🔍 Key Findings

• Simulated quadriceps and gastrocnemius forces increased proportionally with axial load in all three femoral fixation models.
• Model 2 (rigid fixation) resulted in subphysiologic quadriceps forces and abnormally high gastrocnemius forces, reducing model fidelity.
• Models 1 and 3 (with hip mobility) produced more physiologic quadriceps and force ratios, especially under 30–40% bodyweight loads.
• Force ratios were significantly lower in rigid fixation (Model 2) compared to hip-mobile models (p = .007), suggesting model design affects simulated muscle coordination.
• Joint angles (stifle and hock) remained within acceptable limits, though slight flexion occurred with increasing load.
• Relative foot position differed by ~3.9 mm between models 2 and 3, with model 2 showing a more caudal position.
• Model 3 preserved benefits of hip mobility while allowing radiographic documentation, making it a preferred setup for future studies.
• The study suggests that models used in feline stifle stabilization research may underestimate physiologic forces, especially with rigid fixation designs.

🔍 Key Findings Summary

• Study Design: Retrospective study of 100 radiographs using in silico and clinical data
• Mean preoperative TPA: 28.6°, higher in small dogs than large (p = .02)
• Mean planned TPA (in silico): 7.6°, not achieving 5° target (p < .01)
• Median postoperative TPA: 5.5° overall; higher in small dogs (7°) vs large (4.5°) (p = .06)
• Postoperative ostectomy position: More distal than recommended; average = 8.6 mm
• Increased distalization → greater under-correction of TPA (p = .01)
• Most accurate correction occurred when ostectomy was ≤7.5 mm from patellar tendon
• Wedge angle categories (TPA-Pre minus 5–2°) were used based on pre-op TPA

🔍 Key Findings

• 2.4 mm LCP with a 1.6 mm IM pin had the highest axial stiffness and yield strength among the tested constructs.
• Axial stiffness was significantly higher in the 2.4 mm LCP + 1.6 mm IM pin group compared to 2.7 mm LCP alone (p = .013).
• No significant difference in torsional stiffness was found among groups.
• 2.4 mm LCP + 1.0 mm pin had the lowest stiffness and failure load, underperforming both other constructs.
• All constructs failed via valgus bending, consistent with clinical observations in feline tibial fractures.
• A 1.6 mm pin (~50% canal fill) resulted in superior construct performance vs. 1.0 mm (~30% fill).
• Group 2 (2.4 LCP + 1.6 mm pin) outperformed the 2.7 mm LCP alone in stiffness, despite using a smaller plate.
• Plate–rod constructs may better preserve periosteal blood supply and support minimally invasive stabilization strategies.

🔍 Key Findings

• Both patient-specific and universal guides yielded correction errors <2°, with no statistically significant difference in accuracy.
• Universal guide corrected aLDFA up to 24° and AA up to 20°, addressing multiplanar deformities effectively.
• Patient-specific guides allowed for preoperative simulation, providing more stable pin placement and potentially aiding less-experienced surgeons.
• Universal guide eliminated the need for CT-based customization, reducing time and cost.
• Cadaver and bone model trials showed consistent accuracy, validating both methods in vitro and ex vivo.
• No significant differences in outcome when correcting uniplanar (aLDFA) vs biplanar (aLDFA + AA) deformities.
• Universal guide's fixed size presented limitations in small dogs, potentially requiring multiple size options.
• Universal guide showed potential for standard use, offering repeatable outcomes with minimal prep despite needing precise intraoperative placement.

🔍 Key Findings Summary

• F + P (forceps + plate compression) achieved the most uniform, high-pressure distribution across all quadrants.
• Kern forceps alone concentrated force in craniomedial quadrant, reducing caudal compression.
• Combining Kern + F improved craniolateral compression but did not restore caudal compression.
• Plate compression alone yielded caudal bias, not uniform pressure.
• Significant inter-method variation in quadrant-specific compression confirmed via ANOVA (p < 0.001 for all quadrants).

