scholarly journals The Ringloc liner compared with the Hexloc liner in total hip arthroplasty

2009 ◽  
Vol 1 (1) ◽  
pp. 16 ◽  
Author(s):  
Olof Sköldenberg ◽  
Mats Salemyr ◽  
Olle Muren ◽  
Åke Johansson ◽  
Torbjörn Ahl ◽  
...  
Keyword(s):  
Survival Rate ◽  
Penetration Rate ◽  
Osteolytic Lesion ◽  
Femoral Stem ◽  
Clinical Results ◽  
Linear Wear ◽  
Osteolytic Lesions ◽  
Linear Wear Rate ◽  
Head Penetration ◽  
Pelvic Osteolysis

The aim of this study was to compare the 10-year survival rate, pelvic osteolysis frequency and linear head penetration rate of the Hexloc and Ringloc liners used together with a partially threaded porous and hydroxyapatite coated cup and the Bi-Metric uncemented femoral stem. The 15-year results for the cup with the Hexloc liner are also reported. We included 332 consecutive hips (166 Hexloc and 166 Ringloc) on 281 patients in the study. Revisions of prosthesis components were recorded and pelvic osteolytic lesions were assessed using radiographs and computed tomography. The linear head penetration rate was measured using the Martell method. The 10-year survival rate of the liner with revision due to liner wear and/or osteolysis as endpoint was 88% for the Hexloc liner and 98% for the Ringloc liner. The 15-year survival rate of the Hexloc liner was 67%. Pelvic osteolysis was found in 27% of the Hexloc and 19% of the Ringloc hips. After 15 years, 53% of the Hexloc hips had developed an osteolytic lesion. The linear head penetration rate was 0.16 mm/year for the Hexloc liner and 0.12 mm/year for the Ringloc liner. This paper is the first to describe the rapidly deteriorating survival up to 15 years with the old generation gamma-in-air sterilized polyethylene used in Hexloc liners. The newer Ringloc liner with the ArCom™ polyethylene has superior clinical results but a linear wear rate and frequency of osteolytic lesions that is higher than expected.

Healing Of A Large Osteolytic Mandibular Lesion – A Case Report

2018 ◽  
Author(s):  
Ingrid Różyło-Kalinowskav ◽  
Karolina Sidor
Keyword(s):  
Case Report ◽  
Female Patient ◽  
Surgical Approach ◽  
Orthodontic Treatment ◽  
Incidental Finding ◽  
Osteolytic Lesion ◽  
Panoramic Radiograph ◽  
Endodontic Treatment ◽  
Osteolytic Lesions

The purpose of this article was to present a case report of 11–year old female patient with a large osteolytic mandibular lesion which healed after endodontic treatment. The patient was referred for radio diagnostics due to an incidental finding of a large osteolytic lesion of the area of the left lower first and second premolars in the panoramic radiograph taken before orthodontic treatment. CBCT was performed and the patient asked to have teeth 33-35 treated by endodontics before surgery. The patient missed the surgical appointment and when she reappeared several months later, the lesion showed signs of healing thus surgery were aborted. The presented case testifies to the observation that even large osteolytic lesions can heal after endodontic treatment without surgical approach.

scholarly journals Short (6 mm) and Regular Dental Implants in the Posterior Maxilla–7-Years Follow-up Study

2021 ◽  
Vol 10 (5) ◽  
pp. 940
Author(s):  
Jakub Hadzik ◽  
Paweł Kubasiewicz-Ross ◽  
Izabela Nawrot-Hadzik ◽  
Tomasz Gedrange ◽  
Artur Pitułaj ◽  
...  
Keyword(s):  
Survival Rate ◽  
Dental Implants ◽  
Clinical Results ◽  
Implant Survival ◽  
Implant Survival Rate ◽  
Short Implants ◽  
Posterior Maxilla ◽  
Patient Reported ◽  
Bone Level

