Atlantoaxial rotatory subluxation/fixation and Grisel's syndrome in children: clinical and radiological prognostic factors.

Atlantoaxial rotatory subluxation/fixation (AARS/F) is a rare cause of torticollis in children. The aim of our study is to investigate all possible clinical and radiological prognostic factors in children with AARS/F. We retrospectively reviewed all cervical spine CT scans of children with AARS/F treated in our Hospital over the last 15 years.

Evaluation of a Novel Cone Beam Computed Tomography Scanner for Bone Density Examinations in Preoperative 3D Reconstructions and Correlation with Primary Implant Stability.

Background: Bone density examination (BDE) using preoperative cone beam computed tomography (CBCT) might be used to predict primary implant stability in implant patients.

Purpose: The aim of the study was to validate a novel CBCT scanner in vitro with regard to BDE in preoperative scans and to analyze the in vivo correlation of CBCT scan results with primary implant stability measurements.

Materials And Methods: A CBCT scanner was validated in vitro with regard to spatial uniformity and linearity of CT numbers (Hounsfield units, HU) by using a series of phantoms and plastic and hydroxyapatite specimens of various densities.

Meniscal allograft transplantation without bone plugs: a 3-year minimum follow-up study.

Background: Meniscal allograft transplantation is a viable option for subtotally meniscectomized and totally meniscectomized symptomatic patients and potentially results in pain relief and increased function.

Hypothesis: The use of a single tibial tunnel arthroscopic technique without bone plugs will reduce symptoms (pain) and improve knee function at a minimum 3-year follow-up.

Study Design: Case series; Level of evidence, 4.

Aggressive fibromatosis of the neck treated with a combination of chemotherapy and indomethacin.

Aggressive fibromatosis (desmoid tumor) of the neck is rare. When feasible, surgery is the best treatment option. However, complete excision with negative margins is not possible in most cases because of the involvement of vascular and nervous structures.

Prospective long-term outcomes of the medial collagen meniscus implant versus partial medial meniscectomy: a minimum 10-year follow-up study.

Background: Loss of meniscal tissue can be responsible for increased pain and decreased function.

Hypothesis: At a minimum 10-year follow-up, patients receiving a medial collagen meniscus implant (MCMI) would show better clinical, radiological, and magnetic resonance imaging (MRI) outcomes than patients treated with partial medial meniscectomy (PMM).

Study Design: Cohort study; Level of evidence 2.