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Distal radius fracture is an early sign of general osteoporosis: bone mass measurements in a population-based study.

To evaluate the bone mass by bone density measurements in patients with distal radius fracture, a prospective open case-control study was carried out in the county of Uppsala, Sweden, with population-based cases and controls. There were 111 patients with a distal radius fracture who were otherwise healthy and aged 53-76 years, together with 60 healthy controls of similar age, sex and menopausal status. The main outcome measures were bone mineral density (BMD) in the lumbar spine and hip measured with dual-energy X-ray absorptiometry, and in the (non-fractured) distal forearm determined by single-photon absorptiometry. It was found that at all measuring sites BMD was significantly lower in cases than in controls. The difference in the distal forearm was around 20% (p < 0.001) and in the spine and hip 5%-8% (p < 0.05-0.001). In the healthy subjects there were positive correlations (r = 0.39-0.65; p < 0.002) between the forearm BMD and that of both the spine and hip, whereas in the patients with distal radius fracture there was only a weak correlation between the forearm and spine BMD (r = 0.28; p < 0.05) and no association between the BMD of the forearm and hip (r < 0.01). It is concluded that patients with distal radius fracture who are otherwise healthy have a preferential bone loss at the distal forearm but also a generally low bone mass. Patients with fracture of the distal radius fracture should be considered for prophylactic measures against osteoporosis.

Age Factors↗

CT virtual reality in the preoperative workup of malunited distal radius fractures: preliminary results.

Our objective was to evaluate the usefulness of CT virtual preoperative planning in the surgical repositioning of malunited distal radius fracture. Eleven patients with malunited distal radius fracture underwent multislice CT of both wrists. A preoperative workup was performed in a virtual reality environment created from the CT data sets. Virtual planning comprised three main procedures, carrying out the virtual osteotomy of the radius, prediction of the final position of the distal radius after osteotomy and computer-assisted manufacturing of a repositioning device, which was later placed at the surgical osteotomy site to reposition objectively the distal radius fragment before fixation with the osteosynthesis. All patients tolerated the surgical procedure well. During surgery, the orthopedic surgeons were not required in any of the cases to alter the position of the distal radius that was determined by the repositioning device. At postoperative follow-up, the anatomic relationship of the distal radius was restored (radial inclination, 21.4 degrees ; volar tilt, 10.3 degrees ; ulnar variance, 0.5 mm). Clinically, a significant improvement of pronation (P=0.012), supination (P=0.01), flexion (P=0.001) and extension (P=0.006) was achieved. Pain decreased from 54 to 7 points. CT virtual reality is a valuable adjunct for the preoperative workup and surgical reposition of malunited distal radius fractures.

Adult↗

[Radio-radial external fixation for correction of malunited distal radius fracture].

For correction of malunited distal radius fractures, the use of the external fixator in radio-radial application was assessed. The device has been used for one-stage correction with corticocancellous bone blocks as well as with hemicallotasis for correction of dorsal angulation. The technical application is described and the use of the external fixator defined. Fourteen patients were treated with radio-radial application, seven of those were corrected with callus distraction. The mechanical possibilities of the fixator allowed complete correction of the malunion.

Adolescent↗

Arthroscopic reduction versus fluoroscopic reduction in the management of intra-articular distal radius fractures.

