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Rotational osteotomy

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https://www.readbyqxmd.com/read/28431410/gravity-stress-radiographs-and-the-effect-of-ankle-position-on-deltoid-ligament-integrity-and-medial-clear-space-measurements
#1
Ali Ashraf, Jacob Murphree, Eric Wait, Travis Winston, Adam Wooldridge, Matthew Meriwether, Joshua Wilson, Jerry S Grimes
INTRODUCTION: External rotation and gravity stress radiographs have been described to distinguish stable supination-external rotation-II (SER-II) ankle fractures from unstable SER-IV fractures. It has been previously shown that both external rotation and gravity stress views are equivalent in their ability to diagnose deltoid ligament injury. It has also been shown that the position of the ankle influences the external rotation stress radiograph. However, no data of ankle position exist for gravity stress radiographs...
May 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28419537/electromagnetic-tracking-for-femoral-derotation-osteotomy-an-in-vivo-study
#2
Andreas Geisbüsch, Christoph Auer, Hartmut Dickhaus, Cornelia Putz, Thomas Dreher
Femoral derotation osteotomy delivers good to excellent results in the treatment of rotational gait abnormalities and especially in internal rotation gait. The outcome of the procedure has been evaluated in numerous short and long term studies. Although reasons for recurrence and over-/under-correction have been unveiled in earlier studies the mechanisms are still not fully understood. False intra-operative assessment of the derotation angle may contribute to imprecise outcomes. In a recent saw-bone study we evaluated an electromagnetic tracking system in comparison to conventional goniometer measurement and a CT reference measurement and found it to be extremely accurate, whereas the use of a conventional goniometer for derotation measurement showed a high inter- and intra-rater variability...
April 17, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28405709/-scarf-osteotomy
#3
H-J Trnka, P Bock
Hallux valgus is one of the most common deformities of the lower extremity. Multiple etiologies have been discussed, and various techniques have been described. The SCARF osteotomy is indicated for moderate to severe hallux valgus deformities. The technique historically used by carpenters allows immediate postoperative weight bearing and also entails the possibility to correct the distal metatarsal articular angle by rotation of the osteotomy. The SCARF osteotomy has also been successfully used in revision surgeries...
April 12, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28394871/triplanar-humeral-osteotomy-for-restoration-of-midline-function-in-patients-with-brachial-plexus-birth-palsy
#4
John D Jennings, Dustin A Greenhill, Scott H Kozin, Dan A Zlotolow
Brachial plexus birth palsy resolves spontaneously in a majority of patients, however, others may have serious permanent dysfunction. Although nerve transfers or grafts are early options for treatment, many children have residual deficits or present too late for such procedures. In these patients, rotational osteotomy of the humerus may restore improved function and motion. Unfortunately, traditional humeral osteotomies only provide correction in a single plane, therefore appropriate correction of the typical residual deformity is incomplete...
April 7, 2017: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28392230/changes-in-condylar-position-after-bssro-with-and-without-le-fort-i-osteotomy-via-surgery-first-approach-in-mandibular-prognathism-with-facial-asymmetry
#5
Jiyin Li, Sun-Youl Ryu, Hong-Ju Park, Min-Suk Kook, Seunggon Jung, Jeong Joon Han, Hee-Kyun Oh
OBJECTIVES: This study aimed to evaluate changes in condylar position after bilateral sagittal split ramus osteotomy (BSSRO) with and without Le Fort I osteotomy via the surgery-first approach (SFA) in patients with facial asymmetry. STUDY DESIGN: Eighteen patients (36 condyles) who received surgical-orthodontic treatment using the SFA were included and divided into 2 groups depending on the extent of surgery: BSSRO-only group (n = 12) and BSSRO with Le Fort I osteotomy group (n = 6)...
