Stability of the skeletal segments repositioned during orthognathic surgery is still a concern in maxillofacial surgery. In an attempt to establish a consensus about one of the most frequently performed repositioning surgeries, the literature from 1985 to 1999 concerning stability of Le Fort I osteotomy in maxillary advancement was reviewed. There have been many problems in interpreting the results of the analysis because of differences in the design of the studies and the multifactorial nature of the disorder. For this reason each problem that emerged in the literature is analyzed and discussed.