Hedayati Zohreh, Zare Maryam, Bahramnia Fateme
Orthodontic Research Center, School of Dentistry, Shiraz University of Medical Sciences, Ghom Abad, Ghasrodasht, Shiraz 71866-77764, Iran.
Case Rep Dent. 2014;2014:268590. doi: 10.1155/2014/268590. Epub 2014 Oct 16.
Malformed central incisors with poor prognosis could be candidates for extraction especially in crowded dental arches. This case report refers to a 12-year-old boy who suffered from malformed upper central incisors associated with severe attrition. Upper lateral incisors were positioned palatally and canines were rotated and positioned in the high buccal area. The patient had class II malocclusion and space deficiency in both dental arches. Due to incisal wear and malformed short maxillary central incisors and the need for root canal therapy with a major crown build-up, these teeth were extracted. The maxillary lateral incisors were substituted. Thus the maxillary canines were substituted for lateral incisors and the first premolars were substituted for canines. In the lower dental arch the first bicuspids were extracted. Composite resin build-up was performed on the maxillary lateral incisors and canines. This allowed for the crowding and the malocclusion to be corrected. Subsequent gingivectomy improved the patient's gingival margins and smile esthetics one month after orthodontic therapy.
预后较差的畸形中切牙可能是拔牙的候选对象,尤其是在牙弓拥挤的情况下。本病例报告涉及一名12岁男孩,他患有上颌中切牙畸形并伴有严重磨损。上颌侧切牙位于腭侧,尖牙扭转并位于高颊侧区域。患者为安氏II类错牙合,上下牙弓均存在间隙不足。由于切缘磨损、上颌中切牙畸形短小且需要进行根管治疗及大量冠修复,这些牙齿被拔除。上颌侧切牙被替代。因此,上颌尖牙替代侧切牙,第一前磨牙替代尖牙。在下牙弓中,第一双尖牙被拔除。对上颌侧切牙和尖牙进行了复合树脂修复。这使得拥挤和错牙合得以矫正。正畸治疗一个月后,随后的牙龈切除术改善了患者的牙龈边缘和微笑美观度。