Views: 1,548 | Downloads:
28
| Responses: 0
| XML | Respond to this article | Alert & updates | Request permissions | Email to a friend |
Original ArticleOpen Access
The Remained Patellar Tendon Strength after Central One Third Removal : A Biomechanical Study
Lairungruang W 
,
Kuptniratsaikul S ,
P
,
Kuptniratsaikul S ,
P WITOON LAIRUNGRUANG, MD*,
SOMSAK KUPTNIRA TSAIKUL, MD**,
PIBUL ITIRA VIVONG, MD**
The study was aimed at comparing the ultimate load bearing capabilities between normal
patellar tendons (control group) and tendons after central one-third removal (removal group). Eleven
fresh Thai cadavers provided study specimens. The average age of the cadavers was 24.86
เธ‘
7.13 years.
Five tendons were used as control specimens and another six tendons underwent central one-third
removal. The lnstron 5583 testing machine and Cooper's technique of measurements were used to test
the ultimate load. Rate of elongation of tendon was set at 500 mm/sec.
The results showed that the removal group cross-sectional area was 48.67 mm
2
or 49.64 per
cent of the control group (98.04 mm2
).
The mean ultimate load of the control group was 4,365.59 N.
The mean ultimate load of the removal group was 2,226.58 N or about 51 per cent. The energy level
to breaking point in the control group was 72.17 J and 32.58 (45.14%) in the removal group. The average
width of the central one-third portion was measured at 8.68
เธ‘
0.56 em.
Generally in a clinical situation, when the ultimate load is reduced to about half in the donor
knee, care must be taken before allowing full weight to bear. Caution should also be emphasized in
cases where a routinely 10 mm wide graft has been taken, as the donor tendon may be weakened by
more than half and may rupture prematurely.
Key word : Patellar Tendon Graft, ACL Reconstruction, Tensile Strength of Patellar Tendon
SOMSAK KUPTNIRA TSAIKUL, MD**,
PIBUL ITIRA VIVONG, MD**
The study was aimed at comparing the ultimate load bearing capabilities between normal
patellar tendons (control group) and tendons after central one-third removal (removal group). Eleven
fresh Thai cadavers provided study specimens. The average age of the cadavers was 24.86
เธ‘
7.13 years.
Five tendons were used as control specimens and another six tendons underwent central one-third
removal. The lnstron 5583 testing machine and Cooper's technique of measurements were used to test
the ultimate load. Rate of elongation of tendon was set at 500 mm/sec.
The results showed that the removal group cross-sectional area was 48.67 mm
2
or 49.64 per
cent of the control group (98.04 mm2
).
The mean ultimate load of the control group was 4,365.59 N.
The mean ultimate load of the removal group was 2,226.58 N or about 51 per cent. The energy level
to breaking point in the control group was 72.17 J and 32.58 (45.14%) in the removal group. The average
width of the central one-third portion was measured at 8.68
เธ‘
0.56 em.
Generally in a clinical situation, when the ultimate load is reduced to about half in the donor
knee, care must be taken before allowing full weight to bear. Caution should also be emphasized in
cases where a routinely 10 mm wide graft has been taken, as the donor tendon may be weakened by
more than half and may rupture prematurely.
Key word : Patellar Tendon Graft, ACL Reconstruction, Tensile Strength of Patellar Tendon
Download:
PDF