Table 2. Descriptions of implant failure cases.

No.	Sex/age	Implant position	Implant system/length/diameter	Time of implant failure	Reason of failure based on records	Other information
1	F/47	#47	Internal/4.3 × 10 mm	4 yr after implant placement	Implant fixture tearing	No GBR, not immediate, 1-stage
2	F/49	#35	External/4.3 × 11.5 mm	7 months after implant placement	Fibrous encapsulation	No GBR, not immediate, 2-stage
3	M/67	#15	Internal/4.3 × 13.0 mm	4 yr after implant placement	Implant fixture tearing	GBR, not immediate, 2-stage, hypertension
4	M/67	#16	Internal/4.3 × 13.0 mm	4 yr after implant placement	Implant fixture tearing	GBR, not immediate, 2-stage, hypertension
5	M/67	#37	External/5.3 × 13.0 mm	6 months after implant placement	Fibrous encapsulation	GBR, not immediate, 2-stage, hypertension
6	F/47	#27	External/4.3 × 11.5 mm	8 yr after implant placement	Unknown	GBR, not immediate, 1-stage
7	M/50	#35	Internal/4.3 × 8.5 mm	9 yr after implant placement	Peri-implantitis	GBR, not immediate, 1-stage
8	M/56	#16	Internal/4.3 × 11.5 mm	9 yr after implant placement	Implant fixture tearing	GBR, not immediate, 1-stage, hypertension, sinus lateral approach
9	F/47	#46	Internal/5.3 × 10.0 mm	9 yr after implant placement	Peri-implantitis	No GBR, not immediate, 1-stage, hypertension
10	M/54	#26	Internal/4.3 × 11.5 mm	9 yr after implant placement	Peri-implantitis	GBR, not immediate, 2-stage, diabetes, sinus crestal approach

GBR: guided bone regeneration.