Assessment of Maxillary Distraction Forces in Cleft Lip and Palate Patients

摘要: Distraction osteogenesis is a process that depends on biomechanics, where the application of progressive traction forces leads to bone lengthening by gradual new formation. (Illizarov, 1989a, 1989b) Consequently, stretching surrounding soft tissues occurs at different tissue depths, allowing correction severe skeletal dysplasias in short periods time. However, biomechanical data from craniofacial distraction limited and mechanical biological nature involved not fully understood (Gardner et al., 1997). Assessment within structure being distracted may provide current information about response therefore conditions structure, including, premature consolidation, device failure, or existence incomplete osteotomies (Aarnes 1994, Younger 1994). This assessment further lead improved understanding biology distraction, help determine optimum rates rhythms (Samchukov, 1998). Studies have been published during tibia femur using instrumented external fixators conjunction with micrometers goniometers (Evans 1988, Richardson Aronson Similar studies performed animals (Gardner, results obtained these authors are extremely controversial. The great variability devices, complexity methodology employed, site force application, anatomical seem dictate influence. In area, only few examined required lengthen mandible even though measurements were indirectly through measurement torque necessary perform activation distractor (Robinson 2001, Burstain al. 2008). Recently, developed simple mechanism measure adjust maxillary advancement (Suzuki & Suzuki, 2010). was order allow direct forces. Therefore, purpose present study monitor applied cleft lip palate patients this mechamism.