Background: Patients with irreparable rotator cuff tears have a defect of the superior capsule, which creates discontinuity shoulder capsule in transverse direction (anterior-posterior direction). This effect is one causes underlying instability after tears. Purpose/Hypothesis: The purpose this study was to assess effects anterior and posterior continuity on biomechanics reconstruction (SCR). hypothesis that capsular would improve glenohumeral stability SCR. Study Design: Controlled...

Patients with pseudoparalysis and irreparable rotator cuff tears have very poor function. The authors developed a superior capsule reconstruction (SCR) technique for that restores shoulder stability muscle balance, improving function relieving pain.To evaluate whether arthroscopic SCR reversed preoperative in patients tears.Case series; Level of evidence, 4.One hundred consecutive underwent fascia lata autografts; 7 deltoid weakness from cervical or axillary nerve palsy 5 severe presurgical...

Although sports participation and heavy physical work can contribute to rotator cuff tears, many patients expect return these activities after surgery; however, irreparable tears preclude this outcome. A new surgical treatment-arthroscopic superior capsule reconstruction (SCR)-restores shoulder stability muscle balance in with tears; consequently, it improves function relieves pain.To evaluate the rates of among treated arthroscopic SCR.Cohort study; Level evidence, 3.From 2007 2014, we...

Background: Arthroscopic superior capsule reconstruction was developed to restore stability, muscle balance, and function in the shoulder joint after an irreparable rotator cuff tear. Our objective assess functional radiographic results of 5 years follow-up. Methods: Thirty patients who underwent arthroscopic using fascia lata autograft were enrolled this study. The inclusion criteria tear confirmed by arthroscopy postoperative Shoulder range motion, American Elbow Surgeons (ASES) Japanese...

Postoperative outcomes of cervical pedicle screw (CPS) placement were evaluated. The screws inserted in degenerative vertebrae using anatomic landmarks.To evaluate the risks this procedure caused by misplacements and subsequent complications.The CPS gives superior vertebral fixation but causing artery spinal cord injury. However, few clinical reports have been published concerning misplacement complications. Therefore, risk is still unclear.There 18 consecutive patients, who submitted to...

Abstract The interfaces between four kinds of surfaceactive ceramic and bone were studied by scanning electron microscopy (SEM) transmission (TEM) using undecalcified specimens. materials Bioglass®‐type glass (Bioglass®), Ceravital‐type glass‐ceramic (KGS), apatite wollastonitecontaining (A‐W · GC) hydroxyapatite (HA)· Particles these materials, ranging about 100 300 μm in diameter, implanted into rat tibiae, specimens prepared for observation at 8 weeks after implantation. All observed to...

Abstract Apatite formation on the surface of three kinds bioactive material at an early stage after implantation in bone was studied using transmission electron microscopy (TEM). The materials were apatite‐ and wollastonite‐containing glass‐ceramic (A‐W GC) as a surface‐active glass‐ceramic, dense sintered hydroxyapatite (HA) ceramic, β‐tricalcium phosphate (β‐TCP) resorbable ceramic. Particles these materials, ranging from 100–300 μm diameter, implanted into rat tibviae, specimens prepared...

The precise biological characteristics of human mesenchymal stem cells (hMSCs), including growth regulatory mechanisms, have not yet been defined. Using 29 strains hMSCs isolated from bone marrow, we performed extensive analyses the profiles in vitro. All stopped proliferating with a mean population doubling (PD) 28, although there was considerable difference among strains. telomere restriction fragment length passaged twice correlated well final number PDs each strain, suggesting value this...

Retrospective survey.To clarify the present incidence and management of iatrogenic vertebral artery injury (VAI) during cervical spine surgery.VAI is a rare complication surgery, but it may be catastrophic. Anterior decompression (ACD) posterior atlantoaxial transarticular screw fixation (Magerl fixation) have been main causes, with reported incidences 0.3% to 0.5% 0% 8.2%, respectively. Popular new surgical techniques, such as pedicle or C1 lateral mass fixation, also entail potential risk...

In Brief Study Design. We evaluated the trajectories of atlantoaxial transarticular and C2-pedicle screws in 3 dimensions using computerized tomography. Objective. To compare anatomic risk for vertebral artery injury associated with screws. Summary Background Data. The fixation technique C1-lateral mass combined is considered a safer preventing than fixation. However, few reports have compared that Methods. A total 62 consecutive patients cervical lesions were 3-dimensional images...

In Brief Study Design. A retrospective clinical study. Objective. To confirm the impact of O-C2 angle on dyspnea and dysphagia after posterior occipitocervical (O-C) fusion. Summary Background Data. Dyspnea are complications O-C fusion with malalignment, may be prolonged or occasionally serious. However, it is difficult to select a safe alignment during surgery, no indicators appropriate have been available preclude these complications. Methods. The authors retrospectively reviewed 29...

Background: Acromioplasty is increasingly being performed for both reparable and irreparable rotator cuff tears. However, acromioplasty may destroy the coracoacromial arch, including ligament, consequently causing a deterioration in superior stability even after capsule reconstruction. Purpose/Hypothesis: The purpose of this study was to investigate effects on shoulder biomechanics reconstruction supraspinatus tendon hypothesis that with would decrease area subacromial impingement without...

Abstract The interface between bioactive ceramics and bone was studied by scanning electron microscopy (SEM) transmission (TEM). materials were apatite‐wollastonite‐containing glass ceramic (A‐W · GC) as a representative surface‐active ceramic, calcite p‐tricalcium phosphate (p‐TCP) resorbable ceramics. Particles of these materials, ranging about 100 pm 300 in diameter, implanted into rat tibiae, specimens prepared for observation at 8 weeks after implantation. Both SEM TEM demonstrated that...

A new bioactive bone cement (designated GBC) consisting of polymethyl methacrylate (PMMA) as an organic matrix and glass beads inorganic filler has been developed. The beads, MgO-CaO-SiO2-P2O5-CaF2 glass, have newly designed, a novel PMMA powder was selected. purpose the present study to compare this GBC's mechanical properties in vitro its osteoconductivity vivo with cements same GBC either apatite- wollastonite-containing glass–ceramic (AW-GC) AWC) or sintered hydroxyapatite (HA) (HAC)....

Study Design. The feasibility of inserting a screw for the narrow isthmus with high-riding vertebral artery was evaluated in patients subjected to posterior atlantoaxial transarticular fixation. Objective. To demonstrate bilateral screws and obtaining stable complex artery. Summary Background Data. Posterior fixation entails potential risk injury, which may be lethal. is much higher caused by artery, many authors recommend that procedure should abandoned if too narrow. On other hand,...