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Outcome of tibial plateau fractures managed with calcium phosphate cement
Letters to the Editor
985
screws. As such it is very likely to find a place in clinical practice. However, I wish to query the authors regarding one of their stated formulae. Regarding the ratio method of determining the screw position in the AP and lateral photographs in Fig. 2, the stated formula is AC/AB 100, and this is said to give a value between 0 and 100. Surely, with AC always being more than AB, this value is always going to be more than 100. Do the authors mean their formula to read AB/AC 100?
LETTER TO THE EDITOR
Reference
REPLY TO LETTER TO THE EDITOR
1. The authors have mixed together two entirely different fracture groups with different bone quality, demands, personality, stability and prognosis. 2. Measurement of the amount of depression of a fractured tibial plateau is not a valid way to select the method of treatment or monitor the effects of either closed or open treatment.1,2 Norian SRS cement is known to interfere with radiological evaluation. Also, there is no independent assessor of the radiographs. 3. The inability to gain excellent postoperative reduction (4 of 13 in buttress plating group as opposed to 0 of 13 in SRS group) suggests poor preoperative fracture geometry in buttress plating group and therefore poor outcome. 4. It would be interesting to see how many fractures in the SRS group had associated fibular fractures as an intact fibula provides support to the fractured lateral tibial plateau.
Prediction of fixation failure after sliding hip screw fixation [Injury 2004;35:994—8]
References
1. Pervez H, Parker MJ, Vowler S. Prediction of fixation failure after sliding hip screw fixation. Injury 2004;35:994—8.
A. Kumar Rochdale Infirmary, Whitehall Street, Rochdale OL12 6HW, UK N. Kumar Newcross Hospital, Wolverhampton WV10 0QP, UK 27 September 2004 doi:10.1016/j.injury.2004.12.042
Dear Sir, Thank you for spotting this error. As correctly stated in the letter of Mr. Kumar’s, the ratio should be calculated by AB/AC, not AC/AB as stated in the article. I apologise for any confusion this may have caused. Yours sincerely, M. Parker Peterborough District Hospital Orthopaedic Department, Thorpe Road Peterborough PE3 6DA, UK 17 November 2004
Outcome of tibial plateau fractures managed with calcium phosphate cement Re: Letter to the Editor about an article in Injury 35 (2004) 913—918 I read with interest the article by Simpson et al.3 in the September issue entitled ‘Outcome of tibial plateau fractures managed with calcium phosphate cement’. I have the following concerns about the study.
1. Martin J, Marsh JL, Nepola JVA. Radiographic fracture assessments: which ones can we reliably make? J Orthop Trauma 2000;14(6):379—85. 2. Moore T, Harvey J. Roentgenographic measurement of tibial plateau depression due to fracture. J Bone Joint Surg Am 1974; 56:155—60. 3. Simpson D, Keating JF. Outcome of tibial plateau fractures managed with calcium phosphate cement. Injury 2004; 35:913—8.
M.K. Pimple* Department of Orthopaedics Princess Royal Hospital Haywards Heath RH16 4EX, UK *Tel.: +44 1444 441881; fax: +44 1444 441879 E-mail address: [email protected]
doi:10.1016/j.injury.2004.12.043
DOI of original article: 10.1016/j.injury.2004.12.043
28 September 2004 doi:10.1016/j.injury.2005.01.015
985
screws. As such it is very likely to find a place in clinical practice. However, I wish to query the authors regarding one of their stated formulae. Regarding the ratio method of determining the screw position in the AP and lateral photographs in Fig. 2, the stated formula is AC/AB 100, and this is said to give a value between 0 and 100. Surely, with AC always being more than AB, this value is always going to be more than 100. Do the authors mean their formula to read AB/AC 100?
LETTER TO THE EDITOR
Reference
REPLY TO LETTER TO THE EDITOR
1. The authors have mixed together two entirely different fracture groups with different bone quality, demands, personality, stability and prognosis. 2. Measurement of the amount of depression of a fractured tibial plateau is not a valid way to select the method of treatment or monitor the effects of either closed or open treatment.1,2 Norian SRS cement is known to interfere with radiological evaluation. Also, there is no independent assessor of the radiographs. 3. The inability to gain excellent postoperative reduction (4 of 13 in buttress plating group as opposed to 0 of 13 in SRS group) suggests poor preoperative fracture geometry in buttress plating group and therefore poor outcome. 4. It would be interesting to see how many fractures in the SRS group had associated fibular fractures as an intact fibula provides support to the fractured lateral tibial plateau.
Prediction of fixation failure after sliding hip screw fixation [Injury 2004;35:994—8]
References
1. Pervez H, Parker MJ, Vowler S. Prediction of fixation failure after sliding hip screw fixation. Injury 2004;35:994—8.
A. Kumar Rochdale Infirmary, Whitehall Street, Rochdale OL12 6HW, UK N. Kumar Newcross Hospital, Wolverhampton WV10 0QP, UK 27 September 2004 doi:10.1016/j.injury.2004.12.042
Dear Sir, Thank you for spotting this error. As correctly stated in the letter of Mr. Kumar’s, the ratio should be calculated by AB/AC, not AC/AB as stated in the article. I apologise for any confusion this may have caused. Yours sincerely, M. Parker Peterborough District Hospital Orthopaedic Department, Thorpe Road Peterborough PE3 6DA, UK 17 November 2004
Outcome of tibial plateau fractures managed with calcium phosphate cement Re: Letter to the Editor about an article in Injury 35 (2004) 913—918 I read with interest the article by Simpson et al.3 in the September issue entitled ‘Outcome of tibial plateau fractures managed with calcium phosphate cement’. I have the following concerns about the study.
1. Martin J, Marsh JL, Nepola JVA. Radiographic fracture assessments: which ones can we reliably make? J Orthop Trauma 2000;14(6):379—85. 2. Moore T, Harvey J. Roentgenographic measurement of tibial plateau depression due to fracture. J Bone Joint Surg Am 1974; 56:155—60. 3. Simpson D, Keating JF. Outcome of tibial plateau fractures managed with calcium phosphate cement. Injury 2004; 35:913—8.
M.K. Pimple* Department of Orthopaedics Princess Royal Hospital Haywards Heath RH16 4EX, UK *Tel.: +44 1444 441881; fax: +44 1444 441879 E-mail address: [email protected]
doi:10.1016/j.injury.2004.12.043
DOI of original article: 10.1016/j.injury.2004.12.043
28 September 2004 doi:10.1016/j.injury.2005.01.015