Computer-assisted versus non-computer-assisted preoperative planning of corrective osteotomy for extra-articular distal radius malunions: a randomized controlled trial

<p>Abstract</p> <p>Background</p> <p>Malunion is the most common complication of distal radius fracture. It has previously been demonstrated that there is a correlation between the quality of anatomical correction and overall wrist function. However, surgical correction can be difficult because of the often complex anatomy associated with this condition. Computer assisted surgical planning, combined with patient-specific surgical guides, has the potential to improve pre-operative understanding of patient anatomy as well as intra-operative accuracy. For patients with malunion of the distal radius fracture, this technology could significantly improve clinical outcomes that largely depend on the quality of restoration of normal anatomy. Therefore, the objective of this study is to compare patient outcomes after corrective osteotomy for distal radius malunion with and without preoperative computer-assisted planning and peri-operative patient-specific surgical guides.</p> <p>Methods/Design</p> <p>This study is a multi-center randomized controlled trial of conventional planning versus computer-assisted planning for surgical correction of distal radius malunion. Adult patients with extra-articular malunion of the distal radius will be invited to enroll in our study. After providing informed consent, subjects will be randomized to two groups: one group will receive corrective surgery with conventional preoperative planning, while the other will receive corrective surgery with computer-assisted pre-operative planning and peri-operative patient specific surgical guides. In the computer-assisted planning group, a CT scan of the affected forearm as well as the normal, contralateral forearm will be obtained. The images will be used to construct a 3D anatomical model of the defect and patient-specific surgical guides will be manufactured. Outcome will be measured by DASH and PRWE scores, grip strength, radiographic measurements, and patient satisfaction at 3, 6, and 12 months postoperatively.</p> <p>Discussion</p> <p>Computer-assisted surgical planning, combined with patient-specific surgical guides, is a powerful new technology that has the potential to improve the accuracy and consistency of orthopaedic surgery. To date, the role of this technology in upper extremity surgery has not been adequately investigated, and it is unclear whether its use provides any significant clinical benefit over traditional preoperative imaging protocols. Our study will represent the first randomized controlled trial investigating the use of computer assisted surgery in corrective osteotomy for distal radius malunions.</p> <p>Trial registration</p> <p>NCT01193010</p

Outcome of three dimensional osteotomy for cubitus varus deformity

Background: Cubitus varus is the most common angular deformity resulting from supracondylar fracture of the humerus in children and adults. There are several options for correcting this deformity, but three dimensional osteotomy is now a popular method for the operative treatment of cubitus varus deformity. Objective of current study was to evaluate clinical and radiological outcome of three dimensional corrective osteotmy for cubitus varus deformity.Methods: This prospective interventional study was conducted in the department of orthopaedic surgery, BSMMU, Shahbag, Dhaka from January 2016 to September 2020. Within this period, total 40 cases of cubitus varus deformity, age ranging from 8-20 years that has the inclusion criteria was enrolled as a study sample with proper consent. All the data were analyzed statistically by using SPSS-22.Results: The results of present study showed significantly improved carrying angle, range of motion, internal rotation angle at the time of final follow-up period of six months or more. The outcome of the subjects was graded as excellent in 16 (40%), good in 18 (45%), fair in 4 (10%) and poor in 2 (5%) patients. Excellent, good and fair results were considered as satisfactory outcome and only poor result was considered as unsatisfactory outcome.Conclusions: After analyzing the results of present study it can be concluded that three dimensional osteotomy is a safe technique with satisfactory outcome in treatment of cubitus varus deformity

Guided growth: 1933 to the present

While osteotomies are necessary for rotational correction and limb lengthening, angular correction or moderate length inhibition may be achieved by other, less invasive means. Several techniques of epiphysiodesis have evolved, enabling gradual correction of angular correction and/or length equalisation through guided growth. This manuscript comprises a historical and comparative review of those techniques. The 8-plate method of guided growth affords the opportunity to provide a tension band (rather than compression) that expedites angular correction, compared to stapling or transphyseal screws, which rely upon the principle of compression. When applied to each side of a given physis, longitudinal growth is inhibited, in the same fashion as stapling or epiphysiodesis. The physis and periosteum are spared any direct insult, thus making this a reversible process, suitable for use in younger children. The 8-plate is simple to insert and, compared to staples or transphyseal screws, easy to remove

