Kim Tae Won, Kim Byung Kag, Kim Dong Whan, Sim Jae Ang, Lee Beom Koo, Lee Yong Seuk
Department of Orthopedic Surgery, Gacheon University Gil Medical Center, Incheon, Korea.
Department of Orthopedic Surgery, The Armed Forces Capital Hospital, Seongnam, Korea.
Knee Surg Relat Res. 2016 Dec 1;28(4):263-269. doi: 10.5792/ksrr.15.051.
The purpose of this study was to evaluate compartmental changes using combined single-photon emission computerized tomography and conventional computerized tomography (SPECT/CT) after open wedge high tibial osteotomy (OWHTO) for providing clinical guidance for proper correction.
Analysis was performed using SPECT/CT from around 1 year after surgery on 22 patients who underwent OWHTO. Postoperative mechanical axis was measured and classified into 3 groups: group I (varus), group II (0°-3° valgus), and group III (>3° valgus). Patella location was evaluated using Blackburne-Peel (BP) ratio. On SPECT/CT, the knee joint was divided into medial, lateral, and patellofemoral compartments and the brighter signal was marked as a positive signal.
Increased signal activity in the medial compartment was observed in 12 cases. No correlation was observed between postoperative mechanical axis and medial signal increase. Lateral increased signal activity was observed in 3 cases, and as valgus degree increased, lateral compartment's signal activity increased. Increased signal activity of the patellofemoral joint was observed in 7 cases, and significant correlation was observed between changes in BP ratio and increased signal activity.
For the treatment of medial osteoarthritis, OWHTO requires overcorrection that does not exceed 3 valgus. In addition, the possibility of a patellofemoral joint problem after OWHTO should be kept in mind.
本研究旨在评估开放性楔形高位胫骨截骨术(OWHTO)后使用单光子发射计算机断层扫描与传统计算机断层扫描相结合(SPECT/CT)的关节间室变化,为适当的矫正提供临床指导。
对22例行OWHTO的患者术后约1年的SPECT/CT图像进行分析。测量术后机械轴并分为3组:I组(内翻)、II组(0°-3°外翻)和III组(>3°外翻)。使用布莱克本-皮尔(BP)比率评估髌骨位置。在SPECT/CT上,将膝关节分为内侧、外侧和髌股关节间室,信号增强处标记为阳性信号。
12例患者内侧间室信号活性增加。术后机械轴与内侧信号增加之间未观察到相关性;3例患者外侧信号活性增加,且随着外翻角度增加,外侧间室信号活性增加;7例患者髌股关节信号活性增加,且BP比率变化与信号活性增加之间存在显著相关性。
对于内侧骨关节炎的治疗,OWHTO需要进行不超过3°外翻的过度矫正。此外,应牢记OWHTO后髌股关节出现问题的可能性。