scholarly journals Extension Mechanism of the Proximal Interphalangeal Joint of the Human Phalanx: A Cadaveric Biomechanical Study

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Junho Park ◽  
Chang-Hun Lee ◽  
Youngjin Choi ◽  
Il-Han Joo ◽  
Kwang-Hyun Lee ◽  
...  
Keyword(s):  
Joint Angle ◽  
Proximal Interphalangeal Joint ◽  
Biomechanical Study ◽  
Regression Analyses ◽  
Absolute Value ◽  
Extension Mechanism ◽  
Fresh Cadaver ◽  
Pip Joint ◽  
Joint Flexion ◽  
The Mean

Our purpose was to compare the contributions of these two systems to assess PIP joint extension in fresh cadaver models. Nine middle fingers of fresh cadavers were used. The PIP joint angle was measured while an extension load was applied on the extensor tendons. Specimens on which extension load was applied on the extrinsic extensors were classified as the extrinsic group, and those on which extension load was applied on the intrinsic extensors were classified as the intrinsic group. Linear regression analyses were performed to obtain regression equation and the extension load-PIP joint angle curve. The mean of slope of the curve was compared between the two groups using paired t-test. The same experiments were done for the metacarpophalangeal (MP) joint in 0° and 60° flexion to evaluate the effect of MP joint flexion on PIP joint extension. The mean slope of the extension load-PIP joint angle curve of the extrinsic group was significantly greater than that of the intrinsic group. With the MP joint in 0° flexion, the mean slope of the extrinsic and intrinsic groups was -0.148 and -0.117, respectively (greater absolute value means greater slope, p=0.01). With the MP joint in 60° flexion, the mean slopes were -0.147 and -0.104, respectively (p=0.015). The contribution of the intrinsic extensor for PIP joint extension shows decreasing trends with MP joint flexion. The extrinsic extensors have greater contribution for PIP joint extension compared with the intrinsic extensors.

scholarly journals Tethering the Extensor Apparatus Limits PIP Flexion Following K-wire Placement for Pinning Extra-articular Fractures at the Base of the Proximal Phalanx

Hand ◽  
2016 ◽  
Vol 11 (4) ◽  
pp. 433-437 ◽  
Author(s):  
Yaron Sela ◽  
Caitlin Peterson ◽  
Mark E. Baratz
Keyword(s):  
Insertion Site ◽  
Proximal Phalanx ◽  
Extensor Tendon ◽  
Metacarpophalangeal Joint ◽  
Minimally Invasive Surgical ◽  
Articular Fractures ◽  
Pip Joint ◽  
Joint Flexion ◽  
The Mean ◽  
K Wires

Background: Closed reduction with percutaneous Kirschner wires (K-wires) is the most minimally invasive surgical option for stabilizing phalanx fractures. This study examines the effect of K-wire placement on proximal interphalangeal (PIP) joint motion. Methods: PIP joint flexion was measured in the digits of 4 fresh-frozen cadaver hands after placing a suture loop through the flexor tendons and placing tension on the flexors via a mechanical scale. The load necessary to flex the PIP joint to 90° or to maximum flexion was recorded. The load was removed and K-wires were inserted in 3 locations about the metacarpophalangeal joint (MPJ): through the extensor tendon and across the MPJ, adjacent to the extensor tendon insertion site and across the MPJ, and through the sagittal band and into the base of the proximal phalanx (P1). The load on the tendons was reapplied, and angles of PIP joint flexion were recorded for each of the 3 conditions. Results: The mean angle of PIP joint flexion prior to K-wire insertion was 87°, and the mean load applied was 241 g. The angles of flexion were 53° when the K-wire was placed through the extensor tendon, 70° when the K-wire was placed adjacent to the tendon, and 75° when the K-wire was placed into the base of P1 by going through the sagittal band, midway between the volar plate and the extensor tendon. Conclusions: K-wires placed remote from the extensor tendon create less of an immediate tether to PIP joint flexion than those placed through or adjacent to the extensor tendon.

