Hard Tissue Defect
Several factors concerning the actual osseous defect must be thoroughly assessed to help formulate a viable treatment plan: Adequate radiographs are necessary to evaluate the full extent of the osseous defect. The site of thedefect may be just as important a’s the size of the defect when dealing with mandibular osseous problems. For example, if the mandibular condyle is missing. treatment is relativelv more difficult. A residual portion of the
ramus with the ‘condyle still attached makes osseous reconstruction easier, because the temporomandibular articulation is-difficult to restore. The mandible has powerful muscles attached to it that usually direct functional movements. When the continuity of the mandible is broken, these muscles no longer work in harmony and may severely displace andibular fragments into unnatural positions. Therefore the position of the residul mandibular fragments must be ascertained. For example, if a portion of the mandible in the area of the molars is missing, the muscles of mastlcation still’ attached to the mandibular ramus may rotat the ramus superiorly and medially, which may allow tration into the oral cavity and compound the difficulty
of planned treatment.