PURPOSE: Although arthroscopy offers an unparalleled view of intra-articular pathology, its use in the treatment of intra-articular distal radius fractures remains controversial. This study was designed to compare functional and radiologic outcomes of arthroscopically assisted (AA) versus fluoroscopically assisted (FA) reduction and external fixation of distal radius fractures. TYPE OF STUDY: Retrospective, case-matched comparison of 2 different procedures. METHODS: Between January 1995 and December 1999, 15 patients with comminuted intra-articular distal radius fractures underwent AA external fixation and percutaneous pinning. Fifteen patients underwent external fixation and FA reduction and pinning. Patients in both groups were matched for fracture pattern and age. RESULTS: Follow-up evaluation consisted of an evaluation of grip strength and range of motion as well as radiographic evaluation of palmar tilt, radial shortening, stepoff, and degenerative changes. Health-related quality of life outcomes were assessed using the Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire. Patients who underwent AA surgery had significantly improved supination compared with those who underwent FA surgery (88 degrees v 73 degrees; P =.02). AA reduction also resulted in improved wrist extension (mean, 77 degrees v 69 degrees; P =.01) and wrist flexion (mean, 78 degrees v 59 degrees; P =.02). Radial shortening, Knirk and Jupiter congruity grades, and DASH scores were similar for both groups. CONCLUSIONS: AA reduction and fixation of intra-articular distal radius fractures permits a more thorough inspection of the ulnar-sided components of the injury. At follow-up evaluation, patients who underwent AA procedures had a greater degree of supination, flexion, and extension than patients undergoing FA surgery. LEVEL OF EVIDENCE: Level II prospective cohort study.

Adult↗

[Distal radius fractures and concomitant lesions. Experimental studies concerning the pathomechanism].

Since Colles (1814) first described a distal radius fracture and the publication by Dupuytren (1834), the frequency of and problems surrounding these fractures were increasingly recognised. Not only the treatment but also the formation and type of fracture were repeatedly analysed. The various theories concerning the pathomechanism led to names such as: "tear fracture", "bend fracture", "thrust fracture", "compression fracture", "snap fracture" and others. In our experimental studies we attempted to simulate the pathomechanism of distal radius fractures and present them pictorially. With the help of a materials testing machine, 63 prepared cadaver arms were hyperextended in the wrist joint until a radius fracture occurred. The concomitant lesions were registered radiologically and by dissection. Moreover, additional cadaver arms were deep-frozen and examined by means of computer tomography and cryosection according to Kathrein. Through experimental hyperextension it was possible to generate dorsal, central, and palmar types of fractures. We produced 42 dorsal, 14 central and 7 palmar fractures. Fundamentally, it seems that the fracture depends on the extent in which the carpal bones of the proximal row are pressed against the dorsal, central or palmar part of the articular surface of the distal radius. The subsequent dissection showed in 40 cases (63 %) mostly multiple concomitant lesions and in 23 cases (37 %) none of these. The reason for concomitant lesions may be the proportion of bone stability to the strength of ligaments. Most frequently (27 cases, i.e. 43 %), we found a destabilisation of the articular disk with or without a bony avulsion fragment (fracture of the ulnar styloid). We also commonly found ruptures of the interosseous ligaments between scaphoid and lunate (20 cases, i.e. 32 %) and lunate and triquetrum (11 cases, i.e. 18 %). It is difficult to apply knowledge gained from experimental studies on preserved cadaver arms clinically. There are of course no physiological reflexes and the slow fracture process must be taken into consideration. This holds true not only for concomitant lesions but also for the type of fracture. On the other hand, in these experimental studies it was possible to generate many realistic types of fractures with their concomitant lesions.

Biomechanical Phenomena↗

Use of an external fixation combined with the buttress-maintain pinning method in treating comminuted distal radius fractures in osteoporotic patients.

BACKGROUND: It is difficult to keep the alignment of a distal radius fracture in patients with osteoporosis and prevent malunion. Therefore, we hoped to design better method to maintain alignment. METHODS: Thirty-two patients over 65 years old with a displaced unstable distal radius fracture were treated by the external fixator combined with buttress-maintain pinning method and were compared with a group of 66 patients less than 60 years old treated by the same method. RESULT: The radiologic results demonstrated that postoperative and final radial length and volar tilt were not statistically different between both groups. The functional result (excellent and good) in the elderly group was 87.5% and 89% to that of the control group. There was only one complication of pin tract infection in the elderly group. CONCLUSIONS: External fixation for unstable distal radius fracture combined with buttress-maintain pinning method can be used in the osteoporotic bone of older adults with results similar to those for young adults at 18 months follow-up.

