Malar Augmentation With Self-drilling Single-Screw Fixation

2000 ◽  
Vol 2 (3) ◽  
pp. 222-225 ◽  
Author(s):  
Neal D. Goldman ◽  
Ramsey Alsarraf ◽  
Gary Nishioka ◽  
Wayne F. Larrabee
Keyword(s):  
Screw Fixation ◽  
Single Screw

Single Versus Dual Headless Compression Screw Fixation of Scaphoid Nonunions: A Biomechanical Comparison

Hand ◽  
2021 ◽  
pp. 155894472097411
Author(s):  
Luke T. Nicholson ◽  
Kristen M. Sochol ◽  
Ali Azad ◽  
Ram Kiran Alluri ◽  
J. Ryan Hill ◽  
...  
Keyword(s):  
Screw Fixation ◽  
Qualitative Assessment ◽  
Secondary Outcome ◽  
Scaphoid Nonunion ◽  
Compression Screw ◽  
Single Screw ◽  
Headless Compression Screw ◽  
Significant Difference ◽  
Load To Failure ◽  
Headless Compression Screws

Background: Management of scaphoid nonunions with bone loss varies substantially. Commonly, internal fixation consists of a single headless compression screw. Recently, some authors have reported on the theoretical benefits of dual-screw fixation. We hypothesized that using 2 headless compression screws would impart improved stiffness over a single-screw construct. Methods: Using a cadaveric model, we compared biomechanical characteristics of a single tapered 3.5- to 3.6-mm headless compression screw with 2 tapered 2.5- to 2.8-mm headless compression screws in a scaphoid waist nonunion model. The primary outcome measurement was construct stiffness. Secondary outcome measurements included load at 1 and 2 mm of displacement, load to failure for each specimen, and qualitative assessment of mode of failure. Results: Stiffness during load to failure was not significantly different between single- and double-screw configurations ( P = .8). Load to failure demonstrated no statistically significant difference between single- and double-screw configurations. Using a qualitative assessment, the double-screw construct maintained rotational stability more than the single-screw construct ( P = .029). Conclusions: Single- and double-screw fixation constructs in a cadaveric scaphoid nonunion model demonstrate similar construct stiffness, load to failure, and load to 1- and 2-mm displacement. Modes of failure may differ between constructs and represent an area for further study. The theoretical benefit of dual-screw fixation should be weighed against the morphologic limitations to placing 2 screws in a scaphoid nonunion.

Comparison of Two Fixation Methods of Oblique Lesser Metatarsal Osteotomies: A Biomechanical Study

1995 ◽  
Vol 16 (7) ◽  
pp. 437-439 ◽  
Author(s):  
Mark P. Slovenkai ◽  
Daniel Linehan ◽  
Linda McGrady ◽  
Tae-Hong Lim ◽  
Gerald F. Harris ◽  
...  
Keyword(s):  
Internal Fixation ◽  
Screw Fixation ◽  
Material Testing ◽  
Biomechanical Study ◽  
Testing System ◽  
Human Cadaver ◽  
Kirschner Wires ◽  
Fixation Methods ◽  
Single Screw ◽  
Fresh Frozen

Two methods of internal fixation of oblique lesser metatarsal osteotomies were compared biomechanically using fresh-frozen human cadaver bones. Osteotomies were made obliquely through the metatarsal shafts and fixed with either crossed Kirschner wires or a single AO screw using the lag technique. The specimens were then fixed at their proximal end and loaded to failure using an axial torsion material testing system (MTS, Minneapolis, MN). Load displacement curves were obtained and the stiffness of the constructs was determined. Single-screw fixation was found to be significantly stiffer than the crossed wire configuration ( P < .01). Single-screw fixation resulted in a stiffness of 211.2 ± 111.7 N/cm (mean ± SD), while stiffness of the crossed wire configuration averaged 56.9 ± 25.1 N/cm.

Single-Screw Fixation for Subtalar Joint Fusion Does Not Increase Nonunion Rate

2010 ◽  
Vol 3 (4) ◽  
pp. 164-166 ◽  
Author(s):  
William T. DeCarbo ◽  
Gregory C. Berlet ◽  
Christopher F. Hyer ◽  
W. Bret Smith
Keyword(s):  
Subtalar Joint ◽  
Screw Fixation ◽  
Single Screw ◽  
Joint Fusion

scholarly journals Compare the Initial Result of One Screw or Two Screws Fixation for Proximal Crescentic Metatarsal Osteotomy with Distal Soft Tissue Reconstruction in Severe Hallux Valgus Treatment

2021 ◽  
Author(s):  
Haijiao Mao ◽  
Linger Wang ◽  
Jiahui Li
Keyword(s):  
Soft Tissue ◽  
Hallux Valgus ◽  
Screw Fixation ◽  
Metatarsal Osteotomy ◽  
Soft Tissue Reconstruction ◽  
Single Screw ◽  
Tissue Reconstruction ◽  
Group 2 ◽  
Severe Hallux Valgus ◽  
Group 1

