Division of Rehabilitation Medicine, Gunma University Hospital, Maebashi City, Showa-Machi 3-39-15, Gunma, Japan.
Knee Surg Sports Traumatol Arthrosc. 2012 Dec;20(12):2460-4. doi: 10.1007/s00167-012-1894-9. Epub 2012 Jan 19.
The aim of this study was to determine the prevalence, type of lesion, and depth of osteoarthritic (OA) changes in the patella.
One hundred and forty-six cadaveric knees were included in this study with an median age of 83 years (54-97). Patella OA lesion was classified using Han's method: Type 1, no or minimal lesion; Type 2, medial facet lesion without involvement of the ridge; Type 3, lateral facet lesion without involvement of the ridge; Type 4, lesion involvement of the ridge; Type 5, medial facet lesion with involvement of the ridge, Type 6, lateral facet lesion with involvement of the ridge; and Type 7, Global lesion. The depth of OA evaluation was performed following Outerbridge's classification.
OA lesions were observed as follows: (Type 1) 31%, (Type 2) 16%, (Type 3) 3%, (Type 4) 12%, (Type 5) 22%, (Type 6) 2%, and (Type 7) 14%. Outerbridge's classification of over Grade 2 OA depth was observed in 63.7% of subjects. A significant difference of patella OA type in gender was observed. Severe patella OA occurred in female subjects. Greater depth of OA was observed in Types 5 and 7. Most OA occurred in the medial facet of the patella including the ridge. Isolated OA in the lateral facet of the patella was observed in only 2% of all knees.
There is a risk of patella OA in female subjects. Patella OA occurred mainly on the medial side. Isolated OA in the lateral facet of the patella was rare. 63.7% of subjects had patella OA.
Controlled laboratory study, Level III.
本研究旨在确定髌股关节炎（OA）病变的发生率、病变类型和深度。
本研究纳入了 146 例尸体膝关节，平均年龄 83 岁（54-97 岁）。采用 Han 法对髌股关节炎病变进行分类：1 型，无或轻微病变；2 型，内侧关节面病变不累及嵴；3 型，外侧关节面病变不累及嵴；4 型，病变累及嵴；5 型，内侧关节面病变累及嵴；6 型，外侧关节面病变累及嵴；7 型，全层病变。采用 Outerbridge 分级法评估 OA 深度。
OA 病变如下：（1 型）31%，（2 型）16%，（3 型）3%，（4 型）12%，（5 型）22%，（6 型）2%，（7 型）14%。63.7%的受试者存在超过 Outerbridge 分级 2 级的 OA 深度。性别与髌股关节炎类型存在显著差异，女性更易发生严重的髌股关节炎。5 型和 7 型的 OA 深度更严重。大多数 OA 发生在髌骨关节的内侧，包括嵴部。仅有 2%的膝关节存在孤立的髌骨关节外侧 OA。
女性存在髌股关节炎的风险。髌股关节炎主要发生在膝关节内侧。孤立的髌骨关节外侧 OA 很少见。63.7%的受试者存在髌股关节炎。
对照实验室研究，III 级。
