The P.F.C. sigma RP-F TKA designed for improved performance: A matched-pair study

Sanjay K. Gupta; Amar S. Ranawat; Vineet Shah; Bashir A. Zikria; Joseph F. Zikria; Chitranjan S. Ranawat

The P.F.C. sigma RP-F TKA designed for improved performance: A matched-pair study

Sanjay K. Gupta, Amar S. Ranawat, Vineet Shah, Bashir A. Zikria, Joseph F. Zikria, Chitranjan S. Ranawat

Research output: Contribution to journal › Article › peer-review

Abstract

The press fit condylar P.F.C. Sigma RP-F (rotating-platform, high flexion) knee is designed to provide a range of motion (ROM) of 155° without compromising wear, polyethylene contact stresses, patellofemoral tracking, or stability. The first 50 TKA surgeries using the Sigma RP-F knee performed at the author's institution were matched to 50 rotating-platform knees for age, sex, body mass index, preoperative diagnosis, duration of follow-up, and preoperative ROM to determine the effect of design on postoperative ROM. The mean increase in active ROM in the Sigma RP-F group was 17°, compared with 6° in the rotating-platform group (P=.0011). The mean increase in active ROM in patients who had less than 120° of preoperative motion was 27° in the Sigma RP-F group, compared with 16° in the rotating-platform group (P=.006). With the new P.F.C. Sigma RP-F design, greater ROM can be achieved independent of preoperative ROM.

Original language	English (US)
Pages (from-to)	S49-S52
Journal	Orthopedics
Volume	29
Issue number	9 SUPLL.
State	Published - Sep 1 2006
Externally published	Yes

ASJC Scopus subject areas

Surgery
Orthopedics and Sports Medicine

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@article{e55c422958ef4dd984a4e42c0ed5a536,

title = "The P.F.C. sigma RP-F TKA designed for improved performance: A matched-pair study",

abstract = "The press fit condylar P.F.C. Sigma RP-F (rotating-platform, high flexion) knee is designed to provide a range of motion (ROM) of 155° without compromising wear, polyethylene contact stresses, patellofemoral tracking, or stability. The first 50 TKA surgeries using the Sigma RP-F knee performed at the author's institution were matched to 50 rotating-platform knees for age, sex, body mass index, preoperative diagnosis, duration of follow-up, and preoperative ROM to determine the effect of design on postoperative ROM. The mean increase in active ROM in the Sigma RP-F group was 17°, compared with 6° in the rotating-platform group (P=.0011). The mean increase in active ROM in patients who had less than 120° of preoperative motion was 27° in the Sigma RP-F group, compared with 16° in the rotating-platform group (P=.006). With the new P.F.C. Sigma RP-F design, greater ROM can be achieved independent of preoperative ROM.",

author = "Gupta, {Sanjay K.} and Ranawat, {Amar S.} and Vineet Shah and Zikria, {Bashir A.} and Zikria, {Joseph F.} and Ranawat, {Chitranjan S.}",

year = "2006",

month = sep,

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language = "English (US)",

volume = "29",

pages = "S49--S52",

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publisher = "Slack Incorporated",

number = "9 SUPLL.",

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T1 - The P.F.C. sigma RP-F TKA designed for improved performance

T2 - A matched-pair study

AU - Gupta, Sanjay K.

AU - Ranawat, Amar S.

AU - Shah, Vineet

AU - Zikria, Bashir A.

AU - Zikria, Joseph F.

AU - Ranawat, Chitranjan S.

PY - 2006/9/1

Y1 - 2006/9/1

N2 - The press fit condylar P.F.C. Sigma RP-F (rotating-platform, high flexion) knee is designed to provide a range of motion (ROM) of 155° without compromising wear, polyethylene contact stresses, patellofemoral tracking, or stability. The first 50 TKA surgeries using the Sigma RP-F knee performed at the author's institution were matched to 50 rotating-platform knees for age, sex, body mass index, preoperative diagnosis, duration of follow-up, and preoperative ROM to determine the effect of design on postoperative ROM. The mean increase in active ROM in the Sigma RP-F group was 17°, compared with 6° in the rotating-platform group (P=.0011). The mean increase in active ROM in patients who had less than 120° of preoperative motion was 27° in the Sigma RP-F group, compared with 16° in the rotating-platform group (P=.006). With the new P.F.C. Sigma RP-F design, greater ROM can be achieved independent of preoperative ROM.

AB - The press fit condylar P.F.C. Sigma RP-F (rotating-platform, high flexion) knee is designed to provide a range of motion (ROM) of 155° without compromising wear, polyethylene contact stresses, patellofemoral tracking, or stability. The first 50 TKA surgeries using the Sigma RP-F knee performed at the author's institution were matched to 50 rotating-platform knees for age, sex, body mass index, preoperative diagnosis, duration of follow-up, and preoperative ROM to determine the effect of design on postoperative ROM. The mean increase in active ROM in the Sigma RP-F group was 17°, compared with 6° in the rotating-platform group (P=.0011). The mean increase in active ROM in patients who had less than 120° of preoperative motion was 27° in the Sigma RP-F group, compared with 16° in the rotating-platform group (P=.006). With the new P.F.C. Sigma RP-F design, greater ROM can be achieved independent of preoperative ROM.

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