Osteosynthesis Of Distal Radius Fractures Research Articles

Relationship between Physical Characteristics and Morphological Features of the Articular Radius Surface: A Retrospective Single-Center Study.

Preoperative planning is important for the osteosynthesis of distal radius fractures. Challenges arise for patients presenting with bilateral wrist injuries or a history of contralateral wrist injuries. In such cases, the estimation of the distal radius morphology and the determination of the plate size from the preoperative physical characteristics could prove beneficial. The objective of this study was to investigate the correlation between the physical characteristics and the morphology of the distal radius articular surface. A total of 79 wrist computed tomography (CT) images (41 women and 38 men) were evaluated. Physical characteristics, such as height, weight, and body mass index (BMI), were recorded. Three-dimensional CT analysis was performed to investigate the transverse and anteroposterior diameters of the distal radius. Pearson's correlation coefficient was used to assess the relationships between height, weight, and BMI and the transverse and anteroposterior diameters of the distal radius. A moderate to strong correlation was found in the overall analysis between body height and transverse diameter (r = 0.66). There were also moderate correlations between body height and anteroposterior diameter (r = 0.45) as well as weight and transverse diameter (r = 0.41), both of which were statistically significant (p < 0.001). Our findings indicate a statistically significant correlation between height, weight, and morphology of the distal radius. When analyzed by sex, the correlation between body height and the transverse diameter of the distal radius was found to be relatively strong in women (r = 0.47, p = 0.002), suggesting that it could be a useful indicator for preoperative planning, such as estimating plate size.

Comparison of time-efficiency of individually wrapped screws and sterile screw racks in distal radius fracture treatment.

Time-efficiency of individually wrapped screws versus screws in a screw rack is not well established. We performed a prospective single-center clinical study timing the interval between the surgeon asking and receiving a screw during plate and screw osteosynthesis of distal radius fractures. Patients were randomized for individually wrapped screws or screws in a screw rack. The study was conducted in a Level 1 Trauma Center and surgeries were performed between March and June 2023. Average handling time for screws from a screw rack was 9 s (SD 5.5; range 3-28) and 22 s for individually wrapped screws (SD 6.1; range 6-38). This average difference of 13 s is significant (p < 0.0001). There is a significant increase in handling time using individually wrapped screws over using a screw rack. Level I (therapeutic, randomized controlled trial).

Influence of Surgeon's Expertise on the Duration of Approach and Closure during Osteosynthesis of Distal Radius Fractures

Abstract Background The aim of this study was to determine whether the duration of the approach (PII) and closure (PV) phases for minimally invasive plate osteosynthesis (MIPO) of distal radius fractures varied according to the surgeon's level of expertise. The main hypothesis was that the PII or PV duration was inversely proportional to the level of expertise. Methods The method measured the duration of PII and PV for 50 videos of MIPO operated by one surgeon with level 3E expertise, three with level 4E, and one with level 5E. The videos were viewed to identify any technical errors. Results The average PII duration was 3 minutes 8 seconds for level 5E, 4 minutes 7 seconds for 4E, and 6 minutes 19 seconds for 3E. Average PV duration was 2 minutes 12 seconds for level 5E, 2 minutes 36 seconds for 4E, and 2 minutes 41 seconds for 3E. The average duration of PII + PV was 5 minutes 20 seconds for level 5E, 6 minutes 37 seconds for 4E, and 9 minutes for 3E. These findings indicate that both PII and PV duration was the longest in the level 3E surgeons' practice. Six technical errors were identified for levels 3E and 4E during PII (hemostasis control, multiple incisions, instrument handling, improper use of the fluoroscope, time-outs) and PV (intradermal reattachment). Clinical Relevance The main hypothesis was verified since the duration of PII or PV was inversely proportional to the surgeon's level of expertise. This study identified technical errors in hand surgery practices of new surgeons. By early identification and correcting these minor errors, it would be possible to speed up the learning curve. We recommend surgical videos to be systematically recorded and analyzed to improve hand surgery practices. Type of Study/Level of Evidence Therapeutic/Level IIIa.

