Evaluation of the repeat harvest of the central one third of the patellar tendon in a goat model

Grey, Sean G.; McBride, Maj.Jack; Piatt, Bruce E.; Gersoff, Wayne K.; Rodkey, William G.

doi:10.1016/s0749-8063(96)90130-9

Cited by 1 publication

(2 citation statements)

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“…On the other hand, in an experimental model in the goat, designed by Grey et al [11], at 6 months of followup, differences in the histological macrostructure and collagen orientation between the PTDD and control patellar tendon were not found, both groups showing a mature collagen with organized fiber orientation. In contrast, Burks et al [6], in a dog model, found a poorly organized collagen in the area of the healing tendon, similar to our observations, which helps to explain the decreased tensile strength reported by these authors.…”

Section: Discussionmentioning

confidence: 89%

“…Only a few studies have investigated the healing of the PTDD in humans [1,3,7,8,18,20,22,23] as well as in animals [6,11,14,19], and they have been primarily focused on the use of ultrasonography, CT, MRI, and biomechanical testing, rather than on histology. Moreover, little is known about the histologic healing pattern in the PTDD following PTA harvest, above all in the initial stages of the healing process; likewise, the source of recellularization of the defect has not yet been fully investigated.…”

Section: Discussionmentioning

confidence: 99%

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Healing of the patellar tendon donor defect created after central-third patellar tendon autograft harvest

Sanchis-Alfonso

Subías-López

Monteagudo-Castro

et al. 1999

Knee Surgery, Sports Traumatology, Arthroscopy

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Patellar tendon donor defect (PTDD) healing after patellar tendon autograft (PTA), was evaluated in 12 lambs (24 knees), by means of conventional histology, immunohistochemistry and image analysis. The results of this study indicate that the PTDD is replaced by a tissue that does not assume the histological characteristics of a normal patellar tendon. Both the Hoffa fat pad (HFP) and the paratenon play an important role in the healing process, although qualitative and quantitative chronological differences were found, which supports the concept of a "two-time process". The HFP initiates the repair process, and is the main active proliferative tissue compartment during the first week. Once the process is established, the paratenon and, in particular, its synovial lining, starts proliferative activity and virtually substitutes that of the HFP, which rapidly loses activity in a few days. Moreover, donor-site morbidity after PTA could be the result of histological changes in the patellar tendon and environs in only a few cases. We have found inflammatory and neural changes in the refilled PTDD that could explain the anterior knee pain after PTA. Likewise, we have observed loss of Golgi corpuscles in the refilled PTDD, which could lead to proprioceptive loss after ACL reconstruction with PTA. Finally, we have observed shrinkage of the PTDD scar that could contribute to the etiopathogenia of a patella infera.

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Section: Discussionmentioning

confidence: 89%