桡骨远端骨折类型和腕不稳定关系

目的 研究桡骨远端骨折类型对腕不稳定发生的作用。方法 在160例正常腕关节测量并确定腕不稳定标准基础上,比较236例桡骨远端骨折中桡骨远端关节面不平整(52例)、桡骨明显缩短(50例)、桡骨远端关节面背倾(43例)和伴尺骨茎突骨折(65例)与无以上因素的一般骨折(63例)不稳定发生率及类型,分析以上骨折相关因素的严重程度和不稳定发生的关系。结果 伴有尺骨茎突骨折例腕不稳定发生率为47.7％,腕关节背倾例中发生率为30.2％,桡骨明显缩短例中发生率为22％,关节面不平整例中发生率为17.3％,一般骨折例中发生率为7.8％。腕不稳定例的桡骨缩短、关节面背倾和尺骨茎突骨折移位程度与无不稳定的比较有显著差异。结论 桡骨远端骨折的关节面不完整、桡骨明显缩短、关节面背倾和伴尺骨茎突骨折对腕不稳定例发生及程度有显著影响。     

Staged reconstruction for malunited fractures of the distal radius

This prospective study assessed the outcomes of 26 symptomatic malunited distal radial fractures which were treated with an opening wedge corrective osteotomy and bone grafting with rigid fixation. An ulnar shortening osteotomy was subsequently required as a second-stage operation in five cases to restore normal ulnar variance. A wrist arthroscopy was indicated as a third stage procedure with persistent ulnar sided wrist pain in order to address central tears of the triangular fibrocartilage. Satisfactory functional scores were achieved by 20 of the 26 patients after distal radial osteotomy alone and, 24 of the 26 after subsequent ulnar shortening osteotomies and arthroscopy when necessary. The one, two or three stage concept of reconstructing the malunited distal end radius could optimise the outcome rather than using a single-stage strategy.     

Simultaneous radial closing wedge and ulnar shortening osteotomies for distal radius malunion

PURPOSE: Closing wedge osteotomies are an attractive treatment option for distal radius malunion in patients with osteopenia; however, they require an ulnar head resection to accommodate closure of corrective osteotomy and to address the issue of ulnocarpal abutment. The literature contains little information on concomitant ulnar shortening osteotomy despite a physiologic solution. We report the functional and radiographic outcomes of 5 patients treated for symptomatic distal radius malunion with simultaneous radial closing wedge and ulnar shortening osteotomies. METHODS: All 5 patients were women aged 52 to 69 years (average, 61 years). Four patients had extra-articular radius fractures with dorsal angulation (20-22 degrees ) and shortening (3-7/mm); the other had the fracture with volar angulation (24 degrees ) and shortening (11 mm). Through a volar approach an appropriate amount of bone wedge was removed from the distal radius. A small volar T-plate was used to secure the osteotomized bone fragment. Six to 11 mm of ulnar shortening osteotomy was performed by using transverse osteotomy and compression plating technique with an AO compression device. RESULTS: In all 5 wrists healing of radial and ulnar osteotomies occurred less than 3 months after surgery. There were no postsurgical complications. Postsurgical radiographs showed that the volar tilt angle of the radius was reduced to normal range (range, 8-15 degrees ) in all wrists. The ulnar variance was 0 mm in 4 wrists and 2 mm in 1 wrist. There were significant improvements in pain, function, and range of motion at an average follow-up evaluation of 17 months. The average grip strength as a percentage of the opposite side improved from 30% before to 73% after surgery. CONCLUSIONS: This study showed that closing wedge osteotomy of the radius concomitant with ulnar shortening osteotomy is technically and functionally adequate. Our procedure is indicated for patients with osteopenia for whom opening wedge osteotomy of the radius is inadequate.     

Rettungsoperationen und deren Differenzialindikation am distalen Radioulnargelenk

