Tissue response to porous-coated implants lacking initial bone apposition

Sandborn, Patricia M.; Cook, Stephen D.; Spires, Walter P.; Kester, Marcus A.

doi:10.1016/s0883-5403(88)80034-2

Cited by 95 publications

(49 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Bone ingrowth into cementless prosthetic components is difficult because of the gap between the prosthesis and the surrounding bone. Examination of the histological sections and corresponding microradiographs clearly demonstrated that direct contact between bone and prosthesis increased the osseous response to the implants (Bobyn et al, 1981;Cook et al, 1988;Dalton et al, 1995;Lind et al, 1996;Sandborn et al, 1988). Dalton et al(1995) evaluated the mechanical and histological response to femoral intramedullary implants with different gaps in dogs.…”

Section: Discussionmentioning

confidence: 99%

“…Regression analyses suggested that mechanical strength and bony ingrowth increased significantly with decreased initial gap size (P<0.001) and interface gap (P<0.001), respectively. Sandborn et al(1988) evaluated uni-form gaps of 0.0, 0.25, 0.5, 1.0 and 2.0 millimetres in a study of femoral intramedullary implants in adult dogs. Substantial bony ingrowth was found in the gaps 0.5 mm or less, while in the 2.0 mm gaps, only limited, poorly organised bony ingrowth occurred at 12 weeks.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The dimensional accuracy of preparation of femoral cavity in cementless total hip arthroplasty

Hahne

Hassenpflug

2004

J. Zheijang Univ.-Sci.

View full text Add to dashboard Cite

Abstract:Objective: To observe the accuracy of femoral preparation and the position of the cementless prosthesis in femoral cavity, and to compare the results between the computer-assisted surgical group (CASPAR) and the conventional group. Methods: Ten femoral components were implanted either manually or by CASPAR in cadaver femurs. The specimens were cut to 3 mm thick slices. Microradiograms of every slice were sent to a computer for analysis with special software (IDL). The gaps and the medullary cavities between component and bone, the direct bone contact area of the implant surface, the gap width and the percentage of gap and bone contact area were measured in every slice. Results: In the proximal implant coated with HA of the CASPAR group, the average percentage of bone contact reached 93.2% (ranging from 87.6% to 99.7%); the average gap percentage was 2.9% (ranging from 0.3% to 7.8%); the maximum gap width was 0.81 mm and the average gap width was only 0.20 mm. While in the conventional group, the average percentage of bone contact reached 60.1% (ranging from 49.2% to 70.4%); the average gap percentage was 32.8% (ranging from 25.1% to 39.9%); the maximum gap width was 2.97 mm and the average gap width was 0.77 mm. The average gap around the implant in the CASPAR group was only 9% of that in the manual group; the maximum and average gap widths were only about 26% of those in the manual group. On the other hand, the CASPAR group showed 33% higher bone contact than the manual group. Conclusion: With the use of robotics-assisted system, significant progress can be achieved for femoral preparation in total hip arthroplasty.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The dimensional accuracy of preparation of femoral cavity in cementless total hip arthroplasty

Hahne

Hassenpflug

2004

J. Zheijang Univ.-Sci.

View full text Add to dashboard Cite

show abstract

“…The demonstrated spring back of compacted bone may play an important role in reducing gaps that often exist clinically between the implant and the cancellous bone bed (Schimmel andHuiskes 1988, Paul et al 1992). The reduction in gaps between implant and bone might also be beneficial because more extensive and better organized bony ingrowth has been observed the closer an implant comes to initial direct apposition to the bone surface (Sandborn et al 1988). …”

Section: Discussionmentioning

confidence: 99%

Compacted cancellous bone has a spring-back effect

Kold

Bechtold

Ding

et al. 2003

Acta Orthopaedica Scandinavica

View full text Add to dashboard Cite

“…Typical of noncemented THR is the failed-bonding scenario, which implies that ingrowth-or osseous integration-does not occur, due to gaps and relative motions at the implant-bone interface (Sandbom et al 1988, Engh and Massin 1989, Soballe et al 1992). The biological bonding or ingrowth processes require a certain degree of quiescence at the interface to succeed (Figure 4).…”

Section: Failed Bondingmentioning

confidence: 99%