Arthroscopic Double-Row Suture Anchor Fixation of Minimally Displaced Greater Tuberosity Fractures

In cases of displaced greater tuberosity fractures, treatments by arthroscopic-assisted reduction and percutaneous screw fixation have been reported. However, in cases in which there is a comminuted fracture or a minimally displaced fracture combined with concomitant lesions such as rotator cuff tear or labral pathology, it is difficult to reduce the fracture and to treat other pathologies by use of a percutaneous screw. Recently, many surgeons have used the double-row repair method in rotator cuff repair, which provides a tendon-bone interface better suited for biologic healing and restoring normal anatomy. In accordance with this method, we used the arthroscopic technique of double-row suture anchor fixation for a minimally displaced greater tuberosity fracture without additional incision. Initially, debridement was performed on the fracture surface by use of a shaver, and the medial-row anchor was inserted through the anterior portal or the intact cuff. Two lateral-row anchors were inserted just anterior and posterior to the lower margin of the fractured fragment under C-arm guidance. The medial-row sutures and lateral-row sutures were then placed. Arthroscopic double-row suture anchor fixation of a displaced greater tuberosity fracture restores the original footprint of the rotator cuff and normal tendon-bone interface of the displaced greater tuberosity fracture.     

Fracture Line Morphology of Greater Tuberosity Fragments of Neer Three- and Four-Part Proximal Humerus Fractures

Objective

In complicated Neer three- and four-part proximal humerus fracture (PHF), greater tuberosity (GT) fragments are often comminuted, and the currently widely used locking plate may not fix GT fragments effectively. A further understanding of morphological characteristics of the GT fragments may help explore new fixation devices. This study aimed to determine the fracture line morphology of the GT fragment of Neer three- or four-part PHF and analyze the location relationship between the locking plate and the GT fragment.

Methods

Seventy-one three-dimensional computed tomography scans of Neer three- and four-part PHF were retrospectively reviewed between January 2014 and June 2019. Fracture fragments were reconstructed and virtually reduced in the Mimics software, and fracture lines of GT fragments were depicted on a humerus template in the 3-matic software and then were superimposed altogether. The common sites of the GT fracture were identified, and the location relationship between the locking plate and GT fragments was analyzed in a computer-simulated scenario.

Results

The fracture line morphology of GT fragments was similar between Neer three- and four-part PHF. The overall morphology of GT fragments was in a fan shape, which could be summarized as anterior, superior, posterior, and middle lines. Of these, we identified 51 split and 29 avulsion type GT fragments based on the Mutch classification, and they could occur simultaneously in a PHF. The overall morphology of split type fragments was in a fan shape, and avulsion type fragments showed a quite distinguishable distribution pattern. A GT fragment could be classified as anterior-split, posterior-split, complete-split, anterior -avulsion, and posterior-avulsion type based on its morphology and location. The median percentage of fragment area covered by the plate was 32.3% in all of the fragments, and it was 69.4%, 23.0%, 37.2%, 21.8%, 0.0% in anterior-split, posterior-split, complete-split, anterior-avulsion, and posterior-avulsion type GT fragments. We defined the posterior-split, anterior-avulsion, and posterior-avulsion type GT fragments as the risky GT fragments, and they occurred in 43 (60.6%) Neer three- and four-part PHFs.

Conclusion

The fracture line morphology of GT fragments of Neer three- and four-part PHF was in a fan shape. GT fragments could be classified based on their location and morphology. The extent of GT fragment coverage provided by the locking plate differed in various fragment types, and we identified the anterior-avulsion, posterior-avulsion, and posterior-split type fragments as the risky GT fragments with a high incidence rate in Neer three- and four-part PHFs.     

Open Reduction and Stable Internal Fixation Using a 3.5-mm Locking Hook Plate for Isolated Fractures of the Greater Tuberosity of the Humerus: A 2-Year Follow-up Study Using an Innovative Fixation Method

