Predicting early endodontic treatment failure following primary root canal treatment

BMC Oral Health

Table 1 Demographic and clinical characteristics of the patients (n = 175)

Variables	Categories	n
Age	Mean (SD) in years	48.75 (16.1)
	< 35 years	33
	35 ≤ < 60 years	100
	≥ 60 years	42
Sex	Female	99
	Male	76
Tooth type	Anterior	30
	Premolar	31
	Posterior	114
Tooth location	Maxillary	91
	Mandibular	84
Periapical diagnosis	Symptomatic apical periodontitis (SAP)	81
	Asymptomatic apical periodontitis (AAP)	30
	Acute apical abscess (AAA)	12
	Chronic apical abscess (CAA)	50
Periapical radiolucency	No (PAI score = 1, 2)	36
	Yes (PAI score = 3, 4, 5)	139
Preoperative pain	None	41
	Pain or discomfort on biting/tenderness to percussion	69
	Pain triggered spontaneously	26
	Both spontaneous pain and pain on biting	37
	Pain or discomfort triggered by thermal stimulation (by hot food)	2
Type of coronal restoration	Resin	27
	Amalgam	7
	Crown	140
	Temporary filling state	1
Time that has passed since the initial treatment (years)	< 5	65
	5 ≤ < 10	31
	10 ≤	79
Reasons for visit	Pain or discomfort on biting/tenderness to percussion	39
	Spontaneous pain	14
	Both spontaneous pain and pain on biting	26
	Persistent pain or discomfort on percussion after primary RCT	20
	Sinus tract	47
	Gingival swelling	11
	Other reasons	18

Other reasons for visit included an increase in the size of the periapical lesion (n = 1), a defective restoration with or without secondary caries (n = 9), secondary caries (n = 6), crown fracture (n = 1), and an old crown that had fallen out (n = 1)
Only one reason for the visit was noted

ISSN: 1472-6831