Ceramic on Ceramic Bearings for Dysplastic Hips: Analysis of Uncemented 2,861 THAs

Kusaba, Atsushi; Asahi, Mariko; Hirano, Masamoto; Sunami, Hiroshi; Kondo, Saiji

doi:10.1615/jlongtermeffmedimplants.2020036091

Cited by 6 publications

(9 citation statements)

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“…The locations of the radiographic findings are described along Gruen's zone definition [17]. All the THA were performed through an anterolateral MIS procedure [1]. Neither navigation system nor image intensifier was used.…”

Section: Methodsmentioning

confidence: 99%

“…Neither navigation system nor image intensifier was used. Combined cups were R3 Cup (Smith & Nephew, Inc.) in all hips [1]. The length of SMF TM is about 20% shorter than that of other primary stems to preserve the bone stock [18].…”

Section: Methodsmentioning

confidence: 99%

Section: A Radiographic Evaluation Of Short Monolithic Femoral Hip St...mentioning

confidence: 99%

“…In Japan, which has the highest longevity in the world, the diagnosis that most often requires total hip arthroplasty (THA) is hip dysplasia [1]. Dysplastic patients are relatively young and have high activity [1] [2]. For such young and active patients, femoral bone preservation is an essential issue, considering the revision in the future [3] [4].…”

Section: A Radiographic Evaluation Of Short Monolithic Femoral Hip St...mentioning

confidence: 99%

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A Radiographic Evaluation of Short Monolithic Femoral Hip Stem (SMF) for Dysplastic Osteoarthritis: Does Stem Alignment Influence on the Stability?

Kikuchi¹,

Sunami²,

Oka³

et al. 2023

OJO

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Background: There have been a few reports of SMF TM stem for dysplastic hips. The aim of this study is to evaluate the influence of stem alignment in dysplastic femurs on the stability of the implants and on the bone reaction by means of consecutive radiographical analysis. Methods: The preoperative diagnosis is dysplastic osteoarthritis in all patients. Twenty-nine hips in 28 patients after MIS-THA were followed up for two or more years (3.5 years in average). The average age at the surgery was 60. Those who belonged to Crowe's classification I were 19 and those of II were 10 hips. The shape of the femur was classified as Dorr's Type A in 5, B in 21, and C in 3 hips. Results: The varus alignment of the stem was 21 hips and non-varus was 8 hips. Crowe's Grade did not have influence on the stem alignment. The ratio of non-varus alignment was more with Dorr's Type C than with others. Achieving rate of mediolateral fixation was significantly higher in the varus alignment than in non-varus. The significant subsidence occurred in 3 hips (10.3%) although all stems became stable within 6 months. No revision was necessary. Conclusion: The varus insertion of the stem seemed more secure also in dysplastic femurs, but even non-varus ones seemed acceptable as they brought about no severe problem. Comprehensively evaluating the result, careful selection of the patient is essential to take the advantage of and to overcome the disadvantage of this short stem for dysplastic hips.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: A Radiographic Evaluation Of Short Monolithic Femoral Hip St...mentioning

confidence: 99%

Section: A Radiographic Evaluation Of Short Monolithic Femoral Hip St...mentioning

confidence: 99%

See 2 more Smart Citations

A Radiographic Evaluation of Short Monolithic Femoral Hip Stem (SMF) for Dysplastic Osteoarthritis: Does Stem Alignment Influence on the Stability?

Kikuchi¹,

Sunami²,

Oka³

et al. 2023

OJO

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“…Four highly-experienced surgeons performed all THAs without a navigation system. All THAs were performed in the half lateral position (i.e., pelvis tilted 60 degrees relative to the floor) through a minimally invasive anterolateral approach independent of the implant type [ 19 , 20 ]. After an incision was made to the fascia lata at 0.5 mm posteriorly to the posterior border of the tensor fasciae latae muscle, the joint was approached between the gluteus medius muscle and the tensor fasciae latae muscle without damaging the muscles.…”

Section: Methodsmentioning

confidence: 99%

A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term

Sekita

Takahira

Iwamura³

et al. 2021

BMC Musculoskelet Disord

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Background Identifying populations with poor muscle recovery after total hip arthroplasty (THA) is important for postoperative physical therapy. Preoperative muscle strength is a strong factor that determines postoperative muscle strength. However, this effect may depend on other factors. Thus, predictive models with interaction terms are important for accurately predicting postoperative muscle strength. This study aimed to develop a predictive model for lower muscle strength 12 months after THA which incorporates interaction terms. Methods Subjects were female patients with hip osteoarthritis who underwent unilateral THA. Patients with locomotor disorders, neurological disorders, or postoperative complications were excluded. Hip abductor and knee extensor strength were measured, and a generalized linear model approach with preoperative muscle strength, age, body weight, height, disease duration, physical activity, and leg extension as explanatory variables was used to identify factors that determine muscle strength 12 months after THA. Models with interaction terms between preoperative muscle strength and other explanatory variables were also examined. Results A total of 82 patients were analyzed. Preoperative muscle strength, age, body weight, physical activity, and disease duration were extracted as factors that significantly and independently determine hip abductor and knee extensor strength. The interaction term between preoperative muscle strength and age was identified as a factor that significantly determines knee extensor strength. Regression coefficients for preoperative knee extensor strength and postoperative muscle strength were significant when age was +1 SD, but not when age was -1 SD. Conclusions The predictive model demonstrated that lower muscle strength 12 months after THA is determined by preoperative muscle strength, age, weight, physical activity, disease duration, and preoperative muscle strength, with the effect of preoperative muscle strength on knee extensor strength being dependent on age. When predicting postoperative knee extensor strength using preoperative muscle strength, it is important to consider the effect of age.

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Pressureless sintering behaviour of Al2O3/ZrO2 amorphous/solid solution powder with ultra-fine ZrO2 nanoparticle precipitation

Liu,

Yuan,

Wang

et al. 2023

Ceramics International

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Ceramic on Ceramic Bearings for Dysplastic Hips: Analysis of Uncemented 2,861 THAs

Cited by 6 publications

References 0 publications

A Radiographic Evaluation of Short Monolithic Femoral Hip Stem (SMF) for Dysplastic Osteoarthritis: Does Stem Alignment Influence on the Stability?

A Radiographic Evaluation of Short Monolithic Femoral Hip Stem (SMF) for Dysplastic Osteoarthritis: Does Stem Alignment Influence on the Stability?

A predictive model for hip abductor strength and knee extensor strength 12 months after total hip arthroplasty with an interaction term

Pressureless sintering behaviour of Al2O3/ZrO2 amorphous/solid solution powder with ultra-fine ZrO2 nanoparticle precipitation

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