Application of intermittent flap opening in L-shaped surgical incision of calcaneal fracture / 中国骨伤

OBJECTIVE@#To explore clinical effect of intermittent flap opening technique in L-shaped incision of calcaneal fracture.@*METHODS@#From January 2017 to January 2019, 48 patients with Sanders typeⅡ to Ⅳ calcaneal fractures were treated by open reduction and internal fixation. According to different flap opening techniques, the patients were divided into control group and observation group, 24 patients in each group. In observation group, there were 17 males and 7 females, aged from 20 to 60 years old with an average of(45.12±9.56) years old;7 patients were typeⅡ, 10 patients were type Ⅲ and 7 patients were type Ⅳ according to Sanders classification;3 patients were C0, 16 patients were C1 and 5 patients were C2 according to Tscherne-Gotzen soft-tissue assessment;treated with intermittent flap technique. In control group, there were 19 males and 5 females aged from 20 to 60 years old with an average of (47.32±10.67) years old;7 patients were typeⅡ, 11 patients were type Ⅲ and 6 patients were type Ⅳ according to Sanders classification;2 patients were C0, 18 patients were C1 and 4 patients were C2 according to Tschemc-Gotzen soft-tissue assessment;treated with static flap opening technique. Operation time, flap retraction time, changes of Böhler angle and Gissane angle before and after operation at 3 days, and occurrence of incision complications were observed and compared between two groups.@*RESULTS@#All patients were followed up from 3 to 6 months with an average of(4.52±1.01) months. There were no significant differences in operation time, changes of Böhler angle and Gissane angle before and after operation at 3 days between the two groups(P>0.05);there was statistical difference in flap retraction time between two groups(P<0.05). Occurrence of incision complications in observation group was significantly lower than that in control group (P<0.05).@*CONCLUSION@#Intermittent flap opening technique is superior to static opening technique in reducing incision complications of lateral "L" approach of calcaneus. Single Kirschner wire opening does not affect the exposure, reduction and fixation of fracture during operation.

Treatment of Sanders typeⅡto Ⅲ calcaneal fractures with percutaneous reduction and minimally invasive calcaneal screw fixation / 中国骨伤

OBJECTIVE@#To investigate clinical effect of percutaneous reduction combined with internal fixation of calcaneal nail in treating Sanders typeⅡto Ⅲ calcaneal fractures.@*METHODS@#From July 2017 to August 2019, clinical data of 98 patients with Sanders typeⅡto Ⅲ calcaneal fractures treated were retrospectively analyzed, and divided into observation group and control group according to different surgical methods. In observation group, there were 35 males and 21 females, aged from 23 to 58 years old with an average of (34.50±7.81) years old;29 patients with Sanders typeⅡand 27 patients with Sanders type Ⅲ;30 patients on the left side and 26 patients on the right side;the time from fracture to operation ranged from 1 to 4 days with an average of (3.45±0.54) days;and treated with percutaneous reduction combined with internal fixation of calcaneal nail system. In control group, there were 25 males and 17 females, aged from 25 to 60 years old with an average of (35.27±7.64) years old;23 patients with Sanders type Ⅱ and 19 patients with Sanders type Ⅲ;24 patients on the left side and 18 patients on the right side;the time from fracture to operation ranged from 2 to 5 days with an average of (3.42±0.62) days;and treated with open reduction and internal fixation. Operation time, blood loss, hospital stay, fracture healing time, and postoperative visual analogue scale (VAS) at 1 day, preoperative and postoperative American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score, Böhler angle, Gissane angle and calcaneus width, and postoperative complications were compared between two groups.@*RESULTS@#All patients were followed up from 13 to 18 months with an average of (15.6±2.2) months. There were significant differences in operation time, blood loss, hospital stay, fracture healing time and postoperative VAS at 1 day between two groups (P<0.05). There was statistical difference in postoperative AOFAS score at 12 months between two groups (P<0.05), and AOFAS score at 12 months after operation was higher than that before operation (P<0.05). According to AOFAS score, 21 patients got excellent result, 30 good and 5 moderate in observation group, and 10 excellent, 22 good, 7 moderate and 3 poor in control group, which had statistical difference between two groups (P<0.05). Postoperative Böhler angle, Gissane angle and calcaneus width at 6 months were better than that before operation between two groups(P<0.05). One patient in observation and 20 patients in control group occurred skin numbness after operation, and 14 patients occurred skin necrosis in control group, there were obvious difference between two groups(P<0.01).@*CONCLUSION@#Compared with open reduction and internal fixation, percutaneous reduction combined with internal fixation system in treating Sanders typeⅡto Ⅲ calcaneal fractures is feasible for fracture repair without waiting for foot deswelling, which could accurately restore normal shape and position of the fractured heel bone, completely eliminate fracture malunion, and reduce postoperative complications. Therefore, it could shorten operation time, hospital stay, fracture healing time, reduce amount of blood loss, promote postoperative recovery, and less complications, high safety, which could be used as a choice of orthopedic surgery for foot and ankle trauma.