Anterior Tenoarthrolysis for Severe Flexion Contracture of the Fingers (The “Tata” Operation): A Review of 50 Cases

2007 ◽  
Vol 32 (2) ◽  
pp. 224-229 ◽  
Author(s):  
P. LOREA ◽  
J. MEDINA HENRIQUEZ ◽  
R. NAVARRO ◽  
P. LEGAILLARD ◽  
G. FOUCHER
Keyword(s):  
Flexion Contracture ◽  
Salvage Procedure ◽  
Extension Deficit ◽  
Salvage Operation ◽  
Active Range Of Motion ◽  
Pip Joint ◽  
Distal Interphalangeal ◽  
Joint Flexion ◽  
The Mean

The “hook finger”, with both proximal interphalangeal (PIP) and distal interphalangeal (DIP) joint flexion contractures, often after multiple previous operations, is difficult to treat. This paper reports the results of 50 fingers in 49 patients in which the TATA (Téno-Arthrolyse Totale Antérieure) salvage procedure, described by Saffar in 1978, was carried out. Thirty-seven of 50 (74%) of these fingers had had at least one previous operation, most on the flexor apparatus. The mean PIP and DIP extension deficit pre-operatively was 133° with a mean PIP lag of extension of 83°. With a mean follow-up of 7.8 years, 45 fingers were improved, five were not and none was worsened. The mean PIP and DIP extension deficit postoperatively was 47°, with a mean PIP lack of extension of 31°. The overall gain in extension deficit of both joints was 86° and of the PIP was 52°. One PIP joint developed septic arthritis immediately after surgery. The benefit of this salvage operation is mainly in the change of the active range of motion to a more functional arc.

The Relationship Between Hemihamate Graft Size and Proximal Interphalangeal Joint Flexion for Reconstruction of Fracture-Dislocations: A Biomechanical Study

2019 ◽  
Vol 44 (8) ◽  
pp. 696.e1-696.e6
Author(s):  
River M. Elliott ◽  
Suresh K. Nayar ◽  
Aviram M. Giladi ◽  
Christopher L. Forthman ◽  
Brent G. Parks ◽  
...  
Keyword(s):  
Proximal Interphalangeal Joint ◽  
Biomechanical Study ◽  
Interphalangeal Joint ◽  
Graft Size ◽  
Fracture Dislocations ◽  
Joint Flexion ◽  
The Relationship

Reconstruction of Fingertip Defects with the Neurovascular Tranquilli-Leali Flap

2006 ◽  
Vol 31 (3) ◽  
pp. 280-284 ◽  
Author(s):  
P. LORÉA ◽  
N. CHAHIDI ◽  
S. MARCHESI ◽  
R. EZZEDINE ◽  
F. MARIN BRAUN ◽  
...  
Keyword(s):  
Anatomical Study ◽  
Clinical Results ◽  
Cadaver Study ◽  
Advancement Flap ◽  
Proximal Interphalangeal Joint ◽  
Dorsal Skin ◽  
Fresh Cadaver ◽  
Advancement Flaps ◽  
The Mean ◽  
Flexion Crease

For many years, bipedicled palmar advancement flaps were used rarely in fingers because they sacrificed the dorsal branches of the digital arteries, risking dorsal skin necrosis. In 1995, a short bipedicled neurovascular VY advancement flap raised distally to the PIP flexion crease, which spared the dorsal blood supply, was described by Elliot et al. (1995) . This paper includes an anatomical study on 28 fresh cadaver fingers to evaluate the advancement potential of this flap. It also reviews 22 fingertip reconstructions in 22 patients using this flap. The mean advancement of the flap in the cadaver study was 14 (range 10–16) mm. This procedure gave good clinical results in respect of healing, sensibility, bone cover and appearance. Complications occurred in four fingers (18%), viz. two infections, one neuroma and one stiff proximal interphalangeal joint. Our study suggests that this flap can be used to treat fingertip defects of a size of approximately half of the pulp of the distal phalangeal segment of the finger.

scholarly journals Ligamentoplasty with interposition of the proximal interphalangeal joint in the treatment of unicondylar osteochondral defects: a cadaveric feasibility study