Adult↗

Arthroscopic reduction and internal fixation of distal radius fractures.

Despite recent advances in the treatment of complex distal radius fractures, problems of stiffness, carpal instability, and posttraumatic arthritis remain in a significant number of cases. Associated soft-tissue and ligamentous injuries are being recognized with increasing frequency. Arthroscopic reduction and internal fixation not only allow for anatomic reduction of the distal radius fracture with minimal surgical trauma, but provides a valid diagnostic and treatment alternative for the often missed associated injuries.

Adult↗

Open reduction and internal fixation of unstable distal radius fractures: results using the trimed fixation system.

OBJECTIVE: The purpose of this study was to evaluate the early results of patients with displaced and unstable distal radius fractures treated with fragment-specific fixation. DESIGN Prospective and consecutive. SETTING: Private orthopaedic practice. PATIENTS/PARTICIPANTS: Twenty-five patients with 27 fractures with an average follow-up of 29 months (range 24-36 months) treated with fragment-specific fixation for unstable radius fractures. MAIN OUTCOME MEASUREMENTS: Clinical and radiographic examination. Disabilities of the arm, hand, and shoulder and patient-rated wrist evaluation outcome measures. RESULTS Patients had an average 61 degrees of dorsiflexion and 54 degrees of palmarflexion at the wrist. Twenty-five fractures healed in acceptable alignment, with one loss of reduction and one patient death. Mean +/- standard deviation DASH score was 17 +/- 18, and PRWE score was 19 +/- 22. CONCLUSION: Unstable distal radius fractures can be reliably and anatomically reduced and stabilized using fragment-specific fixation. Fixation of markedly comminuted fractures is secure enough to allow immediate motion and does not require casting or external fixation. Preliminary clinical and radiographic results are excellent, and patient satisfaction is high. Anatomic reduction with early motion can be achieved in a routine fashion on unstable distal radius fractures using the described technique.

Adult↗

Dynamic splinting of forearm rotational contracture after distal radius fracture.

The results of dynamic forearm rotational splinting for the treatment of forearm rotational contractures in patients with acceptably aligned, healed distal radius fractures are documented. Fifteen patients with distal radius fractures that healed with < or =+5 mm ulnar variance and < or =20 degrees dorsal tilt had dynamic forearm rotational splinting for contractures that had failed conventional hand therapy. Average pronosupination arc before splinting was 83 degrees. Dynamic forearm rotational splinting increased forearm rotation by 52% to an average of 126 degrees. Only one patient with development of ectopic bone in the interosseous space during splinting failed to obtain at least 30 degrees pronation and supination after splinting. Dynamic forearm rotational splinting effectively treats rotational contractures in patients who have healed distal radius fractures that are in acceptable alignment.

Adult↗

Missed opportunities in patients with osteoporosis and distal radius fractures.

Low-energy wrist (distal radius) fractures are hallmarks of osteoporosis. Prompt diagnosis and treatment of osteoporosis reduce refracture rates. We retrospectively determined the type and frequency of osteoporosis-related interventions rendered to patients 50 years and older in the year after a wrist fragility fracture. In addition, we compared the rates of intervention between men and women. Data were collected from the computerized medical record of one military healthcare system. We identified 111 patients who sustained wrist fragility fractures between July and December 2002. Endocrinology referrals, dual-energy xray absorptiometry scans, and osteoporosis medication prescriptions in the year after their fracture were recorded. Overall, 28 patients (25%) were referred to endocrinology, 22 patients (20%) had a dual-energy xray absorptiometry scan, 33 patients (30%) were prescribed an approved medication for treatment of osteoporosis, and 52 patients (47%) were prescribed one of these medications and/or vitamin D and calcium. Sixty percent of patients received at least one intervention. All diagnostic and medical interventions were more likely ordered for women than men. Orthopaedic surgeons continue to miss opportunities to initiate diagnostic and therapeutic interventions for patients, especially men, presenting with fragility fractures.

