Table 4.

Age and type of bone graft

Ages	20–29	30–39	40–49	50–59	60–69	70–79	>80	Total
No bone graft	23	34	49	135	88	51	14	394
GBR	9	26	32	53	47	10	3	180
Sinus lifting	1	22	30	59	51	12	0	175
BBG	6	3	7	15	12	0	0	43
Total	39	85	118	262	198	73	17	792
% of BG	41.0	60.0	58.5	48.5	55.6	30.1	17.6	50.3

Ages years old, GBR guided bone regeneration, BBG block bone graft, BG bone graft