Anatomic classification of the sustentaculum tali and its characteristics analysis / 解剖学报

Objective To explore the anatomical morphology and characteristics of the sustentaculum tali based on CT three⁃dimensional reconstruction, so to provide anatomical support for the treatment of calcaneal fractures with screw implantation. Methods From March 2019 to March 2020, a total of 336 adult calcaneal CT three⁃dimensional reconstruction images from the Affiliated Hospital of Traditional Chinese Medicine of Southwest Medical University were collected after exclusion of inclusion criteria. The CT three⁃dimensional reconstruction of calcaneus was classified according to the β, the prolate axial intersection between sustentaculum tali and calcaneus on the normal posterior. Reference points, β; AB, the distance from the inside of sustentaculum tali to the inside of posterior talar articular surface; AC, the distance from the inside of sustentaculum tali to the outside of posterior talar articular surface; AD, the distance from the inside of sustentaculum tali to lateral of calcaneal; AE, the distance from the inside of sustentaculum tali to medial process of calcaneal tuberosity; AF, the distance from the inside of sustentaculum tali to calcaneal tuberosity; AG, the distance from the inside of sustentaculum tali to lateral process of calcaneal tuberosity. The results were statistically analyzed according to type, sex and body side. Results Under the β, the sustentaculum tali was classified into three types: typeⅠ(β<70°, 68 cases, 20.24%), type Ⅱ(70°≤β<80°, 153 cases, 45.54%), type Ⅲ(80°≤β<90°, 115 cases, 34.23%). For the distance of β, AB, AF, there were statistical differences between type Ⅲ and other types (P<0.05). For the distance of AE, there were statistical differences between type Ⅲ and typeⅠ(P<0.05). Meanwhile, for the distance of AB, AC, AD, AE, AF, AG, there were statistical differences between male and female (P<0.05). For the distance of β, AB, there were statistical differences between right and left (P<0.05). Conclusion Under the β, the sustentaculum tali is classified into three types, with the typeⅡas the main type. When treating calcaneal fractures with internal fixation, direction of screw implant can choose between 70° to 80° as soon as possible. The morphology and classification of sustentaculum tali are of certain clinical implication to treat calcaneal fractures.

Analysis of factors related to postoperative functional recovery after surgery of calcaneal fracture / 中华创伤骨科杂志

Objective:To analyze the factors influencing functional recovery after surgery of calcaneal fracture.Methods:A retrospective analysis was performed in 1,080 eligible patients with calcaneal fracture who had been admitted to The Third Hospital of Hebei Medical University from January 1, 2018 to December 31, 2020. They were 931 males and 149 females with a mean age of 43.0 years. By the Sanders classification, there were 107 cases of type Ⅰ, 343 cases of type Ⅱ, 471 cases of type Ⅲ and 159 cases of type Ⅳ. Multiple linear regression model was used to screen out the main relevant factors affecting the postoperative functional recovery by analyzing the 18 factors which might influence the postoperative functional recovery like gender, age, Sanders type, occupation, body mass index, season, cause, hospital stay, operation method, internal fixation, preoperative combined injury, preoperative complication, anesthesia, attendance to rehabilitation institution, incision selection, waiting time, preoperative blister and reduction quality.Results:All the 1,080 patients were followed up for 17.5 months on average. The mean Creighton-Nebraska score at the last follow-up was 88.4. The univariate analyses showed statistically significant differences in the Creighton-Nebraska score among patients with different gender, age group, Sanders type, occupation, injury cause, surgical method, preoperative combined injury, incision selection and reduction quality ( P<0.05). Multiple linear regression model analysis resulted in the following regression equation: Y=107.408-4.013×gender-7.101×age-1.214×Sanders type-1.606×incision selection. Conclusions:The factors which influence the functional recovery after surgery of calcaneal fracture may be gender, age, fracture type and incision selection; the functional recovery score after surgery of calcaneal fracture may be low for female senior patients with type Ⅳ fracture and a large L-shaped incision.

Joint preserving triplane osteotomy for intra-articular calcaneal fracture malunion / 中华创伤骨科杂志