Three-Dimensional Analysis of Polyaxial Volar Locking Plate Position for Distal Radius Fracture

Abstract Background To avoid screw penetration into the joint when using the polyaxial volar locking plate (VLP) for osteosynthesis of distal radius fractures, it is important to note that the optimal screw insertion angles depending on the plate positions. Purpose The purpose of this study was 2-fold: first, to evaluate the differences of the most distal plate position where the screw does not penetrate into the joint in the three-dimensional (3D) radius models; second, to evaluate the relationship between the plate position and the transverse diameter of the distal radius. Patients and Methods Thirty plain X-rays and computed tomography (CT) scans of healthy wrists were evaluated. The transverse diameter was measured on plain X-rays. 3D radius models were reconstructed from CT data. A 3D image of polyaxial VLP was used to investigate the most distal plate position at three different screw insertion angles. The linear distance between the volar articular edge and the plate edge was measured and compared among different screw insertion angles. The correlations between the plate positions and the transverse diameter were also evaluated. In addition, the relationship between the most distal screw place and articular surface was confirmed with one case of distal radius fracture. Results The optimal positions relative to the neutral were 2.7 mm proximal in the distal swing and 1.9 mm distal in the proximal swing. The linear distance was significantly correlated with the transverse diameter in each group. It was confirmed that the relationship between the most distal screw place and articular surface was applicable in the actual case. Conclusion The results showed that the most distal position of the polyaxial VLP differed depending on the screw insertion angle and became more proximal as the transverse diameter increased. These results may be useful as a reference for preoperative planning. Levels of Evidence III.

Is a Novel Fluoroscopic Intraoperative Reference System Superior to Conventional Management for Distal Radius Fracture Reduction? A Propensity-matched Comparative Study.

Is a Novel Fluoroscopic Intraoperative Reference System Superior to Conventional Management for Distal Radius Fracture Reduction? A Propensity-matched Comparative Study.

The relationship between plate prominence and need for removal after volar plate osteosynthesis of distal radius fractures.

This study aimed to assess the incidence of plate-related complications and the need for plate removal after volar plate osteosynthesis of the distal radius in relation to Soong classification. All consecutive patients (age > 16years) in our level II trauma center treated with plate osteosynthesis for distal radius fractures from January 2017 until June 2019 were retrospectively evaluated. The main outcome measures were volar plate positioning according to Soong classification and incidence of plate removal. In addition, the incidence of tendon ruptures, reasons for volar plate removal, and improvement of complaints after removal were evaluated. The overall incidence of plate removal in the 336 included patients was 16.9% (n = 57). Removal incidence in Soong 2 plates (28.2%) was significantly higher compared to Soong 0 and 1 plates (8.0% and 14.4%, respectively), P = 0.003. Multivariable binary logistic regression analysis showed Soong grade 2 as an independent predictor for plate removal, OR 4.3 (95% CI 1.4-13.7, P = 0.013). Four cases of flexor and four cases of extensor tendon rupture were reported, all in Soong 2 grade plating. The main reasons for volar plate removal were pain (42%) and reduced functionality (12%). In cases where pain was the main reason for removal, 81% of patients reported a decrease in pain during follow-up after surgery. This study suggests an association between plate prominence graded by Soong and plate removal using a single plating system. Plate prominence should be reduced in volar plating whenever technically feasible.

