PDF(Pubmed)
Abstract：
Hyperdontia involving the premolar teeth can be single or multiple or even related to a syndrome. These are frequently encountered in permanent dentition, but their occurrence has ranged between 0.09 and 0.64% in the general population. These are commonly found between the permanent canines and first premolars but rarely between the first and second premolars. These are usually eumorphic and can be easily identified as they follow the conventional tooth morphology. These are usually asymptomatic and not easily palpable unless they are very close to eruption. A lingual approach is preferred during their removal over the buccal method as it poses less risk of root trauma. In this case, bilateral accessory premolar tooth buds were present between the first and second premolars. Since the patient was undergoing orthodontic treatment, she was advised to remove these accessory teeth. For their removal, a Neumann flap with a buccal approach was used, which led to fracturing the root apex of the mandibular right second premolar root. On follow-up over the next 1 year, no other complications or secondary tooth germs were observed, and following a period of bone formation, the bone in the affected area formed normally again.
摘要：
牵涉到前磨牙的牙本质可以是单个或多个，甚至与综合症有关。这些在恒牙中经常遇到，但在一般人群中，其发生率为0.09％至0.64％。这些通常在永久性犬齿和第一前磨牙之间发现，但很少在第一和第二前磨牙之间发现。这些通常是全形的，可以很容易地识别，因为它们遵循常规的牙齿形态。这些通常是无症状的，不容易触及，除非它们非常接近喷发。在去除过程中，与颊方法相比，首选舌法，因为它会降低根部创伤的风险。在这种情况下,第一和第二前磨牙之间存在双侧副前磨牙芽。由于患者正在接受正畸治疗，有人建议她拔掉这些副牙。为了他们的移除，使用了带有颊入路的Neumann皮瓣，导致下颌右第二前磨牙根的根尖断裂。在接下来一年的随访中，未观察到其他并发症或继发性牙胚，在一段骨骼形成之后，受影响区域的骨骼再次正常形成。
