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Distraction Lengthening of the Apert Thumb

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Background: The thumbs of patients with Apert syndrome are characteristically short and radially deviated, contributing to functional hand impairment. The authors report a two-staged technique for distraction lengthening of the… Click to show full abstract

Background: The thumbs of patients with Apert syndrome are characteristically short and radially deviated, contributing to functional hand impairment. The authors report a two-staged technique for distraction lengthening of the Apert thumb using a robust cohort of pediatric patients. Methods: The authors retrospectively reviewed medical records of pediatric patients with Apert syndrome who underwent thumb distraction lengthening between 1999 and 2019. The technique was two-staged: (1) application of uniplanar distractor and phalangeal osteotomy, followed by (2) distractor removal, bone grafting, and fixation. Clinical records, preoperative and postoperative radiographs, and photographs were reviewed. Results: Twenty-two patients (41 thumbs) with Apert syndrome were identified and treated (mean age at initial distraction, 11.5 years). A mean distraction gap of 31.3 mm was achieved over a median time of 40.0 days. The mean healing index was 26.3 days per centimeter. The thumbnail complex was lengthened a median length of 3.0 mm. The median follow-up time was 5.0 years, with complications occurring in 36.4 percent (eight out of 22) of patients. A delayed bone union occurred in one patient, and rotational malunion occurred in one patient. Conclusion: Although long-term outcomes data are needed, thumb distraction lengthening following syndactyly release in patients with Apert syndrome is safe and should be considered to augment the overall appearance and functionality of the hand. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.

Keywords: apert syndrome; lengthening apert; distraction; distraction lengthening; apert thumb; thumb distraction

Journal Title: Plastic and Reconstructive Surgery
Year Published: 2022

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