The statistical shape model as a quality assurance measure in the treatment of complex midface fractures: a case control study

Background Complex bilateral midface fractures necessitate a surgically challenging procedure to preserve or restore the occlusion and the sensitive eye area. In this case control study, we aim to show the potential of a statistical shape model (SSM) for measuring the quality of the midface reconstruction, compared to the estimated preoperative situation. Methods An individualized SSM was postoperatively registered on 19 reconstructed complex bilateral midface fractures. Using this SSM, the distances from the simulated preoperative situation to the postoperative positions of the fracture segments were calculated. The fracture lines for Le Fort II, Le Fort III, and NOE fractures were chosen as reference points for the distance measurements. Results The SSM could be registered on all 19 complex bilateral midface fractures. All analyzed fractures showed a dorsal impaction (negative values) of the midface. Le Fort II fractures showed deviation values of –0.98 ± 4.6 mm, Le Fort III fractures showed values of –3.68 ± 3.6 mm, NOE type 2 fractures showed values of –0.25 ± 4.6 mm, and NOE type 1 fractures showed values of –0.25 ± 4.6 mm. Conclusions The SSM can be used to measure the quality of the achieved reduction of complex bilateral midface fractures based on the estimated preoperative situation. Trial registration DRKS00009719.

Management of midface fractures: maxilla

Maxillary fractures can be classified according to fracture pattern as described by the Le Fort classification. These are usually high-energy injuries and there are often other facial injuries associated with these fractures that need to be identified and managed in addition to the treatment of the fracture itself. Fracture treatment is by reduction and stabilization, usually with internal fixation. Complications of the injury and treatment are discussed in this chapter

Principles of Internal Fixation in Maxillofacial Surgery

Since past many years management of facial trauma has evolved greatly. To provide stable fixation various plating system have been developed. To reconstruct the chin and mandibles, craniofacial skeleton surgery and midface fractures, the maxillofacial plating system is designed. There are various forms of plates and screws for fixation of maxilla, mandible and midface including fractures of orbit and zygoma. They also involve plates for mandibular reconstruction after tumor resection. Different sizes and shapes of plates are available as per the needs.

Shaping of comminuted midface fractures with stock Titanium mesh: a technical note

Multiply fragmented fractures of the maxillofacial region are difficult to fix with traditional miniplate osteosynthesis because of the extremely small size of fragments, complex three-dimensional anatomy, thin bone unable to hold screws and multidirectional pull of muscles. We intend to present a technical note on a case series of extremely comminuted midfacial fractures reconstructed with stock Titanium mesh, cut to shape and used to mold the small fragmented segments into the shape of the facial bones. Severe fragmentation of midface leads to facial hollowing, tissue prolapse and asymmetry even after major facial buttresses are fixed and reconstructed. Simple stock Titanium mesh can be used to reconstruct these severe fragmentations of thin bones of the midface as shown in the series and avoid late and unsightly complications.

Comparison of the mechanical properties of biodegradable and titanium osteosynthesis systems used in oral and maxillofacial surgery

To guide the selection of osteosynthesis systems, this study compared the mechanical properties of biodegradable and titanium osteosynthesis systems. SonicPins Rx and xG were subjected to pull-out tests. Additionally, 15 biodegradable (Inion CPS 2.0 and 2.5 mm; LactoSorb 2.0 mm; Macropore 2.0 mm; Polymax 2.0 mm; BioSorb FX 2.0 mm; ResorbX 2.1 mm; Osteotrans-MX 2.0 mm with plate thicknesses 1.0 and 1.4 mm; SonicWeld Rxplate/Rxpins, xGplate/Rxpins and xGplate/xGpins 2.1 mm without and with tapping the burr hole) and six titanium (CrossDrive (2006), CrossDrive (2018), MaxDrive; all 1.5 and 2.0 mm) straight, four-hole osteosynthesis systems were evaluated. All systems were subjected to tensile, bending and torsion tests. Pull-out loads of the SonicPins were comparable (P = 0.423). Titanium systems’ tensile loads were higher than biodegradable systems (P < 0.001). CrossDrive (2018) and MaxDrive systems’ tensile and torsional stiffness were lower, accompanied with higher ductility, than corresponding CrossDrive (2006) systems (P < 0.001). Bending stiffness of 1.5 mm titanium systems was comparable to, and of the 2.0 mm systems higher than, all biodegradable systems (P < 0.001). Regarding biodegradable systems, Inion CPS 2.5 mm had highest tensile load and torsional stiffness, SonicWeld 2.1 mm highest tensile stiffness, and BioSorbFX 2.0 mm highest bending stiffness (P < 0.001). On the basis of the results of this study, the CrossDrive (2018) and MaxDrive 1.5 mm titanium systems are recommended for midface fractures (e.g., zygomatic or maxillary fractures) and osteotomies (e.g., Le Fort I osteotomy), and the CrossDrive (2018) and MaxDrive 2.0 mm titanium systems for mandibular fractures and osteotomies when a titanium osteosynthesis system is used. When there is an indication for a biodegradable osteosynthesis system, the SonicWeld 2.1 mm or BioSorbFX 2.0 mm are recommended for midface fractures and osteotomies, and the Inion CPS 2.5 mm biodegradable system for mandibular osteotomies and non-load bearing mandibular fractures, especially when high torsional forces are expected (e.g., mandibular symphysis fractures).

Facial Trauma Patterns Among Young Athletes

Study Design: Retrospective case series review. Objective: Participation in athletics is common in high school and college students and presents an increased risk of injury in this age-group. Previous studies have included National Collegiate Athletic Association athletes but not high school athletes. Here we report the trends of maxillofacial injuries in high school students. Methods: Patients presenting to a level 1 trauma center with maxillofacial injuries were identified by chart query with associated International Classification of Diseases, 10th Revision codes for facial fractures between October 2015 and October 2017. Data collected included age, sport, fracture type, need for surgery, associated concussion, and time to return to play were measured. New York State Public High School Athletic Association regional high school sports participation data from 2016 to 2018 were used to calculate incidence. Results: A total of 33 patients aged 13 to 19 years were identified. Baseball, basketball, and lacrosse were most frequently associated with maxillofacial trauma. Annual incidence rates for mandible fractures in high school athletes were 0.037%, 0.012%, and 0.01% for lacrosse, baseball, and basketball, respectively. Annual fracture incidence rates for midface fractures in high school athletes were 0.17%, 0.018%, and 0.01% for baseball, lacrosse, and basketball, respectively. Conclusion: Maxillofacial fractures are uncommon injuries among athletes but present with serious implications including surgical correction. Baseball was strongly associated with midface fractures despite being considered a noncontact sport. Improved facial protection across all sports will be imperative at reducing the incidences of these injuries. Level of Evidence: Level 4.