The Effects of Surface Roughness and Polymethylmethacrylate Precoating on the Radiographic and Clinical Results of the Iowa Hip Prosthesis. A Study of Patients Less Than Fifty Years Old*

1999 ◽  
Vol 81 (4) ◽  
pp. 481-92 ◽  
Author(s):  
SCOTT M. SPORER ◽  
JOHN J. CALLAGHAN ◽  
JASON P. OLEJNICZAK ◽  
DEVON D. GOETZ ◽  
RICHARD C. JOHNSTON
Keyword(s):  
Surface Roughness ◽  
Hip Prosthesis ◽  
Clinical Results

Clinical Results for 19 to 21 Years on Total Hip Prosthesis with Ceramic Head Combined with UHMWPE Socket

2007 ◽  
pp. 1303-1306
Author(s):  
Hiroyuki Oonishi ◽  
Hironobu Oonishi ◽  
Sok Chol Kim ◽  
Shingo Masuda ◽  
Masaru Ueno ◽  
...  
Keyword(s):  
Hip Prosthesis ◽  
Clinical Results ◽  
Ceramic Head ◽  
Total Hip Prosthesis ◽  
Total Hip

scholarly journals Comparison of the Clinical Results of Identically Designed Total Knee Prostheses with Different Surface Roughnesses

Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 486
Author(s):  
Sang Hyun Ko ◽  
Kyoung Ho Moon
Keyword(s):  
Surface Roughness ◽  
Knee Prosthesis ◽  
Functional Results ◽  
Clinical Results ◽  
Knee Prostheses ◽  
Total Knee Prosthesis ◽  
Significant Evidence ◽  
Average Surface ◽  
Total Knee ◽  
The Difference

The purpose of this study was to investigate the effects of the undersurface roughness of total knee prosthesis on clinical outcomes. We compared the clinical and radiological outcomes and prosthesis survivals in patients who underwent total knee arthroplasty using prosthesis with identical designs but different surface roughness (average surface roughnesses (Ra), 5.0 μm vs. 11.6 μm). The results showed that the knee prostheses with a more roughened undersurface (Ra = 11.6 μm) produced significantly better functional results and enhanced prosthesis survival. The difference in surface roughness was associated with incidence of osteolysis and loosening at the tibial baseplate, but not at the femoral component. Overall, our results provided significant evidence that the use of roughened undersurface of tibial baseplate would be a way to prevent aseptic loosening.

Analysis of the surface topography of retrieved metal-on-polyethylene reverse shoulder prostheses

2020 ◽  
Vol 234 (12) ◽  
pp. 1353-1362
Author(s):  
Israel Ramírez-Martínez ◽  
Susanna Stea ◽  
Thomas J. Joyce
Keyword(s):  
Surface Roughness ◽  
Shoulder Arthroplasty ◽  
Polyethylene Wear ◽  
Ex Vivo ◽  
Reverse Shoulder Arthroplasty ◽  
Clinical Results ◽  
Term Survival ◽  
Patient Variables ◽  
Joint Arthroplasties

Despite the encouraging short- and medium-term clinical results and increased usage of reverse shoulder replacements, a higher revision rate is documented compared with other major joint arthroplasties. Adverse reaction to polyethylene wear debris is still an important factor which may influence the long-term survival of reverse shoulder arthroplasty. To date, only a small number of retrieval studies of reverse shoulder arthroplasty have reported the different damage modes on polyethylene components, but none have quantified the ex vivo surface roughness on both articulating surfaces. The main purpose of this study was to assess, for the first time, the surface roughness of 13 retrieved metal-on-polyethylene reverse shoulder replacements using a white light profilometre with nanometre resolution. Although no significant relationship was observed between the surface roughness values and patient variables, it was noted that half of the polyethylene components still showed their original machining marks, indicating little change in vivo and that the metallic humeral components in the reversed design configuration showed low values of surface roughness after their time in vivo.