BackgroudThe best treatment for isolated greater tuberosity (GT) fractures is still controversial. Although previous studies have suggested surgical options, they are either unable to provide firm fixation or present with a variety of complications.MethodsWe retrospectively studied the records of patients with isolated GT fractures who underwent open reduction and internal fixation using a 3.5-mm locking hook plate between January 2016 and January 2018. The surgical indication was an at least 5-mm displacement of the GT as observed in either simple radiography or three-dimensional computed tomography. Clinical outcomes were assessed using the following five parameters shortly before implant removal and at the final follow-up: visual analog scale (VAS) pain score, American Shoulder and Elbow Surgeons (ASES) score, Shoulder Rating Scale of the University of California, Los Angeles (UCLA), Constant-Murley score, and range of motion.ResultsTwenty-one patients with a mean age of 64 years were included. Bone union was achieved within 12–20 weeks of the first surgery in all patients. Implant removal was performed between 13 and 22 weeks after surgery. At the final follow-up, the mean VAS pain score, forward flexion, abduction, external rotation, internal rotation, ASES score, UCLA score, and Constant-Murley score were significantly better when compared to outcomes shortly before implant removal (p < 0.001, p < 0.001, p < 0.001, p = 0.008, p = 0.003, p < 0.001, p < 0.001, and p < 0.001, respectively).ConclusionsThe 3.5-mm locking hook plate provided sufficient stability and led to satisfactory clinical and radiological outcomes for isolated GT fractures. However, the hook plate may irritate the rotator cuff, and postoperative stiffness may be inevitable. Therefore, second surgery for implant removal is necessary after bone union is achieved.     

A Transosseous Suture as an Alternative to Suture Anchor on Anterior-Avulsion Greater Tuberosity Fragment Fixation in Neer Three-Part Proximal Humeral Fracture: A Biomechanical Study

Objective

Greater tuberosity (GT) fragments were communicated, and additional techniques to increase the GT fragment stability after the locking plate fixation was necessary. This study aimed to analyze the reinforcement effects on the anterior-avulsion GT fragment in Neer three-part proximal humeral fractures (PHFs) using transosseous suture and suture anchor techniques.

Methods

Eighteen fresh-frozen human cadaveric shoulder specimens were used in the study. Standardized fracture of the GT and surgical neck was created in 18 human cadaveric proximal humerus. The GT fragments were reinforced with transosseous suture (TS), suture anchor (SA), and suture in addition to the PHILOS plate fixation. The fixed humerus was tested by applying static loading to the supraspinatus tendon. Load forces and fragment displacement were evaluated by a biomechanical testing machine, and the load to 3- and 5-mm displacements, load to failure, and mode of failure were recorded for all specimens. Nonparametric variables were examined by the Kruskal–Wallis test, and the Bonferroni post hoc test was used to analyze the mean loads to create 3- and 5-mm displacements as well as the failure load.

Results

The age, female proportion, and bone mineral density showed no statistically significant differences between the three groups. The mean loading force to create 3-mm and 5-mm displacement in the TS group (254.9 ± 77.4, 309.6 ± 152.7) were significantly higher than those in the suture group (136.1 ± 16.7, 193.4 ± 14.5) (P = 0.024, P = 0.005). For the SA group, the force to create 3- and 5-mm displacement (204.3 ± 60.9, 307.8 ± 73.5) were comparable to those in the TS group (P = 0.236, P = 0.983). Moreover, the loading force to failure in the TS group (508.6 ± 217.7) and SA group (406.6 ± 114.9) was significantly higher than that in the suture group (265.9 ± 52.1) (P = 0.021, P = 0.024). In the TS group, three failed due to tendon-bone junction rupture; bone tunnel broken occurred in two specimens; suture rupture could also be seen in one specimen. All specimens in the suture group failed because of suture rupture. In the SA group, three specimens failed due to suture rupture; two failed secondary to tendon-bone junction rupture; and one failed because of shaft fracture.

Conclusions

Transosseous suture is a new type of reinforcement for GT fragment in Neer-three part PHFs. The transosseous suture was superior to the suture only in the reinforcement of the anterior-avulsion GT fragment of Neer three-part PHFs, and it had comparable biomechanical strength to the suture anchor.     

Dual Locking Plate Osteosynthesis for 3- or 4-Part Proximal Humeral Fractures Combined with Multiple Fractures of the Greater Tuberosity

BackgroundThis retrospective study was conducted to evaluate the efficacy of dual locking plate osteosynthesis for treating 3- or 4-part proximal humeral fractures combined with multiple fractures of the greater tuberosity.MethodsFrom January 2012 to December 2018, 19 skeletally mature patients, who suffered 3- or 4-part proximal humeral fractures combined with multiple fractures of the greater tuberosity, were treated with open reduction and internal fixation using a dual locking plate technique through a delto-pectoral approach. Indexes for evaluation included fracture healing, quality of reduction, and incidence of complications (infections, screw perforation into the glenohumeral joint, subacromial impingement, hardware failure, avascular necrosis, and loss of reduction). Shoulder function was evaluated using Constant–Murley scoring.ResultsThe patients were assessed at a mean time of 25.3 months after surgery. Union of fractures was radiographically confirmed for all 19 patients. The mean Constant–Murley patient score was 85.2 points, and complications were identified in two patients during follow-up evaluations.ConclusionsThe method of using dual locking plate osteosynthesis through a delto-pectoral approach resulted in a satisfactory union rate, excellent fracture reduction, low complication rate and good shoulder function for patients with complex proximal humeral fractures. The method is effective for treating 3- or 4-part proximal humeral fractures combined with multiple fractures of the greater tuberosity.     

