Mandibular reconstruction : biomechanical strength analysis (FEM) based on a retrospective clinical analysis of selected patients

• Autorzy: Jędrusik-Pawłowska M. , Kromka-Szydek M. , Katra M. , Niedzielska I.
• Języki publikacji: EN

Abstrakty

EN

Restoration of mandible discontinuity defects continues as a challenge for maxillofacial surgeons. Despite the development of algorithms for reconstruction plates fixation and autogenous grafting techniques, complications are still encountered including screw loosening, bone resorption or delayed/incomplete union. The aim of the study was to analyze the possibility of obtaining bone union in the aspect of biomechanical conditions of two mandible reconstructions using an autogenous iliac crest bone graft stabilized with a reconstruction plate, and to attempt to predict patient outcomes based on strength parameters obtained by the finite element analysis. The authors of the present paper were trying to determine to what extent the reconstruction model and changes occurring in hard tissues of the bone and autogenous graft (simulated by changes in material properties) might help predict individual patient courses. The effort of reconstruction plates was defined using the values of the von Mises stress (σHMH) while the effort of bones was determined based on the values of strain intensity εint. The results of the above mentioned simulations are presented in the form of bar graphs and strain/stress distribution maps. Our strength analyses indicate that uncomplicated healing of grafts fixed with reconstruction plates requires that the initial loading of the stomatognatic system should not result in strain intensity exceeding 20–40 [×10–4]. This range of strain intensity evokes an increase in the mineral phase. The state of nonunion between the mandibular bone and the graft might result from prolonged periods of insufficient loading of the mandible during treatment.

Słowa kluczowe

EN

bone grafts; mandibular reconstruction; finite element method; reconstruction plates; bone healing

PL

kości; metoda elementów skończonych; przeszczep kostny

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2013
• Tom: Vol. 15, no. 2
• Strony: 23--31
• Opis fizyczny: BIbliogr. 24 poz., rys., tab., wykr.

Twórcy

autor

Jędrusik-Pawłowska M.

• Department of Cranio-Maxillofacial and Dental Surgery, Medical University of Silesia, Katowice, Poland

autor

Kromka-Szydek M.

• Department of Experimental Mechanics and Biomechanics, Cracow University of Technology, Poland

autor

Katra M.

• Department of Cranio-Maxillofacial and Dental Surgery, Medical University of Silesia, Katowice, Poland

autor

Niedzielska I.

• Department of Cranio-Maxillofacial and Dental Surgery, Medical University of Silesia, Katowice, Poland

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