Abstract Proximal crescentic metatarsal osteotomy and distal soft tissue reconstruction have been introduced to correct severe hallux valgus (HV). The intrinsically unstable proximal first crescentic osteotomy depends on enough force fixation for stability. It is necessary to judge the number of fixation’s screw for osteotomy. Fifty two feet from 50 adult patients with severe HV were included in this study. The treatment was proximal crescentic metatarsal osteotomy with a single screw and distal soft tissue reconstruction in Group 1. The fixation with two screws with distal soft tissue reconstruction in Group 2. Clinical and radiological follow-ups were assessed after 4 and 12 months of operation. In Group 1, hallux valgus angle (HVA) was decreased from 46.4 ±3.28 to 19.9 ±4.70 after 12 months of operation. HVA was decreased from 45.1 ±3.45 to19.1 ±4.70 for group 2. For intermetatarsal angle (IMA) in Group 1, it was changed from 18.5 ±1.98 to 9.25 ±1.11 after 12 months of operation. For group 2, it was decreased from 18.3 ±1.81 to 9.53 ±1.70. Meanwhile, the American Orthopedic Foot and Ankle Society (AOFAS) score was improved from 63.1 to 83.9 after 12 months of operation for group1, and was improved from 64.3 to 82.8 for group2. Furthermore, the visual analogue scale (VAS) score was reduced from 4.5±1.01 to 1.7± 0.43 for group 1, and it was reduced from 4.7±0.92 to 1.7±0.55 for group 2 after 12 months of operation. The first metatarsal dorsal elevation was occurred in 4 feet in Group1, and no metatarsal dorsal elevation was occurred in Group 2. There were no significant differences identified among Group1 and Group 2 in terms of VAS and AOFAS scores, and HVA and IMA measurements. However, there is less complication in two-screw fixation for crescentic osteotomy compared to a single screw fixation.

Proximal Femoral Bone Cyst After Single Screw Fixation for Slipped Capital Femoral Epiphysis

2020 ◽  
Vol 10 (4) ◽  
pp. e20.00408-e20.00408
Author(s):  
Matthew A. Siegel ◽  
Jason Y. Chen ◽  
Maged R. Hanna ◽  
Yasser R. Farid
Keyword(s):  
Screw Fixation ◽  
Bone Cyst ◽  
Slipped Capital Femoral Epiphysis ◽  
Femoral Bone ◽  
Single Screw

Single-screw Fixation of Adolescent Salter-II Proximal Humeral Fractures

2017 ◽  
Vol 37 (6) ◽  
pp. e342-e346
Author(s):  
Mark Carl Miller ◽  
Christopher N. Redman ◽  
R. Justin Mistovich ◽  
Muturi Muriuki ◽  
Mark J. Sangimino
Keyword(s):  
Screw Fixation ◽  
Proximal Humeral Fractures ◽  
Humeral Fractures ◽  
Single Screw

A comparison of union rates and complications between single screw and double screw fixation of sliding calcaneal osteotomy

2019 ◽  
Vol 25 (1) ◽  
pp. 84-89 ◽  
Author(s):  
Bahman SahraNavard ◽  
Parke W. Hudson ◽  
Cesar de Cesar Netto ◽  
Bradley W. Wills ◽  
Ibukunoluwa B. Araoye ◽  
...  
Keyword(s):  
Screw Fixation ◽  
Single Screw ◽  
Calcaneal Osteotomy

scholarly journals P.139 Fixation of Type II Odontoid fractures with anterior single screw

2018 ◽  
Vol 45 (s2) ◽  
pp. S53-S53
Author(s):  
AM Seleem ◽  
NM Sayed
Keyword(s):  
Cervical Spine ◽  
Screw Fixation ◽  
Type Ii ◽  
Union Rate ◽  
Cervical Spine Injuries ◽  
Odontoid Fractures ◽  
Hardware Failure ◽  
Single Screw ◽  
Spine Injuries ◽  
Rotatory Motion

Background: More than 60% of spinal injuries affect the cervical spine,and approximately 20% of all cervical spine injuries involve the axis.The most common axis injury is odontoid fracture.The management of odontoid fractures became less controversial than before. Methods: Thirty consecutive patients(25 males and 5 females)who underwent anterior single screw fixation for recent Type II odontoid fractures at King Fahd Hospital,Al-Madina Al-Munawarah,in Saudi Arabia(SA) between January 2004 and December 2007 were included in this study.Data including clinical examination,imaging studies and operative technique were used to analyze the results of this surgical technique. Results: Single screw for fixation of type II odontoid fracture was found easier and simpler than double screws with the same advantages.This method resulted in immediate spinal stability and preserves normal rotation at C1–2 in all patients.Radiological evidence of bone union achieved in 22 patients(73% of cases);and nonunion in 8 patients(27% of cases).Complications related to surgical procedure and hardware failure were recorded in 4 patients(13% of cases). Conclusions: Direct anterior single screw fixation is an effective,simple,and safe method for treating type II odontoid fractures.It is associated with rapid patient mobilization,minimal postoperative pain,and shorter hospital stay.By this technique,the required anatomical and functional outcome can be obtained through immediate stability of the axis,preserves C1–2 rotatory motion,and achieved high union rate.

Single screw fixation in stable and unstable slipped upper femoral epiphysis

2011 ◽  
Vol 20 (3) ◽  
pp. 147-151 ◽  
Author(s):  
Emma Mulgrew ◽  
Simon Wells-Cole ◽  
Farhan Ali ◽  
Suraj Joshy ◽  
Irfan Siddique ◽  
...  
Keyword(s):  
Screw Fixation ◽  
Single Screw ◽  
Slipped Upper Femoral Epiphysis
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