A Modified Suture-Bridge Technique for a Marginal Dog-Ear Deformity Caused During Rotator Cuff Repair

Recently, the suture-bridge technique was found to maximize the utility of a single-row construct by using the suture limbs from the medial mattress sutures to bridge and compress the repaired tendon. However, the formation of marginal dog-ear deformities at a repaired rotator cuff is not uncommon with the suture-bridge technique. If a dog-ear deformity is observed at the margin after completion of the rotator cuff repair, the detached marginal cuff is pierced via a suture hook. One strand of the uncut suture in the lateral row is transported through the deformed cuff. A nonsliding knot is seated on top of the detached cuff and presses this area of soft tissue firmly onto the bone. If necessary, these steps are repeated for the other side of the detached rotator cuff. After completion of the rotator cuff repair, a “zigzag” pattern of compression of the cuff against the bone footprint without detachment of the rotator cuff is observed. After repair of the rotator cuff tear via the suture-bridge technique, the benefit of our simple technique for treating a marginal detached cuff is that the footprint contact area of the rotator cuff is restored completely, without the need for additional suture anchors.     

Avulsion Fracture of the Calcaneal Tuberosity: Classification and Its Characteristics

Background

Not much is known regarding avulsion fractures of the calcaneal tuberosity. We propose a modified classification scheme that presents the four types of calcaneal avulsion fracture as described by surgical and magnetic resonance imaging (MRI) findings, and evaluation of their specific features.

Methods

Out of 764 cases of calcaneal fractures, we examined 20 cases (2.6%) that involved the tuberosity of the calcaneus. Each case was classified depending on the avulsed fracture patterns as follows; type I is a ''simple extra-articular avulsion'' fracture, type II is the ''beak'' fracture, type III is an infrabursal avulsion fracture from the middle third of the posterior tuberosity, and finally in type IV there is the ''beak'', but a small triangular fragment is separated from the upper border of the tuberosity. We examined the features of each avulsed type according to several criteria including patient age, gender, anatomical variances of the Achilles tendon, the fibers involved and the mechanism of injury.

Results

The type I fracture (8/20 cases) was the most common and likely to occur in elderly women. However, in other types, they were more common in relatively younger male patients. Type I were usually caused due to an accidental trip causing a fall by the patient. However, the dominant cause of type II (5/20 cases) fractures a direct blow or hit directly to the bone. Type III (4/20 cases) and IV (3/20 cases) fractures were likely to occur due to falling. All fibers within the Achilles tendon are involved in both type I and II fractures. However, only the superficial fibers are involved in type III fractures, whereas the deep fibers are involved in type IV fractures.

Conclusions

The avulsion patterns of the calcaneal tuberosity fractures are the result of several factors including the bony density level, the mechanism of injury and the fibers of the Achilles tendon that transmit the force. Accurate diagnosis of type III and IV is dependant on MRI technology to confirm the specific location of the injury and provide proper patient treatment therapeutics.     

肩关节镜下缝线桥技术治疗巨大肩袖撕裂的前瞻性研究

目的 探讨肩关节镜下缝线桥技术治疗巨大肩袖损伤的临床效果。方法 选取我科2018年1月至2020年9月收治的肩袖巨大撕裂病人120例,随机纳入单排缝合组、双排缝合组和缝线桥组,每组40例。比较三组病人治疗前后肩关节疼痛视觉模拟量表（visual analogue scale,VAS）评分、肩关节Constant-Murley功能评分、加州大学洛杉矶分校（University of California at Los Angeles,UCLA）肩关节评分和美国肩肘外科协会（American Shoulder and Elbow Surgeons,ASES）评分及术后并发症发生情况。结果三组病人术后3个月时VAS评分未见明显统计学差异,但是缝线桥组术后6个月及9个月时VAS评分较单排缝合及双排缝合组明显降低,差异具有统计学意义（P<0.05）;术后3、6、12、24个月,缝线桥组的Constant-Murley功能评分、UCLA评分和ASES评分均较单排缝合组及双排缝合组明显增高,差异具有统计学意义（P<0.05）;缝线桥组病人再撕裂发生率较单排缝合组及双排缝合组明显降低,差异...     

