Comparison of osseous change with wire osteosynthesis or rigid fixation in genioplasty

SummaryFractures of the zygomaticomaxillary complex are the second most common of all facial fractures. Several fixation methods have been used over the years, including wire osteosynthesis, lag screw fixation, transfacial Kirschner wire fixation, titanium plate and screw fixation, and more recently, resorbable plating system. Internal fixation with titanium plates and screw provides the most rigid fixation and thus greater immobility of the fracture segments. The degree of immobilization created with titanium plates and screws also allows fixation at fewer anatomic points.

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Comparative stability study of wire osteosynthesis versus rigid fixation in the treatment of Class III dentoskeletal deformities

American Journal of Orthodontics and Dentofacial Orthopedics ◽

10.1016/s0889-5406(94)70008-7 ◽

1994 ◽

Vol 105 (5) ◽

pp. 477-482 ◽

Cited By ~ 3

Author(s):

Alessandro Silvestri ◽

Maurizio Ciaramelletti ◽

Giorgio Natali

Keyword(s):

Stability Study ◽

Rigid Fixation ◽

Class Iii ◽

Comparative Stability ◽

Wire Osteosynthesis

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Rigid Fixation and Osteotomy Design in Frontal Orbital Advancement Osteotomies

Clinics in Plastic Surgery ◽

10.1016/s0094-1298(20)31381-x ◽

1989 ◽

Vol 16 (1) ◽

pp. 205-211 ◽

Cited By ~ 1

Author(s):

Antonio Fuente Del Campo

Keyword(s):

Rigid Fixation

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Treatment of Delayed Union and Septic Osteomyelitis of Metacarpus III/IV in a Calf Using Gentamicin-impregnated Collagen Sponges and Minimal External Coaptation

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.1055/s-0038-1632603 ◽

1998 ◽

Vol 11 (01) ◽

pp. 19-22 ◽

Cited By ~ 1

Author(s):

A. Steiner ◽

Gaby Hirsbrunner

Keyword(s):

Standard Treatment ◽

Delayed Union ◽

Surgical Debridement ◽

Rigid Fixation ◽

Skin Defect ◽

Long Time ◽

Metaphyseal Fracture ◽

External Stabilization ◽

Long Acting ◽

Local Antibiotic

SummaryA newborn calf was admitted for evaluation of a primarily closed comminuted metaphyseal fracture of metacarpus III/IV. Closed reduction and application of transfixation pins and a fibreglass cast were performed. Ten days after pin removal, radiographs revealed that the initially healed fracture had collapsed, and osteomyelitis was diagnosed. Bacteriological culture from the deep draining tract yielded Actinomyces pyogenes and Staphylococcus aureus. Standard treatment of delayed union or nonunion caused by septic osteomyelitis consists of surgical debridement, rigid fixation, and long-time administration of antibiotics. In this case, we used surgical debridement, administration of a new long-acting local antibiotic (gentamicin- impregnated collagen sponges), and minimal external stabilization. At day 27 after initiation of this treatment, the skin defect had healed, and the fracture was stable on manual palpation.Standard treatment of delayed union or nonunion caused by septic osteomyelitis consists of surgical debridement, rigid fixation and prolonged administration of antibiotics. In the case described, we used surgical debridement, administration of a long-acting local antibiotic (gentamicin-impregnated collagen sponges), and minimal external stabilization. The promising outcome of this case and the good results in human surgery warrant further investigation in the use of gentamicin-impregnated collagen sponges in veterinary orthopaedics.

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Connection of discontinuous segments in early functional recovery from thoracic ossification of the posterior longitudinal ligament treated with posterior instrumented surgery

Journal of Neurosurgery Spine ◽

10.3171/2019.8.spine19604 ◽

2020 ◽

Vol 32 (2) ◽

pp. 200-206

Author(s):

Kei Ando ◽

Kazuyoshi Kobayashi ◽

Masaaki Machino ◽

Kyotaro Ota ◽

Satoshi Tanaka ◽

...

