Verma K G, Verma P, Rishi S
Department of Paedodontics and Preventive Dentistry, Surendra Dental College & Research Institute, Sri Ganganagar (Rajasthan), India.
Eur Arch Paediatr Dent. 2012 Feb;13(1):47-9. doi: 10.1007/BF03262841.
Dental abnormalities of tooth number in development of the permanent dentition are quite common; however combined occurrence of hypodontia and hyperdontia is a rare phenomenon, especially when it occurs in the same dental arch and in a non-syndromic situation.
A 15½-year-old non-syndromic male with missing mandibular central incisors and an erupted mandibular mesiodens presented for dental treatment. Intra-oral examination showed reddish, soft, oedematous marginal gingivitis of the molars with absence of stippling. Hard tissue examination revealed the absence of mandibular central incisors bilaterally and presence of a microdont conical shaped supernumerary tooth in the midline. The morphology of clinical crowns of the mandibular incisors and absence of spacing between incisors and canines determined a diagnosis of congenitally missing central incisors.
To ensure optimum function and aesthetics, the patient was advised to have aesthetic rehabilitation for mandibular anterior teeth, but he refused the treatment. Complete scaling and restorations for 16 and 26 were performed.
FOLLOW-UP: The patient was followed every 6 months for two years to assess his oral health status. Oral health remains good but aesthetic restorations have continued to be refused.
This is only the fifth case reported in the dental literature, where the two anomalies manifest in the anterior region of the mandible.
恒牙列发育过程中牙齿数量的异常较为常见；然而，牙量减少和多生牙同时出现是一种罕见现象，尤其是当它们出现在同一牙弓且非综合征性情况下。
一名15岁半的非综合征性男性患者，下颌中切牙缺失且有一颗已萌出的下颌正中多生牙，前来接受牙科治疗。口腔检查显示磨牙区牙龈边缘呈红色、柔软、水肿，无点彩。硬组织检查发现双侧下颌中切牙缺失，中线处有一颗微小锥形多生牙。下颌切牙临床冠的形态以及切牙与尖牙之间无间隙，确定诊断为先天性中切牙缺失。
为确保最佳功能和美观，建议患者对下颌前牙进行美学修复，但他拒绝了治疗。对16和26进行了彻底的洁治和修复。
对患者进行了为期两年的每6个月一次的随访，以评估其口腔健康状况。口腔健康状况良好，但患者仍拒绝美学修复。
这是牙科文献中报道的第五例下颌前部出现这两种异常情况的病例。
