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患者张××,男,22岁,汉族,本院卫生员。1981年5月要求拔除下颌双侧舌向移位牙而来就诊。检查:上下颌已萌出的牙齿共34个,除4(?)4完全移位于正常牙弓之舌侧以外,其余32个牙齿排列整齐,咬合关系除前牙轻度开(牙合)外余牙均属正常。而相当于4(?)4正常位置上的牙齿形态异常,颊尖高大粗壮,与尖牙牙尖十分相似,但整个牙冠的基本形态多似前磨牙,而3(?)3的形态、位置、排列均无异常,该牙为已萌出的变异多生前磨牙。
Zhang × × patients, male, 22 years old, Han nationality, hospital health workers. May 1981 removal of mandibular bilateral mandibular removal of teeth to seek treatment. Check: the teeth of the upper and lower jaw have erupted a total of 34, with the exception of 4 (?) 4 completely shifted outside the lingual side of the normal dental arch, the remaining 32 teeth arranged neatly, occlusal relationship except the anterior teeth slightly open occlusion The remaining teeth are normal. The equivalent of 4 (?) 4 normal position of the tooth morphology abnormalities, buccal tall and stout, and the canine cusps very similar, but the basic shape of the entire crown is more like the premolar, and 3 (?) 3 morphology, location , There is no abnormal arrangement, the teeth have erupted mutation prenatal molar.