🔍 Key Findings

• Two-pin fixation had significantly greater strength (639 N) than single-pin fixation (426 N) in TTAF models (p = .003).
• Stiffness was also higher with two-pin constructs (72 N/mm vs 57 N/mm); statistically significant (p = .029).
• Both fixation types withstood loads greater than quadriceps force in dogs at a walk (240 N), indicating clinical viability.
• Failure was most commonly due to pin bending or pullout (82%), with fewer cases of ligament tearing or epiphyseal fracture.
• K-wire insertion angle (KWIA) did not significantly differ between fixation types (p = .13).
• Single larger pins delivered ~68% of the strength and ~83% of the stiffness of two smaller vertically aligned pins.
• Clinical implication: Two vertically aligned pins are biomechanically superior for TTAF fixation in canine models.
• Study used mature cadavers, which may underestimate loads and stiffness compared to immature clinical cases.

🔍 Key Findings

Study size: 105 dogs (73 ORPS; 32 MIPO)

MIPO vs ORPS differences:

• Surgical time: MIPO median 130 min vs ORPS 85 min (p < .001)
• Explant rate: MIPO 25% vs ORPS 4.1% (p = .003)
• Time to clinical union: MIPO 85 days vs ORPS 57 days (p = .010)
• Frontal alignment deviation: MIPO 3.5° vs ORPS 2.0° (p = .047)
• Comminution more frequent in MIPO (41% vs 16%; p = .012)

Significant predictors for MIPO use: More proximal fracture margin (p = .004), surgeon identity (p < .001)

No significant difference: Sagittal alignment, radial length, union rate, or complication rate by surgeon

Implant preference: Fixin plates used in 84% of MIPO; locking plates more common in ORPS

🔍 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

• COR of elbows with FMCP was significantly more caudal compared to normal elbows, based on CT-derived geometry.
• In normal elbows, 74% of medial and 93% of lateral axes exited cranial and distal to the epicondyles.
• In FMCP elbows, 81% of medial and 70% of lateral axes exited caudal and distal to the epicondyles.
• Different landmark combinations produced slightly different COR approximations, especially between humeral vs. radius/ulna-based axes.
• The medial-lateral axis using trochlea and capitulum centers provided the most consistent COR approximation.
• COR estimations based on diseased elbows may not match normal joint geometry, impacting implant alignment accuracy.
• External epicondylar landmarks may be useful intraoperatively to estimate COR location, but variability limits precision.
• Drill diameter size may buffer small COR differences, but impact in advanced disease or bilateral cases remains unclear.

🔍 Key Findings

• Fewer R1 margins (tumor on ink) were achieved in mast cell tumors (MCTs) when using 6–10 mm lateral margins versus 0–5 mm (7% vs. 55%; _P_ = .049).
• For soft tissue sarcomas (STSs), no benefit was seen in margin completeness between 0–5 mm vs. 6–10 mm lateral margins (41% vs. 43% R1).
• Overall R1 rates were 26% for MCTs and 42% for STSs following PNE.
• R scheme (“tumor on ink” = R1) had better interobserver agreement (83%) compared to ≤1 mm margin criteria (68% agreement).
• Complication rate was moderate (26%), but no surgeries required revision.
• Local recurrence/metastasis occurred in 14% of dogs, with 60% of those having R1 margins.
• Adjunctive therapy was considered clinically indicated in 46% of 0–5 mm margin cases vs. 24% of 6–10 mm cases.
• Histologic grade and tumor size were not predictive of margin completeness.

🔍 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

• Fluoroscopically guided normograde metabone pinning (FGNMP) was used to treat 17 animals (15 dogs and 2 cats) with 57 metabone fractures, including various fracture configurations (short-oblique body, physeal, and comminuted).
• All 57 fractures were stabilized using intramedullary pins via FGNMP. The study exclusively focused on pin fixation and did not include screws or combined fixation techniques.
• Median surgical time was 54 minutes (range 26–99 min), indicating efficient procedural execution.
• Radiographic bone union was achieved in all fractures, with a median time to union of 6 weeks (range 4–12 weeks). Union was confirmed in all initially non-united fractures on follow-up.
• No major complications were reported. A single pressure sore at the olecranon resolved uneventfully, and no pin migration or osteomyelitis was observed.
• Pin extensions were noted radiographically (e.g., 42% distal subchondral overextension), but were not associated with clinical problems.
• Fluoroscopic guidance improved implant accuracy and preserved soft tissue, enabling effective fracture alignment and stabilization using this minimally invasive osteosynthesis (MIO) approach.
• The authors concluded that FGNMP is an effective, safe, and minimally invasive method for a variety of metabone fracture types, yielding quick recovery, fast healing, and good to excellent long-term functional outcomes in all 17 cases.

🔍 Key Findings

• Compared unilateral plating (UP) vs orthogonal plating (OP) with 2.0, 2.4, and 3.0 mm plates (OP2.0, OP2.4, OP3.0).
• Model: acetal homopolymer (Delrin) rod with 29 mm fixed fracture gap, loaded axially (4–196 N, 90,000 cycles).
• OP constructs had 2.5–4.1x higher strength and 3.0–4.2x higher stiffness than UP constructs (p < .0002).
• UP had 3.5–4.1x higher gap strain than OP groups (p < .0075).
• All OP groups exceeded 1000 N max load before failure (vs 424 N for UP).
• Greater implant size in OP groups further increased performance.
• All constructs survived fatigue loading; 3.5 mm plates showed deformation, especially UP; OP plates remained intact.

🔍 Key Findings

• No significant difference in peak load, failure load, stiffness, or 3 mm gap formation among bone tunnel types.
• Transverse tunnel (TT) constructs had 25% higher yield load than modified tunnels (MT) (P = .027).
• Most common failure mode was suture pull-through (67%), with no significant difference between groups.
• Gap formation ≥3 mm occurred in ~90% of constructs; no significant difference in force needed for gap among groups.
• All bone tunnel techniques (TT, VT, MT) are viable options for CCT reattachment in dogs.
• The 3-loop pulley (3LP) pattern provided strong, uniform repair, with higher loads to failure than previously reported.
• TT constructs showed more tendon distortion at the repair interface during loading.
• Inclusion of accessory tendon may have improved repair strength compared to prior studies using GT alone.

🔍 Key Findings

• Lateral humeral condylar fractures (LHCF) were most common, comprising 63.6% of cases.
• Transcondylar screw (TCS) + K-wire(s) fixation had a 7.62x higher risk of major complications compared to other methods (p = .009).
• All cases of TCS migration occurred in the TCS + K-wire group; none occurred with plate fixation.
• Overall complication rate was 40.9%, with 29.5% being major and requiring intervention.
• Contralateral humeral intracondylar fissures (HIF) were found in 58.1% of French Bulldogs with CT data.
• No significant association between age and presence of HIF, but fissure length increased with age (R = 0.47, p = .048).
• Younger, lighter dogs had higher complication and screw migration rates, possibly due to softer bone and smaller condyles.
• TCS + plate fixation had the lowest complication rate, suggesting biomechanical superiority.