September 2009

P. N. Baker MRCS, MSc, I. A. McMurtry FRCS, G. Chuter MRCS, A. Port FRCS, J. Anderson FRCS

Clin Orthop Relat Res

THA with the ABG I Prosthesis at 15 Years
Excellent Survival with Minimal Osteolysis

“The survival of a series of 63 patients (69 hips) at a mean of 15 years (range, 13–17 years).”
“The 15-year survival of the femoral component was 98.6% (95% confidence interval, 88.8%–100.0%).”
“The ABG I prosthesis continues to show excellent long-term results.”

May 2007

Tonino, A. J.; Grimm, B.; Van der Wal, B. C.; Heyligers, I. C.

EFORT 2007

Post-mortem histological analysis of HA-coated hip stems: Bone ongrowth and HA reabsorption

May 2007

Panisello, J. J.; Canales, V.; Herrera, A.; Herrero, L.; Martinez, A.; Cuenca, J.

EFORT 2007

Long term remodelling in proximal femur around a hydroxyapatitecoated anatomic stem. Ten years densitometric follow-up

May 2007

De Kramer, B. J.; Van der Wal, B. C.; Grimm, B.; Heyligers, I. C.; Tonino, A. J.

EFORT 2007

Femoral fit in ABG-II hip stems: Influence on clinical outcome and bone remodelling

June 2005

van der Wal B.C.H, Tonino A.J, Geerdink C,Grimm B, Heyligers I.C

EFORT 2005

Analysis of periprosthetic fractures with the ABG I uncemented hip stem using an adjusted Vancouver classification system

June 2005

Tonino A.J, Geerdink C, Grimm B, Heyligers I.C

EFORT 2005

Different long-term results of the femoral stem and the acetabular cup of the ABG I Total Hip Arthroplasty system

June 2005

Asencio G

EFORT 2005

June 2005

Canales V

EFORT 2005

Ten year follow-up of an anatomic hydroxyapatite-coated hip prosthesis, the ABG I system

June 2005

Rossi R

EFORT 2005

2004

Oosterbos C J M, Rahmy A I A, Tonino A J, Witpeerd W

Acta Orthop Scand 2004; 75 (2): 127

High survival rate of hydroxyapatite-coated hip prostheses. 100 consecutive hips followed for 10 years

No radiographic signs of loosening of the femoral components. In course of time the location of dense bone around the femoral stem, which would suggest implant/bone stress transfer, moved distally in 51 of 67 stems after 10 years. No linear or distal osteolysis occurred around the stem. The 10-year survival of the stem and cup, using revision or pending revision as endpoint, was 100% (95% CI: 99-100) and 97% (95% CI: 94-99), respectively.

November 2004

Nourissat C, Asencio G, Berteaux D

SOFCOT 2004

ABG I Results at more than 10 years for patients below 50 years of age.

97% stem survivorship  15 years (97 hips)  

2004

ABG Scientific Group

Data In-House

International Multicentric Studies - ABG Cup and Stem

92% survivorship  10 years

Please refer to graph. #1

June 2004

Anderson J, Foster A

Presentation ABG Meeting, Nimes

ABG Experience (stem and cup)

95.4% survivorship  10 years (173 patients)  

June 2004

Herrera A, Canales V, Anderson J, Garcia-Araujo C, Murcia-Mazon A, Tonino A.J

Clin Orthop 2004 Jun; (423): 129-37

Seven to 10 Years Follow-Up of an Anatomic Hip Prosthesis: An International Study

96.15% survivorship (99.13% stem; 96.15% cup - 312 patients, 5 centres)  

June 2004

Blacha J

Acta Orthop Scand 2004 Jun; 75(3): 276-82

High Osteolysis and Revision Rate with the Hydroxyapatite-Coated ABG Hip Prostheses:

65 Hips in 56 Young Patients Followed for 5-9 Years Survivorship 98% stem, 59% cup  9 years (average age: 44)

April 2004

Oosterbos C.J.M, Rahmy A.I, Tonino A.J, Witpeerd W

Acta Orthop Scand 2004 Apr; 75(2): 127-33

High Survival Rate of Hydroxyapatite-Coated Hip Prostheses: 100 Consecutive Hips Followed for 10 Years

Survivorship 100% stem, 97% cup

April 2004

Asencio G

Orthopeadics Today International

Periacetabular Osteolysis of Uncemented Prostheses

Reference as summary of causes, detection & management / treatment of osteolysis.