Adjuvant Arthroscopy Does Not Improve the Functional Outcome of Volar Locking Plate for Distal Radius Fractures: A Randomized Clinical Trial

To evaluate the outcomes of adding arthroscopy to osteosynthesis of distal radius fractures (DRF) with volar locking plate (VLP), by Patient-Rated Wrist Evaluation (PRWE) 1 year after surgery. In total, 186 functionally independent adult patients who met the inclusion criteria (DRF and a clinical decision for surgery with a VLP) were randomized to arthroscopic assistance or not. Primary outcome was PRWE questionnaire results 1 year after surgery. For the main variable, PRWE, we obtained the minimal clinically important difference based on a distribution-based method. Secondary outcomes included Disabilities of the Arm, Shoulder and Hand and 12-Item Short Form Health Survey questionnaires, range of motion, strength, radiographic measures, and presence of joint step-offs by computed tomography. Data were collected preoperatively and at+1 and+4 weeks,+3 and+6 months, and+1 year after surgery. Complications were recorded throughout the study. In total, 180 patients (mean age: 59.0 ± 14.9 years; 76% women) were analyzed by modified intention to treat. A total of 82% of the fractures were intra-articular (AO type C). No significant difference between arthroscopic (AG) and control (CG) groups in median PRWE was found at+1 year (median AG: 5.0, median CG: 7.5, difference in medians 2.5; 95% confidence interval [CI] -2.0, 7.0, P= .328). The proportion of patients who exceeded the minimal clinically important difference of 12.81 points in the AG and CG was 86.4% vs 85.1%, P= .819, respectively. Percentage of associated injuries and step-offs reduction maneuvers was greater with arthroscopy (mean differences: 17.1 95% CI -0.1, 26.1, P < .001) and 17.4 (95% CI 5.0, 29.7, P= .007). The difference in percentage of residual joint step-offs at the postsurgical computed tomography in radioulnar, radioscaphoid, and radiolunate joints was not significant (P= .990, P= .538, and P= .063). Complications were similar between groups (16.9% vs 20.9%, P= .842). Adjuvant arthroscopy did not significantly improve PRWE score+1 year after surgery for DRF with VLP, although the statistical power of the study is below the initially estimated to detect the expected difference. Level I, randomized controlled trial.

Relative Increase in Distal Radius Exposure with Extension of the FCR Approach.

Major surgical approaches for volar plating of the distal radius include the standard flexor carpi radialis (FCR) approach, the extended FCR (eFCR) approach, and the extended FCR approach combined with radial-sided carpal tunnel release (eFCR+CTR). The purpose of this study was to determine which of these three surgical approaches offers the greatest exposure and visualization of the distal radius. Sequential dissections were performed on each of 30 fresh frozen below elbow cadaveric samples in order to simulate the three surgical approaches for distal radius volar plating, starting with the standard FCR approach, advancing to eFCR, and finishing with eFCR+CTR. Prior to the initial dissection of each cadaveric sample, radiographs were taken in order to calculate the total area of the distal radius. Then, following each sequential dissection, photographs were taken of each specimen and analyzed with an image measuring software in order to obtain the area of distal radius exposed. The percentage of total distal radius exposure was then calculated for each of the three surgical approaches. The eFCR+CTR approach offered the greatest average distal radius exposure at 87% of total distal radius visualized. The eFCR approach provided the next greatest exposure with an average of 73% visualized, followed by the standard FCR approach with an average of 61% visualized. The extended FCR approach with radial-sided carpal tunnel release is both safe and efficacious for osteosynthesis of distal radius fractures in the setting of concomitant carpal tunnel syndrome. This study demonstrates that an additional advantage of this approach includes improved surgical exposure and visualization of the distal radius. This surgical approach is a valuable addition to any upper extremity surgeon's armamentarium and should be considered when treating difficult distal radius fractures.

The preliminary stage in developing an artificial intelligence algorithm: a study of the inter- and intra-individual variability of phase annotations in internal fixation of distal radius fracture videos

