An internal distraction device for midface distraction osteogenesis: The NAVID system type Z'gok. 2020

Yoshiaki Sakamoto, and Teruo Sakamoto, and Takenobu Ishii, and Kazuo Kishi
Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ward, Tokyo 160-8582, Japan. Electronic address: ysakamoto@z8.keio.jp.

Midface advancement with distraction osteogenesis is more routinely used for faciocraniosynostosis. Distraction devices are generally classified into external and internal types. Compared with external distractors, internal distractors are smaller and better tolerated, but their removal is complicated. Here, we introduce a refined internal distraction device and describe its applicability. Unlike the previous anterior fixation plate that utilises screws, the refined internal distraction (type Z'gok) has 3 claws. This anterior point of the distractor is positioned behind the malar eminence, or the lateral orbital wall. Eight patients with syndromic craniosynostosis underwent midface distraction osteogenesis using the type Z'gok between 2016 and 2017 (Z'gok group). Twelve patients were treated using conventional internal distractors (control group). Patient age ranged from 6 to 21 years. Among them, 4 patients underwent Le Fort III distraction osteogenesis, while the others underwent Le Fort IV distraction osteogenesis. The operative time to remove the distractors in the Z'gok group was 65 ± 18 min, shorter than 89 ± 12 min in the control group. The blood loss per kilogram of body weight in the Z'gok and control groups was 3.6 ± 3.3 mL/kg and 4.7 ± 1.7 mL/kg, respectively. In conclusion, the type Z'gok is a reliable and effective internal distractor for midface distraction osteogenesis.

UI MeSH Term Description Entries
D002648 Child A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL. Children
D003394 Craniofacial Dysostosis Autosomal dominant CRANIOSYNOSTOSIS with shallow ORBITS; EXOPHTHALMOS; and maxillary hypoplasia. Crouzon's Disease,Dysostosis, Craniofacial,Craniofacial Dysarthrosis,Craniofacial Dysostosis Syndrome,Craniofacial Dysostosis Type 1,Craniofacial Dysostosis, Type I,Crouzon Craniofacial Dysostosis,Crouzon Disease,Crouzon Syndrome,Craniofacial Dysarthroses,Craniofacial Dysostoses,Craniofacial Dysostosis Syndromes,Craniofacial Dysostosis, Crouzon,Crouzons Disease,Dysarthroses, Craniofacial,Dysarthrosis, Craniofacial,Dysostoses, Craniofacial
D004867 Equipment Design Methods and patterns of fabricating machines and related hardware. Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D005147 Facial Bones The facial skeleton, consisting of bones situated between the cranial base and the mandibular region. While some consider the facial bones to comprise the hyoid (HYOID BONE), palatine (HARD PALATE), and zygomatic (ZYGOMA) bones, MANDIBLE, and MAXILLA, others include also the lacrimal and nasal bones, inferior nasal concha, and vomer but exclude the hyoid bone. (Jablonski, Dictionary of Dentistry, 1992, p113) Bone, Facial,Bones, Facial,Facial Bone
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D012189 Retrospective Studies Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons. Retrospective Study,Studies, Retrospective,Study, Retrospective
D055815 Young Adult A person between 19 and 24 years of age. Adult, Young,Adults, Young,Young Adults
D019340 Osteotomy, Le Fort Transverse sectioning and repositioning of the maxilla. There are three types: Le Fort I osteotomy for maxillary advancement or the treatment of maxillary fractures; Le Fort II osteotomy for the treatment of maxillary fractures; Le Fort III osteotomy for the treatment of maxillary fractures with fracture of one or more facial bones. Le Fort III is often used also to correct craniofacial dysostosis and related facial abnormalities. (From Dorland, 28th ed, p1203 & p662) LeFort Osteotomy,Osteotomy, LeFort,Le Fort Osteotomy

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