PubMed Health⌕ Search

Biomedical subjects

Edward H Yian

Publications and source records attributed to Edward H Yian.

8 recordsLinked to original sources
PubMed2006

Coonrad-Morrey total elbow replacement for primary and revision surgery: a 2- to 7.5-year follow-up study.

In this study, 23 patients were treated with the Coonrad-Morrey total elbow prosthesis for posttraumatic arthrosis (15 cases), acute distal humeral fracture (1 case), inflammatory arthritis (3 cases), and revision of another type of total elbow prosthesis (4 cases). After a mean follow-up of 4 years (range, 2-7.5 years) or at revision as a result of loosening or infection, 78% had a satisfactory outcome according to the Mayo Elbow Performance Score. Of the patients, 16 (70%) had no or mild pain and 7 had moderate to severe pain. The loosening rate was 17%. Possible risk factors for loosening were poor cementing and anterior coronoid impingement. Of the patients, 10 (43%) had complications and 7 of these (30%) required revision surgery. The Coonrad-Morrey total elbow prosthesis can lead to successful outcomes for difficult elbow pathologies. However, the complication rate was higher in our series than previously reported. Some technical aspects for use of this implant are outlined.

Adult↗
PubMed2006

Lesser tuberosity osteotomy for total shoulder arthroplasty. Surgical technique.

BACKGROUND: Recent studies have suggested that tenotomy and repair of the subscapularis tendon carried out for anterior approaches to the shoulder can be followed by failure of the tendon repair and by changes resulting in permanent loss of subscapularis function. We hypothesized that release of the subscapularis with use of a superficial osteotomy of the lesser tuberosity followed by repair of the two opposing bone surfaces would lead to consistent bone-to-bone healing, which would be possible to monitor radiographically, and would lead to satisfactory clinical and structural outcomes. METHODS: Thirty-nine shoulders in thirty-six consecutive patients who, at an average age of fifty-seven years, had undergone total shoulder replacement through an anterior approach involving an osteotomy of the lesser tuberosity were evaluated at an average of thirty-nine months. Assessment included a standardized interview and physical examination, scoring according to the system described by Constant and Murley, and imaging with conventional radiography and computed tomography to assess healing of the osteotomy site and changes in the subscapularis. RESULTS: The osteotomized tuberosity fragment healed in an anatomical position in all shoulders, and no cuff tendon ruptures were observed. At the time of follow-up, thirty-three (89%) of thirty-seven shoulders evaluated with a belly-press test had a negative result and twenty-seven (75%) of thirty-six shoulders evaluated with a lift-off test had an unequivocally normal result. Fatty infiltration of the subscapularis muscle increased after the operation (p < 0.0001) and was at least stage two in eleven (32%) of thirty-four shoulders. The fatty infiltration had progressed by one stage in eight (24%) of the thirty-four shoulders, by two stages in five shoulders (15%), and by three stages in two shoulders (6%). CONCLUSIONS: Osteotomy of the lesser tuberosity provides an easy anterior approach for total shoulder replacement and is followed by consistent bone-to-bone healing, which can be monitored, and good subscapularis function. In the presence of documented anatomical healing of the osteotomy site, postoperative fatty infiltration of the subscapularis muscle remains unexplained and needs to be investigated further as it is associated with a poorer clinical outcome.

Adult↗
PubMed2005

Radiographic and computed tomography analysis of cemented pegged polyethylene glenoid components in total shoulder replacement.

BACKGROUND: Glenoid loosening continues to be the primary reason for failure of total shoulder arthroplasty. The purpose of this study was to evaluate, with use of a sensitive and reproducible imaging method, the radiographic and clinical results of total shoulder replacement with a pegged, cemented polyethylene glenoid implant. METHODS: Forty-three patients (forty-seven shoulders) underwent a total shoulder replacement with a cemented polyethylene glenoid component with four threaded pegs. The patients were examined clinically, with fluoroscopically guided radiographs, and with computed tomography at an average of forty months. In addition to conventional scoring of radiographic lucency, an 18-point scoring system was used to quantify cement-peg lucencies in six zones of the back surface of the glenoid component as seen on computed tomography scans. RESULTS: On the average, the absolute Constant score improved from 39 points preoperatively to 70 points at the time of follow-up (p = 0.0001) and the pain score improved from 5 to 13 points (p = 0.001). The mean active anterior elevation improved by 34 degrees (p = 0.001) and the mean abduction, by 46 degrees (p = 0.006). Two patients had symptomatic glenoid loosening requiring revision. Twenty-one of the forty-seven shoulders had radiographic lucency around the glenoid pegs, and nine had progression of the lucency by at least two grades. Computed tomography detected lucencies, primarily at the bone-cement interface, in thirty-six shoulders. The scores for the lucencies seen on the computed tomography scans were associated with the radiographic lucency scores (p < 0.001), pain scores (p = 0.04), and abduction strength (p = 0.02). Computed tomography was more sensitive than radiography with regard to identifying the number of pegs associated with lucency and the size of the lucencies. The overall reproducibility of the scoring based on the computed tomography was higher than that of the radiographic scoring. CONCLUSIONS: Computed tomography provided a more sensitive and reproducible tool for the assessment of loosening of pegged glenoid components than did fluoroscopically guided conventional radiography. Further improvement in implant design and fixation technique appears to be necessary for long-term success of cemented glenoid components.

