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The full abstract is printed below and we apologise to the authors and readers for this error.
Abstract. The objective of this study was to determine the quality of secondary alveolar bone grafting in the Yorkshire region, and consisted of a retrospective review of patients case notes and radiographs at five surgical units within the Yorkshire region.
The subjects were 109 patients who had secondary alveolar bone grafting between 1.9.91 and 31.8.96. The quality of outcome was assessed using a four-point radiographic scale from occlusal radiographs taken at least 3 months post- operatively: Grade 1 = >75 per cent bony in-fill, Grade 2 = 5075 per cent bony in-fill, Grade 3 = <50 per cent bony in-fill, and grade 4 = no bony bridge.
The radiographic assessment scale was assessed for reliability: inter-examiner weighted kappa = 06220715 and intra-examiner = 08180943. Grade 1 results were achieved in 632 per cent of patients receiving orthodontic expansion and in 40 per cent without expansion before grafting.
The four-point radiographic scale described is a useful tool in assessing alveolar bone grafting. Orthodontic expansion may result in greater degrees of bony in-fill to the alveolar cleft and is a variable that should be examined in future studies.
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