The most common cause of an arthritically damaged distal radioulnar joint is a malunion of a distal radius fracture. Therapeutically, ulnar head resection, hemiresection-interposition-technique, Kapandji-Sauvé procedure and implantation of an ulnar head prosthesis have been described. None of these procedures is able to restore the complete function of the joint. Therefore, anatomical reconstruction of the joint in acute or secondary correction osteotomy for malunited fractures of the distal radius should be performed to avoid the development of the arthrosis. Numerous clinical studies have demonstrated a similar reduction of the clinical symptoms for all procedures. Therefore, classification of the different procedures has to consider the number of complications. Biomechanically, partial resection of the distal ulna will destabilize the distal radioulnar context and clinically may lead to painful radioulnar and/or dorsopalmar instability of the distal ulnar stump. Biomechanically and clinically, this complication, next to secondary extensor tendon ruptures, has to be expected far more often following complete resection of the ulnar head than in the alternative procedures. We do not see any remaining indication for complete resection of the ulnar head. Clinical results and the occurrence of painful instability of the distal ulnar stump have been reported almost identically for the hemiresection-interposition technique and the Kapandji Sauvé procedure. Therefore, both procedures appear to be equally suitable for the treatment of painful arthrosis of the distal radioulnar joint. In patients with a preexisting instability of the distal radioulnar joint, or a major deformity of the radius or the ulna, we prefer to perform the hemiresection-interposition-technique. In these conditions we consider the remaining contact of the triangular fibrocartilage complex with the distal end of the ulna a biomechanical advantage to reduce the risk of secondary instability. Biomechanically as well as clinically, replacement of the ulnar head using a prosthesis has been shown to either avoid or solve the problem of instability. We therefore consider ulnar head replacement the treatment of choice in secondary painful instability following resection procedures at the distal end of the ulna. Primary ulnar head replacement should be considered in special indications until long-term follow-up results are available.     

Anatomic and biomechanical analysis of the arthroscopic wafer procedure.

The ulnar impaction syndrome is a common clinical entity that is most often associated with positive ulnar variance and is characterized by triangular fibrocartilage complex (TFCC), lunate, and/or distal ulnar pathology. Traditional treatment for symptomatic ulnar impaction syndrome has been conservative; however, in cases refractory to nonoperative management, formal ulnar shortening has been successful in long-term clinical series. Recently, arthroscopic ulnar shortening, the "arthroscopic wafer procedure" (AWP) (debridement of the perforated TFCC margins and limited ulnar head resection using a motorized burr) has become an option to treat this clinical syndrome. In an attempt to evaluate the biomechanical efficacy of the AWP, an experimental study was undertaken using nine ulnar positive cadaver forearms. Each specimen was evaluated biomechanically using axial load cells and pressure-sensitive film to evaluate the effect of serial resection of the TFCC and distal ulna on axial load and ulnar carpal pressures. The results of this experimental study revealed a statistically significant unloading of the ulnar aspect of the wrist after excision of the centrum of the TFCC and resection of the radial two-thirds width of the ulnar head, to a depth of subchondral bone resection. Furthermore, additional bony resection tended to correlate favorably with the stage of TFCC pathology noted, i.e., the more advanced the stage, the more resection necessary to unload the ulnar aspect of the wrist. Based on this biomechanical study, a limited clinical series has been initiated with early favorable results. The AWP biomechanically unloads the ulnar carpal complex, and therefore has a theoretical potential of relieving the symptoms of the ulnar impaction syndrome.(ABSTRACT TRUNCATED AT 250 WORDS)     

The ulnar impaction syndrome

The ulnar impaction syndrome can be defined as the impaction of the ulnar head against the triangular fibrocartilage complex and ulnar carpus resulting in progressive degeneration of those structures. The differential diagnosis in patients who present with ulnar wrist pain and limitation of motion can also include ulnar impingement syndrome and arthrosis or incongruity of the distal radioulnar joint. Structural abnormalities involving the distal radioulnar joint, distal radius, and ulnar carpus must be carefully elucidated prior to developing a treatment plan. When such abnormalities are identified and appropriately addressed, surgical treatment can be expected to be effective in the majority of cases. It is important to remember that in the absence of obvious structural abnormalities, the ulnar impaction syndrome may result from daily activities that result in excessive intermittent loading of the ulnar carpus. In this group of patients, treatment is directed at decreasing ulnar load by shortening the distal ulna in any of several ways. If relative instability of the ulnar ligamentous complex is a factor, then ulnar shortening by recession is the treatment of choice. Malunion of the distal radius resulting in ulnar impaction syndrome is best treated by addressing the deformity; that is, corrective radial osteotomy. Patients who present with a combination of ulnar impaction syndrome along with distal radioulnar joint, abnormalities must have both of these abnormalities addressed at the time of surgery. The matched ulnar resection and the hemiresection interposition arthroplasty are both effective procedures; however, the Suave-Kapandji procedure also can be used to address relative ligamentous laxity at the ulnar aspect of the wrist. The Darrach procedure is presently not recommended as a first-line treatment in these cases; however, when used as a salvage procedure, satisfactory results can be obtained in properly selected patients. Careful preoperative evaluation and planning are therefore the key to successful treatment of the ulnar impaction syndrome.     