Absorptiometry, Photon↗

Intra-articular distal radius fractures: the role of arthroscopy?

Arthroscopic assisted fixation of distal radius fractures offers several advantages. It allows for the evaluation of the articular reduction under a bright light and magnification. Particularly, rotation of the fracture fragments, which is difficult to judge under fluoroscopy, may be detected arthroscopically and corrected. Washing out fracture hematoma and debris potentially allows for improved range of motion, as shown by the studies of Doi and Stewart. Wrist arthroscopy also allows for detection and management of associated soft tissue injuries, which has been shown to occur with distal radius fractures. Some of the more severe interosseous ligament injuries can be diagnosed on plain or traction radiographs. Arthroscopy performed at the same time as fracture reduction, however, substantially increases the recognition of these injuries. In addition, it is wellknown that the management of acute interosseous ligament tears has a better prognosis when compared with chronic lesions.

Arthroscopy↗

Radiologic and patient-reported functional outcomes in an elderly cohort with conservatively treated distal radius fractures.

PURPOSE: There have been few prospective studies of elderly patients with conservatively treated distal radius fractures and little is known about the relationship between acceptable radiographic reduction and functional outcomes in this population. We hypothesized that acceptable fracture reduction (according to standard radiographic dorsal/volar tilt criteria) would be associated with better functional outcomes and greater satisfaction. METHODS: Seventy-four patients who were at least 50 years of age with conservatively managed distal radius fractures were recruited from 2 large urban emergency departments from January 2001 to December 2001. Patients with wrist fractures treated in the emergency department and discharged home were included; patients admitted to the hospital or who required surgical reduction were excluded. Standard lateral radiographs were taken after the final cast was removed. These were reviewed independently by a reference-standard musculoskeletal radiologist and the degree of dorsal/volar tilt was recorded. This value was dichotomized according to standard published dorsal/volar tilt criteria as acceptable (dorsal tilt <10 degrees or volar tilt <20 degrees ) or unacceptable (dorsal tilt >10 degrees or volar tilt >20 degrees ). The Medical Outcomes Study Short-Form 12 (SF-12); the Disabilities of the Arm, Shoulder, and Hand questionnaire; and a patient satisfaction survey were used to assess patient-reported outcomes 6 months after the injury. RESULTS: The average dorsal/volar tilt measured by the reference standard radiologist was 3.4 degrees (SD=13.6) dorsal; overall 47 patients (64%) were considered to have an acceptable radiographic reduction. Acceptable radiographic reduction was not associated with better generic physical or mental health status, lesser degrees of upper-extremity disability, or greater satisfaction with outcomes than was unacceptable reduction. Overall 44 of 74 patients (59%) reported being satisfied or very satisfied with their functional status at 6 months. CONCLUSIONS: Contrary to our hypotheses we found that acceptable radiographic reduction (according to dorsal/volar tilt criteria) was not associated with better self-reported functional outcomes or increased satisfaction at 6 months in elderly patients with conservatively treated distal radius fractures.

Aged↗

Volar fixation of dorsally displaced distal radius fractures using the 2.4-mm locking compression plates.