January 2004

Duffy P, Sher J.L, Partington P.F

J Bone Joint Surg Br 2004 Jan; 86-B: 34-8

2003

Nourissat C, Adrey J, Berteaux D, Goalard C

Springer Verlag Muenchen 2003: 243-259

Fifteen Years of Clinical Experience with Hydroxyapatite Coatings in Joint Arthroplasty

92.18% survivorship (294 patients - 3 centres  > 10 years)

97.62% (stem) and 95.92% (cup)  

2003

Tonino A.J, Oosterbos C.J, Rahmy A.I, Therin M

Springer Verlag Muenchen 2003: 75-86

Fifteen Years of Clinical Experience with Hydroxyapatite Coatings in Joint Arthroplasty

What is the Function and Fate of the HA Coating in Cementless HA-Coated Hip Prostheses?

Histology and Histomorphometry Around Eight Hip Prostheses Retrieved at Post Mortem Between 3 and 9 Years After Successful Implantation.  

August 2003

Rogers A, Kulkarni R, Downes EM

J Arthroplasty 2003 Aug; 18(5): 619-25

October 2003

Nevalainen J, Keinonen A, M

ABG HA Hip Prosthesis in Primary Arthrosis in 1992-2001

>91% survivorship (cup & stem) 824 cases  10 years

Please refer to graph. #2

May 2003

Aebli N, Krebs J, Schwenke D, Stich H,Schawalder P, Theis J.C

J Bone Joint Surg Br 2003 May; 85-B: 499-503

April 2003

Garellick G, Herberts P, Malchau H

The Swedish National Hip Arthroplasty Register Annual Report 2002

ABG I Stem & Cup Results at 6 Years

95.5% survivorship (cup & stem)  

February 2003

Giannikas KA, Din R, Sadiq S, Dunningham TH

J Arthroplasty 2002 Feb; 17(2): 184-8

Medium-Term Results of the ABG Total Hip Arthroplasty in Young Patients

Survivorship 96.87%  2-7 yrs  

October 2009

M. P. Jackson,
S. A. Sexton,
E. Yeung,
W. L. Walter,
W. K. Walter,
B. A. Zicat

J Bone Joint Surg [Br]
2009;91-B:1296-300.

The effect of obesity on the mid-term survival and clinical utcome of cemenooutcome of cementless total hip replacement

The non-obese group was found to have a significantly higher post-operative Harris hip score (p < 0.001) and an increased range of movement, but overall satisfaction with surgery was comparable with that of the obese patients. Radiological analysis of the acetabular and femoral components showed no significant differences with regard to radiolucent lines, osteolysis, ingrowth of the femoral component, the acetabular inclination angle or alignment of the femoral component. Results suggest that the survival of cementless THR is not adversely affected by obesity.

Obese patients can therefore be counselled that despite a lower clinical score, they should expect to be satisfied with the result of their THR with a mid-term survival rate equivalent to that of non-obese patients.

May 2007

Tonino, A. J.; Grimm, B.; Heyligers, I. C.

EFORT 2007

May 2007

Grimm, B.; Tonino, A. J.; Heyligers, I. C.

EFORT 2007

8-year prospective randomized comparison between a crosslinked and conventional polyethylene in total hip arthroplasty

May 2007

De Kramer, B. J.; Van der Wal, B. C.; Grimm, B.; Heyligers, I. C.; Tonino, A. J.