Objective:To observe the curative effects of triplane intra-articular osteotomy in the treatment of malunion of calcaneal intra-articular fracture.Methods:The 16 patients were retrospectively analyzed who had been admitted to Foot and Ankle Surgery Department, Honghui Hospital from January 2016 to December 2019 for malunion of calcaneal intra-articular fracture. They were 12 males and 4 females, with an average age of 43.4 years (from 31 to 58 years). The left side was affected in 10 cases and the right side in 6 cases. All malunions were type Yu Ⅱ (compressed bone fragments on the posterior articular surface) and treated with triplane intra-articular osteotomy. The curative effects were assessed by comparing the radiological parameters, American Orthopaedic Foot and Ankle Surgery Society (AOFAS) ankle-hindfoot score, pain visual analog scale (VAS) and psychological and physical scores in Health Survey 12-item Short Form (SF-12) between preoperation and the final follow-up.Results:All the patients were followed up for 20 to 60 months (average, 42.9 months); the bone healing time was 10 to 14 weeks (average, 11.5 weeks). At the final follow-up, their B?hler angle (25.7°±2.3°), Gissane angle (117.1°±5.8°), Meary angle (2.9°±1.3°), talocalcaneal angle (31.3°±3.0°), hindfoot alignment angle (3.9°±1.8°), ankle height [(82.3±2.6) mm], calcaneus height [(56.9±2.4) mm], calcaneus width [(41.4±2.1) mm], AOFAS ankle-hindfoot score [(82.3±7.3) points], median VAS score [3 (2, 3) points], SF-12 psychological score [(46.6±3.6) points], and SF-12 physiological score [(43.6±3.5) points] were significantly improved than the preoperative values [8.4°±2.7°, 137.5°±9.3°, 8.3°±4.3°, 24.6°±3.7°, -4.6°±3.2°, (76.1±3.1) mm, (53.8±3.0) mm, (50.2±2.2) mm, (51.9±7.7) points, 6 (6, 7) points, (37.5±3.8) points, and (31.0±2.6) points] (all P<0.01) Conclusion:In the treatment of type Yu Ⅱ malunion of calcaneal intra-articular fracture, triplane osteotomy can anatomically reduce the bone fragments of collapsed posterior articular surface, reshape the normal anatomy of the calcaneus, and preserve the subtalar joint, leading to positive short- and mid-term follow-up effects.

Fractura intraarticular de calcáneo asociada a lesión de ligamentos colaterales laterales del tobillo / Intra-articular fracture of the calcaneus associated with injury to lateral collateral ligaments of the ankle

Resumen: Las fracturas de calcáneo son las más frecuentes del tarso (3.5% de todas las fracturas). Afectan a adultos jóvenes, siendo más frecuentes en hombres (5.9:1). Por otro lado, las lesiones ligamentarias asociadas a fractura de calcáneo no son muy frecuentes. Presentamos un caso de un paciente de 39 años que sufrió entorsis de tobillo. Mostraba inestabilidad en flexión plantar e inversión. Radiografías mostraron una fractura de calcáneo. Durante la cirugía se evidenció una lesión completa del complejo ligamentario lateral. Se realizó la reducción y osteosíntesis asociada a la reconstrucción ligamentaria. Ante fracturas de calcáneo es importante corroborar la estabilidad del tobillo. La falta de diagnóstico en este tipo de lesiones puede generar inestabilidades crónicas.

Abstract: Calcaneal fractures are the most frequent of the tarsus (3.5% of all fractures). Young adults are mainly affected, being more frequent in men (5.9:1). On the other hand, ligament injuries associated with fracture of the calcaneus are very infrequent. We describe a case of a 39 year old patient who suffered ankle trauma. He presented instability in plantar flexion and inversion. A fracture of the calcaneus was diagnosed. During surgery, a complete lesion of the lateral ligament complex was found. The reduction and osteosynthesis associated with ligament reconstruction was performed. We consider important to confirm the stability of the ankle after a calcaneus fracture. Lack of diagnosis in this type of injuries can evolve into chronic instability.

Biomechanical Comparison of Two-Point and Three-Point Fixation for Treating SandersⅢ Calcaneal Fracture / 医用生物力学

Objective To analyze the biomechanical feasibility of two-point fixation by distal radius plate for the treatment of SandersⅢ calcaneal fractures. Methods The three-dimensional (3D) finite element musculoskeletal foot model was established based on CT and MRI images, which comprised bones, muscles, plantar fascia, ligaments and soft tissues. After validation, the SandersⅢ calcaneal fracture models fixed by distal radial plate (two-point fixation) and calcaneal plate (three-point fixation) were established, so as to compare the biomechanical characteristics of two calcaneal models. Results The maximum stress of the two-point fixation and three-point fixation model was 324.70 and 407.90 MPa, respectively. The maximum displacements of the two models were 2.498 and 2.541 mm, respectively. There was no significant difference in the posterior articular surface displacement between the two models. In both models, the Bohler’s angle and Gissane’s angle were within the normal range. Conclusions The two-point fixation by distal radial plate can satisfy the biomechanical stability of calcaneal fracture treatment. Compared with traditional steel plate, the two-point fixation shows the advantage of smaller surgical trauma, more uniform overall stress distribution, early weight-bearing rehabilitation after surgery, which is a novel treatment recommended for treating calcaneal fractures.

