Medial joint space width and convergence angle change with time after medial opening-wedge high tibial osteotomy.
Knee
; 27(6): 1923-1930, 2020 Dec.
Article
em En
| MEDLINE
| ID: mdl-33221690
ABSTRACT
BACKGROUND:
Although the medial joint space width (MJSW) is commonly used for radiographic evaluation of knee osteoarthritis, the changes in knee joint space width (JSW) during weight bearing after medial opening-wedge high tibial osteotomy (MOWHTO) remain unclear. This study aimed to depict how medial and lateral JSWs and convergence angles change gradually after MOWHTO.METHODS:
We retrospectively followed up 81 MOWHTO cases for over 45 months on average. Pre- and postoperative mechanical axes were recorded. The JSWs and convergence angles were measured preoperatively, immediately postoperatively, and 3-6, 9-12, and 21-24 months postoperatively. Patient-reported outcomes were measured using a visual analogue scale (VAS).RESULTS:
The mean mechanical femoral-tibial angle improved from 8.1° varus to 2.4° valgus. At the aforementioned times, the respective mean values of MJSW were 2.6, 3.5, 3.8, 4.0, and 4.2 mm; mean convergence angles were 4.8°, 2.9°, 2.2°, 2.1°, and 1.9°; and the mean VAS scores were 7.2, 7.8, 4.8, 1.4, and 1.3. The MJSW continued to increase significantly in the first year postoperatively and then plateaued for a minimum of 2 years follow up after MOWHTO. The convergence angle decreased significantly in the first 6 months postoperatively and was then maintained.CONCLUSIONS:
The MJSW, convergence angle, and VAS scores continued to improve through weight bearing during the first year after MOWHTO and were maintained for at least 2 years. Thus, JSW measurement may be an easy and representative way of radiographically monitoring the effect of MOWHTO.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Osteotomia
/
Tíbia
/
Suporte de Carga
/
Osteoartrite do Joelho
/
Articulação do Joelho
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
Aspecto:
Patient_preference
Limite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Knee
Assunto da revista:
ORTOPEDIA
Ano de publicação:
2020
Tipo de documento:
Article