作者对多孔羟基磷灰石(HA)骨代用品在正颌外科手术植入后的变化做了组织学和组织定量分析。手术方式包括上颌下降、前移、后退和扩展,下颌前移、颏加高术。从愈合良好的9例病人获取17块活检标本,病人平均年龄28岁,手术间隔4.7～16.4个月,平均9.3个月,取活检的部位包括上颌骨壁11块,牙间区3块, The authors made a histological and tissue quantitative analysis of the changes of porous hydroxyapatite (HA) bone substitutes after orthognathic surgery. Surgical methods include maxillary descent, advancing, retreating and expanding, mandibular advancement, chin augmentation. Seventeen biopsy specimens were obtained from 9 well-healed patients. The mean age was 28 years. The operative interval was 4.7-16.4 months (average 9.3 months). The biopsy sites included 11 maxillary walls, 3 interdental areas,