EFORT 2007

2006

Geerdink C H, Grimm B, Ramakrishnan R, Rondhuis J,Verburg A J, Tonino A J

Acta Orthopaedica 2006; 77 (5): 719

Crosslinked polyethylene compared to conventional polyethylene in total hip replacement.

Pre-clinical evaluation, in-vitro testing and prospective clinical followup study

The Duration polyethylene showed a significantly lower in-vitro wear rate in the simulator study (mean 22 (SD 2.3) vs. 40 (SD 1.5) mm3/106 cycles). Also, the in-vivo wear was lower for Duration (mean 0.083 (SD 0.056) mm/year) than for conventional polyethylene (mean 0.123 (SD 0.082) mm/year). All radiographic signs of osteolysis were less frequent in the Duration group.

2006

Panisello J.J., Herrero L., Canales V., Herrera A., Martínez A., Cuenca J.

Rev Ortop Traumatol. 2006;50:419-24

Periprosthetic Remodelling with an Uncemented Anatomical Femoral Stem. A Three-Year Longitudinal Densitometric Study

At 3 years bone mineral density had increased in zones 2 (7.05%) and 6 (5.92%), and had decreased in zones 1 (8.26%) and 7 (16.81%) due to proximal atrophy. No differences in the remodeling pattern were seen due to differences in weight, age or position of the implant. Conclusions. The anatomic femoral stem achieves efficient fixation in the bone metaphysis, and a load transmission pattern that minimizes bone loss at this level and causes a long-term stimulus that allows bone preservation in more distal areas.

2006

Panisello JJ, Herrero L, Herrera A, Canales V, Martinez A, Cuenca J

Journal of Orthopaedic Surgery 2006;14(1):32-7

Bone remodelling after total hip arthroplasty using an uncemented anatomic femoral stem: a three-year prospective study using bone densitometry

54 patients had neutrally placed stems, while varus and valgus malalignment occurred in 6 and 9 patients, respectively. Only densitometry could detect traceable changes resulting from the differing biomechanics of the neutral, varus, and valgus stem alignments. Conclusion. The ABG II stem design made moderate errors in alignment biomechanically tolerable. Alignment defects had no clinical consequences and resulted in minimal differences in bone remodelling.

June 2005

Essig J

EFORT 2005

June 2005

Charriere E

EFORT 2005

June 2005

Panisello J

EFORT 2005

2004

Van der Wal B.C.H, Rahmy A.I.A, Grimm B, Blake G.M, Heyligers I.C, Tonino A.J

Journal Orthopaedic Research (application to the W. Harris award)

The influence of implant design on periprosthetic bone remodelling of two types of uncemented HA coated hip stems. A two years follow up study using DEXA.

The distinct differences in the effect on BMD confirms the philosophy behing the design changes from the ABG I to ABG II where a shorter stem, a polished distal and additional proximal HA coating was meant to enhance load transfer in the proximal region critical for long term fixation.  

September 2004

Adrey J, Ascencio G, Berteaux D, Essig J, Nourissat C, Walter W.L.

Presentation ABG Meeting, Nimes 2004 Sept

Hip Arthroplasty Survivorship.

ABG II PE cups (n=456) 100% survivorship  7.5 years - no osteolysis ABG II Ceramic cups (n=156) 100% survivorship  3 years - no osteolysis  

July 2004

Bitsakos C, Amis A.A, Charri

Bone Remodelling Simulation Around the ABG I and ABG II Hip Implants

Approximately 25% les resorption in Gruen zone 7 for the ABGII design compared to the original ABG design.  

