limb lengthening by distraction osteogenesis was fi   fi key words: biomechanics, callostasis, distraction histogenesis, distraction osteogenesis,mechanical strain, osteodistraction, vector   ed the physiologic and mechanical factors governing   successful regeneration of bone formation. distraction osteogenesis is a new variation of more traditional orthognathic surgical procedure for the corr...

BACKGROUND The rate of lengthening has a profound impact on bone regeneration during distraction osteogenesis. Rapid distraction can delay or completely inhibit union, whereas distracting too slowly may lead to premature consolidation. However, the mechanisms responsible for retardation of healing due to rapid distraction have not been elucidated. This study explored whether rapid distraction a...

Alveolar distraction is being used increasingly for alveolar bone reconstruction in patients with severe mandibular defects. When there has been total loss of alveolar bone, distraction of the mandibular basal bone is necessary. Distraction osteogenesis is considerably more challenging in mandibular basal bone than in alveolar bone. The low level of the cut increases the technical difficulty an...

Multisensory interactions have been demonstrated in a distributed neural system encompassing primary sensory and higher-order association areas. However, their distinct functional roles in multisensory integration remain unclear. This functional magnetic resonance imaging study dissociated the functional contributions of three cortical levels to multisensory integration in object categorization...

Radar and audiovisual surveys are important tools for identifying nesting habitat and developing inland conservation strategies for the marbled murrelet (Brachyramphus marmoratus), a threatened seabird that nests in old-growth forests in the Pacific Northwest, USA. Theoretically, counts from these 2 approaches (radar and audiovisual surveys) in different habitats depend on both habitat-specific...

Introduction The rate of lengthening has a profound impact on bone formation during distraction osteogenesis. At optimal rates of distraction, palisades of well-vascularized woven bone fill the distraction gap. However, rapid distraction leads to the formation of granulation tissue, fibrocartilage, and cysts, resulting in nonunion. Previous research has demonstrated that rapid rates of distract...

Distraction osteogenesis is a powerful technique for creating new bone during significant lengthening of the mandible without the need for bone grafting and associated donor site morbidity. The majority of clinical applications of mandibular lengthening with distraction osteogenesis techniques reported in the literature are in growing patients.1-8 For the purposes of this article, an adult pati...

Delayed bone healing during distraction osteogenesis negatively affects clinical outcome. In addition to autologous bone grafting, several mechanical, chemical, biologic, and external treatment modalities may be employed to promote bone growth during distraction osteogenesis in the pediatric patient. Mechanical approaches include compressive loading of the distraction regenerate, increased freq...

The present study aims to assess the incidence of complications related to bone lengthening procedures and to identify factors that may predict these complications. We retrospectively studied 51 lengthening procedures in 39 patients (mean age 13 years) from 2001 to 2015. A circular external fixator was used in 37 procedures and a monolateral fixator in 14 procedures. Duration of distraction, fi...

BACKGROUND/AIMS Healthy individuals demonstrate leftward bias on visuospatial tasks such as line bisection, which has been attributed to right brain dominance. We investigated whether this asymmetry occurred in patients with probable dementia of the Alzheimer type (pAD) which is associated with neurodegenerative changes affecting temporoparietal regions. METHODS Subjects with pAD and matched ...