2021 ◽  
Vol 48 (6) ◽  
pp. 635-640
Author(s):  
Jean-Charles Hery ◽  
Baptiste Picart ◽  
Mélanie Malherbe ◽  
Christophe Hulet ◽  
Aude Lombard
Keyword(s):  
Feasibility Study ◽  
Proximal Phalanx ◽  
Clinical Results ◽  
Proximal Interphalangeal Joint ◽  
Osteochondral Defects ◽  
Joint Stability ◽  
Significant Difference ◽  
Pip Joint ◽  
The Mean ◽  
A New Technique

Background Injuries to the proximal interphalangeal (PIP) joint are common and complex. However, the treatment of osteochondral defects of the head of the proximal phalanx has rarely been described. Herein, we propose a new technique for the management of unicondylar defects of the proximal phalanx that can restore joint amplitudes and provide PIP stability.Methods In this cadaveric feasibility study, unicondylar defects were generated using striking wedges and chisels. First, a transverse tunnel measuring 2 mm in diameter passing through the head of the proximal phalanx was made. A second tunnel at the base of the middle phalanx with the same diameter was then created. The hemitendon of the flexor carpi radialis graft was passed through each of these tunnels. The proximal end of the graft was interposed in the area with a loss of bone substance. The ligamentoplasty was then tensed and fixed by two anchors on the proximal phalanx. Joint amplitudes and frontal stability were measured preoperatively and postoperatively.Results There was no significant change in the joint’s range of motion: preoperatively, the mean mobility arcs were –2° to 113.80°, and they were –2° to 110° after the procedure (P=0.999). There was no significant difference in joint stability (P>0.05).Conclusions Ligamentoplasty with PIP interposition appears to be a possible solution for the management of unicondylar defects of the proximal phalanx. An evaluation of clinical results is planned in order to definitively confirm the validity of this procedure.

Review of Proximal Interphalangeal Joint Excisional Arthroplasty for the Correction of Second Hammer Toe Deformity in 100 Cases

2005 ◽  
Vol 26 (4) ◽  
pp. 320-325 ◽  
Author(s):  
Claire O'Kane ◽  
Timothy Kilmartin
Keyword(s):  
Rating Scale ◽  
Outpatient Surgery ◽  
Proximal Interphalangeal Joint ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Clinical Rating ◽  
Pip Joint ◽  
The Mean ◽  
Final Followup ◽  
Clinical Rating Scale

Background: The main bony procedures used in the treatment of second hammertoe are excisional arthroplasty and arthrodesis of the proximal interphalangeal (PIP) joint. While a number of studies have reported the outcomes after PIP joint arthrodesis, there are few reports of the outcome of excisional arthroplasty of the PIP joint for the correction of second hammertoes. The purpose of this study was to evaluate the long-term outcome of PIP joint excisional arthroplasty. Methods: Seventy-five patients (100 toes) who had excisional arthroplasty of the PIP joint for the correction of second hammertoe were reviewed at an average followup of 44 months. All patients were seen in clinic and were physically examined to assess the alignment and function of each digit. The radiographs were evaluated preoperatively. The AOFAS clinical rating scale was used preoperatively and at final followup. Patients were asked to rate their satisfaction on a scale of 0 to 10 and were asked if they would be happy to have the surgery under similar circumstances again. Results: The mean preoperative AOFAS clinical rating scale was 46. At final followup this increased to 94, showing an average improvement of 48 points ( p < 0.0001). The mean satisfaction on a scale of 0 to 10 (with 0 equaling complete dissatisfaction and 10 complete satisfaction) was 9.3 (SD 1.3). One patient would not have been happy to undergo outpatient surgery again, because of a change in her social circumstances. Conclusion: In a group of 75 patients who had PIP joint arthroplasty for the correction of second hammertoe, high levels of satisfaction were achieved. No serious complications were encountered, and revision surgery was required in just two cases. Floating toe was the most common complication encountered, and although this did decrease the level of patient satisfaction in seven patients it was not a cause of footwear irritation or pain in any patient.