尺骨短缩术联合腕关节镜治疗桡骨远端骨折后畸形愈合的疗效分析

目的 探讨采用腕关节镜技术联合尺骨短缩术治疗桡骨远端骨折后畸形愈合的临床效果.方法 2013年9月至2015年9月我院收治桡骨远端骨折后畸形愈合病人67例,根据手术方法分为三组:联合治疗组,35例,采用腕关节镜技术联合尺骨短缩术治疗;尺骨短缩组,21例,采用单一的尺骨短缩术进行治疗;腕关节镜组,11例,采用单一的腕关节镜技术清理关节腔治疗.比较各组治疗后的数字评价量表(numerical rating scale,NRS)疼痛评分和上肢、肩、手功能障碍(disabilities of the arm,shoulder and hand,DASH)腕关节评分.结果 联合治疗组、尺骨短缩组治疗后的NRS疼痛评分分别为(1.32±0.52)分、(1.63±0.71)分,两组的腕关节DASH评分分别为(15.42±6.31)分、(18.03±7.64)分,均较术前明显改善,差异有统计学意义(P均<0.05);但腕关节镜组治疗后改善不明显.联合治疗组治疗后的NRS疼痛评分最低,腕关节镜组最高,三组间得分进行两两比较,差异均有统计学意义(均P<0.05).联合治疗组、尺骨短缩组治疗后的腕关节DASH评分差异并无统计学意义,但均优于腕关节镜组,差异均有统计学意义(均P<0.05).结论 尺骨短缩术联合腕关节镜技术对于桡骨远端骨折后畸形愈合造成的疼痛及功能障碍的改善具有积极的临床意义.     

The pathology of the long ulna: anatomy and treatment

A long ulna, as a result of congenital differential growth, such as Madelung's disease, or injury, commonly a consequence of a malunited distal radial fracture, may present clinically as pain, decreased motion, mainly of pronosupination, and weakness of grip. Secondary effects may include perforations and tears of the triangular fibrocartilage complex, cartilage wear of the proximal surface of lunate and triquetrum and tears of the lunotriquetral ligament. Positive ulnar variance may be evident on X-rays but a prominent ulnar head cannot always be excluded when there is neutral ulnar variance and further investigations, such as an arthroCTscan or arthroscopy, may be necessary. The two principle treatment options are (a) resection of the distal ulna (Darrach's and Sauvé-Kapandji's techniques are commonly used) and (b) techniques preserving the ulnar head, including different modalities of shortening osteotomy. The aim is to regain a congruent distal radioulnar joint, restore painless and normal pronosupination and prevent onset of osteoarthritis of this joint.     

Simultaneous radial closing wedge and ulnar shortening osteotomy for distal radius malunion

Closing wedge osteotomies are an attractive treatment option for distal radius malunion in patients with osteopenia. It does not require a separate-site bone graft, result-ing in decreased morbidity. However, this procedure has always been performed in combination with ulnar head resection to accommodate closure of corrective osteotomy and to address the issue of ulnocarpal abutment. Because ulnar shortening osteotomy is more physiological solution, it seemed advantageous to us to combine radial closing wedge osteotomy and ulnar shortening osteotomy. In this article, we present in detail our technique for treating patients with distal radius malunion. The patients are potentially osteopenic such as women aged over 45 years and are active at home, work, and/or recreation but are not involved in heavy physical work. Through volar approach an appropriate bone wedge is removed from the distal radius. A small volar T-plate is used to secure the osteotomized bone fragments. The aim of the radial osteotomy is to correct the dorsal angulation in the sagittal plane within a normal range of 1 degree to 2 degrees with reference to that of opposite wrist. Ulnar shortening osteotomy is performed by using transverse osteotomy and compression plating technique with an AO compression device. The ulnar variance is adjusted to neutral. Although the technique presented requires the surgeons to use careful plate and screw technique, early results have been encouraging, and patients with osteopenia can be treated successfully. Decreased grip strength which may be provoked by shorting of the forearm is acceptable.     

