Background
Methods
Choice of model
Procedures
Dual transfer
Empty tunnel and free tendon segment transfers
Single tendon transfers: to cartilaginous apophysis or to ossified calcaneus
Radiography
Histology
Scoring the appearance of the calcanei
Mechanical testing
Pig | Limb | Surgical procedure | Age at surgery (days) | Days post surgery | Evaluation method | Mechanical testing | PCL membrane |
---|---|---|---|---|---|---|---|
1 | R | Dual transfer | 2 | 45 | HE/Faxitron | ||
L | Non-operative control | HE | |||||
2 | R | Dual transfer | 2 | 45 | Faxitron | ||
L | Non-operative control | Faxitron | |||||
3 | R | Dual transfer | 2 | 45 | HE | ||
L | Non-operative control | HE | |||||
4 | R | Dual transfer | 2 | 44 | HE and Faxitron | ||
L | Non-operative control | HE | |||||
5 | R | Dual transfer | 2 | 44 | Faxitron | ||
L | Non-operative control | Faxitron | |||||
6 | R | Dual transfer | 2 | 44 | HE/Faxitron | ||
L | Non-operative control | HE | |||||
7 | R | Empty tunnel | 2 | 23 | Faxitron | ||
L | Non-operative control | Faxitron | |||||
8 | L | Empty tunnel | 0 | 41 | Faxitron | ||
R | Empty tunnel | Faxitron | |||||
9 | L | Free tendon segment | 0 | 41 | Faxitron | ||
R | Empty tunnel | Faxitron | |||||
10 | L | Free tendon segment | 0 | 41 | Faxitron | ||
R | Empty tunnel | Faxitron | |||||
11 | L | Free tendon segment | 0 | 41 | Faxitron | ||
R | Empty tunnel | Faxitron | |||||
12 | L | Free tendon segment | 0 | 41 | Faxitron | ||
R | Empty tunnel | Faxitron | |||||
13 | R | Bone transfer (single) | 2 | 23 | None available for review | Y | |
L | Non-operative control | None available for review | |||||
14 | R | Bone transfer (single) | 0 | 21 | Faxitron/PX | Y | Y |
L | Non-operative control | PX | |||||
15 | R | Bone transfer (single) | 0 | 21 | Faxitron/PX | Y | Y |
L | Non-operative control | PX | |||||
16 | R | Bone transfer (single) | 0 | 21 | PX | Y | Y |
L | Non-operative control | PX | |||||
8 | R | Apophyseal transfer (single) | 2 | 23 | None available for review | ||
L | Non-operative control | None available for review | |||||
10 | R | Apophyseal transfer (single) | 0 | 21 | Faxitron/PX | Y | |
L | Non-operative control | PX | |||||
11 | R | Apophyseal transfer (single) | 0 | 21 | Faxitron/PX | Y | Y |
L | Non-operative control | PX | |||||
12 | R | Apophyseal transfer (single) | 0 | 21 | Faxitron | Y | Y |
L | Non-operative control | PX | |||||
16 | R | Apophyseal transfer (single) | 1 | 30 | Faxitron | Y | |
L | Apophyseal transfer (single) | Faxitron | Y | ||||
17 | R | Apophyseal transfer (single) | 1 | 30 | Faxitron | Y | |
L | Apophyseal transfer (single) | Faxitron | Y | ||||
18 | R | Apophyseal transfer (single) | 1 | 30 | Faxitron | Y | |
L | Apophyseal transfer (single) | Faxitron | Y | ||||
19 | R | Apophyseal transfer (single) | 1 | 30 | Faxitron | Y | |
L | Apophyseal transfer (single) | Faxitron | Y | ||||
20 | R | Apophyseal transfer (single) | 1 | 30 | Faxitron | Y | |
L | Apophyseal transfer (single) | 0 | Faxitron | Y |
Results
Radiography and histology
Normal | Abnormal | Normal | Abnormal | |
---|---|---|---|---|
3–4 Weeks | 3–4 Weeks | 6 Weeks | 6 Weeks | |
Control | 7 | 0 | 6 | 0 |
Empty tunnel | 1 | 0 | 5 | 1 |
Bone tendon transfer (single) with PCL membrane | 3 | 0 | ||
Free FDS segment
|
1
|
3
| ||
Apophyseal tendon transfer (single) with PCL membrane
|
2
|
1
| ||
Apophyseal tendon transfer (single)
|
0
|
10
| ||
Dual transfer
|
2
|
4
|
Normal | Abnormal |
p-Value* | |
---|---|---|---|
Control | 13 | 0 | <0.0001 |
Needle | 6 | 1 | <0.005 |
Bone | 3 | 0 | 0.02 |
Tendon present
| 5 | 18 |