2004

Panisello Sebastia J.J, Herrero Barcos L, Herrera Rodriguez A, Martinez Martin A, Canales Cortes

Submitted to Journal of Arthroplasty, pending

Changes in Periprosthetic Bone Remodelling Following ABG Stem Design. Densitometric Study

The ABG II stem, with strictly metaphyseal anchorage, achieves sufficient anchoring to transfer loads to the proximal femur and minimize bone loss through stress-shielding. The changes introduced to the ABG design appear to achieve effective metaphyseal anchoring  capable of transferring loads to the proximal femur. This implant (ABG II) appears particularly suitable for those women in whom one should avoid using large stems with more distal anchoring, which may lead to greater proximal bone atrophy, and for  women who are not good candidates for cemented implants.  

2004

Panisello J.J, Herrero L, Canales V,Herrera A, Martinez A.A, Cuenca J

Submitted to Journal of Arthroplasty

Periprosthetic Bone Remodelling Using An Uncemented Anatomic Femoral Stem. A Three Year Longitudinal Densitometric Study

ABG II stem can be considered to achieve efficient metaphyseal fixation, with load transmission to the proximal femur which minimizes bone atrophy at that level which represents sufficient stimulus for long term bone preservation in more distal areas  

April 2003

Garellick G, Herberts P, Malchau H

The Swedish National Hip Arthroplasty

Register Annual Report 2002

ABG I Stem & ABG II Cup Results

100% survivorship (109 cases  6 years)

Please refer to graph. #3

October 2003

Nevalainen J, Keinonen A, M

ABG HA + ABG II Cup Hip Prosthesis in Primary Arthrosis in 1996-2001, 90-100% Scale 99% survivorship (1859 cases  4 years)

Please refer to graph. #4

February 2003

Freedman L.S, Bolland B.J, Holloway I.P, Remedios D

British Hip Society, Belfast, Northern Ireland - Presentation

ABG II Uncemented Hydroxyapatite Coated Hip Arthroplasty: Clinical and Radiographic Results

100% survivorship for cup and stem (36 patients - 42 hips  7 years). Excellent average MDA score of 17.6

No radiological evidence of loosening of femoral nor acetabular components

2007

Patrick J Lusty and William L Walters

European Musculoskeletal Review 2007, Issue 1

August 2006

Joaquin Sanchez-Sotelo, George J. Haidukewych and Carol J. Boberg

J. Bone Joint Surg. Am. 88:290-294, 2006.

Hospital Cost of Dislocation After Primary THA

June 2006

Kuen Tak Suh, Jeong Han Kang, Hyoung Lok Roh, Kyu Pill Moon, and Hak Jin Kim, MDy

The Journal of Arthroplasty Vol. 21 No. 4 2006

True Femoral Anteversion During Primary Total Hip Arthroplasty

This study investigated a reference line that is closer to the true femoral anteversion on only the cutting surface of the proximal femoral neck during a femoral stem insertion in a cementless total hip arthroplasty.

This study has shown that anteversion using a midcortical line between the anterior cortical line and the posterior cortical line is compatible with the true femoral anteversion.

2005

Mark N. Charles, Robert B. Bourne, J. Roderick Davey, A. Seth Greenwald, Bernard F. Morrey, Cecil H. Rorabeck

AAOS Instructional Course Lectures, Volume 54, p. 131-141, 2005

Soft-Tissue Balanching of the Hip: The role of Femoral Offset Restoration

Inadequate soft-tissue balancing is a major yet often underemphasized cause of failure for primary and revision total hip arthroplasty. Therefore, it is important for orthopaedic surgeons to be familiar with the rationale, biomechanical principles, and clinical implications associated with soft-tissue balancing of the hip as well as strategies to avoid inadequate soft-tissue balancing and systematic techniques to restore adequate soft-tissue tensioning during total hip arthroplasty.

February 2005

A. Konyves, G. C. Bannister

Society of Bone and Joint Surgery, 2005;87-B:No.2, 155-7.

