表 5.

修复体崩瓷情况与各因素的关系

The relations between various factors and porcelain fracture

Items	Porcelain fracture	Intact crown	Total	Rate of porcelain fracture	P
Jaw					0.70
Upper jaw	17	103	120	14.2%
Lower jaw	26	166	192	13.5%
Retention modes					0.26
Adhesive retainer	36	241	277	13.0%
Screw retainer	7	28	35	20.0%
Diameter of implants					0.75
3.3 mm	0	5	5	0
4.1 mm	17	98	115	14.8%
4.8 mm	26	166	192	13.5%
Diameter of the neck					0.54
3.5 mm	0	3	3	0
4.8 mm	27	154	181	14.9%
6.5 mm	16	112	128	12.5%
Crown height					0.94
< 5 mm	12	62	74	16.2%
5-10 mm	17	132	149	11.4%
> 10 mm	14	75	89	15.7%
Gender					0.09
Male	26	126	152	17.1%
Female	17	143	160	10.1%
Age/years					0.26
< 45	15	87	102	14.7%
45-59	22	112	134	16.4%
60-74	6	70	76	7.9%