Bilateral Avulsion Fractures of the Tibial Tuberosity: A Double Case for Open Reduction and Fixation

Abstract Tibial tuberosity fractures are rare and occur mainly in adolescent males during vigorous quadriceps contraction. So far, only ten simultaneous bilateral fractures have been reported. We report the case of a 16-year-old male who avulsed both tibial tuberosities when he landed on his feet after a gymnastics routine. Diagnostic imaging demonstrated Ogden Type IIIA fractures. He underwent bilateral open reduction and screw fixation with a good functional result after 3 months. While closed reduction and percutaneous fixation has been proposed by some, the intraoperative findings in our patient would have prevented correct adaptation of the fragments because of a flap of periosteum impinged in both fracture gaps. This case emphasizes that minimally invasive techniques may sometimes be inappropriate in the management of these types of fractures.     

Arthroscopic Grafting of Greater Tuberosity Cyst and Rotator Cuff Repair

Cysts of the greater tuberosity can be a normal finding independent of age and concurrent rotator cuff tear. The presence of a large greater tuberosity cyst can present a challenge at the time of rotator cuff repair. We present a 1-step arthroscopic technique to address these defects at the time of rotator cuff repair using a synthetic graft (OsteoBiologics, San Antonio, TX) originally designed to address osteoarticular defects. With the viewing portal established laterally, a portal allowing perpendicular access to the cyst is established. The cyst is thoroughly debrided, and a drill sleeve is then introduced perpendicular to the surrounding bone, serving as a guide for the matching drill to create a circular socket. A correspondingly sized TruFit BGS cylindrical implant (OsteoBiologics) is then implanted by use of the included instrumentation. The scaffold is placed flush with the surrounding bone. Because our arthroscopic rotator cuff protocol uses a tension-band technique with placement of suture anchors distal and lateral to the rotator cuff footprint, we are subsequently able to proceed with routine rotator cuff repair.     

Arthroscopic double-pulley suture-bridge technique for rotator cuff repair

After preparation of the bone bed, two doubly loaded suture anchors with suture eyelets are inserted at the articular margin of the greater tuberosity. A retrograde suture-passing instrument penetrates the rotator cuff to retrieve the sutures through the modified Neviaser or subclavian portal. An ipsilateral pair of suture eyelets in the suture anchor is passed through the margins of the rotator cuff tear. The blue suture of the second and third pair is pulled out of the lateral cannula, and the threaded blue suture of the third pair in the needle is passed through the blue suture of the second pair. After retrieving the blue suture of the first pair through the anterior portal, it is pulled out to pass the blue suture of the third pair through the eyelet of the anteromedial anchor. The blue suture is linked between two anchors. The medial row of suture-bridge is repaired with a sliding knot, and the sutures are not cut. Once the rotator cuff repair using the suture-bridge technique has been performed, the two blue strands in the anterior portal are tied. We describe our technique that possesses the advantages of both the double-pulley and suture-bridge techniques, which improves the pressurized contact area and maximizes compression along the medial row.     

Isolated tuberosity fractures of the proximal humeral: current concepts

Despite the relatively common occurrence of fractures of the proximal humeral amongst the elderly, the subgroup of isolated greater and lesser tuberosity fractures have remained less well understood. While the majority of two-part fractures result from a standing-height fall onto an outstretched hand, isolated tuberosity fractures are also commonly associated with glenohumeral dislocations or direct impact to the shoulder region. Inasmuch as isolated greater tuberosity fractures are considered uncommon, isolated lesser tuberosity fractures are generally considered exceedingly rare. Non-operative treatment including a specific rehabilitation protocol has been advocated for the majority of non-displaced and minimally displaced fractures, with generally good outcomes expected. The treatment for displaced fractures, however, has included both arthroscopically assisted fixation and open or percutaneous reduction and internal fixation (ORIF). The choice of fixation and approach depends not only on fracture type and characteristics, but also on a multitude of patient-related factors. With an expected increase in the level of physical activity across all age groups and overall longer lifespans, the incidence of isolated tuberosity fractures of the proximal humeral is expected to rise. Orthopaedic surgeons treating shoulder trauma should be aware of treatment options, as well as expected outcomes.     

三叶草钢板治疗肱骨近端移位骨折

目的探讨肱骨近端移位骨折采用三叶草钢板治疗的临床价值。方法用三叶草钢板治疗肱骨近端骨折38例,按N eer分类,二部分骨折20例,三部分骨折13例,四部分骨折5例,其中骨折伴脱位3例。结果36例获得平均13个月(3~28个月)随访,2例失访。36例均骨性愈合,无畸形愈合,无肱骨头坏死。按N eer评分标准评分,优27例,良6例,可2例,差1例,总优良率91.6%。结论采用三叶草钢板内固定治疗肱骨近端移位骨折,固定牢靠,可早期功能训练,术后功能恢复满意,值得提倡。