[Reduction and osteosynthesis with pin fixation of wrist fractures. A comparative study between Kapandji's and Py's techniques].
METHODS
62 fractures of the distal radius were treated by pin fixation: Kapandji's intra focal pinning in 28 cases (Group "K") and Py's elastic pinning in 34 cases (group "P"). The two groups were comparable as to the type of fractures (Castaing classification). Theoretical principles were analyzed and compared.


RESULTS
Final radiographic results showed the same proportion (75 per cent) of anatomic reduction in both groups. There were 21.4 per cent (6/28) hyporeductions in group K, and 23.5 per cent (8/34) hypereducations in group P. Hyporeduction was moderate with good functional results. Hypereduction in group P was often associated with bad functional results, 5 out of the 6 bad results of all the cases. The functional result, with a follow up of 7 months (4 to 10), was 76 per cent of excellent and good results, 85 per cent in group K, 70 per cent in group P.


CONCLUSIONS
Kapandji's technique seemed more reliable than Py's technique. We propose a technical variation to minimize hyporeduction in Kapandji's technic: increasing the pin's angulation.


CONCLUSIONS
Py's technic conserves one indication: intra operative failure of Kapandji's technique in very osteoporotic bone.
Delattre
O
O
Service de chirurgie orthopédique, Hôpital de la Pitié-Salpêtrière, Paris.
Saillant
G
G
Lemoine
J
J
Benazet
J P
JP
Roy-Camille
R
R
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001858:Bone Nails; D005260:Female; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D005596:Fractures, Closed / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011885:Radius Fractures / Q000601:surgery*; D012189:Retrospective Studies; D014954:Wrist Injuries / Q000601:surgery*
Réduction et synthèse par brochage des fractures du poignet. Etude comparative entre la technique de Kapandji et la technique de Py.