Staged surgery of Sanders type Ⅳ calcaneal fractures with soft tissue three-degree swelling / 中国骨伤

OBJECTIVE@#To compare the clinical efficacy of staged surgery on Sanders Ⅳ calcaneal fractures with soft tissue Ⅲ swelling.@*METHODS@#The clinical data of 76 patients with Sanders type Ⅳ closed calcaneal fracture with soft tissue three-degree swelling treated from June 2017 to May 2020 was retrospectively analyzed, including 54 males and 22 females, aged from 25 to 50 (38.16±10.24) years. The patients were divided into observation group and control group according to different treatment methods. Twenty-four patients in the observation group were treated by staged surgery stageⅠclosed prying traction reduction and Kirschner wire fixation, stageⅡopen reduction and internal fixation with titanium plate, including 17 males and 7 females, aged from 25 to 50 (36.12±9.56) years. There were 52 patients in the control group, including 37 males and 15 females, aged from 25 to 50 (38.32±10.67) years, these patients were treated with open reduction and internal fixation with titanium plate after the dermatoglyphic signs appeared. The swelling subsidence time, the length of hospitalization days, and the incidence of postoperative incision complications were compared between two groups. The Bhler angle, Gissane angle, and calcaneal varus angle were measured by X-ray before and 6 months after operation. American Orthopedic Foot and Ankle Society (AOFAS) about the ankle hindfoot score was used to evaluate the clinical efficacy.@*RESULTS@#All 76 patients were followed up for 8 to 12 (9.52±2.01) months. The swelling subsidence time and hospitalization days in observation group were (12.12± 3.24) d and (24.53±6.44) d, respectively, which in control group were (15.16±4.16) d and (29.46±9.61) d, with statistical difference between two groups (@*CONCLUSION@#Compared with open reduction and internal fixation with titanium plate after the appearance of dermatoglyphic signs, staged surgery for Sanders type Ⅳ calcaneal fractures with soft tissue three-swelling does not increase the risk of soft tissue complications, and can significantly shorten the patient's swelling subsidence time and hospitalization days, improve the quality of fracture reduction and short term function, and relieve pain.

Short term outcome of open reduction and internal fixation with plating in displaced intra articular calcaneal fractures

Background: Calcaneum fractures constitute the majority of the tarsal bone fractures worldwide. There is no gold standard consensus as of now for the management of the displaced intra articular calcaneal fractures. Open reduction and internal fixation with plating is one of the management options available.Methods: Authors studied the results of open reduction and internal fixation with plating in 22 calcaneal fractures in a study with a minimum follow up of 6 months. Outcome was studied using Maryland foot score.Results: Authors observed excellent results in 5 patients (22.72%), good results in 12 patients (54.54%), fair results in 4 patients (18.18%) and poor result in 1 patient (04.54%). Authors encountered wound infection in 1 patient (4.54%), heel varus in 1 patient (4.54%), heel broadening in 1 patient (4.54%), reduced range of motion at ankle in 2 patients (9.9%) and persistent heel pain in 1 patient (4.54%).Conclusions: Open Reduction and Internal Fixation (ORIF) with calcaneum plating, through an extensive lateral approach, for displaced intra articular fractures of the calcaneum is an effective treatment modality with very good results in experienced hands.

Biometría del calcáneo en beneficio de la técnica quirúrgica: estudio cadavérico / Biometry of the calcaneus for the benefit of the surgical technique: Cadaver study

Introducción Es importante una elección adecuada de material de osteosíntesis en la técnica quirúrgica de fijación interna en fracturas del calcáneo, pues las dimensiones del calcáneo varían de una población a otra. En el manejo de estas fracturas muchas veces el material no se adecua al tamaño y morfología de cada paciente. Este estudio describe las características biométricas del calcáneo, para lograr un mayor entendimiento de las dimensiones de este. Materiales y Métodos Se realizó un estudio descriptivo, con 31 piezas óseas de calcáneos. Se midieron la longitud máxima, altura, longitud de la pared lateral al sustentáculo tali y, basadas en zonas de seguridad para el riesgo de lesión anatómica, se midió el ancho en cada zona. Los ángulos de Böhler y Gissane se midieron por fotografías y radiografías. Resultados La media de la longitud máxima fue de 67.14±4.51mm, la media de la longitud de la pared lateral al sustentáculo tali fue de 34.82±3.28mm, y la media de la altura fue de 40.11±3.40mm. El ancho tomado en 6 puntos diferentes, mostró que la zona IIIB presentó mayor ancho con una media de 25.35±2.67mm. La media de los ángulos de Böhler y Gissane fue de 25.45°± 4.80 y 25.86°±6; 122.9°± 5.81 y 114.15°± 9.86; respectivamente. Discusión Las medidas halladas en nuestra muestra son menores comparados a otras poblaciones, en tanto los ángulos no mostraron mayor variación. Estos hallazgos pueden usarse para la realización de investigaciones comparativas entre poblaciones, evaluando así condiciones patológicas y adaptaciones de protocolos terapéuticos.