Aim: As a preliminary stage in the development of an artificial intelligence (AI) algorithm for surgery, this work aimed to study the inter- and intra-individual variability of phase annotations in videos of minimally invasive plate osteosynthesis of distal radius fractures (MIPO). The main hypothesis was that the inter-individual variability was almost perfect if Cohen's kappa coefficient (k) was ≥ 81% overall; the secondary hypothesis was that the intra-individual variability was almost perfect if the F1-score (F1) was ≥ 81%. Methods: The material comprised 9 annotators and three annotated MIPO videos with 5 phases and 4 sub-phases. Each video was presented 3 times to each annotator. The method involved analysing the inter-individual variability of annotations by computing k and F1 from a reference annotator. The intra-individual variability of annotations was analysed by computing F1. Results: Annotation anomalies were noticed: either absences or differences in phase and sub-phase annotations. Regarding the inter-individual variability, an almost perfect agreement between annotators was observed because k ≥ 81% for the three videos. Regarding the intra-individual variability, F1 ≥ 81% for most phases and sub-phases with the nine annotators. Conclusion: The homogeneity of annotations must be as high as possible to develop an AI algorithm in surgery. Therefore, it is necessary to identify the least efficient annotators (measurement of the intra-individual variability) to provide them with individual training and a personalised annotation rhythm. It is also important to optimise the definition of the phases, improve the annotation protocol and choose suitable training videos.

Routine X-Rays after the Osteosynthesis of Distal Radius and Ankle Fractures.

The utility of routine x-rays after the osteosynthesis of distal radius fractures and ankle fractures is questionable. We performed a trial to determine whether such x-rays are justified in patients who have undergone standardized imaging with C-arm fluoroscopy during surgery. Patients requiring surgery for a distal radius fracture or an ankle fracture were candidates for inclusion in this prospective, randomized, controlled, non-blinded trial. Standardized intraoperative images were obtained with C-arm fluoroscopy and stored at the end of the operation. The next day, patients in the control group underwent imaging with a standard postoperative x-ray, while those in the intervention group did not. The primary endpoint was a change in the treatment plan, defined as additional imaging or a second operation. The secondary endpoints included the range of motion, pain as rated on the Visual Analog Scale, and a functional outcome analysis (PRWE/FAOS). 316 patients were included in the trial (163 in the control group, 153 in the intervention group), of whom 202 (64%) had radius fractures and 114 (36%) had ankle fractures. The treatment plan changed in twelve patients (3.8%; four in the control group and eight in the intervention group), seven of whom (2.2%; three in the control group and four in the intervention group) underwent a second operation. The frequency of changes in the treatment plan and of reoperations was comparable in the two groups (p = 0.36). On follow-up at six weeks and one year, the results with respect to functional outcomes and pain were comparable. In this trial, routine postoperative x-rays after the osteosynthesis of distal radial fractures and ankle fractures did not improve the care of patients who had undergone standardized intraoperative imaging.

Relationship between surgeons’ position and the duration of the procedure during minimally invasive osteosynthesis of distal radius fractures

This study aimed to assess the influence of the surgeon’s position on procedure time in MIPO (Minimally Invasive Plate Osteosynthesis) for distal radius fracture. The hypothesis was that there was a correlation between procedure time and the surgeon’s position in relation to the operated side. Thirteen surgeons (12 right-handed, 1 left-handed) operated on 421 distal radius fractures: 208 right-sided (R) and 213 left-sided (L). Surgeons stood either at the patient's head (H) or the feet (F). Procedure time and scar size were measured. Regardless of operated side (right or left), mean surgery time was 35.5 min (range, 14–71) with the surgeon at the head and 40.5 min (range, 11–119) with the surgeon at the feet. The difference (5 min) was statistically significant. When the right side was operated on, surgery time was 34.2 min (range, 14–66) with surgeon at the head and 41.1 min (range, 11–86) at the feet. The difference (6 min) was statistically significant. No other comparisons were significant. There was no correlation with surgeon’s experience. Given that 1 min of operating room time costs between €10.80 and €29, savings of €54 to €145 per procedure can be achieved. The study hypothesis was confirmed, with a correlation between the surgeon's position in relation to the operated side and the duration of the operation. In conclusion, we recommend that surgeons position themselves at the patient’s head for of distal radius fracture MIPO.

Preoperative Predictions of Distal Screw Length for the Osteosynthesis of Distal Radius Fractures.