Percutaneous A1 Pulley Release Combined with Finger Splint for Trigger Finger with Proximal Interphalangeal Joint Flexion Contracture

2019 ◽  
Vol 24 (03) ◽  
pp. 270-275
Author(s):  
Tzu-Cheng Yang ◽  
Duretti Fufa ◽  
Hui-Kuang Huang ◽  
Yi-Chao Huang ◽  
Ming-Chau Chang ◽  
...  
Keyword(s):  
Flexion Contracture ◽  
Proximal Interphalangeal Joint ◽  
Interphalangeal Joint ◽  
Trigger Finger ◽  
Group I ◽  
Percutaneous Release ◽  
Pip Joint ◽  
Joint Flexion ◽  
Group Ii ◽  
A1 Pulley

Background: Long-standing trigger finger can lead to proximal interphalangeal (PIP) joint flexion contracture. In the present study, we present the clinical outcome of percutaneous release with finger splinting for trigger finger with PIP joint flexion contracture prospectively. Methods: We compared outcomes in patients with trigger fingers combined with proximal interphalangeal joint flexion contracture treated by percutaneous release therapy regimen alone (group I) or percutaneous trigger finger release combined with finger splint (group II) during January 2011 and May 2016 with 6 months follow up. Results: Sixty-five patients were randomly allocated to group I (35 patients) or group II (30 patients). Symptoms of locking sensation and pain over the A1 pulley were improved in all patients. The patients in group II showed significantly greater improvements in the flexion contracture angles of proximal interphalangeal joint at post-operative 3 months later (group I, 9.4° ± 4.1°; group II, 27.8° ± 4.6°) and at 6 months later (group I, 15.1° ± 5.2°; group II, 35.7° ± 5.3°) relative to group I. In group II, 25 fingers achieved near full extension (< 10° contracture) after 6 months. Conclusions: Percutaneous release combined with finger splint is regarded as a useful therapy to speed recovery of trigger finger with proximal interphalangeal joint flexion contracture.

Radioulnar interphalangeal joint angles in children and adolescents aged 0 to 19 years

2021 ◽  
pp. 175319342098612
Author(s):  
Sebastian Tschauner ◽  
Eszter Nagy ◽  
Dominik Hirling ◽  
Sara Fahmy ◽  
Petar Vasilev ◽  
...  
Keyword(s):  
Joint Angle ◽  
Proximal Interphalangeal Joint ◽  
Interphalangeal Joint ◽  
Joint Angles ◽  
Distal Interphalangeal Joint ◽  
Ulnar Deviation ◽  
Radial Deviation ◽  
Normal Ranges ◽  
Distal Interphalangeal ◽  
The Mean

The purpose of this study is to determine the normal ranges of radioulnar (i.e. medial-lateral) finger deviations during growth. We retrospectively measured radioulnar interphalangeal joint angles in 6236 properly aligned thumbs and fingers in trauma radiographs of 4720 patients aged 0 to 19 years. The mean interphalangeal joint angle of the thumb was 0.2° (standard deviation 1.5°). The average proximal interphalangeal joint angles were ulnar deviation of 2.5° (1.7°) for the index, ulnar deviation 1.7° (1.5°) for the middle, radial deviation 1.3° (1.8°) for the ring, radial deviation 2.0° (2.8°) for the little fingers. The distal interphalangeal joint angles were ulnar deviation of 2.5° (1.7°), ulnar deviation 2.1° (1.7°), radial deviation 2.1° (1.7°), radial deviation 5.1° (2.8°) from index to the little fingers. Thumbs were typically straight, whereas the index and middle fingers deviated ulnarly, and ring and little fingers radially. There were no relevant differences in sex or laterality.