February 6, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28391764/physiological-positioning-strategy-alters-condylar-position-after-mandibular-ramus-sagittal-split-osteotomies-for-mandibular-prognathism
#6
Seigo Ohba, Hiroya Ozaki, Kei-Ichirou Miura, Takamitsu Koga, Takako Kawasaki, Noriaki Yoshida, Izumi Asahina
OBJECTIVE: The aim of this study was to elucidate the physiological position of the proximal segment for postoperative jaw movement in patients with mandibular prognathism. METHODS: Twenty-two patients with mandibular prognathism were treated by orthognathic surgery using bilateral mandibular sagittal split ramus osteotomies (SSRO) with a physiological positioning strategy. The skeletal stability was assessed, and the movement of the proximal segment was evaluated by cephalography and computed tomography performed preoperatively, immediately postoperatively, and one year postoperatively...
April 8, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/28391077/modified-technique-used-for-sagittal-splitting-of-the-mandible
#7
T Loncle, P Bontemps, M Bénaicha
Sagittal osteotomy of the mandible is the most common orthognathic surgery procedure. The drawbacks of this technique are: nerve disturbance, the common formations of a pre-angular notch after mandibular advancement, and the impossibility of lowering the mandibular angle bicortically. The goal of the described technique is to maintain the basal mandibular edge and the internal valve in one single piece. This split prevents unsightly notches appearing after mandibular advancement and it moves down the mandibular angle during counterclockwise rotation and does not increase the intergonial distance...
April 6, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28390188/prediction-of-normal-bone-anatomy-for-the-planning-of-corrective-osteotomies-of-malunited-forearm-bones-using-a-three-dimensional-statistical-shape-model
#8
Flavien Mauler, Christoph Langguth, Andreas Schweizer, Lazaros Vlachopoulos, Tobias Gass, Marcel Lüthi, Philipp Fürnstahl
Corrective osteotomies of the forearm based on 3D computer simulation using contralateral anatomy as a reconstruction template is an approved method. Limitations are existing considerable differences between left and right forearms, and that a healthy contralateral anatomy is required. We evaluated if a computer model, not relying on the contralateral anatomy, may replace the current method by predicting the pre-traumatic healthy shape. A statistical shape model (SSM) was generated from a set of fifty-nine CT scans of healthy forearms, encoding the normal anatomical variations...
April 8, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28389082/distal-humerus-external-rotation-osteotomy-for-hand-position-in-arthrogryposis
#9
Lindley B Wall, Valeri Calhoun, Summer Roberts, Charles A Goldfarb
PURPOSE: In the amyoplasia type of arthrogryposis, a reverse pronated grasp pattern is often seen. We hypothesized that repositioning the hands, through distal humerus external rotation osteotomies (DHO), would allow for palm-to-palm grasp without arm cross-over and would improve function and parent/patient satisfaction. METHODS: The medical records of all patients treated surgically for arthrogryposis were reviewed at the Shriners Hospital for Children, St. Louis, MO...
April 4, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28382920/surgical-treatment-of-a-proximal-diaphyseal-tibial-deformity-associated-with-partial-caudal-and-cranial-cruciate-ligament-deficiency-and-patella-baja
#10
S Vincenti, S Knell, A Pozzi
Caudal cruciate ligament injury can be a complication following tibial plateau leveling osteotomy (TPLO) (Slocum und Slocum, 1993) especially if the post-operative Tibial Plateau Angle (TPA) is less than 5 degree. We describe a case of negative TPA associated with partial cranial and caudal ligament rupture treated with a center of rotation of angulation (CORA) based cranial tibial opening wedge osteotomy and tibial tuberosity transposition. A 13 kg, mixed breed dog was presented for right pelvic limb lameness...