Background The appropriate choice of osteosynthesis material in the surgical technique of internal fixation in calcaneal fractures is of great importance, since it varies from one population to another. In the management of calcaneal fractures, the material is often not adapted to the size and morphology of each patient. A study was carried out to describe the biometric characteristics of the calcaneus, for a better understanding of the dimensions of this bone in our population. Methods A descriptive study was conducted on 31 bone pieces of calcaneus. The maximum length, height, and length of the lateral wall to the posterior third of sustentaculum tali were measurement and, based on safety zones for risk of anatomical injury; the width was measured in each zones. The angles of Böhler and Gissane were measured by photographs and radiographs. Results The maximum length had a mean of 67.14±4.51mm, the mean of the length of the lateral wall to the posterior third of sustentaculum tali was 34.82±3.28mm, and the mean of the height was 40.11±3.40mm. The width was taken at 6 different points, observing that the zone IIIB has a greater width, with a mean of 25.35±2.67mm. The mean of the Böhler and Gissane angles was 25.45°±4.80 and 25.86°±6; 122.9°±5.81 and 114.15°±9.86; respectively. Discussion Measurements of our sample are smaller compared to other populations. However, the angles showed no greater variation. These findings can be used to conduct comparative studies between populations, for evaluating pathological conditions, and adaptations of therapeutic protocols.

Finite Element Analysis on Sanders II and III Calcaneal Fractures Treated with the Novel Composite Locking Plate / 医用生物力学

Objective To study the stress distribution and biomechanical stability of the long-type composite locking plate already used in clinic practice and the novel short-type composite locking plate for treating Sanders type IIa, IIb and IIIab calcaneal fractures. Methods The three-dimensional (3D) models of Sanders type IIa, IIb and IIIab calcaneal fractures were established, and the force conditions of calcaneus in neutral standing position and under 20°dorsal extension were simulated. By referring to the physical form of human specimens, 500 N vertical axial load was applied, so as to study the displacement and relative displacement of the fracture block under the force, and the force conditions of bone tissues and internal fixation were analyzed. Results For Sanders type IIa, IIb calcaneal fractures treated with long-type and short-type composite locking plates, the stress concentration positions of the plates and calcaneal fractures were basically the same. The maximum stress difference of the two plates for fixing calcaneal fractures with the same type was smaller than 5 MPa, and there was no significant difference in the maximum displacement of the fracture models. For Sanders type IIIab calcaneal fractures treated with long-type and short-type composite locking plates, the maximum stress concentration occurred in the forearm of plate screws, indicating the risk of metal fatigue. The maximum stress difference was up to 12 MPa, and the maximum calcaneal displacement was up to 9 μm. Conclusions The long-type and short-type composite locking plates showed no significant differences in treating Sanders type IIa, IIb calcaneal fractures. For fixing Sanders type IIIab calcaneal fractures, the long-type composite locking plate was superior to the short-type composite locking plate.

Comparison of percutaneous reduction by leverage combined with minimally invasive internal fixation and “l” incision internal fixation in the treatment of Calcaneal fracture / 中国组织工程研究

BACKGROUND: Intra-calcaneal fractures involving subtalar joints account for about 75% of all calcaneal fractures. Surgical treatment of displaced intra-articular calcaneal fractures is superior to non-surgical treatment. However, the timing of treatment, surgical indications, incision selection, and bone grafting are still controversial. The classical “L” approach is gradually replaced by minimally invasive internal fixation because of its high incision complications. OBJECTIVE: To compare the clinical effect of minimally invasive internal fixation and “L” incision for the treatment of Sanders II and III calcaneal fractures. METHODS: Sixty patients with Sanders II or III calcaneal fractures from January 2016 to January 2019 in the Second Department of Orthopedics, Shantou Hospital of Traditional Chinese Medicine were randomly divided into minimal invasion group (n=32) and “L” incision group (n=28). The patients in the minimal invasion group and “L” incision group received percutaneous reduction by leverage combined with minimally invasive internal fixation and “L” incision internal fixation treatment, respectively. At 6 months after operation, the curative effect of the two groups was evaluated according to the American Orthopedic Foot and Ankle Society score. Preoperative waiting days, the operation time, the length of stay and the complication incidence were compared between the two groups. Bfihler angle and Gissane angle were measured and compared preoperatively, postoperatively and during the final follow-up. RESULTS AND CONCLUSION: (1) The excellent and good rate of American Orthopedic Foot and Ankle Society score was 91% in the minimal invasion group and 93% in the “L” incision group (P > 0.05). (2) The postoperative Bohler angle and Gissane angle were significantly improved in both groups (P 0.05). Bohler angle was better in the “L” incision group than in the minimal invasion group (P 0.05). (3) The preoperative waiting days and the length of stay were longer in the “L” incision group than those in the minimal invasion group (P < 0.05). The operation time was shorter in the “L” incision group than in the minimal invasion group (P < 0.05). (4) The incidence of complications was lower in the minimal invasion group (9%) than in the “L" incision group (32%) (P < 0.05). (5) Compared with the traditional “L” incision open reduction and internal fixation, the treatment of Sanders II and III calcaneal fractures with percutaneous reduction by leverage combined with minimally invasive internal fixation are satisfactory, with less trauma and complications. It is worth being recommended in clinic.

