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材料和方法 选取行上颌横向扩大术的20名患者,对40颗上中切牙进行牙周及牙髓状况调查。先行上颌骨LeFort I型骨切开术,再于两上中切牙间行中线纵向骨切开,从后鼻棘向前止于距牙槽嵴10mm处。平行中线骨切开线,于两侧各做2～3条骨切开线,与中线骨切开线相交于牙槽嵴之后。通过鼻底向下加压,扩大上颌至预定位置后,以不锈钢腭托维持,并用小钛板固定。注意腭托不要与粘膜
Materials and Methods Twenty patients undergoing maxillary maxillary augmentation were selected to investigate the periodontal and endodontic status of 40 upper central incisors. First maxillary LeFort I type osteotomy, and then between the two midline incision between the longitudinal bone incision, from the posterior nasal spine to stop from the alveolar ridge at 10mm. Parallel to the midline osteotomy line, on each side of the 2 to 3 bone incision line, and the midline bone incision line after the alveolar ridge. Press down through the bottom of the nose, expand the maxillary to a predetermined position, the stainless steel palate care to maintain and fixed with a small titanium plate. Pay attention to the palate care and mucosa