Background: The objective of this study was to clarify whether anteroposterior dimension of the radius along the screw axis of a fixed angle volar locking plate (VLP) can be predicted from the width of the radius on the VLP. Methods: Sixty-nine wrists in 68 patients with distal radius fractures that underwent fixation with a fixed angle VLPs were evaluated. All patients underwent pre- and postoperative computed tomographic scans of the distal radius. The transverse width of the radius was measured at the position of the third screw hole from the proximal edge. The anteroposterior dimension of the radius (R) was measured along the axes of the distal screws. The distal row screw holes were defined as R1, R2, R3, and R4 from the radial to the ulnar side. Correlation analysis between the width and the anteroposterior dimension, and single regression analysis were performed for each screw hole. The correlations amongst the R values for the different distal row screws were also assessed. Results: The correlation coefficients between the transverse width and anteroposterior dimensions were 0.54, 0.58, 0.55, and 0.42 for R1, R2, R3, and R4 respectively (p < 0.05). The regression equations were R1 = 0.49W + 7.99, R2 = 0.47W + 11.8, R3 = 0.52W + 10.8, and R4 = 0.41W + 11.5 respectively. The correlation coefficients among anteroposterior dimensions were 0.85, 0.64, 0.59, 0.70, 0.61, and 0.80 for R1/R2, R1/R3, R1/R4, R2/R3, R2/R4, and R3/R4 respectively (p < 0.01). Conclusions: There were significant correlations in the anteroposterior dimensions amongst the distal row screw lengths. The regression equations used in this study may be helpful to predict the length of distal row screw and prevent complications due to inappropriate screw choices. Level of Evidence: Level III (Therapeutic).

Functional and Radiographic Outcomes for Distal Radius Fractures Treated with Volar-Locked Plates and Percutaneous K-Wires: A Comparative Study

Purpose to evaluate and to compare radiological and functional outcomes of the volar locking plate fixation using pronator-sparing approach and K-wire fixation of distal radius fractures. Materials and Methods. We retrospectively analyzed 41 patients with distal radius fractures (27 female and 14 male) treated in the period from 2016 to 2020 using minimally invasive osteosynthesis via pronator-sparing approach. The mean age was 51 years (31-74 years). The control group consists of 37 patients (19 female and 18 male, mean age 61 years (29-76 years)), who underwent minimally invasive percutaneous K-wire fixation of distal radius fractures during the same period of time. Comparative analysis of radiographic and functional outcomes in both groups of minimally invasive osteosynthesis of distal radius fractures was carried out in the period from 1 to 6 months after the surgery. Results. Primary union of distal radius fractures was confirmed in X-rays in all patients within 6 weeks after the surgery. There were no complications in patients treated by pronator-sparing volar locking plate fixation, whereas in K-wire group we had 6 patients with complications: 4 cases (11%) superficial infection around K-wires and 2 cases (5,4%) intraoperative damage of sensitive branch of radial nerve. There were statistically significant differences in radiographic results (volar tilt, radial inclination, and radial height) between two groups: they all were better in patients treated by pronator-sparing volar locking plate fixation during the whole follow-up period (р0,01). Minimally invasive volar locking plate fixation via pronator-sparing approach also provided significantly better grip strength and range of wrist motion and forearm rotation in the early 6-month postoperative period, compared with percutaneous K-wire fixation (р0,001). Conclusion. Our study demonstrates that both techniques of minimally invasive osteosynthesis of distal radius fractures are effective and relatively safe methods of surgical treatment, but volar plating via pronator-sparing approach leads to a better reconstruction of the distal radius and better functional outcomes compared to percutaneous K-wiring.

