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. 2009 Feb 6;18(5):630–653. doi: 10.1007/s00586-008-0879-3

Fig. 4.

Fig. 4

Assessment of construct height. Distance ‘a’ and ‘b’ connect the upper and lower most edges of the vertebral bodies posteriorly and anteriorly, respectively. With the measurements the ratio a:b is calculated to assess changes in construct height during the radiographic course. Distance ‘d’ and ‘e’ resemble the distances between the upper and lower ends of the plate to the respective cervical disc spaces (PDD)