Outcome in 12 Dogs with Chronic Radiographic Cranial Tibial Subluxation after Tibial Plateau Leveling Osteotomy (2019-2021)

Table 1

Objective and subjective data for twelve dogs with chronic cranial tibial subluxation after TPLO.

Dog	Signalment	Procedures	History (preoperative)	Contralateral CrCL rupture	Buttress/drawer/thrust/lameness grade (preoperative)	OA grade (osteophytosis/effusion) preoperative	Persistent lameness/complications (postoperative)	Lameness grade and long-term exam	OA grade (osteophytosis/effusion) long term
1	3 yr. MC Coonhound	R TPLO and medial meniscectomy	RPL  yr.	Yes: L TPLO one year prior	+/+/+ grade 3/5 RPL lame	2/3	MRSP implant infection	RPL and LPL lameness, mild drawer bilateral, grade 4/5	3/2
2	2 yr. MC Great Pyrenees	R TPLO and medial meniscectomy	RPL  mo.	No	+/+/+ grade 2/5 RPL lame	2/3	None	No lameness, mild drawer bilateral	2/1
3	2 yr. MC English Bulldog	R TPLO and medial meniscectomy	RPL  mo.	Yes: current medical management	+/+/+ grade 2/5 RPL lame	2/2	None	No lameness, mild drawer bilateral	2/1
4	6.5 yr. MC Pitbull Terrier	L TPLO and medial meniscectomy	LPL  mo. (2 mo. NWB)	Yes: TPLO 2 years earlier	+/+/+ grade 3/5 LPL lame	2/3	None	No lameness, mild drawer bilateral	2/1
5	9 yr. MC Labrador Retriever	R TPLO and medial meniscectomy	RPL  yr. (progressive past 1 yr.)	No	+/+/+ grade 3/5 RPL lame	2/3	None	Not performed	N/A
6	2 yr. MC Labrador Retriever X	R TPLO and medial meniscectomy	RPL  yr.	Yes: L lateral years prior	+/+/+ grade 3/5 RPL lame	2/3	MRSP surgical site infection	Not performed	N/A
7	11 yr. MC Pitbull Terrier	R TPLO and medial meniscectomy	RPL  mo.	Yes: L TPLO 6 months after R TPLO	+/+/+ grade 3/5 RPL lame	2/3	Acute lameness 2 weeks after surgery, improved with antibiotics	Not performed	N/A
8	5.5 yr. MC Pitbull Terrier	R TPLO	RPL  mo.	Yes: L TPLO 6 months after R TPLO	+/+/+ grade 2/5 RPL lame	2/3	None	Not performed	N/A
9	6 yr. MC Great Pyrenees X	L TPLO and medial meniscectomy	LPL  mo.	Yes: R TPLO 2 years earlier	+/+/+ grade 3/5 LPL lame	2/3	None	Not performed	N/A
10	5 yr. MC Labrador Retriever X	L TPLO	LPL  yr.	Yes: current medical management	+/+/+ grade 3/5 LPL lame	2/3	None	Not performed	N/A
11	9.5 yr. FS Australian Cattle Dog	L TPLO and medial meniscectomy	LPL  mo.	No	+/+/+ grade 3/5 LPL lame	2/3	None	Not performed	N/A
12	11 yr. MC Pitbull Terrier	R TPLO and medial meniscectomy	RPL  mo.	Yes: L TPLO 1 year earlier	+/+/+ grade 3/5 RPL lame	2/3	None	Not performed	N/A

Note: CrCL: cranial cruciate ligament; R: right; L: left; OA; osteoarthritis; yr.: year; MC: castrated male; TPLO: tibial plateau leveling osteotomy; RPL: right pelvic limb lameness; LPL: left pelvic limb lameness; MRSP: methicillin-resistant Staphylococcus pseudintermedius; mo.: month old; N/A: not applicable; NWB: non-weight-bearing. Lameness was graded on a five-point scale. OA and effusion were graded on a three-point scale. Data were collected from medical records from the preoperative and postoperative period as well as surgery reports.