Comparison of a ceiling-mounted 3D flat panel detector vs. conventional intraoperative 2D fluoroscopy in plate osteosynthesis of distal radius fractures with volar locking plate systems

ObjectivesTo compare intraoperative 3D fluoroscopy with a ceiling-mounted flat panel detector in plate osteosynthesis of distal radius fractures (AO/OTA 2R3C1.2) with volar locking plate systems to conventional 2D fluoroscopy for detection of insufficient fracture reduction, plate misplacement and protruding screws.MethodsUsing a common volar approach on 12 cadaver forearms, total intraarticular distal radius fractures were induced, manually reduced and internally fixated with a 2.4 distal radius locking compression plate. 2D (anterior-posterior and lateral) and 3D (rotational) fluoroscopic images were taken as well as computed tomographies. Fluoroscopic images, Cone Beam CT (CBCT), 360° rotating sequences (so called “Movies”) and CT scans were co-evaluated by a specialist orthopedic surgeon and a specialist radiologist regarding quality of fracture reduction, position of plate, position of the three distal locking screws and position of the three diaphyseal screws. In reference to gold standard CT, sensitivity and specifity were analyzed.Results“Movie” showed highest sensitivity for detection of insufficient fracture reduction (88%). Sensitivity for detection of incorrect position of plate was 100% for CBCT and 90% for “Movie.” For intraarticular position of screws, 2D fluoroscopy and CBCT showed highest sensitivity and specifity (100 and 91%, respectively). Regarding detection of only marginal intraarticular position of screws, sensitivity and specifity of 2D fluoroscopy reached 100% (CBCT: 100 and 83%). “Movie” showed highest sensitivity for detection of overlapping position of screws (100%). When it comes to specifity, CBCT achieved 100%. Regarding detection of only marginal overlapping position of screws, 2D fluoroscopy and “Movie” showed highest sensitivity (100%). CBCT achieved highest specifity (100%).ConclusionAs for assessment of quality of fracture reduction and detection of incorrect position of plate as well as overlapping position of the three diaphyseal screws CBCT and “Movie” are comparable to CT – especially when combined. Particularly sensitivity is high compared to standard 2D fluoroscopy.

Three-dimensional evaluations of preoperative planning reproducibility for the osteosynthesis of distal radius fractures

BackgroundThree-dimensional preoperative planning was applied for the osteosynthesis of distal radius fractures. The objective of this study was to evaluate the reproducibility of three-dimensional preoperative planning for the osteosynthesis of distal radius fractures with three-dimensional reference points.MethodsSixty-three wrists of 63 distal radius fracture patients who underwent osteosynthesis with three-dimensional preoperative planning were evaluated. After taking preoperative CT scans of the injured wrists, 3D images of the distal radius were created. Fracture reduction, implants choices, and placements simulation were performed based on the 3D images. One month after the surgery, postoperative CT images were taken. The reproducibility was evaluated with preoperative plan and postoperative 3D images. The images were compared with the three-dimensional coordinates of radial styloid process, volar and dorsal edges of sigmoid notch, and the barycentric coordinates of the three reference points. The reproducibility of the preoperative plan was evaluated by the distance of the coordinates between the plan and postoperative images for the reference points. The reproducibility of radial inclination and volar tilt on three-dimensional images were evaluated by intra-class correlation coefficient (ICC).ResultsThe distances between the preoperative plan and the postoperative reduction for each reference point were (1) 2.1±1.3 mm, (2) 1.9±1.2 mm, and (3) 1.9±1.2 mm, respectively. The distance between the preoperative plan and postoperative reduction for the barycentric coordinate was 1.3±0.8 mm. ICCs were 0.54 and 0.54 for the volar tilt and radial inclination, respectively (P<0.01).ConclusionsThree-dimensional preoperative planning for the osteosynthesis of distal radius fracture was reproducible with an error of about 2 mm for each reference point and the correlations of reduction shapes were moderate. The analysis method and reference points may be helpful to understand the accuracy of reductions for the three-dimensional preoperative planning in the osteosynthesis of distal radius fractures.Trial registrationRegistered as NCT02909647 at ClinicalTrials.gov

Distal radius fracture volar locking plate osteosynthesis using wide-awake local anaesthesia.

