Comparison of conventional versus computer-navigated acetabular component insertion.

This retrospective study compared the efficacy of computer navigation and conventional freehand techniques to place acetabular component orientation in the target position of acetabular cup inclination of 45 degrees and anteversion of 20 degrees . We selected 69 patients who had undergone total hip arthroplasty with freehand cup insertion who had computed tomography (CT) to plan for acetabular cup placement of the contralateral side. This group was compared with 98 patients who underwent CT-based cup insertion, and all had postoperative CT.

Synovial osteochondromatosis in a 9-year-old girl: clinical and histopathological appearance.

This article reports the clinical and histopathological appearance of synovial osteochondromatosis in the right knee joint of a 9-year-old girl. Initial symptoms such as monoarticular joint swelling led to further diagnostic procedures with the aid of different imaging techniques including X-ray examination and MRI. The definitive diagnosis was based on histopathological findings after performing arthroscopy of the affected joint and the intraoperative appearance of the synovial lesions.

[Computer-assisted navigated cup placement in primary and secondary dysplastic hips].

Aim: The positioning of an acetabular implant has great influence on the range of motion as well as the charger of dislocation of total hip arthroplasty. Using modern CAS systems the reproduction of the cup position after three-dimensional planning based on computed tomography is possible. We investigated the reliability of the position of the acetabular implant in primary and secondary dysplastic cases.

[Sonography and scintigraphy in the diagnosis of cystadenolymphomas (warthin tumor)].

Background: Is scintigraphy in the preoperative diagnosis of cystadenolymphomas dispensable?

Patients And Methods: In this prospective study 35 patients with tumors of the parotid gland were examined sonographically and scintigraphycally and the results were compared with the histological findings.

Results: By means of sonography 88 % (22/25) of the cystadenolymphomas were correctly diagnosed and by means of scintigraphy 80 % (20/25).

Conclusions: Sonography is recommendable as the first-line diagnostic procedure in cystadenolymphomas because it is without radiation load, the free choice of the echographic plane, and it can be repeated as often as desired.

[Value of B-image ultrasound in diagnosis of paranasal sinus diseases in comparison with computerized tomography].

Background: In diagnostic imaging of the paranasal sinuses, the A-mode technique is increasingly being substituted by B-mode ultrasonography. To assess the value of B-mode sonography we compared in a double-blind study computed tomography with our ultrasound findings.

Patients And Methods: Seventy-eight patients were examined by CT and subsequently by ultrasound, two-thirds before endonasal surgery and one-third for diagnosis of serious facial pain and swelling.