Table 1.

Summary of data obtained from 24 maxillary fourth premolar teeth of domestic dogs with known or estimated breed, weight and age including mechanical testing performance in terms of maximum force until fracture at a calculated impact angle and resulting fracture type.

Sample	Breed	Weight (kilograms)	Age (years)	Maximum force (N)	Impact angle (°)	Fracture type	Crown height (mm)	Crown diameter (mm)	Crown height to diameter ratio
1	Mixed	< 10	3	916	61.1	UCF	15	11	0.733
2	Mixed	< 10	3	1,334	60.3	UCF	16	11	0.688
3	Beagle	10–14	4	735	62	UCF	16	10	0.625
4	Beagle	10–14	4	1,027	59.1	CCRF	16	10	0.625
5	Beagle	10–14	4	861	58.6	CCF	16	11	0.688
6	Mixed	30–34	8	1,387	62.4	CCF	20	12.5	0.625
7	Mixed	30–34	8	1,349	58	CCF	20	12.5	0.625
8	Staffordshire terrier	25–29	3	1,376	57.4	CCF	21	12	0.571
9	Staffordshire terrier	25–29	3	1,829	67.1	UCRF	21	12.5	0.595
10	German shepherd mix	>34	3	1,312	58.9	CCF	21	11.5	0.548
11	German shepherd mix	>34	3	2,029	58.8	CCRF	21	11.5	0.548
12	Staffordshire terrier mix	>34	1.5	1,682	61.7	CCF	20	10	0.5
13	Beagle	10–14	6	1,553	52.4	CCF	18	11	0.611
14	Beagle	10–14	3	1,454	69.3	CCF	16	10.5	0.656
15	Brittany spaniel	15–19	3	1,422	59.2	CCF	18	11	0.611
16	Hound mix	15–19	3	1,005	64.8	CCF	19	11	0.579
17	Hound mix	10–14	6	1,312	54.4	CCF	18	10.5	0.583
18	Beagle	10–14	7	1,322	62.8	CCF	17	11	0.647
19	Mixed	>34	10	1,889	48.4	CCRF	21	12	0.571
20	Bernese mountain dog	>34	3	306	47.3	CCRF	20	12	0.6
21	Mixed	20–24	3	1,650	61	CCRF	21	12.5	0.595
22	Mixed	15–19	1.5	820	60.7	UCF	18	11	0.611
23	Mixed	20–24	2.5	900	68.1	UCF	22	13	0.591
24	Mixed	15–19	2	1,283	58.4	UCF	19	11	0.579

N, Newton; °, Degree;mm, Millimeter; UCF, Uncomplicated crown fracture; CCF, Complicated crown fracture; UCRF, Uncomplicated crown-root fracture; CCRF, Complicated crown-root fracture.