Ulnar bursa distention following volar subluxation of the distal radioulnar joint after distal radial fracture: a rare cause of carpal tunnel syndrome

This report describes an eighty-four-year-old woman with persistent carpal tunnel syndrome attributable to an ulnar bursa distention associated with the subluxation of the distal radioulnar joint after distal radial fracture. During surgery, when the forearm was placed in supination, the ulna head with a sharp osteophyte was found to be displaced into the carpal tunnel through a defect of the ruptured capsule of the wrist joint. This volar subluxation of the ulnar head had caused distention of the ulnar bursa, causing compression of the median nerve, which resulted in carpal tunnel syndrome. In addition to reduce displaced fractured segment to obtain anatomic articular surface, original radial length and tilt, the anatomic restoration of the distal radioulnar joint is essential to maintain better long-term function after fracture of the distal radius.     

Capsulotomy of the distal radio ulnar joint

In 18 patients, of whom the majority had sequelae after fractures to the distal radius, a capsulotomy of the distal radio ulnar joint was performed. Their main complaints were painful restricted forearm rotation combined with reduced grip strength. All patients were examined at least one year after surgery. 15 had improved forearm rotation and reduced pain while 14 had improved grip strength. It is concluded that capsulotomy of the distal radio ulnar joint might be effective treatment in cases of restricted painful forearm rotation after injuries to the distal radio ulnar joint.     

Analysis of dynamic distal radioulnar convergence after ulnar head resection and endoprosthesis implantation

The most common method to treat the arthralgic distal radioulnar joint is resection of the entire ulnar head (Darrach procedure). Pain and weak grip strength usually manifest complications related to instability of the distal forearm. In an attempt to mechanically stabilize the distal forearm after ulnar head resection, an endoprosthesis was developed to replace the ulnar head after Darrach resection. The goals of this study were to evaluate the dynamic effects of the Darrach procedure on radioulnar convergence and the mechanical efficacy of implantation of an ulnar head endoprosthesis after Darrach resection. Cadaver forearms were rotated actively and passively and relevant muscles were loaded simultaneously with a dynamic PC-controlled forearm simulator. Resultant total forearm torque and 3-dimensional kinematics of the ulna, radius, and third metacarpal were recorded simultaneously in 7 fresh-frozen cadaver upper extremities. Comparisons were made between the intact state, after Darrach resection, and after implantation of ulnar head endoprosthesis. The Darrach resection created substantial forearm instability with movement of the radius ulnarly (0.92-0.38 cm vs intact state) and anteroposterior translation in each loading condition. Implantation of the ulnar head endoprosthesis effectively restored distal radioulnar joint stability by simulating the geometry of the ulnar head, further stabilized by attaching the triangular fibrocartilage complex. These laboratory data provide validity to implanting an ulnar head endoprosthesis to stabilize the distal forearm after Darrach resection.     

Irreducible chronic palmar dislocation of the distal radioulnar joint--a case report.

We report a rare case of irreducible chronic palmar dislocation of the distal radioulnar joint (DRUJ). This case showed that the dislocated ulnar head was impacted to the palmar cortex of the radius probably due to the dynamic force of the pronator quadratus muscle. Re-attachment of the ulnar styloid and partial resection of the ulnar head were necessary to make the reduction of the DRUJ possible. The continuity of the radioulnar ligament to the ulnar head was restored and the stability of DRUJ was maintained after reduction.     

Die Behandlung der Arthrose des distalen Radioulnargelenks

The distal radioulnar joint (DRUJ) plays a key role in stable forearm rotation. The main stabilizer of the DRUJ is the triangular fibrocartilaginous complex (TFCC). If the integrity of the DRUJ is disturbed, commonly after distal radius fractures, osteoarthritis may develop. For the surgical treatment of osteoarthritis, different techniques are available and in most cases salvage procedures (Darrach, Bowers and Sauvé-Kapandji operations) are performed which generally promise reasonable results but include the potential risk of radioulnar instability which can lead to pain and weakness. Soft tissue stabilizing techniques have only limited success rates. In an attempt to mechanically stabilize the distal forearm following ulnar head resection various endoprostheses have been developed to replace the ulnar head. The prostheses can be used for the secondary treatment of failed ulnar head resection but can also achieve good results in the primary treatment of osteoarthritis of the DRUJ.     

Maladie de Madelung — Pourquoi avoir choisi une ostéotomie selon Sauvé-Kapandji?

