Table 2. Daily enamel apposition rates (means ± SD) in inner, central and outer third of the enamel layer in different locations of mandibular first molars of four Soay sheep.

	Lateral enamel, buccal side(mean enamel thickness: 646.6 µm)		Lateral enamel, lingual side (meanenamel thickness: 464.7 µm)		Cervical enamel, buccal side (meanenamel thickness: 615.7 µm)
	Following calceininjection	Followingoxytetracycline injection	Followingcalcein injection	Followingoxytetracycline injection	Followingcalcein injection	Followingoxytetracycline injection
Inner enamel	15.0±2.27 µm	12.3±1.50 µm (82.0%)	11.6±1.17 µm	10.2±0.63 µm (87.9%)	10.3±1.08 µm	8.0±1.57 µm (77.7%)
Central enamel	16.4±1.76 µm	14.0±1.51 µm (85.4%)	12.7±1.10 µm	9.7±1.53 µm (76.4%)	11.1±1.0 µm	10.1±1.48 µm (91.0%)
Outer enamel	17.0±1.08 µm	14.5±1.47 µm (85.3%)	13.4±0.82 µm	10.1±0.55 µm (75.4%)	13.2±1.50 µm	11.4±3.62 µm (86.4%)

The percentages given in brackets in the columns “following oxytetracycline injection” indicate the amount of the respective enamel matrix secretion in relation to that occurring after calcein injection. Values are averages from measurements on the mesial and distal tooth lobes.