Short 6 mm dental implants are considered as an alternative to the maxillary sinus elevation and bone augmentation procedure where there is a reduced alveolar ridge height. The aim of this study was to compare the implant survival rate between short dental implants (6 mm) and regular length implants (11–13 mm) when placed in combination with bone grafting and loaded with a single non splinted crown, seven years after placing the implant. It was conducted as a controlled clinical study of 30 patients with partial edentulism in the posterior maxilla. The protocol included radiological and clinical evaluation of the C/I ratio (length of the superstructure divided by the length of the implant crestal part), marginal bone level (MBL), ultrasonography measurement of soft tissue surrounding implant (STT), patient-reported outcomes, and biological and technical complications. A total number of 28 implants (93%) remained integrated during follow-up period. MBL of 0.50 and 0.52 mm was observed for short implants and regular implants, respectively. MBL was checked for correlation with STT, and a negative correlation was found between MBL: STT. Our study has demonstrated a significantly lower implant survival rate for short implants compared to regular implants (87% compared to 100%). Despite the loss of several implants, good clinical results were achieved in the remaining implants in both groups. It is, therefore, worth considering short implants as an alternative to regular implants with a sinus lift surgery.

scholarly journals Cross-segment spinal plasma cell granuloma:a case report

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Renqin Lin ◽  
Shenglin Wang ◽  
Jianhua Lin ◽  
Zhenzhen Zhang ◽  
Xuanwei Chen
Keyword(s):  
Plasma Cell ◽  
Plasma Cells ◽  
Osteolytic Lesion ◽  
Thoracolumbar Spine ◽  
Pathological Examination ◽  
Complete Excision ◽  
Surgical Specimen ◽  
Osteolytic Lesions ◽  
First Case ◽  
Thoracolumbar Region

Abstract Background Plasma cell granuloma (PCG) is a rare non-neoplastic entity, with the precise etiology remaining unclear. Vertebra-affected spinal PCG has not been reported yet. This report presented a case with cross-segment spinal PCG in thoracolumbar region. Case presentation A 32-year-old male patient presented to the authors’ hospital since his health check-up results showed osteolytic lesions in the thoracolumbar spine. He felt asymptomatic throughout the course. Radiological examination revealed destructive changes at T12 and L1 vertebrae. Whereas laboratory examination excluded malignant tumor. The results of routine incisional biopsy remained inconclusive, thereby necessitating complete excision of the lesions. Finally, the infiltration of plasma cells observed by pathological examination of the surgical specimen confirmed the diagnosis of PCG. Conclusions To the authors’ knowledge, this was the first case of cross-segment spinal PCG with osteolytic property. The possibility of PCG should be considered for the diagnosis and differential diagnosis of an osteolytic lesion in the spine. Since the etiology of PCG is unknown, the disorder was confirmed based on excluded diagnosis. Surgical resection is recommended both for the definite diagnosis and treatment of spinal PCG.

Analysis of the Factors that Predispose to Wear with a 32mm Femoral Head at 5–15 Year follow-up: Clinical and Radiographic Assessment of the Harris-Galante cup at 5–15 Year follow-up

2003 ◽  
Vol 13 (2) ◽  
pp. 65-73
Author(s):  
M. Katsimihas ◽  
G. Katsimihas ◽  
M.B Lee ◽  
I. D. Learmonth
Keyword(s):  
Wear Rate ◽  
Polyethylene Wear ◽  
Young Patients ◽  
Harris Hip Score ◽  
Linear Wear ◽  
Outer Diameter ◽  
Linear Wear Rate ◽  
Total Hip Replacements ◽  
Hip Replacements

