蕾状期( bud stage) 胚胎第八周 ■牙板上皮增生,形成上皮芽,形如花蕾 口上皮细胞类似基底细胞,未出现分化。 上皮下方及周围外胚间充质细胞增生。 ■牙弓每个象限内,最先发生的成釉器有4个。 乳牙胚第10周发生,恒牙胚第4个月形成。 Designed and produced by Dr. Wang Li
蕾状期(bud stage) 胚胎第八周 牙板上皮增生，形成上皮芽，形如花蕾。 上皮细胞类似基底细胞，未出现分化。 上皮下方及周围外胚间充质细胞增生。 牙弓每个象限内，最先发生的成釉器有4个。 乳牙胚第10周发生，恒牙胚第4个月形成。 Designed and produced by Dr. Wang Li 16
蕾状期( bud stage) Designed and produced by Dr Wang Li
蕾状期(bud stage) Designed and produced by Dr. Wang Li 17
蕾状期( bud stage) 190 Designed and produced by Dr Wang Li
蕾状期(bud stage) Designed and produced by Dr. Wang Li 上颌突 发育中的 舌 18
蕾状期( bud stage) 190 Designed and produced by Dr. Wangli 19
蕾状期(bud stage) Designed and produced by Dr. Wang Li 19
蕾状期( bud stage) 190 Designed and produced by Dr Wang Li
蕾状期(bud stage) Designed and produced by Dr. Wang Li 牙 蕾 20