Abstract
Treatment of scaphoid fractures continues to be a difficult problem for both acute unstable fractures and non-unions. In our study, the results of a consecutive series of symptomatic non-unions of scaphoid fractures treated with Herbert screw and bone graft during period between July 1996 and June 2000 are studied. Out of a total of 66 patients (one bilateral), 61 (91.04%) cases who had symptomatic non-unions (type D) were treated with Herbert screw plus iliac crest bone graft while 6 (8.95%) cases were treated for acute unstable fractures (type B) with Herbert screw only (these are excluded from the study). All fractures were classified according to Herbert classification. Russe approach was used in 50 patients while dorsal approach was used in 11 cases with proximal pole fracture non-union. The time interval between injury and surgery was 12.2 months (range 2–72 months). Patients were followed up for radiological evidence of union and clinically for range of movement of wrist, grip strength and outcome score. The site of fracture, type, screw placement, the time interval between the original injury and non-union surgery, and age of the patient, were investigated to assess whether they influenced outcome.
Results: Total No. 61 – union 47 (77.1%), persistent non-union 14 (22.9%). We found site of fracture (p=0.044), type of fracture (p=0.028) and screw placement (p=0.019) as statistically significant factors influencing outcome. No statistically significant influence on outcome was found with patient’s age (p=0.983) and also with time interval to non-union surgery (p=0.749). Forty-six (75%) patients were available for clinical follow-up. Seven (15.2%) had persistent non-unions of which four had proximal pole fracture non-unions. Using the scaphoid outcome score, an assessment scale based on pain, occupation, wrist motion, strength and patient satisfaction, functional results were graded as excellent in 19 cases, good in 12 cases, fair in 10 cases and poor in 5 cases. We recommend axial placement of Herbert screw with bone grafting via Russe approach and for difficult proximal pole non-unions dorsal approach is recommended.
The abstracts were prepared by Mr Ray Moran. Correspondence should be addressed to him at Irish Orthopaedic Associaton, Secretariat, c/o Cappagh National Orthopaedic Hospital, Finglas, Dublin 11.