Transtarsal sinus incision and traditional L-shaped incision for calcaneal fractures: A systematic evaluation and meta-analysis / 中国组织工程研究

BACKGROUND: Calcaneal fractures account for approximately 60% of all tarsal fractures, and 75% of calcaneal fractures are intra-articular. Surgical treatment can restore the shape and function of calcaneus well. In recent years, transtarsal sinus incision has been recognized and applied by clinicians, but the choice of surgical approach for calcaneal fractures is still controversial. OBJECTIVE: To systematically evaluate the efficacy and surgical safety of transtarsal sinus incision and traditional L-shaped incision in the treatment of calcaneal fracture. METHODS: PubMed, Cochrane, EMbase, CNKI, VIP and Wanfang databases were searched by computer for all randomized controlled trials comparing transtarsal sinus incision with traditional L-shaped incision in the treatment of calcaneal fractures. The retrieval time was from the establishment of the database to April 2019. The meta-analysis was carried out with RevMan 5.3 software after literature screening and data extraction based on inclusion criteria and exclusion criteria. RESULTS AND CONCLUSION: (1) A total of 522 patients were enrolled in 7 randomized controlled trials. (2) Meta-analysis results showed that there was no significant difference in Bohler angle [MD=0.14, 95%CI (-0.54, 0.81), P > 0.05], Gissane angle [MD=-0.19, 95%CI (-1.36, 0.98), P > 0.05] and Maryland score [MD=-0.25, 95%CI (-3.41, 2.91), P > 0.05] between the two incisions at the last follow-up. (3) American Orthopaedic Foot and Ankle Society score [MD=6.39, 95%CI(-0.09, 12.87), P=0.05] might be different. (4) Compared with the traditional L-shaped incision, the tarsal sinus incision had certain advantages in shortening the operation time [MD=-14.98, 95%CI (-23.90, -6.06), P=0.001 < 0.05], and lower incidence of postoperative complications [OR=0.18, 95%CI (0.08, 0.38), P < 0.000 1]. (5) For Sanders II and III calcaneal fractures, the transtarsal sinus incision has no obvious advantage over the traditional L-shaped incision in terms of curative effect. However, because the transtarsal sinus incision has a relatively small wound, it has the advantages of relatively short operation time and relatively low incidence of complications after operation. This suggests that the tarsal sinus incision is safe. However, due to the small sample size of the included study, the above conclusions still need to be verified by clinical trials with higher quality and larger sample size.

Effect of preserving the integrity of peroneal tendon sheath on hindfoot function after calcaneus fracture surgery / 中国组织工程研究

BACKGROUND: Calcaneal fracture is the most common patella fracture. Traditionally, surgical treatment via an enlarged lateral approach is the gold standard method for the treatment of calcaneal fractures. However, this method can lead to joint stiffness and peroneal tendon adhesion to different extents, resulting in postoperative foot pain. OBJECTIVE: To investigate the effect of preserving the integrity of peroneal tendon sheath on hindfoot movement during open reduction and internal fixation of calcaneus fractures. METHODS: A total of 160 patients with displaced intra-articular calcaneus fractures who were admitted to the Department of Foot and Ankle Surgery, Affiliated Hospital of Binzhou Medical University from July 2016 to September 2017 were randomly divided into a control group and an experimental group. The classical lateral “L” incision was used in both groups. In the control group, the calcaneus was exposed by traditional dynamic retraction of the fibular tendon, while the experimental group was treated by static retraction with the preservation of fibular tendon sheath. The trial protocol was approved by the Ethics Committee of the Affiliated Hospital of Binzhou Medical University on February 18, 2016 with the approval No. 2016-G026-01. RESULTS AND CONCLUSION: There were 156 patients with complete follow-up data, 78 in the control group and 78 in the experimental group. The visual analogue scale scores on the first day, Bohler angle and Gissane angle at the 3rd month, and ankle dorsiflexion and plantar flexion angle at the 6th month of internal fixation were similar in the two groups. Hind foot valgus and varus angles at the 6th month of internal fixation and the American Orthopedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Scale scores at the 1st year of internal fixation in the experimental group were better than those in the control group. Meanwhile, the excellent and good rate of Maryland hindfoot scoring system in the experimental group was higher than that in the control group at the last follow-up. There were four cases of incision complications in the control group (one case of infection and three cases of necrosis) and two cases of necrosis in the experimental group. These findings indicate that calcaneus fracture surgery with preserving the integrity of peroneal tendon sheath can significantly improve the mobility of the hindfoot, and improve the patient’s satisfaction, and meanwhile do not increase the incidence of incision complications.

