Comparison of spontaneous eruption and modified closed eruption technique with palatal traction in alignment of impacted maxillary central incisor teeth

Progress in Orthodontics

Table 1 Assessment of length-to-width ratios and evaluation of the clinical crowns of the teeth

	Ratio	Evaluation
	10:7.8–8.8	Excellent appearance
	10:7.8–8.8	Ideal tooth length-to-width ratio
	10:7.3–7.7	Marred appearance
	10:7.3–7.7	Long clinical crown
	10:8.9–9.5	Adequate appearance
	10:8.9–9.5	Slightly short crown
	10:9.6–11.5	Marred appearance
	10:9.6–11.5	Substantially short crown