PURPOSE: To determine whether volar fixed-angle plate fixation with a new plate system could be used to treat dorsally unstable distal radius fractures. We hypothesized that volar fixed-angle plate fixation with or without radial styloid fixed-angle plate fixation would provide sufficient rigidity to allow early active range of motion without compromising fracture reduction. The initiation of early active motion may improve functional outcomes. METHODS: A retrospective review was conducted of one institution's initial experience using a new volar fixed-angle plate system to treat dorsally displaced intra-articular and extra-articular distal radius fractures. Thirty-two fractures in 32 patients with dorsally displaced distal radius fractures were treated with a volar fixed-angle plate with or without a radial styloid fixed-angle plate. Fractures were classified using the AO classification. Radiographic parameters on preoperative, postoperative, and final follow-up radiographs were compared. The time to initiation of active range of motion was determined. Final follow-up ranges of motion and complications were reported. Finally, comparisons were made between the 23 fractures treated with a volar plate alone and the 9 fractures treated with a volar plate and a radial styloid plate. RESULTS: The average follow-up period was 13 months. Two thirds of the fractures were intra-articular. Average loss of reduction from initial postoperative to final follow-up radiographs was 0 degrees of volar tilt, 1 degrees of radial inclination, and 0 mm of radial length. Active wrist and forearm ranges of motion were initiated at an average of 11 days after surgery. The final follow-up flexion-extension and pronation-supination arcs averaged 112 degrees and 151 degrees , respectively. The 9 fractures treated with the combination of a fixed-angle volar plate with a fixed-angle radial styloid plate had greater initial displacement than did the 23 fractures treated with a volar plate alone. Otherwise, differences between the 2 groups were not significant. Only 1 radial styloid plate became symptomatic. CONCLUSIONS: Volar plate fixation using a new fixed-angle plate system successfully can stabilize dorsally unstable distal radius fractures. Early active range of motion was facilitated without compromising fracture reduction.

Bone Plates↗

Assessment of instability factors in adult distal radius fractures.

BACKGROUND: The purpose of this study was to evaluate the radiographic outcome of unstable distal radius fractures treated by closed reduction and sugar tong splinting and to quantitatively evaluate Lafontaines' criteria of instability. METHODS: Fifty patients with 3 or more instability factors as described by Lafontaine were treated by finger trap traction, closed reduction, and sugar-tong splinting. They were evaluated radiographically for initial angulation, radial inclination, radial length, and palmar tilt at the time of injury, after reduction, and 1 week, 2 weeks, and 4 weeks after reduction. The fracture either maintained an adequate reduction or failed to maintain an adequate reduction and showed secondary displacement based on specific criteria. RESULTS: At 4 weeks after reduction 46% of these unstable distal radius fractures maintained an adequate reduction. Of the 54% of fractures that failed to maintain an adequate reduction, age was the only statistically significant predictor of secondary displacement. After obtaining an acceptable initial closed reduction, patients 58 years of age were found to be at 50% risk for secondary displacement. The risk for displacement with an unacceptable radiographic result was found to increase with increasing age and decrease with decreasing age. CONCLUSION: In the closed management of these potentially unstable distal radius fractures, age was the only statistically significant risk factor in predicting secondary displacement and instability. These data help guide treatment by closed reduction and immobilization with serial x-rays or by surgical stabilization.

Adolescent↗

Intra-articular distal radius fractures: arthroscopic assessment of radiographically assisted reduction.

The optimal means of assessing articular displacement during closed reduction of distal radius fractures is unknown. The purpose of this study was to evaluate the in vivo accuracy of fluoroscopy (C-arm) and plain radiographs (XR) in measuring articular step-off and gap and to determine if postreduction arthroscopy can identify malreduced intra-articular fractures that would benefit from reduction. Fifteen intra-articular distal radius fractures underwent closed manipulation and percutaneous pinning. Reduction was assessed sequentially by C-arm, XR, and wrist arthroscopy. The width of gapping between articular surface fragments was underestimated to a statistically significant degree by both C-arm and XR. The magnitude of articular step-off measured with arthroscopy was not statistically different than that measured radiographically. In 5 (33%) cases, the optimal reduction obtained using C-arm and XR was found to have an articular displacement of >1mm by adjunctive arthroscopy. Complete reduction and pinning was performed with satisfactory results. These results suggest that adjunctive arthroscopy may detect residual gapping of the articular surface that is not seen by C-arm or XR. Residual displacement noted by adjunctive arthroscopy may prompt another reduction effort and result in an improved articular alignment of intra-articular distal radius fractures.

Adult↗

Radiocarpal articular pressures during the reduction of distal radius fractures.