Management Of Calcaneal Fractures With Tentacle Plate – Prospective Outcome Analysis

This is a prospective cohort study to evaluate the results of open reduction through an extensile lateral approach and internal fixation with calcaneal tentacle plate as surgical treatment of the displaced intra-articular calcaneal fracture. The extended lateral approach accounts for low incidence of complication. After suitable interval to improve the soft tissue status, this series recommend to take the cases for surgery between 14 to 21 days from the time of injury. Wound dehiscence is the common complication, which can be minimized by raising cutaneous-subcutaneous flap during incision. Prevention of collapse is mainly by the rigid fixation & perfect anatomical plating and delayed weight bearing. Bone grafting is needed for severely comminuted cases. We systematically obtained anatomical reduction, whatever the Sanders type. This reconstruction and subtalar joint congruence, essential for a good result. Post operative subtalar joint incongruence may lead to early subtalar arthritis, which can be managed with subtalar arthrodesis. Osteosynthesis of type II calcaneal fractures give excellent result compared to other fracture patterns. In case of contraindication relating to age, associated pathology such as diabetes or arteriopathy, or psychiatric disturbance, we advise plaster cast immobilization for relatively congruent fractures, and closed percutaneous pinning or screwing for more displaced and incongruent fracture. Proper pre-operative planning, rigid fixation with calcaneal tentacle plate and adequate screws through extensile lateral approach, anatomical reduction to achieve subtalar joint congruency, using bone grafts in comminuted fractures, early post op rehabilitation, delayed weight bearing will give good results in case of displaced intra articular calcaneal fracture K

Surgical Treatment for Displaced Intra-Articular Calcaneal Fractures in Elderly Patients: Comparison of the Minimally Invasive Approach and Extensile Lateral Approach

PURPOSE: As the functional demands for activities in elderly patients are increasing according to their life extension, the need for surgical treatment is also increasing in elderly patients with displaced intra-articular calcaneal fractures. In addition to the extensile lateral approach (ELA), which is a surgical procedure that showed good results on intra-articular calcaneal fractures, the minimally invasive approach (MIA) also showed an outstanding result. This study compared the radiological and clinical results of intraarticular calcaneus fractures in elderly patients in two groups: ELA and MIA. MATERIALS AND METHODS: Thirty patients aged over 65 years with intra-articular calcaneus fractures, who could be followed-up more than 14 months, were included in this study. Thirteen patients of the MIA group and 17 patients of the ELA group were analyzed retrospectively using radiological and clinical assessments. RESULTS: No significant difference in union time, posterior facet reduction accuracy, subtalar osteoarthritis frequency, Bohler angle, calcaneal width, American Orthopaedic Foot and Ankle Society score, visual analogue scale score, 36-item short form survey, and foot function index was observed between the two groups. The p-value of the average height of the calcaneus correction, average length of calcaneal correction, and average loss of correction length were <0.001, 0.005, and 0.015, respectively. The incidence of complications, including soft tissue necrosis and bone infection, were 23.1% in the ELA group and none in the MIA group. CONCLUSION: The clinical outcomes were similar in the two groups. The degree of reduction of fracture showed a better result in the MIA group than the ELA group. Furthermore, there were no complications in the MIA group, whereas the ELA group showed some complications.

Anatomic classification of the subtalar joint surface and its clinical significance / 解剖学报

Objective To study the anatomical and morphological characteristics of the subtalar joint surface and to explore its clinical significance. Methods Totally 365 dry calcaneus specimens (sex, age unknown) were selected. Its long axis sum and the short axis sum were measured using Vernier caliper. The Gissane's angle (the angle was formed by two lines along the anterior and posterior articular surfaces of calcaneus respectively) and the Bohler's angle (the angular measurement was formed by a line from the posterior calcaneal margin to the margin of the posterior facet and a second line from the margin of the posterior facet to the superior margin of the anterior calcaneal process) were measured using Goniometer. Results According to the anatomical morphology, the subtalar joint surface can be divided into 5 types: type I (189, 51.78%), type II (80, 21.92%), type III (5 1, 13.97%), type IV (37, 10.14%) and type V (8, 2. 19%). The long axis sum of type III (4. 55±0. 6) cm was significantly smaller than other types (P 0. 05). Conclusion In this experiment, there are five variations in the articular surface of calcaneal talus, mainly type I, and its anatomical morphological classification has certain guiding significance for clinical diagnosis and treatment.

Effectiveness analysis of modified tarsal sinus approach for Sanders Ⅱ- Ⅲtype calcaneal fractures / 中国修复重建外科杂志

