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Atraumatic patellar prosthesis dislocation with patellar tendon injury following a total knee arthroplasty: a case report.

Singh VK, Singh PK, Singh Y, Singh A, Javed S, Abdunabi M - J Med Case Rep (2010)

Bottom Line: Total knee arthroplasty is a well-established procedure with gratifying results.The patient was treated successfully through a revision of the patellar component and tendon repair.A thorough understanding of knee biomechanics is imperative in performing total knee arthroplasty in order to achieve a better functional outcome and to prevent early prosthetic failure.

View Article: PubMed Central - HTML - PubMed

Affiliation: Luton and Dunstable Hospitals NHS Foundation Trust, Lewsey Road, Luton, LU4 0DZ, UK.

ABSTRACT

Introduction: Total knee arthroplasty is a well-established procedure with gratifying results. There is no consensus in the literature whether to routinely resurface the patella while performing total knee arthroplasty or not. Although an extremely rare occurrence in clinical practice, patellar prosthesis dislocation is a possible complication resulting from total knee arthroplasty.

Case presentation: We report a rare case of atraumatic spontaneous dislocation of patellar prosthesis in a 63-year-old Caucasian man of British origin with patellar tendon injury. The patient was treated successfully through a revision of the patellar component and tendon repair. In two years follow-up the patient is asymptomatic with no sign of loosening of his patellar prosthesis.

Conclusions: A thorough understanding of knee biomechanics is imperative in performing total knee arthroplasty in order to achieve a better functional outcome and to prevent early prosthetic failure.

No MeSH data available.


Related in: MedlinePlus

Extracted patellar prosthesis with cavity in the patellar tendon.
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Figure 3: Extracted patellar prosthesis with cavity in the patellar tendon.

Mentions: He underwent revision surgery of his right knee. Intraoperatively, the prosthesis was noted to have sheared off its fixation pegs and dislocated inferiorly, thus splitting the patellar tendon and forming a pocket in it (Figures 2, 3, 4). The patella was cleaned and the patellar cut was revised to 16 mm and the cemented 38-mm prosthetis was reimplanted with a good patellofemoral tracking (Figure 5). The patella tendon was cleaned and sutured using nylon suture. The postoperative period was uneventful and the patient was subsequently discharged from the hospital. He remains asymptomatic at two years follow-up and showed no evidence of loosening in his prosthesis.


Atraumatic patellar prosthesis dislocation with patellar tendon injury following a total knee arthroplasty: a case report.

Singh VK, Singh PK, Singh Y, Singh A, Javed S, Abdunabi M - J Med Case Rep (2010)

Extracted patellar prosthesis with cavity in the patellar tendon.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2821390&req=5

Figure 3: Extracted patellar prosthesis with cavity in the patellar tendon.
Mentions: He underwent revision surgery of his right knee. Intraoperatively, the prosthesis was noted to have sheared off its fixation pegs and dislocated inferiorly, thus splitting the patellar tendon and forming a pocket in it (Figures 2, 3, 4). The patella was cleaned and the patellar cut was revised to 16 mm and the cemented 38-mm prosthetis was reimplanted with a good patellofemoral tracking (Figure 5). The patella tendon was cleaned and sutured using nylon suture. The postoperative period was uneventful and the patient was subsequently discharged from the hospital. He remains asymptomatic at two years follow-up and showed no evidence of loosening in his prosthesis.

Bottom Line: Total knee arthroplasty is a well-established procedure with gratifying results.The patient was treated successfully through a revision of the patellar component and tendon repair.A thorough understanding of knee biomechanics is imperative in performing total knee arthroplasty in order to achieve a better functional outcome and to prevent early prosthetic failure.

View Article: PubMed Central - HTML - PubMed

Affiliation: Luton and Dunstable Hospitals NHS Foundation Trust, Lewsey Road, Luton, LU4 0DZ, UK.

ABSTRACT

Introduction: Total knee arthroplasty is a well-established procedure with gratifying results. There is no consensus in the literature whether to routinely resurface the patella while performing total knee arthroplasty or not. Although an extremely rare occurrence in clinical practice, patellar prosthesis dislocation is a possible complication resulting from total knee arthroplasty.

Case presentation: We report a rare case of atraumatic spontaneous dislocation of patellar prosthesis in a 63-year-old Caucasian man of British origin with patellar tendon injury. The patient was treated successfully through a revision of the patellar component and tendon repair. In two years follow-up the patient is asymptomatic with no sign of loosening of his patellar prosthesis.

Conclusions: A thorough understanding of knee biomechanics is imperative in performing total knee arthroplasty in order to achieve a better functional outcome and to prevent early prosthetic failure.

No MeSH data available.


Related in: MedlinePlus