periodontist

例句：

1. 1. Dr. Smith is a highly respected periodontist in the field.
   史密斯博士是牙周病领域备受尊敬的专家。
2. 2. She underwent a successful tooth extraction and was referred to a periodontist for further treatment.
   她接受了一次成功的拔牙手术，并被推荐给一位牙周病医生进行进一步治疗。
3. 3. The patient's condition required immediate attention from a periodontist.
   患者的病情需要牙周病医生立即关注。