Objective: To investigate the short-term effectiveness of modified tarsal sinus approach and traditional tarsal sinus approach in the treatment of Sanders Ⅱ-Ⅲ type calcaneal fractures. Methods: Between January 2015 and August 2017, 53 patients with Sanders Ⅱ-Ⅲ type calcaneal fractures were selected and divided into observation group (21 cases, using modified tarsal sinus approach for fracture reduction after exposure of the subtalar joint below the long and short fibular tendon) and control group (32 cases, using traditional tarsal sinus approach) by random number method. There was no significant difference between the two groups in terms of gender, age, side, cause of injury, fracture type, injury to operation time, and preoperative Böhler angle, Gissane angle, visual analogue scale (VAS) core ( P>0.05), which were comparable. The operation time, postoperative drainage volume, postoperative Böhler angle, Gissane angle, and postoperative angle improvement values of the two groups were recorded and compared. VAS score, American Orthopaedic Foot and Ankle Society (AOFAS) score, and short-form 36 health survey scale (SF-36) score were used to evaluate the effectiveness. Results: All the 53 patients successfully completed the operation without serious complications such as vascular and nerve injury and perioperative death. There was no significant difference in operation time and postoperative drainage volume between the two groups ( P>0.05). Patients in both groups were followed up 12-36 months (mean, 17 months). No infection, fracture displacement, failure of internal fixation, and malunion of fracture occurred after operation. None of the patients underwent secondary joint fusion. There was no significant difference in fracture healing time between the two groups ( t=0.30, P=0.77). The postoperative Böhler angle and Gissane angle at 2 days in the two groups were significantly improved when compared with those before operation ( P0.05). VAS scores at 24 hours and 1 year after operation were significantly improved when compared with that before operation in both groups ( P0.05). There was no significant difference in AOFAS scores between the two groups at 1 year after operation ( t=1.46, P=0.15). However, the SF-36 scale score at 1 year after operation was significantly higher than that of the control group ( t=2.08, P=0.04). At last follow-up, 2 patients in the observation group and 8 patients in the control group presented subtalar joint stiffness or pain, and there was no significant difference in the incidence between the two groups ( χ2=1.98, P=0.16). Conclusion: The modified tarsal sinus approach for the treatment of Sanders Ⅱ-Ⅲ type calcaneal fractures has the advantages of minimal invasion, clear reduction under direct vision, reliable reduction and fixation, and low incision complications.

Treatment of postoperative infected unhealed wounds in calcaneus fractures using L-shaped flap pedicled with peroneal artery perforator / 中华整形外科杂志

Objective@#To summarize and explore the clinical effect and application of L-shaped flap pedicled with peroneal artery perforator in the treatment of unhealed lateral L-shaped incision after calcaneal fractures.@*Methods@#From October 2013 to March 2015, 17 patients with unhealed L-shaped incision after calcaneal fractures were treated with one-stage thorough debridement, artificial bone filling with antibiotics-laden calcium sulphate and L-shaped flap pedicled with peroneal artery. Flap areas ranged from 8 cm × 2 cm to 11 cm × 3 cm. Donor sites are primarily sutured.@*Results@#All 17 patients were followed up for 6 to 18 months with an average of 11.5 months. All patients with infection were cured effectively, demonstrating well survived flaps with normal elasticity and pigmentation, no scar contracture, satisfactory appearance and normal ankle joint motility.@*Conclusions@#L-shaped flap pedicled with peroneal artery perforator was an effective method in the treatment of unhealed lateral L-shaped incision after calcaneal fractures. It was suitable for coverage of the unhealed wound and worthy of being popularized.

Study on sustentaculum tali screw placement for constant fragment of calcaneal fracture / 中国修复重建外科杂志

Objective: To investigate the anatomical characters of the sustentaculum tali (ST), accurate entry point and direction for the placement of ST screw from posterior subtalar joint facet to the constant fragment (CF) in calcaneal fractures. Methods: A total of 100 patients with calcaneal fractures performed ankle CT scans were enrolled between January 2016 and April 2016. According to the inclusion criteria, the clinical data of 33 patients were analyzed, including 18 males and 15 females, with a median age of 41.0 years (range, 18-60 years). There were 16 cases on left side and 17 cases on the right side. Three-dimensional (3D) calcaneal model was reconstructed by Mimics 17.0 software, and the ST anatomical references were measured, including the length of upper and lower edge, the length and height of the midline, the horizontal angle between the midline and foot plantar surface. The parameters of the optimal entry point position (P' point) and placement angle of the ST screw were determined. The length of ST screw was also measured. The differences between males and females or left and right sides were compared. Results: The length of upper edge of the ST was (16.60±2.23) mm, lower edge (20.65±2.90) mm, midline (20.56±2.62) mm, and the height of midline was (9.61±1.36) mm. The horizontal angle between the midline and foot plantar surface was (23.43±3.36)°. The vertical distance from P' point to the lowest point of the tarsal sinus was (3.09±1.65) mm, while the horizontal distance was (14.29±2.75) mm. The distance from P' point to the apex of the lateral talus, subchondral bone of subtalar joint, calcaneocuboid joint was (11.41±3.22), (6.59±2.22), (34.58±3.75) mm, respectively. The horizontal angle between the ST screw and foot plantar surface was (-1.17±2.07)°. The anteversion angle of ST screw was (16.18±2.05)° and the length was (41.64 ± 3.09) mm. There were significant differences in the length of upper and lower edge, the length and height of the midline, the distance from P' point to the apex of the lateral talus, subchondral bone of subtalar joint, and calcaneocuboid joint, and the anteversion angle and length of the ST screw between males and females ( P0.05). Conclusion: After appropriate reduction of the calcaneal fractures, the entry point of ST screw was recommended at about 14 mm posterior and about 3 mm upper related to the foot horizontal line through the lowest tarsal sinus point; and the direction of ST screw placement was about 17° anteversion for males and 15° anteversion for females.