Adult↗
PubMed2005

Subscapularis muscle function and structure after total shoulder replacement with lesser tuberosity osteotomy and repair.

BACKGROUND: Recent studies have suggested that tenotomy and repair of the subscapularis tendon carried out for anterior approaches to the shoulder can be followed by failure of the tendon repair and by changes resulting in permanent loss of subscapularis function. We hypothesized that release of the subscapularis with use of a superficial osteotomy of the lesser tuberosity followed by repair of the two opposing bone surfaces would lead to consistent bone-to-bone healing, which would be possible to monitor radiographically, and would lead to satisfactory clinical and structural outcomes. METHODS: Thirty-nine shoulders in thirty-six consecutive patients who, at an average age of fifty-seven years, had undergone total shoulder replacement through an anterior approach involving an osteotomy of the lesser tuberosity were evaluated at an average of thirty-nine months. Assessment included a standardized interview and physical examination, scoring according to the system described by Constant and Murley, and imaging with conventional radiography and computed tomography to assess healing of the osteotomy site and changes in the subscapularis. RESULTS: The osteotomized tuberosity fragment healed in an anatomical position in all shoulders, and no cuff tendon ruptures were observed. At the time of follow-up, thirty-three (89%) of thirty-seven shoulders evaluated with a belly-press test had a negative result and twenty-seven (75%) of thirty-six shoulders evaluated with a lift-off test had an unequivocally normal result. Fatty infiltration of the subscapularis muscle increased after the operation (p < 0.0001) and was at least stage two in eleven (32%) of thirty-four shoulders. The fatty infiltration had progressed by one stage in eight (24%) of the thirty-four shoulders, by two stages in five shoulders (15%), and by three stages in two shoulders (6%). CONCLUSIONS: Osteotomy of the lesser tuberosity provides an easy anterior approach for total shoulder replacement and is followed by consistent bone-to-bone healing, which can be monitored, and good subscapularis function. In the presence of documented anatomical healing of the osteotomy site, postoperative fatty infiltration of the subscapularis muscle remains unexplained and needs to be investigated further as it is associated with a poorer clinical outcome.

Adult↗
PubMed2005

A case series and review of salvage surgery for refractory humeral shaft nonunion following two or more prior surgical procedures.

The orthopedic surgery literature is replete with techniques for managing primary humeral shaft nonunions, with success rates upwards of 90 percent with plate fixation and autogenous bone grafting. Despite this success, persistent nonunion following one or more initial failed nonunion interventions can occur, imposing a significant clinical and surgical challenge. We report the application of a standard treatment protocol for refractory humeral shaft nonunions including optimization of patient co-morbidities in the peri-operative period, rigid 4.5mm compression plating with a minimum of eight cortices of fixation proximal and distal to the nonunion site, and utilization of autogenous bone grafting. This study, a retrospective review of seven patients, all managed based on this standard treatment protocol, revealed that all achieved fracture nonunion within six months of revision surgery. Six of seven patients were clinically satisfied with the outcome of surgery; one remained dissatisfied secondary to a chronic neuropathic pain syndrome. Although more complex surgical options such as Ilizarov external fixation and allograft cortical strut augmentation have been reported, and are available in the salvage situation of refractory humeral nonunions, we conclude strict application of basic nonunion principles can result in successful salvage of humerus nonunions in patients who have failed two or more prior surgical interventions.

Adult↗
PubMed2004

Arthroscopic posterior portal closure.

Posterior "working" portals in arthroscopic posterior stabilization could result in defects of the posterior capsule if not repaired. We describe a single portal technique used to close the posterior portal defect after arthroscopic stabilization. It is a safe and easy-to-perform technique, which could strengthen the structural integrity of the repair.

Arthroscopy↗
PubMedDate not supplied

The Constant score in normal shoulders.

Relative Constant-Murley shoulder scores are based on an age- and sex-matched normal population from Constant's original research. The purpose of this study was to determine normal Constant scores in a contemporary population and compare these values with those originally established by Constant. Two subject groups were analyzed. The first group comprised 1620 clinic patients whose normal shoulders were scored by resident physicians instructed on the Constant scoring technique. The second group comprised 115 healthy volunteers whose normal shoulders were scored by 1 experienced physician-researcher. There were no significant score differences between the two groups, indicating that, after instruction, scoring did not depend on tester experience. In both groups, there were significant score differences between sex and age groups. Similar to Constant's study, age-related declines in scores and strength existed for both sexes but were less pronounced. Using Constant's original values to calculate relative scores can overestimate shoulder function in women aged over 40 years and men aged over 60 years. If relative Constant scores are used, absolute scores should be concurrently reported to allow comparisons with different populations.

Adolescent↗