Modified Extended Trochanteric Osteotomy with Preservation of Posterior Structures
Bibliographic record
Abstract
The purpose of the study was to describe the technique and the clinical results of the modified extended trochanteric osteotomy (ETO) with a lateral approach to the hip. This osteotomy differs from those previously described, as it preserves the posterior part of the greater trochanter and its attached external rotators, the aim of this modification being to minimize the rate of hip dislocation. We reviewed the results of 105 extended sliding trochanteric osteotomies performed between January 2000 to January 2008. The indication for surgery was aseptic loosening in 83 cases, periprosthetic fractures in 10 cases, stem fracture in 5 cases, infection in 5 cases and instability in 2 cases. Minimum follow up was 20 months (mean, 65; range, 20–120 months). Mean length of the osteotomy was 17.6 cm (range, 9–30 cm). Mean Harris hip score improved from 39 points preoperatively to 73 at last follow up. Six stems (6%) needed revision for loosening. There was one case (1%) of osteotomy nonunion, and one case (1%) of greater trochanteric fragment nonunion and escape. Four patients (4%) dislocated postoperatively. In conclusion, our series of ETOs reveals a low dislocation rate achieved by preservation of the attachment of the external rotators and posterior capsule, and exhibits a union rate comparable to that of other series. We recommend the use of ETO in revision surgery of cemented stems and cementless well fixed distal ingrowth stems.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".