202	4	1/3	98.0
	13 mm	198	7	4/3	96.5
	15 mm	128	1	1/0	99.2
	17 mm	7	0	—	100
ISQ at insertion	<50	7	1	1/0	85.7	^(1); Post hoc test^(3): 60–69 ≠ 80–89:
	50–59	32	1	0/1	96.9
	60–69	112	8	1/7	92.9
	70–79	346	9	5/4	97.4
	80–89	158	0	—	100
ISQ at loading	<50	0	0	0/0	—	^(1); Post hoc test^(3): 60–69 ≠ 80–89:
	50–59	6	0	0/0	100
	60–69	95	7	0/7	92.6
	70–79	267	4	0/4	98.5
	80–89	161	1	0/1	99.4

⁽¹⁾Pearson chi-square; ⁽²⁾Fisher’s exact test; ⁽³⁾pairwise Fisher’s exact tests (Bonferroni-corrected significance levels).