Clinical Results for 19 to 21 Years on Total Hip Prosthesis with Ceramic Head Combined with UHMWPE Socket

2007 ◽  
Vol 361-363 ◽  
pp. 1303-1306
Author(s):  
Hiroyuki Oonishi Jr. ◽  
Hironobu Oonishi ◽  
Sok Chol Kim ◽  
Shingo Masuda ◽  
Masaru Ueno ◽  
...  
Keyword(s):  
Wear Rate ◽  
Hip Prosthesis ◽  
Radiolucent Line ◽  
Clinical Results ◽  
Alumina Ceramic ◽  
Ceramic Head ◽  
Total Hip Prosthesis ◽  
Total Hip ◽  
Metal Head

In total hip prosthesis (THP), we have been using alumina ceramic femoral heads to reduce polyethylene debris and the modified cementing technique, which was named “interface bioactive bone cement (IBBC)” method to improve implant fixation. In this study, we investigated the long-term clinical performance of THPs with an alumina ceramic head and IBBC method. From 1986 to 1988, 285 joints (215 patients) were operated on by a senior surgeon, and 265 joints (192 patients) could be followed up. The presence of radiolucent lines, loosening, osteolysis and ultrahigh-molecular-weight polyethylene (UHMWPE) socket wear were observed. In IBBC, a radiolucent line appeared as a ’space’, and loosening appeared as a ’separation’ between the HA layer and the cement. A ‘space’ appeared in 3 joints (1.4%) on the acetabulum and in 4 joints (1.8%) on the femur, while a ‘separation’ appeared in 3 joints (1.4%) on the acetabulum. Osteolysis was noted in 1 joint (0.5%) on the acetabulum and in 2 joints (0.9%) on the femur. No revision surgery was required. In our previous study, we reported that the thickness of the socket affected its clinical wear rate and that the wear rate of sockets with an alumina ceramic head was 20% lower than that of sockets with a metal head. By reducing wear debris through the use of ceramic heads, osteolysis could be reduced. Long-term fixation of THPs to the bone has been achieved by using IBBC. Thus, the long-term clinical results of THPs with an alumina head that were fixed using IBBC were excellent.

Stem surface roughness alters creep induced subsidence and ‘taper-lock’ in a cemented femoral hip prosthesis

2001 ◽  
Vol 34 (10) ◽  
pp. 1325-1333 ◽  
Author(s):  
T.L Norman ◽  
G Thyagarajan ◽  
V.C Saligrama ◽  
T.A Gruen ◽  
J.D Blaha
Keyword(s):  
Surface Roughness ◽  
Hip Prosthesis ◽  
Lock In

Initial experience with a newly developed cementless hip endoprosthesis

2009 ◽  
Vol 22 (02) ◽  
pp. 153-158 ◽  
Author(s):  
G. Delfs ◽  
V. Hach
Keyword(s):  
Hip Prosthesis ◽  
Weight Bearing ◽  
Clinical Signs ◽  
Femoral Stem ◽  
Hip Osteoarthritis ◽  
Clinical Results ◽  
The Body ◽  
Technical Errors ◽  
Long Term Follow Up ◽  
History Of

SummaryThe HELICA-Endoprosthesis is a newly developed cementless hip prosthesis for dogs. It was implanted in 39 dogs that had severe hip osteoarthritis and a history of hip pain, as well as in one dog that had chronic hip luxation. One dog had a bilateral arthroplasty. The body weight of the patients ranged between 22 and 54 kg and their ages between nine months and 10 years. Both the femoral stem and acetabular component of the prosthesis were screwed into position following bony preparation. Additional fixation was not necessary as the components remain fixed in position until osteointegration is complete. There are currently five sizes of prosthesis available, and the various components such as the stem, cup and head are readily interchangeable. Although it appeared that good osseous anchorage of the prostheses in the bone on the surgery table had been obtained, three patients experienced both stem and cup loosening (one week, three weeks and six months after surgery). In one animal, stem loosening was observed six weeks after surgery, and another dog experienced a cup loosening two weeks postoperatively. Most of the complications were due to technical errors that occurred during the learning phase. Surgical revisions were successful in three out of five animals. In two animals we had to perform a femoral head and neck excision. Two other animals experienced radiographic bone resorption underneath the segmented collar of the femoral prosthesis but did not show any significant clinical signs of lameness. Another dog that showed signs of ischial neuropraxy after surgery, recovered completely within six weeks after surgery. All of the dogs were capable of weight bearing on the operated leg one day after surgery. The main advantage of the HELICA-Endoprosthesis is the relatively easy surgical technique and short surgery time. The initial clinical results in these 40 cases have been very encouraging. The aim of this study was to assess the early clinical results in these 39 dogs. Final evaluation can only be based on the results of gait analysis, long-term follow-up, and post mortem histological analysis.

