In order to determine how posteroanterior movements (PAs) are related to tenderness and thus possibly symptom production, we measured PA movements to a force of 25N on each side of the cervical spines of asymptomatic subjects. From 10 subjects (six females and four males; mean age 37.2, range 21-50), 10 locations with a difference in tenderness to pressure between sides were used for analysis. The force-displacement and stiffness-force curves for tender and control sides were compared in four ways: simultaneous confidence bands (SCBs) for each side; width of SCBs for each side; SCBs of the difference between pairs of the tender and control curves; and simultaneous prediction bands (SPBs) from the tender side were compared to individual curves of the controls. The tender side demonstrated greater variation of both displacement and stiffness. The tender sides demonstrated greater within-subject stiffness for all force levels above 12N. All individual stiffness-force curves of the tender sides were significantly different from the control side. Expected differences in single measures of either displacement or stiffness were not detected. The results suggest that the pattern of stiffness is a more effective method of characterizing PA mobility than single measures used in previous studies.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.math.2007.09.003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Background: We explored whether the feature aggregation and refinement network (FARNet) algorithm accurately identified posteroanterior (PA) cephalometric landmarks.
Methods: We identified 47 landmarks on 1,431 PA cephalograms of which 1,177 were used for training, 117 for validation, and 137 for testing. A FARNet-based artificial intelligence (AI) algorithm automatically detected the landmarks.
Fragment size of lateral Hoffa fractures determines screw fixation trajectory: a human cadaveric cohort study.
Acta Orthop
June 2024
Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany.
Background And Purpose: Recommendations regarding fragment-size-dependent screw fixation trajectory for coronal plane fractures of the posterior femoral condyles (Hoffa fractures) are lacking. The aim of this study was to compare the biomechanical properties of anteroposterior (AP) and crossed posteroanterior (PA) screw fixations across differently sized Hoffa fractures on human cadaveric femora.
Patients And Methods: 4 different sizes of lateral Hoffa fractures (n = 12 x 4) were created in 48 distal human femora according to the Letenneur classification: (i) type I, (ii) type IIa, (ii) type IIb, and (iv) type IIc.
Adaptation of soft tissue following bilateral sagittal split ramus osteotomy in skeletal class III patients with facial asymmetry: A retrospective study.
J Stomatol Oral Maxillofac Surg
September 2024
Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University, Seoul, Korea; Department of Oral and Maxillofacial Surgery, Seoul National University Dental Hospital, Seoul, Korea; Dental Research Institute, Seoul National University, Seoul, Korea. Electronic address:
Purpose: This retrospective study aimed to evaluate sequential changes in soft tissue thickness after bilateral sagittal split ramus osteotomy (BSSRO) in skeletal class III patients with facial asymmetry and to explore their correlation with surgical movements for optimal postoperative facial symmetry and esthetic outcomes.
Material And Methods: This study included 37 patients with class III malocclusion and > 4 mm Menton (Me) deviation who underwent BSSRO. Posteroanterior cephalograms were captured at preoperative (T0), 6 weeks (T1), 6 months (T2), and 1 year (T3) postoperative intervals to analyze changes in Me deviation, fronto-ramal inclination (FRI), and soft tissue thickness.
A three-dimensional algorithm for precise measurement of human auricle parameters.
Sci Rep
May 2024
Department of Biomedical Engineering and Physics, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands.
Measurement of auricle parameters for planning and post-operative evaluation presents substantial challenges due to the complex 3D structure of the human auricle. Traditional measurement methods rely on manual techniques, resulting in limited precision. This study introduces a novel automated surface-based three-dimensional measurement method for quantifying human auricle parameters.
View Article and Find Full Text PDFNighttime Bracing or Exercise in Moderate-Grade Adolescent Idiopathic Scoliosis: A Randomized Clinical Trial.
JAMA Netw Open
January 2024
Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.
Importance: Moderate-grade adolescent idiopathic scoliosis (AIS) may be treated with full-time bracing. For patients who reject full-time bracing, the effects of alternative, conservative interventions are unknown.
Objective: To determine whether self-mediated physical activity combined with either nighttime bracing (NB) or scoliosis-specific exercise (SSE) is superior to a control of physical activity alone (PA) in preventing Cobb angle progression in moderate-grade AIS.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!