April 2017: Schweizer Archiv Für Tierheilkunde
https://www.readbyqxmd.com/read/28377262/evaluation-of-malrotation-following-intramedullary-nailing-in-a-femoral-shaft-fracture-model-can-a-3d-c-arm-improve-accuracy
#11
Austin J Ramme, Jonathan Egol, Gregory Chang, Roy I Davidovitch, Sanjit Konda
INTRODUCTION: Difficulty determining anatomic rotation following intramedullary (IM) nailing of the femur continues to be problematic for surgeons. Clinical exam and fluoroscopic imaging of the hip and knee have been used to estimate femoral version, but are inaccurate. We hypothesize that 3D c-arm imaging can be used to accurately measure femoral version following IM nailing of femur fractures to prevent rotational malreduction. METHODS: A midshaft osteotomy was created in a femur Sawbone to simulate a transverse diaphyseal fracture...
March 31, 2017: Injury
https://www.readbyqxmd.com/read/28365906/error-range-in-proximal-femoral-osteotomy-using-computer-tomography-based-navigation
#12
Masaki Takao, Takashi Sakai, Hidetoshi Hamada, Nobuhiko Sugano
PURPOSE  : The purpose of this preliminary study was to determine the error range compared with preoperative plans in proximal femoral osteotomy conducted using a computed tomography (CT)-based navigation system. METHODS  : Four patients (four hips) underwent transtrochanteric rotational osteotomy (TRO), and three patients (four hips) underwent curved varus osteotomy (CVO) using CT-based navigation. Volume registration of pre- and postoperative CT was performed for error assessment. RESULTS  : In TRO, the mean osteotomy angle error was [Formula: see text] (range [Formula: see text]) in the valgus direction and [Formula: see text] (range [Formula: see text]) in the retroversion direction...
April 1, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28365716/displacement-patterns-of-the-maxilla-during-parallel-and-rotational-setback-movements-a-finite-element-analysis
#13
Oğuz Buhara, Erkan Erkmen, Kaan Orhan
BACKGROUND The purpose of this analysis was to evaluate the displacement patterns of the maxilla under parallel and rotational setbacks using the finite element method (FEM). MATERIAL AND METHODS A three-dimensional (3D) finite element model of a hemimaxilla was constructed. Through a conventional Le Fort I osteotomy, 2 and 3 mm of posterior movement in a parallel and rotational manner were simulated and the displacement pattern of the maxilla in each movement type was evaluated. RESULTS Both parallel and rotational setbacks resulted in lateral and inferior displacement of the maxillary segment...
April 2, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28350557/double-versus-single-tendon-transfers-to-improve-shoulder-function-in-brachial-plexus-birth-palsy
#14
Dustin A Greenhill, William R Smith, F V Ramsey, Scott H Kozin, Dan A Zlotolow
BACKGROUND: In children with brachial plexus birth palsy (BPBP) undergoing tendon transfers to augment shoulder external rotation, it is unclear whether transfer of the latissimus dorsi with its combined latissimus dorsi and teres major (cLT) versus isolated teres major (iTM) tendon transfer yield different outcomes. METHODS: Records of patients with BPBP who underwent shoulder tendon transfers to augment external rotation were retrospectively reviewed. Transfer type (cLT or iTM) was considered indiscriminate by virtue of surgeon preference...
March 27, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28331961/-corrective-osteotomies-for-posttraumatic-elbow-deformities
#15
J Nowotny, F Thielemann, A Biewener, K D Schaser
OBJECTIVES: Correcion of elbow joint deformities that usually develop secondary to direct or indirect trauma of the arm or elbow with subsequent inadequate healing and consecutive axial/rotational malalignment and may be associated with cosmetic or functional deficits of the arm. INDICATIONS: Relevant malalignment of the arm axis with corresponding cosmetic or functional deficits for the patient. CONTRAINDICATIONS: Pre-existing degenerative and chronic inflammatory changes...