Keyword(s):

Early Stage ◽

Morphological Changes ◽

Japanese Orthopaedic Association ◽

Multislice Ct ◽

Posterior Longitudinal Ligament ◽

Ct Images ◽

Rigid Fixation ◽

Disc Space ◽

Fusion Surgery ◽

Estimated Blood Loss

OBJECTIVEThe objective of this study was to investigate the relationship between morphological changes in thoracic ossification of the posterior longitudinal ligament (T-OPLL) and postoperative neurological recovery after thoracic posterior fusion surgery. Changes of OPLL morphology and postoperative recovery in cases with T-OPLL have not been examined.METHODSIn this prospective study, the authors evaluated data from 44 patients (23 male and 21 female) who underwent posterior decompression and fusion surgery with instrumentation for the treatment of T-OPLL at our hospital. The patients’ mean age at surgery was 50.7 years (range 38–68 years). The minimum duration of follow-up was 2 years. The location of thoracic ossification of the ligamentum flavum (T-OLF), T-OLF at the OPLL level, OPLL morphology, fusion range, estimated blood loss, operative time, pre- and postoperative Japanese Orthopaedic Association (JOA) scores, and JOA recovery rate were investigated. Reconstructed sagittal multislice CT images were obtained before and at 3 and 6 months and 1 and 2 years after surgery. The basic fusion area was 3 vertebrae above and below the OPLL lesion. All parameters were compared between patients with and without continuity across the disc space at the OPLL at 3 and 6 months after surgery.RESULTSThe preoperative morphology of OPLL was discontinuous across the disc space between the rostral and caudal ossification regions on sagittal CT images in all but one of the patients. Postoperatively, these segments became continuous in 42 patients (97.7%; occurring by 6.6 months on average) without progression of OPLL thickness. Patients with continuity at 3 months had significantly lower rates of diabetes mellitus (p < 0.05) and motor palsy in the lower extremities (p < 0.01). The group with continuity also had significantly higher mean postoperative JOA scores at 3 (p < 0.01) and 6 (p < 0.05) months and mean JOA recovery rates at 3 and 6 months (both p < 0.01) after surgery.CONCLUSIONSPreoperatively, discontinuity of rostral and caudal ossified lesions was found on CT in all patients but one of this group of 44 patients who needed surgery for T-OPLL. Rigid fixation with instrumentation may have allowed these segments to connect at the OPLL. Such OPLL continuity at an early stage after surgery may accelerate spinal cord recovery.

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Maximizing Heat Transfer Through Joint Fin Systems

Journal of Heat Transfer ◽

10.1115/1.2137764 ◽

2005 ◽

Vol 128 (2) ◽

pp. 203-206 ◽

Cited By ~ 7

Author(s):

A.-R. A. Khaled

Keyword(s):

Heat Transfer ◽

Thermal Conductivity ◽

Thermal Performance ◽

Critical Length ◽

The Other ◽

Rigid Fixation ◽

Convection Coefficient ◽

Heat Transfer Characteristics ◽

Cold Side ◽

Transfer Characteristics

Heat transfer through joint fins is modeled and analyzed analytically in this work. The terminology “joint fin systems” is used to refer to extending surfaces that are exposed to two different convective media from its both ends. It is found that heat transfer through joint fins is maximized at certain critical lengths of each portion (the receiver fin portion which faces the hot side and the sender fin portion that faces the cold side of the convective media). The critical length of each portion of joint fins is increased as the convection coefficient of the other fin portion increases. At a certain value of the thermal conductivity of the sender fin portion, the critical length for the receiver fin portion may be reduced while heat transfer is maximized. This value depends on the convection coefficient for both fin portions. Thermal performance of joint fins is increased as both thermal conductivity of the sender fin portion or its convection coefficient increases. This work shows that the design of machine components such as bolts, screws, and others can be improved to achieve favorable heat transfer characteristics in addition to its main functions such as rigid fixation properties.

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