6Bergland O, Semb G, Abyholm F. Elimination of the residual alveolar clefts by secondary bone grafting and subsequent orthodontic treatment [J]. Cleft Palate J, 1986, 23 : 175.
7Amanat N, Langdon JD. Secondary alveolar bone grafting in clefts of the lip and palate [J]. J Cranio Maxillo Facial Surg, 1991, 19 : 7.
8Takahashi T, Masayuki F, Yamaguchi T, et al. Use of endosseous implants for dental reconstruction of patients with grafted alveolar clefets [J]. J Oral Maxillofac Surg, 1997, 55 ; 575.
9Perderson S, Enemark H. Reconstruction of alveolar clefts with mandibular or iliac crest bone grafts. A comparative study [J]. J Oral Maxillofac Surg, 1990 , 48(6) : 554-558.
10Borstlap MA, Heidbuche KL, Freihofer HP. Early secondary bone grafting of alveo lar clefts defects [J]. J Craniomaxillofac Surg, 1990,18(50) : 201.