March 22, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28331928/computed-tomographic-evaluation-of-femoral-and-tibial-conformation-in-english-staffordshire-bull-terriers-with-and-without-congenital-medial-patellar-luxation
#16
Mark Newman, Katja Voss
OBJECTIVE: To compare hindlimb conformation of English Staffordshire Bull Terriers with and without medial patellar luxation using computed tomography. METHODS: Hindlimb computed tomography (CT) was performed on six English Staffordshire Bull Terriers with grade II or III medial patellar luxation, and six without medial patellar luxation. Inclination angle, femoral condyle trochanteric angle, anteversion angle (AA), distal anteversion angle (DAA), proximal anteversion angle (PAA), femoral varus angle (FVA), tibial valgus angle (TVA), and tibial torsion angle (TTA) were measured...
March 23, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28322290/3d-printed-navigation-template-in-proximal-femoral-osteotomy-for-older-children-with-developmental-dysplasia-of-the-hip
#17
Pengfei Zheng, Peng Xu, Qingqiang Yao, Kai Tang, Yue Lou
To explore the feasibility of 3D-printed navigation template in proximal femoral varus rotation and shortening osteotomy for older children with developmental dysplasia of the hip (DDH). Between June 2014 and May 2015, navigation templates were designed and used for 12 DDH patients. Surgical information and outcomes were compared to 13 patients undergoing the same surgery but without navigation template. In template-guided patient group, operation time (21.08 min vs. 46.92 min), number of X-ray exposures (3...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28318915/computer-assisted-positioning-of-the-proximal-segment-after-sagittal-split-osteotomy-of-the-mandible-preclinical-investigation-of-a-novel-electromagnetic-navigation-system
#18
Igor Nova, Sebastian Kallus, Moritz Berger, Oliver Ristow, Urs Eisenmann, Christian Freudlsperger, Jürgen Hoffmann, Hartmut Dickhaus
INTRODUCTION: Modifications of the temporomandibular joint position after mandible osteotomy are reluctantly accepted in orthognathic surgery. To tackle this problem, we developed a new navigation system using miniaturized electromagnetic sensors. Our imageless navigation approach is therefore optimized to avoid complications of previously proposed optical approaches such as the interference with established surgical procedures and the line of sight problem. MATERIAL AND METHODS: High oblique sagittal split osteotomies were performed on 6 plastic skull mandibles in a laboratory under conditions comparable to the operating theatre...
February 17, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28286430/rotational-osteotomy-for-hallux-valgus-a-new-technique-for-primary-and-revision-cases
#19
Pablo Wagner, Cristian Ortiz, Emilio Wagner
More than 200 different surgical techniques exist for hallux valgus (HV). Some of them are designed for mild, moderate, or severe deformities depending on their correction power. Nevertheless, they all correct only the coronal and/or sagittal plane deformity. Just a handful of them correct the known axial malrotation that exists in most HV cases. This malrotation is one possible factor that could be the source of recurrence of an operated HV as it has been described. We describe a new technique which simultaneously corrects the metatarsal internal rotation and varus deformity by rotating the metatarsal through an oblique plane osteotomy...
March 2017: Techniques in Foot & Ankle Surgery
https://www.readbyqxmd.com/read/28280706/comparative-study-of-postoperative-stability-between-conventional-orthognathic-surgery-and-a-surgery-first-orthognathic-approach-after-bilateral-sagittal-split-ramus-osteotomy-for-skeletal-class-iii-correction
#20
Deuk-Hyun Mah, Su-Gwan Kim, Ji-Su Oh, Jae-Seek You, Seo-Yun Jung, Won-Gi Kim, Kyung-Hwan Yu
OBJECTIVES: The purpose of this study is to compare the postoperative stability of conventional orthognathic surgery to a surgery-first orthognathic approach after bilateral sagittal split ramus osteotomy (BSSRO). MATERIALS AND METHODS: The study included 20 patients who underwent BSSRO for skeletal class III conventional orthognathic surgery and 20 patients who underwent a surgery-first orthognathic approach. Serial lateral cephalograms were analyzed to identify skeletal changes before surgery (T0), immediately after surgery (T1), and after surgery (T2, after 1 year or at debonding)...
February 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
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