In addition, cases of pseudotumour have been reported with Co-Cr modular necks subjected to fretting corrosion, which contributed to the fracture in our patient.
Inferior results have been reported with metal-backed Exeter cups in combination with the modular Exeter Universal stem (Hook et al. 2006).
Adverse events and complications associated with modular femoral neck usage are being reported with increasing frequency.
However, this failure mechanism has been reported infrequently, often associated with corrosion at the modular junction, for the similarly designed S-ROM system (DePuy Orthopedics Inc., Warsaw, IN).
At the time of surgery, the neck-body junction was pristine; however, the head-neck junction of the implant demonstrated severe corrosive wear, a problem that has been reported only once previously with this particular bi-modular implant.
Significantly higher in vivo success rates have been reported using OPEN-generated ZFNs, compared with ZFNs generated using the more traditional modular assembly approach [ 32- 34].
Furthermore mechanical failures such as fractures of the modular neck [ 25] and dissociation of modular components [ 26] have been reported in the past.
The modular structure of some MGEs has already been reported in previous studies.
The long-term results with 99% modular neck survival, 100% stem survival, and 94% cup survival after 10 and 12 years are encouraging for this modular neck dual-stem system, and similar to what has been reported in the literature (Schramm et al. 2000, Grubl et al. 2002, Aldinger et al. 2003a, b, Pieringer et al. 2006).
33,205 hip fractures in individuals > 60 years of age treated with modular hemiarthroplasties were reported for the period 2005 2010.
