Table 4.

Differences in VAS scores for extraction pain within and among groups of indications for extraction

Indication	Technique	n	Mean	SD	P-value*	Median	χ2	P-value**
Orthodontic teeth	PDLa	5	17.2	4.32	0.012	16	16.292	0.003
	Infiltrationb	5	10.2	1.48		10
	Total	10	13.7	4.78		12
Periodontitis	PDL	24	23	2.93	<0.001	23.5
	Infiltration	9	15.22	2.49		15
	Total	33	20.88	4.48		21
Fractured teeth	PDL	8	20.5	2.2	0.002	20
	Infiltration	7	14.43	3.26		15
	Total	15	17.67	4.1		19
Periapical lesion	PDL	6	21.5	2.59	0.011	20.5
	Infiltration	8	14.25	3.77		13.5
	Total	14	17.36	4.91		17
Profound caries	PDL	12	26.92	2.75	<0.001	26
	Infiltration	26	16.73	3.92		15
	Total	38	19.95	5.97		17
Total	PDL	55	22.8	3.93	0.005	23
	Infiltration	55	15.23	3.86		15
	Total	110	19.01	5.43		19

Notes:

^aExperimental;

^bcontrol;

^*Mann–Whitney;

^**Kruskal–Wallis.

Abbreviations: VAS, visual analog scale; PDL, periodontal ligament.