Surgical fixation of distal radius fractures under local anaesthesia with the patient wide awake allows an intraoperative testing of the fixation stability under active mobilization. We evaluated the feasibility and clinical results of this technique in 45 patients prospectively in two matched comparable groups: wide-awake local anaesthesia no tourniquet and loco-regional anaesthesia. We found that the pain scores during the anaesthetic administration and the surgical procedure were similar in two groups. Ranges of wrist motion and QuickDASH scores were improved significantly in the wide-awake local anaesthesia no tourniquet group at 6weeks and 3months and similar at 6months compared with those receiving loco-regional anaesthesia. Patients in wide-awake local anaesthesia no tourniquet returned to work significantly earlier than the loco-regional anaesthesia group. We conclude that osteosynthesis of distal radius fractures can be safely performed under wide-awake local anaesthesia no tourniquet, leading to no increase in pain level and similar functional outcomes compared with those under loco-regional anaesthesia.Level of evidence: III.

Incidence of Complications following Volar Locking Plate Fixation of Distal Radius Fractures: An Analysis of 647 Cases.

This study assessed the risk and factors of complications after volar locking plate fixation of distal radius fractures. A single-institution retrospective review of patients undergoing volar locking plate fixation of distal radius fractures between May of 2000 and May of 2015 was undertaken. Demographic data, major complications, minor complications, and radiographic parameters were evaluated. Six hundred forty-seven distal radius fractures managed with volar plate fixation in 636 patients were reviewed. Mean follow-up was 9.1 months. Mean age was 56.5 years. Mean body mass index was 28.0, and 14.6 percent of patients had a body mass index greater than 35. Fractures were classified as Arbeitsgemeinschaft für Osteosynthesefragen class 23-C (67.2 percent), 23-A (26.6 percent), and 23-B (6.2 percent). The incidence of major and minor complications was 13.8 percent and 17.5 percent, respectively. The most common complication was transient paresthesia (9.7 percent). The incidence of tendon rupture or irritation was 0.5 percent or 2.5 percent, respectively. Hardware removal for painful/symptomatic hardware occurred in 6.2 percent at an average of 427.8 days after surgery. Major complications and minor complications were increased 2.2- and 1.9-fold, respectively, in patients with a body mass index greater than 35. Major complications were also increased 3.19 times in patients with residual intraarticular step-off. Hardware removal was 3.3 times more likely in patients with Soong grade 2 plate prominence and 2.9 times more likely in patients with a history of diabetes mellitus. Volar plate osteosynthesis of distal radius fractures is associated with an overall low complication rate. Patient factors, including diabetes mellitus and obesity, and intraoperative factors, including intraarticular fracture alignment and plate prominence, were associated with a higher rate of complications or revision surgery. Risk, III.

Utility of an image fusion system for 3D preoperative planning and fluoroscopy in the osteosynthesis of distal radius fractures

BackgroundRecently, computerized virtual surgery planning has been increasingly applied in various orthopedic procedures. In this study, we developed an image fusion system for 3D preoperative planning and fluoroscopy for the osteosynthesis. To assess the utility of image fusion system, we evaluated the reproducibility of preoperative planning in the osteosynthesis of distal radius fractures with using the image fusion system, and compared with the reproducibility of the patients without using the image fusion system.MethodsForty-two wrists of 42 distal radius fracture patients who underwent osteosynthesis using volar locking plates were evaluated. The patients were divided into two groups. Image fusion group utilized three-dimensional (3D) preoperative planning and image fusion system. Control group utilized only 3D preoperative planning. In both groups, 3D preoperative planning was performed in order to determine reduction, placement, and choice of implants. In the image fusion group, the outline of planned image was displayed on a monitor overlapping with fluoroscopy images during surgery. Reductions were evaluated by volar tilt and radial inclination of 3D images. Plate positions were evaluated with distance to joint surface, plate center axis position, and inclination relative to the radius axis. Screw choices were recorded for the plan and actual choices for each screw hole. Differences in the parameters between pre- and postoperative images were evaluated. Differences in reduction shape, plate positions, and screw choices were compared between groups.ResultsThe differences in the distance from plate to joint surface were significantly smaller in the image fusion group compared to the control group (P < 0.01). The differences in the distal screw choices were significantly smaller in the image fusion group compared to the control group (P < 0.01).ConclusionsThe image fusion system was useful to reproduce the planned plate position and distal screw choices in the osteosynthesis of distal radius fractures.Trial registrationClinicalTrials.gov, NCT03764501

