Background and purposeThe Lubinus SP II stem is well documented in both orthopedic registries and clinical studies. Worldwide, the most commonly used stem lengths are 150 mm and 170 mm. In 1995, the 130-mm stem was introduced, but no outcome data have been published. We assessed the long-term survival of the Lubinus SP II 130-mm stem in primary total hip arthroplasty.Patients and methodsIn a retrospective cohort study, we evaluated 829 patients with a Lubinus SP II primary total hip arthroplasty (932 hips). The hips were implanted between 1996 and 2001. The primary endpoint was revision for any reason. The mean follow-up period was 10 (5–15) years.ResultsSurvival analysis showed an all-cause 10-year survival rate of the stem of 98.7% (95% CI: 99.7–97.7), and all-cause 10-year survival of the total hip arthroplasty was 98.3% (95% CI: 99.3–97.3).InterpretationExcellent long-term results can be achieved with the cemented Lubinus SP II with the relatively short 130-mm stem. This stem has potential advantages over its 150-mm and 170-mm siblings such as bone preservation distal to the stem, better proximal filling around the prosthesis, and easier removal.

Introduction: The fifth metatarsal diaphyseal fracture is a common fracture. However, clear consensus about the treatment is lacking. Unlike the avulsion fracture or Jones' fracture, literature available on the treatment and long-term outcome of the diaphyseal fracture is scarce. The purpose of this study is to demonstrate a substantial number of conservatively treated patients with persistent pain and to evaluate metatarsal shortening and displacement within this group. Methods: In this retrospective study, 106 patients who had experienced a fifth metatarsal diaphyseal fracture were included and evaluated. The minimum follow-up period was three months. FAAM, AOFAS and NRS scores were used as outcome measurements for function and pain. Length and displacement were analysed on plain X-rays. Results: At least 11% of the patients who received conservative treatment for their fifth metatarsal diaphyseal fracture had persistent pain at least 3 months after initiation of conservative treatment. No relationship has been found between the length of the fifth metatarsal and the FAAM (r( Petrisor et al., 2006) 2 ¼ 0,051), AOFAS (r( Petrisor et al., 2006) 2 ¼ 0,009) and NRS (r( Petrisor et al., 2006) 2 ¼ 0,001).Furthermore, there was no association between patients with a shorter fifth metatarsal and FAAM, AOFAS, NRS, displacement and BMI. Discussion and conclusion: The finding of persistent pain in at least 11% of all patients at long-term follow-up confirms our hypothesis on long-term symptoms. However, the results suggest that these persistent symptoms are not related to metatarsal shortening or displacement.

In this prospective cohort study the 20-year survival rate of the Bi-Metric proximally HA-coated femoral stem was excellent.

It seems justified to conclude that age is not a clinical relevant factor in the indication for femoral neck preserving hip arthroplasty. In this respect, CCD angle seems the most clinical relevant factor. Severe valgus angled hips are not a very suitable indication for femoral neck preserving prosthesis.