My answer is based on the below:
http://ejje.weblio.jp/content/関節面
.
学術用語英和対訳集
関節面
articular surface

http://ejje.weblio.jp/content/脛骨の腓骨関節面
JST科学技術用語日英対訳辞書

脛骨の腓骨関節面
fibular articular surface of tibia; facies articularis fibularis tibiae

http://ejje.weblio.jp/content/不適合
不適合
読み方：ふてきごう
（名詞、形容動詞／ナ形容詞） non-conforming process; noncompliant; incompatible
[PDF]
TEMPOROMANDIBULAR JOINT, DISORDERS AND APPROACHES
File Format: PDF/Adobe Acrobat - Quick View
by S Baskan - Cited by 2 - Related articles
Structural incompatibility of the b. Bony articular surfaces. 2. Muscle contracture a. Myostatic a. Deviation in form b. Myofibrotic i. Disc ii. Condyle ...
diagnosisp.com/dp/journals/view_pdf.php/?journal_id=1...1.

http://www.freepatentsonline.com/y2004/0122519.html
However, a fully non-conforming articulating surface may result in increased contact pressures between the humeral head and glenoid implant because of the relatively small surface area which is in contact therebetween at any point in time. These increased contact pressures may result in permanent deformation of the humeral head and/or articulating surface on the glenoid component over a period of time.

References to “non-conforming articular surfaces” in this PDF file:
http://books.google.com/books?id=hKWvvkwjg14C&pg=PA87&lpg=PA...


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Note added at 39 mins (2011-02-18 00:33:28 GMT)
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Excuse me, I spelled "incompatible" incorrectly in my answer box.

http://hone.ninpou.jp/seikei/oa2.htm
http://ar-ex.jp/sakudaira/study/study_30.htm