OBJECTIVES: To measure in vivo radiocarpal articular pressures during closed reduction and external fixation of distal radius fractures. DESIGN: Intraoperative measurements using a sterile pressure sensitive sensor specially constructed for this application. SETTING AND PATIENTS: Ten patients with a closed distal radius fracture stabilized by radiometacarpal external fixation. Radiocarpal pressures measured during transarticular distraction, wrist palmar flexion, wrist ulnar inclination, and fracture reduction. MAIN OUTCOME MEASUREMENTS AND RESULTS: Transarticular distraction resulted in a substantial decrease of the articular pressure, averaging -158.1 mmHg. Palmar flexion resulted in a mean pressure increase of 91.8 mmHg. The reduction of the fracture using a combination of distraction, palmar flexion and ulnar deviation resulted in either an increase or decrease of articular pressure, but always with a tendency toward progressive normalization of the pressure, with a mean slope of 3.2 mmHg/min. CONCLUSIONS AND CLINICAL RELEVANCE: The phenomena leading to the reduction of distal radius fractures could be related in part to a decrease of the intraarticular pressure, which may be responsible for a suction effect on the intraarticular bone fragments.

Adolescent↗

Distal radius fractures: a comparison of tension band wiring versus ulnar outrigger external fixation for the management of distal radioulnar instability.

PURPOSE: To retrospectively compare the results of immobilization of the forearm in supination with the results of tension band fixation of the ulnar styloid in 35 patients with distal radius fractures, fracture of the base of the ulnar styloid, and distal radioulnar joint instability treated with external fixation. METHODS: Thirty-five patients with fractures of the distal radius, fracture of the base of the ulnar styloid, and unstable distal radioulnar joint had external fixation with adjunctive percutaneous pins and allograft bone to reduce and stabilize the distal radius fracture anatomically. Only those patients with an associated ulnar styloid base fracture displaced over 2 mm with gross distal radioulnar joint instability relative to the contralateral wrist were included in this study. Group 1 consisted of patients in whom the ulnar styloid base fracture was treated with conventional tension band wiring techniques. Group 2 patients were treated with a supplemental outrigger from the external fixator to the ulna and locked in 60 degrees of forearm supination. Groups 1 and 2 had an average follow-up period of 40 and 36 months, respectively. RESULTS: Group 2 had significantly better supination than group 1. In terms of functional outcome it was found that there was no significant difference for the Disabilities of the Arm, Shoulder, and Hand and the Gartland and Werley scores between the 2 treatment groups. There was a lower rate of complications and fewer secondary procedures were required in group 2. The incidence of distal ulna resection was 4 of the 35 patients (2 patients in each group). CONCLUSIONS: Our results indicate that patients in whom the ulnar styloid can be reduced and maintained in supination can be treated effectively with fixed supination outrigger external fixation. This method resulted in a statistically significant improvement in supination and a lower rate of distal radioulnar joint complications, and it required fewer secondary procedures.

Adult↗

Elevated plasma beta-endorphin/beta-lipotropin concentration following a radius fracture.

Plasma beta-endorphin/beta-lipotropin concentration was assessed soon after a fracture. Blood samples from 14 patients with radius fractures were obtained from both arms soon after admission to the hospital (mean 245 min) after the accident. Follow-up samples were taken after healing of the fractures. Higher plasma beta-endorphin/beta-lipotropin concentrations were found in blood samples taken soon after a fracture in both arms compared with the concentrations after healing of the fracture. At admission, mean beta-endorphin/beta-lipotropin concentrations in the fractured and the contralateral arms were 12.7 pmol/L and 13.2 pmol/L, and after recovery 11.1 pmol/L and 11.5 pmol/L (p = 0.012 and p = 0.041), respectively. The pain decreased according to the visual analogue scale (VAS) (0-10) from 4.64 at admission to 0.58 after healing (p < 0.001). In conclusion, this study showed that beta-endorphin/beta-lipotropin concentrations are increased in both arms following a radius fracture compared to the level after the fracture has healed.

Adult↗