The clinical and radiographic features of 109 consecutive hybrid total hip replacements performed between 1986 and 1992 in 96 patients were retrospectively reviewed. A cementless Harris-Galante (HGP1) cup and a 32mm monobloc straight Muller stem were used in all cases. At an average 10.11 (range 5 to 15) years following surgery, the excellent durability of fixation of the Harris-Galante cup has been demonstrated with only one cup (0.9%) revised for periacetabular osteolysis and aseptic loosening. The prevalence of polyethylene wear was 27.4%. The mean annual linear wear rate was 0.063mm (range 0.00–0.53mm). There was a significantly increased wear of polyethylene inserts with an outer diameter < 52mm (<10mm polyethylene thickness), (ANOVA Test). However, there was no association found between acetabular liner wear and the following factors: underlying diagnosis, Charnley grade, age, weight and sex of the patient. The Harris Hip Score ranged between 5 and 54 pre-operatively and the average HHS was more than 80 post-operatively with more than 70% of patients pain-free. A liner with a thickness of 10mm or greater may prove beneficial in the prevention and reduction of wear rate particularly in young patients. It is recommended that all patients with this cup design, in which a polyethylene insert that is less than 10mm thick is coupled with a 32mm head, should continue to be regularly followed up.

Mid-term results of total hip arthroplasty using a novel uncemented short femoral stem with metaphyso-diaphyseal fixation

2020 ◽  
pp. 112070002090345 ◽  
Author(s):  
William G Blakeney ◽  
Martin Lavigne ◽  
Yann Beaulieu ◽  
Benjamin Puliero ◽  
Pascal-André Vendittoli
Keyword(s):  
Aseptic Loosening ◽  
Case Series ◽  
Stress Shielding ◽  
Femoral Stem ◽  
Clinical Results ◽  
Long Term Results ◽  
Stem Revision ◽  
Radiographic Outcomes ◽  
Modular Stem ◽  
Early Results

Purpose: Short stems were developed with the promise of providing easier implantation, facilitating revision, reducing thigh pain and proximal stress shielding. The aim of this study is to present the mid-term clinical results of a titanium short stem with modular neck. Methods: This is a prospective case series of 144 THAs performed on a series of 131 patients using the PROFEMUR Preserve Femoral Stem (MicroPort Orthopedics, Arlington, TN, USA). 2 surgeons, operated on the patients using a mini-posterior approach. The primary outcomes evaluated were stem revision for aseptic loosening and all-cause stem revision. Clinical and radiographic outcomes were also assessed. Results: Of the 144 THAs, there were 43 males and 101 females, with an average age of 61 (range 22–92) years at surgery. After a mean of 78 (range 53–87) months follow-up, there were 2 (1.5%) femoral implant revisions; 1 for early femoral periprosthetic fracture and 1 for fatigue failure of the modular femoral neck. There were no cases of stem aseptic loosening and radiographic analysis demonstrated no cases of stem migration. The mean UCLA activity, WOMAC and Fogotten Joint scores were respectively 6.1, 10.7 and 86.6. 70% of prosthetic hips were observed as having no restriction and 99.2% of patients were satisfied with their THA. Conclusions: This short modular stem produced satisfactory clinical and radiological results at mid-term, with 98.5% implant survival for any cause of stem revision and no revisions for aseptic loosening. Long-term results are required to further evaluate the stem’s promising early results.

FINGERTIP REPLANTATIONS: IMPORTANCE OF VENOUS ANASTOMOSIS AND THE CLINICAL RESULTS

Hand Surgery ◽  
2009 ◽  
Vol 14 (01) ◽  
pp. 1-6 ◽  
Author(s):  
Takaaki Hasuo ◽  
Genzaburo Nishi ◽  
Daiji Tsuchiya ◽  
Takanobu Otsuka
Keyword(s):  
Survival Rate ◽  
Nerve Repair ◽  
Venous Drainage ◽  
Clinical Results ◽  
High Survival ◽  
Venous Anastomosis ◽  
Nail Deformity ◽  
Sensory Recovery ◽  
Distal Interphalangeal ◽  
Protective Sensation