The importance of leg length discrepancy after total hip arthroplasty

We assessed leg length discrepancy and hip function in 90 patients undergoing primary total hip arthroplasty before surgery and at three and 12 months after. Function was measured using the Oxford hip score (OHS). After surgery the mean OHS improved by 26 points after three months and by 30 points after 12. After operation 56 (62%) limbs were long by a mean of 9 mm and this was perceived by 24 (43%) patients after three months and by 18 (33%) after 12. The mean OHS in patients who perceived true lengthening was 27% worse than the rest of the population after three months and 18% worse after 12. In 55 (98%) patients, lengthening occurred in the femoral component. Appropriate placement of the femoral component could significantly reduce a patient’s perception of discrepancy of length.

September 2005

Society of Bone and Joint Surgery,2005;87-B:No. 9, 1306-7

The importance of leg length discrepancy after total hip arthroplasty

Comments

September 2005

William L. Lanzer

ORTHOPEDICS 2005; 28:967

September 2005

James C Kudma

September 2005

Wayne M. Goldstein, Alexander Gordon, Jill Branson

September 2005

Christine S. Heim, A. Seth Greenwald

June 2004

William J. Maloney, MD, and James A. Keeney, MD

The Journal of Arthroplasty Vol. 19 No. 4 Suppl. 1 2004

Leg Length Discrepancy After Total Hip Arthroplasty

Restoration of hip biomechanics, including femoral offset and leg length are desired goals in performing total hip arthroplasty. Although leg length discrepancy cannot be eliminated after hip arthroplasty, it can be minimized  through a series of steps both preoperatively and intraoperatively. These include physical examination to determine true and apparent leg length, and radiographic evaluation to both assess leg length and to preoperatively template the surgical procedure. Finally, the preoperative plan needs to be executed in the operating room using appropriate intraoperative cues

Oktober 2003

K.-H. Widmer, B. Zurfluh

Journal of Orthopaedic Research 22 (2004) 815-821

January 2002

Takashi Sakai, Nobuhiko Sugano, Kenji Ohzono, Takashi Nishii, Keiji Haraguchi, and Hideki Yoshikawa

Journal of Orthopaedic Science, Volume 7, Number 1 / January 2002

June 2002

Robert B. Bourne, MD, FRCSC, and Cecil H. Rorabeck, MD, FRCSC

The Journal of Arthroplasty Vol. 17 No. 4 Suppl. 1 2002

Soft Tissue Balancing

Preoperative templating, intraoperative leg-length offset measurements, and the availability of high-offset femoral necks can improve the restoration of offset in 90% of patients.

2000

N.A. Ramaniraka, L.R. Rakotomanana, OP.J. Rubin, P.-F. Leyvraz

Revue de chirurgie orthopédique, 86, 590-597, 2000

Noncemented total hip arthoplasty: influence of extramedullary parametres on initial implant stability and on bone-implant interface stresses

The goal of this study were to analyze the effects of the extzra-medullary parameteres on the stability of a noncemented stem after a total hip replacement, and to evaluate the change of stress transfer

March 2000

Darryl D. D'Lima, Andrew G. Urquhart, Knute O. Buehler, Richard H. Walker

Journal of Bone and Joint Surgery Vol. 82-A, No. 3, 2000

The Effect of the Orientation of the Acetabular and Femoral Components on the Range of Motion of the Hip at Different Head-Neck Ratios

In this study, a computer model was used to determine the effects of the positions of the acetabular and femoral components and of varying head-neck ratios on impingement and range of motion.

Novemebr 1998

Andrew G. Urquuhart, Darryl D. D'Lima,Eric Venn Watson, Clifford W. Colweel, Richard Walker

Journal of Bone & Joint Surgery, VOL. 80-A, NO. 11,1998

Polyethylene Wear After Total Hip Arthroplasty: The Effect of a Modular Femoral Head with an Extended Flange-Reinforced Neck

The purpose of the current study was to evaluate the effect of a flange extension on polyethylene wear. The rate of polyethylene wear in the eleven hips in which the femoral component had a flange extension was significantly greater than that in the fifty-five in which the femoral component did not have a flange extension.