The canine cemented modular total hip prosthesis

1995 ◽  
Vol 31 (2) ◽  
pp. 109-124 ◽  
Author(s):  
ML Olmstead
Keyword(s):  
Veterinary Medicine ◽  
Hip Replacement ◽  
Hip Prosthesis ◽  
Clinical Results ◽  
Total Hip Prosthesis ◽  
Total Hip ◽  
Modular Prosthesis ◽  
Technical Advances ◽  
A Prospective Study ◽  
Better Than

Total hip replacement (THR) is well established as a treatment modality for dogs with noninfectious, nonneoplastic, disabling conditions of the coxofemoral joint. Since the mid 1970s, a fixed-head prosthesis has been used in this procedure. A modular prosthesis, which is based on many of the technical advances found in human prostheses, now is available for use in veterinary medicine. The prosthesis, surgical instrumentation, surgical technique, and clinical results have been evaluated in a prospective study conducted at The Ohio State University's College of Veterinary Medicine. The modular prosthesis provides results equal to or better than the fixed-head prosthesis.

Low Plasticity Burnishing: An Innovative Manufacturing Method for Biomedical Applications

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
C. Y. Seemikeri ◽  
P. K. Brahmankar ◽  
S. B. Mahagaonkar
Keyword(s):  
Surface Roughness ◽  
Fatigue Life ◽  
Surface Integrity ◽  
Biomedical Applications ◽  
Hip Prosthesis ◽  
Surface Hardness ◽  
Surface Characteristics ◽  
Manufacturing Method ◽  
Work Material ◽  
Low Plasticity Burnishing

Biomedical manufacturing technologies are assuming highly visible position at the frontiers of manufacturing. A new field, “engineered surfaces,” is emerging as a more effective and economic route to successful manufacture. Low plasticity burnishing (LPB) is relatively a new method of surface enhancement, which raises the burnishing to the next level of sophistication. LPB can provide deep and stable surface compression for improved surface integrity characteristics. This technology could be applied to diversified biomedical applications, since it has the potential to improve many surface characteristics, such as low- and high-cycle fatigue strengths, surface finish, surface hardness, corrosion resistance, wear resistance, etc. The present study focuses on the surface roughness, microhardness, surface integrity, and fatigue life aspects of AISI 316L work material, which is most commonly used in prosthesis, using full factorial design of experiments. Favorable and optimum conditions could be predicted and tailored for different biomedical requirements and applications. The assessment of the surface integrity aspects on work material was done, in terms of identifying the predominant factors, their order of significance, evaluating the interaction effects of parameters, and setting the levels of the factors for minimizing surface roughness and∕or maximizing surface hardness and fatigue life. Regression models were developed for surface characteristics of importance as response variables. Subsurface microhardness studies were also done to assess the depth of compression, altered material zone, and correlate fatigue life with surface roughness and surface hardness. The process can be applied to critical components used in biomedical field, such as total hip prosthesis, invasive surgeries, or medical implants effectively, as the LPB process today has significant process cycle time advantages, lower capital cost, and adaptability to conventional machine shop environment.

Sign in / Sign up

Export Citation Format

Share Document