Table 2.
Reported cases of radial polydactyly treated with on-top plasty: Functions of the reconstructed thumbs
| Authors | *Arc of MPJ and IPJ | Other described functions and comments |
| Dobyns JH et al 14 | N/A | MPJ instability and weak opposition power required secondary reconstruction. |
| Yen CH et al 15 | N/A | |
| Hasegawa K et al 1 | N/A | Bony union between the graft and recipient was not identified; thumb instability did not occur. |
| Iba K et al 2 | N/A | Both were Wassel type 6 and the graft included MPJ and IPJ. |
| Al-Qattan NM et al 4 | 60,60 | |
| Bell B et al 5 | 60,19 | PedsQL for parents 89, DASH 4.3 |
| Kelly BP et al 6 | N/A | Stiff IPJ, but the thumb was opposable to all four digits. |
| Pons-Riverola A 7 | N/A | Pinch power: 3 kgf (contralateral side: 4 kgf) |
| Hara T et al 8 | 60,0 | Arthrodesis was added eight year after the first surgery. |
| Zhong W et al 9 | N/A | |
| Fang X et al 10 | 75,43 | PedsQL; for child = 85, for parents = 92. |
MPJ: metacarpophalangeal joint
IPJ: interphalangeal joint
PedsQL: Pediatric Quality of Life Inventory
DASH: disability of the arm, shoulder, and hand
* For multiple cases, the average values are reported.