French osteotomy for cubitus varus in children: a long term study over 27 years

Background: Cubitus varus is a cosmetically unacceptable complication of supracondylar fractures of the elbow in children. We have performed the lateral closing wedge (French) osteotomy to correct the varus for 27 years. More complex osteotomies have been described to correct the associated hyperextension and internal rotation deformities and to prevent a prominent lateral condyle. Methods: We retrospectively reviewed 90 consecutive patients (1986-2012). The mean age of the patients at surgery was 8.2 years (3 to14 years). The varus angle (mean 21.4°, range 8°- 40°) was assessed pre-operatively with the humero-elbow-wrist (HEW) angle. The postoperative carrying angle (mean 10.4) and the pre- and postoperative range of movement were assessed clinically. The lateral condylar prominence index (LCPI) was retrospectively measured at union. Results: Seventy five (93.3%) of the patients had a good or excellent result. Six (6.7%) had a poor result (residual varus, loss of >20°of pre-operative range of flexion or extension or a complication necessitating repeat surgery). There were no neuro-vascular complications. The mean LCPI was +0.14. Conclusions: The results of the French osteotomy are comparable to the more technically demanding dome, step-cut translation and multi-planar osteotomies, with a lower complication rate. The literature reports adequate remodelling of the hyperextension deformity ( ≤ 10 years) patient. Level of evidence: Level IV: Case serie

Patellar luxation and concomitant cranial cruciate ligament rupture in dogs – A review

A patellar luxation and concomitant cranial cruciate ligament rupture is a common pathology in dogs. Diagnosis is based on clinical evidence of a patellar luxation and stifle joint instability. However, diagnostic imaging is required to assess the number of skeletal deformities and signs of instability. Surgical options include both soft tissue and osseous techniques, although, in most cases, a combination of multiple procedures is necessary to correct the patellar luxation and restore the stifle joint stability. Complication rates are generally low, but can include reluxation and implant-associated complications. This article describes the patellar luxation and cranial cruciate ligament rupture signs in dogs, including the clinical presentation and diagnosis, and discusses current treatment options

Three-Dimensional Planning and Patient-Specific Instrumentation for the Fixation of Distal Radius Fractures

Background and Objectives: Three-dimensional planning and guided osteotomy utilizing patient-specific instrumentation (PSI) with the contralateral side used as a reference have been proven as effective in the treatment of malunions following complex fractures of the distal radius. However, this approach has not yet been described in relation to fracture reduction of the distal radius. The aim of this study was to assess the technical and logistical feasibility of computer-assisted surgery in a clinical setting using PSI for fracture reduction and fixation. Materials and Methods: Five patients with varied fracture patterns of the distal radius underwent operative treatment with using PSI. The first applied PSI guide allowed specific and accurate placement of Kirschner wires inside the multiple fragments, with subsequent concurrent reduction using a second guide. Results: Planning, printing of the guides, and operations were performed within 5.6 days on average (range of 1-10 days). All patients could be treated within a reasonable period of time, demonstrating good outcomes, and were able to return to work after a follow-up of three months. Mean wrist movements (°) were 58 (standard deviation (SD) 21) in flexion, 62 (SD 15) in extension, 73 (SD 4) in pronation and 74 (SD 10) in supination at a minimum follow-up of 6 months. Conclusions: Three-dimensional planned osteosynthesis using PSI for treatment of distal radius fractures is feasible and facilitates reduction of multiple fracture fragments. However, higher costs must be taken into consideration for this treatment

Three-Dimensional Planning and Patient-Specific Instrumentation for the Fixation of Distal Radius Fractures

Background and Objectives: Three-dimensional planning and guided osteotomy utilizing patient-specific instrumentation (PSI) with the contralateral side used as a reference have been proven as effective in the treatment of malunions following complex fractures of the distal radius. However, this approach has not yet been described in relation to fracture reduction of the distal radius. The aim of this study was to assess the technical and logistical feasibility of computer-assisted surgery in a clinical setting using PSI for fracture reduction and fixation. Materials and Methods: Five patients with varied fracture patterns of the distal radius underwent operative treatment with using PSI. The first applied PSI guide allowed specific and accurate placement of Kirschner wires inside the multiple fragments, with subsequent concurrent reduction using a second guide. Results: Planning, printing of the guides, and operations were performed within 5.6 days on average (range of 1–10 days). All patients could be treated within a reasonable period of time, demonstrating good outcomes, and were able to return to work after a follow-up of three months. Mean wrist movements (°) were 58 (standard deviation (SD) 21) in flexion, 62 (SD 15) in extension, 73 (SD 4) in pronation and 74 (SD 10) in supination at a minimum follow-up of 6 months. Conclusions: Three-dimensional planned osteosynthesis using PSI for treatment of distal radius fractures is feasible and facilitates reduction of multiple fracture fragments. However, higher costs must be taken into consideration for this treatment