For bilateral Madelung’s deformity in a 14-year-old girl we did the Sauvé and Kapandji operation without additional radius osteotomy. The operation was justified by the protrusion of the head of the ulna, the limitation of the rotation and diminution of the strength of the wrist, and inability to do sporting activity. The clinical findings were referred to the instability of the inferior radio ulnar joint There was no pain. The post operative review showed no pain, with recovery of grasp and of sporting activity (gymnastic and dance). The esthetic result satisfied the surgeon and the patient The operation permitted repositioning of the inferior radio ulnar joint. We have not seen synostosis of the osteotomy and the width of it increased progressively without radiological and physical instability of the inferior radio ulnar joint. The literature study allows us to discuss the different treatment possibilities and to explain our choice.The simplicity of this operation is interesting, because it was possible to stabilize the carpal joint, with abolition of the physical problems of this youg girl, without the needing osteotomy of the radius, which takes longer to recover, in those cases without pain before the operation.     

Carpal impaction with the ulnar styloid process: treatment with partial styloid resection

Carpal impaction with the ulnar styloid process (stylocarpal impaction) occurs less frequently than with the ulnar head (ulnocarpal impaction), and more commonly develops in wrists with negative ulnar variance. Physical examination, radiographic evaluation, and wrist arthroscopy are all helpful in excluding alternative causes of ulnar wrist pain. When an ulnocarpal stress test elicits pain, and radiographs suggest that this is due to carpal impaction with the ulnar styloid, partial resection of the styloid process provides successful treatment, so long as the insertion of the triangular fibrocartilage at the base of the styloid is not disrupted.     

Mar shortening osteotomy in posttraumatic ulnar impaction syndrome

Twenty-eight patients (average age 45 years) with posttraumatic ulnar impaction syndrome underwent ulnar shortening osteotomy of 3–15 mm. Contributing factors were malunited fractures of the distal radius in 20, diaphyseal fractures of the ulna and radius in 6, resection of the radial head and a traumatic tear of the triangular fibrocartilage in 1 patient each. Evaluation at an average follow-up of 20 months showed a high rate of satisfied patients (89%), but according to Chun's modification of the Gartland-Werley score there were 1 excellent (3.5%), 11 good (39.5%), 11 fair (39.5%) and 5 poor (17.5%) results. Degenerative changes of the distal radioulnar joint were associated with fair and poor results, and ulnar shortening osteotomy is only recommended in ulnocarpal impaction with an intact distal radioulnar joint. Osteotomy fixation with 3.5 mm dynamic compression plates enabled immediate postoperative mobilisation and resulted in a low complication rate. There was no advantage for the technically more demanding oblique as compared with a transverse osteotomy.     

Pressures in the distal radioulnar joint: effect of surgical procedures used for Kienbock's disease

Radial shortening and ulnar lengthening are two accepted surgical methods for treating Kienbock's disease. The effect of these procedures on the pressure within the distal radioulnar joint between the ulnar head and the sigmoid notch of the radius was experimentally evaluated in six fresh cadaver forearms. Radical shortening and ulnar lengthening led to increased pressure at the distal radioulnar articulation and caused shifting of the location of the center of pressure distally within the sigmoid notch. Radial displacement of the distal radial fragment at the time of radial shortening, however, decreased the peak pressures. Based on these experimental data, ulnar lengthening and radial shortening can be expected to alter the normal biomechanics of the distal radioulnar joint.     

青年桡骨远端陈旧性骨折继发下尺桡关节重度脱位的手术治疗

目的 探讨青年桡骨远端陈旧性骨折继发下尺桡关节重度脱位的手术治疗方法.方法 采用短缩尺骨、重建下尺桡关节法,对7例桡骨陈旧性骨折、短缩,下尺桡关节重度脱位患者进行治疗.术后对患者腕关节外形、功能进行随访.结果 所有患者外形恢复良好,功能评价优6例,良1例.结论 短缩尺骨、重建下尺桡关节法是治疗桡骨陈旧性骨折、短缩,下尺桡重度脱位的有效方法.     

Editorial Commentary: Triangular Fibrocartilage Complex “Fovea”—An Attractive and Complicated Structure—Is “The Anchor” Not Only for Distal Radioulnar Joint but Also for Wrist Surgeons

A triangular fibrocartilage complex foveal lesion is one of the key structures for stabilizing the distal radioulnar joint. Its anatomy is unique and healing potential is still controversial. If surgical repair is necessary, ulnar abutment is contraindicated, evaluation of the ligament condition using distal radioulnar joint arthroscopy is crucial to achieve satisfactory results.