Introduction: Guidelines for pediatric mandibular reconstruction (PMR) are not well-established. One must consider the growing craniofacial skeleton, mixed dentition, long-term dental occlusion, need for secondary reconstruction, and speech development. The traditional guideline (bone defect > 5 cm) for use of vascularized bone grafts (VBG) is not applicable given the variation of pediatric mandibular size and growth. We seek to propose a novel algorithm for PMR. Materials and Methods: An Institutional Review Board approved retrospective review of patients who underwent PMR for tumor resections between 2005 and 2019 evaluated patients' demographics, complications, resection index (RI) (resection length to mandibular length), and surgical outcomes. Outcomes based on RI were analyzed to establish guidelines for VBG utilization.Results: Twenty-four patients underwent PMR at a mean age of 9.1 years (range: 1 -18). The mandibular defect (meanAE standard deviation) fornon-VBG (n ¼ 18) and VBG (n ¼ 6) was 6.6 AE 3.0 cm and 12.8 AE 4.3 cm, respectively. The VBG group had fewer return trips to the operating room (P ¼ 0.028) and fewer major complications (P ¼ 0.028). When non-VBG with RI > 32% were compared to <32%, there was statistically less returns to the operating room for complications and a lower rate of early (< 30 days) major complications. Discussion: Our algorithm proposes an RI cutoff of 32% for VBG use for PMR. Patients with a sizable soft tissue defect, previous chemotherapy and/or radiation, planned adjuvant chemotherapy and/or radiation therapy, or a history of failed non-VBG should undergo reconstruction using VBG.
Introduction: Pediatric mandibular reconstruction requires a grafted segment of sufficient height and stability to support dental implant placement. Double barreling and mandibular distraction osteogenesis (MDO) after reconstruction are two techniques to achieve this, but they have only been reported with fibular grafts. Rib grafts not only have a lower donor site morbidity than fibular grafts, but they also provide adequate defect coverage in children. As such, we propose their use with either a double barrel technique or with MDO. Methods: Three pediatric patients underwent mandibular resection and reconstruction using rib grafting. One patient underwent single rib graft placement with subsequent vertical rib distraction. In the remaining two patients, a double-barreled rib technique was used, stacked horizontally in one patient and vertically in the other. Results: From March 2018 to May 2019, three patients with an average age of 11 underwent resection of mandibular tumors or tumor-like lesions followed by immediate reconstruction with rib graft. Due to postoperative wound complications, the graft was completely removed in one patient. The remaining two patients had an uneventful recovery with dental implants planned for one and fully osseointegrated in the other. None of the patients experienced donor-site complications. Conclusion: This case series supports the utility and versatility of autogenous rib grafts as a reconstructive option in children. Not only is rib an excellent bone source with low donor site morbidity, but its height can be augmented through MDO or double barreling, facilitating the successful placement of implants and oral rehabilitation in pediatric patients.
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