Overall survival rate for 143 digits with complete amputation of the distal phalanx was 78%. Replanted digits that underwent venous anastomosis showed a very high survival rate of 93%. Loss of the distal interphalangeal joint function in subzone IV was significantly inferior to that in subzones II and III. Protective sensation was achieved in 96% of replanted digits. Sensory recovery in the absence of nerve repair was significantly worse for avulsion injury than for crush injury. Nail deformity tended to be increased for replanted digits in subzone III or with crush-type injury. Successful venous anastomosis appears to offer the best way to promote survival of replanted digits. If venous anastomosis is infeasible, a replanted digit can survive with any methods for venous drainage in subzones II and III, but does not survive in subzone IV. To minimise nail deformity, repair of the germinal matrix is necessary.

scholarly journals Fixation of the Cemented Stem: Clinical Relevance of the Porosity and Thickness of the Cement Mantle

2009 ◽  
Vol 3 (1) ◽  
pp. 8-13 ◽  
Author(s):  
Philippe Hernigou ◽  
Gildasio Daltro ◽  
Charles Henri Flouzat Lachaniette ◽  
Xavier Roussignol ◽  
Martin Mukisi Mukasa ◽  
...  
Keyword(s):  
Hip Arthroplasty ◽  
Review Paper ◽  
Mechanical Stability ◽  
Femoral Stem ◽  
Clinical Results ◽  
Cement Mantle ◽  
Frictional Torque ◽  
Stem Design ◽  
Cement Interface ◽  
Cemented Stem

The aim of this review paper is to define the fixation of the cemented stem. Polymethyl methacrylate, otherwise known as “bone cement”, has been used in the fixation of hip implants since the early 1960s. Sir John Charnley, the pioneer of modern hip replacement, incorporated the use of cement in the development of low frictional torque hip arthroplasty. In this paper, the concepts of femoral stem design and fixation, clinical results, and advances in understanding of the optimal use of cement are reviewed. The purpose of this paper is to help understanding and discussions on the thickness and the porosity of the cement mantle in total hip arthroplasty. Cement does not act as an adhesive, as sometimes thought, but relies on an interlocking fit to provide mechanical stability at the cement–bone interface, while at the prosthesis– cement interface it achieves stability by optimizing the fit of the implant in the cement mantle, such as in a tapered femoral stem.

In vitro comparison of the two hard-hard articulations for total hip replacements

2001 ◽  
Vol 215 (2) ◽  
pp. 153-160 ◽  
Author(s):  
C Rieker ◽  
R Konrad ◽  
R Schoun
Keyword(s):  
Wear Rate ◽  
Abrasive Wear ◽  
Experimental Methodology ◽  
Wear Behaviour ◽  
Linear Wear ◽  
Linear Wear Rate ◽  
Total Hip ◽  
Metal On Metal ◽  
In Vitro Comparison

Polyethylene particle disease is one of the major causes of late aseptic loosening of total hip replacement. Two hard-hard articulations (alumina-on-alumina and metal-on-metal) have been developed in Europe as an alternative to the ultra-high molecular weight polyethylene (UHMWPE) articulations. Even though these hard-hard articulations are on the market and numerous reports have been published about them, only a very limited number of studies allowing a direct in vitro comparison of the two articulations have been published so far. This paper compares in vitro these two types of articulation (alumina-on-alumina and metal-on-metal), which have been tested with a hip simulator for their tribological behaviour using exactly the same experimental methodology. This comparison shows that these two types of hard-hard articulation have very similar abrasive wear behaviour with four main features: 1. A running-in wear period (1 × 106 cycles) gives a cumulative wear of about 20 μm with head diameters of 28 mm. 2. After the running-in wear, there is a stabilization of the linear wear behaviour with a low linear wear rate/106 cycles for both types of articulation. 3. The volumetric wear rate of both articulations (<2.0 mm3/year for head diameters of 28mm) is significantly lower than that observed for metal-on-polyethylene or ceramic-on-polyethylene articulations having the same head diameter. 4. Abrasive wear is readily apparent (indicating a mixed lubrication regime) with both types of articulation. The extremely low wear performance of these articulations is confirmed and they constitute a lowwear alternative to the UHMWPE articulations currently used.

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