🔍 Key Findings

• FGPP (fluoroscopic-guided percutaneous pinning) resulted in successful healing in 10/13 fractures, with good limb function.
• Complications occurred in 5 of 11 cases, including intra-articular implants, malunion, implant failure/nonunion, and implant migration.
• Cases with delayed surgery (>15 days) or radiographic remodeling were more likely to experience major complications.
• Most fractures (10/13) were classified as Salter-Harris type I with mild displacement.
• Median surgical time was 60 minutes, and no conversions to open surgery were needed.
• Postoperative femoral neck resorption was minimal, suggesting possible benefits of the minimally invasive approach for preserving vascular supply.
• One intra-articular pin led to progressive joint disease and required femoral head ostectomy.
• FGPP appears best suited for acute, minimally displaced fractures in young dogs (<8 months) with planned elective explant to avoid growth disturbance.

🔍 Key Findings

Design: In vitro study on cadaveric femurs (n=21) with basilar femoral neck fractures stabilized using 2 vs 3 titanium cannulated screws.

Stiffness: Control > 3-screw > 2-screw (674 > 120 > 90 N/mm).

Yield Load: 3-screw (586 N) > 2-screw (303 N); both < intact femur (2692 N).

Displacement: No difference across groups.

Complication: 3-screw technique more demanding; higher risk of cortical perforation, especially with narrow femoral necks.

Failure Mode: Dislodgement of femoral head + screw shaft bending.

Conclusion: 3 screws = stronger construct than 2 screws. Clinical implications need further study.

🔍 Key Findings

• Mean SI joint reduction was 94.25%, exceeding the 90% target considered important to reduce screw loosening
• Mean sacral width purchase was 82.52%, with all screws achieving >60%—a threshold for reducing implant loosening risk
• All 20 screws were accurately placed within the sacral body, confirmed via CT or radiographs
• A 3D-printed drill guide and table-bound system facilitated consistent screw placement via minimally invasive technique
• Craniocaudal and dorsoventral angles were well controlled (mean CCA = –1.22°, DVA = 0.71°), demonstrating accurate trajectory
• No intraoperative complications were reported; all pilot holes drilled on first attempt
• Use of fluoroscopy and orthogonal imaging enhanced surgical accuracy and reduced malposition risk
• The system permitted screw placement through a sleeve that doubled as a muscle retractor, allowing implant delivery without disruption

🔍 Key Findings

• Both patient-specific and universal guides yielded correction errors <2°, with no statistically significant difference in accuracy.
• Universal guide corrected aLDFA up to 24° and AA up to 20°, addressing multiplanar deformities effectively.
• Patient-specific guides allowed for preoperative simulation, providing more stable pin placement and potentially aiding less-experienced surgeons.
• Universal guide eliminated the need for CT-based customization, reducing time and cost.
• Cadaver and bone model trials showed consistent accuracy, validating both methods in vitro and ex vivo.
• No significant differences in outcome when correcting uniplanar (aLDFA) vs biplanar (aLDFA + AA) deformities.
• Universal guide's fixed size presented limitations in small dogs, potentially requiring multiple size options.
• Universal guide showed potential for standard use, offering repeatable outcomes with minimal prep despite needing precise intraoperative placement.

🔍 Key Findings

Study population: 73 hips from 60 dogs undergoing cementless THR.
Methods evaluated:

• ACVD/ACOLL (acetabular circle on VD or OLL view)
• ALVD/ALOLL (acetabular line)
• FHCVD/FHCOLL/FHCCCHB (femoral head circle)

• Intraobserver repeatability and interobserver consistency were excellent for ACVD and ACOLL.
• FHC methods consistently underestimated actual cup size by 2.4–3.6 mm.
• AC and AL methods had low bias (±0.5 mm) and better predictive value.
• OA severity negatively affected the accuracy of all measurements (p < .05).
• Highest predictive accuracy was ~49% using ACVD with rounding down protocol.