A Comparison of Radiographic Outcomes between 3D Preoperative Planning and Conventional Planning in the Osteosynthesis of Distal Radius Fractures.

Background: To assess the usefulness of three-dimensional (3D) digital pre-operative planning, we compared the radiographic parameters of the distal radius from 3D planning and conventional planning after osteosynthesis of distal radius fractures. We hypothesized that the use of 3D digital planning may improve radiographic outcomes for reduction and decrease the risk of correction loss. Methods: Sixty wrists of 60 distal radius fracture patients were randomly divided into two groups according to the order of hospital visits. Thirty wrists were treated with 3D preoperative planning as the plan group. Another thirty wrists were treated with conventional preoperative planning as the control group. Both groups were treated with volar locking plates. In the plan group, 3D digital preoperative planning and a surgical simulation were performed in order to determine the reduction and placement of the implants in addition to the plate/screw size prior to surgery. In the control group, conventional preoperative planning was performed. Ulnar variance, volar tilt, and radial inclination were measured at one week, three and six months after surgery. Difference of the measurement of radiographic parameters between operated and healthy side wrists were compared between plan and control groups at one week after surgery. Loss of corrections for radiographic parameters were compared between plan and control groups. Results: The differences between the operated and healthy side wrists were significantly smaller in the plan group compared to the control group for the volar tilt and radial inclination (p < 0.05).The loss of corrections for ulnar variance and volar tilt were significantly smaller in the plan group compared to the control group at six months after surgery (p < 0.05). Conclusions: 3D preoperative planning offers better reduction accuracy and reduces correction loss in the osteosynthesis of distal radius fractures.

Screw Length Optimization of a Volar Locking Plate Using Three Dimensional Preoperative Planning in Distal Radius Fractures.

A three-dimensional (3D) digital pre-operative planning system for the osteosynthesis of distal radius fracture was developed. The objective of this study was to evaluate screw choices for three-dimensional (3D) digital pre-operative planning of osteosynthesis of distal radius fractures and to compare with the screw choices for the conventional method. Distal radius fracture patients who underwent osteosynthesis using volar locking plates were evaluated. Thirty wrists in the plan group utilized 3D preoperative planning, and nineteen wrists in the control group utilized conventional preoperative assessment. In the plan group, the 3D preoperative planning was performed prior to surgery. The reduction was simulated with 3D image, and the implant choice/placement also simulated on the 3D image. In the control group, standard preoperative planning was performed using posterior-anterior and lateral view radiographs, and CT scan. After the planning, osteosynthesis was performed. During the surgery, the operator performed the reduction and the placement of the plate while comparing images between the pre-operative plan and fluoroscopy. The distal screw lengths and the anteroposterior diameter of the radius along the axis of the distal screws were measured. The ratios of the screw length and radius diameter were evaluated. The screw/radius ratios within the range of 0.75-1.00 were considered appropriate. The screw choices less than 0.75, or greater than 1.00 were considered inappropriate. The rate of appropriate screw choices were compared between plan and control groups. The results of appropriate screw choices were 86.1% and 74.8% in the plan group and the control group, respectively. The inappropriate screw choices were 14.0% and 25.2% in the plan group and the control group, respectively. The three-dimensional planning significantly increased appropriate screw choices compared to the conventional planning (p < 0.05). Three-dimensional digital preoperative planning is useful for the optimization of screw lengths in osteosynthesis of distal radius fractures.