Retrospective study of alveolar ridge preservation compared with no alveolar ridge preservation in periodontally compromised extraction sockets

International Journal of Implant Dentistry

Table 3 Multivariable logistic regression analysis of hard tissue augmentation at implant placement. N/A not available

Variables			Infeasibility of implant placement		Bone augmentation								Implant failure before loading
			Infeasibility of implant placement		Horizontal		Vertical		Sinus floor elevation^a		Total^b		Implant failure before loading
			OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value
Site related	Location	Maxillary anterior	10.32 (1.39–76.43)	0.02	0.19 (0.09–0.39)	< 0.01	0.38 (0.07–1.97)	0.25	-	-	0.20 (0.10–0.42)	< 0.01	N/A^c	N/A^c
		Maxillary posterior	1.642 (0.29–9.40)	0.58	1.03 (0.60–1.78)	0.90	0.25 (0.08–0.76)	0.02	-	-	0.53 (0.32–0.89)	0.02	N/A^c	N/A^c
		Mandibular anterior	N/A^c	N/A^c	0.72 (0.25–2.11)	0.55	N/A^c	N/A^c	-	-	0.68 (0.23–1.97)	0.47	N/A^c	N/A^c
		Mandibular posterior	1	N/A	1	N/A	1	N/A	-	-	1	N/A	1	N/A
	Reason for extraction	Periodontal	0.69 (0.15–3.24)	0.64	1.05 (0.58–1.89)	0.87	0.97 (0.29–3.27)	0.97	1.76 (0.69–4.51)	0.24	1.05 (0.61–1.83)	0.85	0.89 (0.07–11.45)	0.93
		Endo–perio	1	N/A	1	N/A	1	N/A	1	N/A	1	N/A	1	N/A
	Ridge preservation	No	10.28 (1.80–58.69)	0.01	3.68 (2.20–6.14)	< 0.01	15.80 (4.46–56.03)	< 0.01	1.98 (0.91–4.31)	0.09	3.10 (1.93–5.00)	< 0.01	0.28 (0.03–3.14)	0.28
		Yes	1	N/A	1	N/A	1	N/A	1	N/A	1	N/A	1	N/A
Surgeon related		Resident	0.97 (0.18–5.26)	0.97	1.32 (0.77–2.28)	0.32	1.50 (0.54–4.16)	0.44	0.51 (0.20–1.28)	0.15	1.09 (0.65–1.82)	0.75	0.59 (0.07–4.93)	0.63
		Specialist	1	N/A	1	N/A	1	N/A	1	N/A	1	N/A	1	N/A

^aLogistic regression analysis was performed in only maxillary posterior region.
^bTotal GBR means all types of hard tissue augmentation, including horizontal GBR, vertical GBR, or sinus floor elevation.
^cEstimates are not reliable because there were too few observations.