Relation of Statistically Significant, Abnormal, and Typical WAIS-R VIQ-PIQ Discrepancies to Full Scale IQs

2000 ◽  
Vol 16 (2) ◽  
pp. 107-114 ◽  
Author(s):  
Louis M. Hsu ◽  
Judy Hayman ◽  
Judith Koch ◽  
Debbie Mandell
Keyword(s):  
Graphical Method ◽  
The United States ◽  
Full Scale ◽  
True Score ◽  
Absolute Value ◽  
Normative Population ◽  
The Us ◽  
The Mean ◽  
And Performance ◽  
Quadratic Models

Summary: In the United States' normative population for the WAIS-R, differences (Ds) between persons' verbal and performance IQs (VIQs and PIQs) tend to increase with an increase in full scale IQs (FSIQs). This suggests that norm-referenced interpretations of Ds should take FSIQs into account. Two new graphs are presented to facilitate this type of interpretation. One of these graphs estimates the mean of absolute values of D (called typical D) at each FSIQ level of the US normative population. The other graph estimates the absolute value of D that is exceeded only 5% of the time (called abnormal D) at each FSIQ level of this population. A graph for the identification of conventional “statistically significant Ds” (also called “reliable Ds”) is also presented. A reliable D is defined in the context of classical true score theory as an absolute D that is unlikely (p < .05) to be exceeded by a person whose true VIQ and PIQ are equal. As conventionally defined reliable Ds do not depend on the FSIQ. The graphs of typical and abnormal Ds are based on quadratic models of the relation of sizes of Ds to FSIQs. These models are generalizations of models described in Hsu (1996) . The new graphical method of identifying Abnormal Ds is compared to the conventional Payne-Jones method of identifying these Ds. Implications of the three juxtaposed graphs for the interpretation of VIQ-PIQ differences are discussed.

scholarly journals Interference Screw Versus Suture Anchors for Femoral Fixation in Medial Patellofemoral Ligament Reconstruction: A Biomechanical Study

2021 ◽  
Vol 9 (3) ◽  
pp. 232596712198928
Author(s):  
Heath P. Gould ◽  
Nicholas R. Delaney ◽  
Brent G. Parks ◽  
Roshan T. Melvani ◽  
Richard Y. Hinton
Keyword(s):  
Medial Patellofemoral Ligament ◽  
Interference Screw ◽  
Biomechanical Study ◽  
Graft Fixation ◽  
Mpfl Reconstruction ◽  
Suture Anchors ◽  
Femoral Fixation ◽  
Significant Difference ◽  
Load To Failure ◽  
The Mean

Background: Femoral-sided graft fixation in medial patellofemoral ligament (MPFL) reconstruction is commonly performed using an interference screw (IS). However, the IS method is associated with several clinical disadvantages that may be ameliorated by the use of suture anchors (SAs) for femoral fixation. Purpose: To compare the load to failure and stiffness of SAs versus an IS for the femoral fixation of a semitendinosus autograft in MPFL reconstruction. Study Design: Controlled laboratory study. Methods: Based on a priori power analysis, a total of 6 matched pairs of cadaveric knees were included. Specimens in each pair were randomly assigned to receive either SA or IS fixation. After an appropriate reconstruction procedure, the looped end of the MPFL graft was pulled laterally at a rate of 6 mm/s until construct failure. The best-fit slope of the load-displacement curve was then used to calculate the stiffness (N/mm) in a post hoc fashion. A paired t test was used to compare the mean load to failure and the mean stiffness between groups. Results: No significant difference in load to failure was observed between the IS and the SA fixation groups (294.0 ± 61.1 vs 250.0 ± 55.9; P = .352), although the mean stiffness was significantly higher in IS specimens (34.5 ± 9.6 vs 14.7 ± 1.2; P = .004). All IS reconstructions failed by graft pullout from the femoral tunnel, whereas 5 of the 6 SA reconstructions failed by anchor pullout. Conclusion: In this biomechanical study using a cadaveric model of MPFL reconstruction, SA femoral fixation was not significantly different from IS fixation in terms of load to failure. The mean load-to-failure values for both reconstruction techniques were greater than the literature-reported values for the native MPFL. Clinical Relevance: These results suggest that SAs are a biomechanically viable alternative for femoral-sided graft fixation in MPFL reconstruction.

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