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-0266(02)00014-1 [14] Yu-Ping S., Matthew N.H., Wang, Wee-Ning C., Slotted Acetabular Augmentation in the Treatment of Painful Residual Dysplastic Hips in Adolescents and Young Adults, J Formos Medical Assosiation, 2008, 107, 720–727 http://dx.doi.org/10.1016/S0929-6646(08)60117-5 [15] Borut P., Vane A., Agles I., Anton J., Veronika K.I., Blanz M., How Should Dysplastic Human Hips Be Evaluated, Cell & Mol Bio Let., 2002, 7, 144–146 [16] Remzi T., Burak B., Nadir S., Total hip arthroplasty in the treatment of development dysplasia of the hip, Acta Orthop Trauma Turc., 2007, 41, 80

. Orthopedics , 21 , 991–992. Helkemaa, T., Hirvensalo, E., Huhtala, H., Remes, V. (2016). Patient injuries in primary total hip replacement. Acta Orthop ., 87 , 209–217. Henrich, C., Engelmaier, F., Mehling, I., Sauer, U., Kirschner, S., Martell, J. M. (2007). Cementless acetabular reconstruction and structural bone–grafting in dysplastic hips. Surgical technique. J. Bone Joint Surg. Amer ., 89 , 54–67. Kärrholm, J., Lindahl, H., Malchau, H., Mohaddes, M., Rogmark, C., Rolfson, O. (2016). The Swedish Hip Arthroplasty Register. Annual Report 2015 . Ola Rolfson

ABSTRACT

Total hip replacement is one of the most frequently performed orthopaedic interventions that can significantly improve the functional status and the quality of life of patients suffering from hip arthrosis. Recently patient satisfaction and patient-reported results of total hip arthroplasty are increasingly emphasised as important tools for the assessments of these interventions. For patients with arthrosis secondary to hip dysplasia, these evaluations can be more difficult, due to younger age and higher functional demands. In this study we compared the Visual Analogue Scale and the Harris Hip Score in order to determine the correlations between these instruments and analyse the possibility of replacing the Harris Score with the Visual Analogue Scale in evaluating the results of hip surgery in patients with dysplastic hips. Our study included 37 women and 4 men (53 hips), with a mean age of 50.96 years (35-58 years), followed for a mean of 4 years postoperatively. Both assessment instruments were used preoperatively and at the follow-up visits. We observed a positive correlation of the values of the Visual Analogue Scale and the Harris Hip Score both preoperatively and postoperatively, with correlation coefficients of +0.71(P <0.001) and +0.77 (P <0.001) respectively. Given these positive correlations, we assumed that the Visual Analogue Scale could replace the Harris Hip Score in the evaluation of patients after total hip replacement. Still it is recommended to combine the Visual Analogue Scale with objective measurements and radiological examination in order to identify significant postoperative changes.

-on-metal hip implants employing a metallic cup with a UHMWPE backing. Proc Inst Mech Eng [H] 2003 ; 217 : 207 –213. 10 Mak MM, Besong AA, Jin ZM, Fisher J. Effect of microseparation on contact mechanics in ceramic-on-ceramic hip joint replacements. Proc Inst Mech Eng [H] 2002 ; 216 : 403 –408. 11 Mak MM, Jin ZM. Analysis of contact mechanics in ceramic-on-ceramic hip joint replacements. Proc Inst Mech Eng [H] 2002 ; 216 : 231 –236. 12 Oki H, Ando M, Omori H, et al.: Relation between vertical orientation and stability of acetabular component in the dysplastic hip

effect on a dysplastic hip rather than on an healthy hip. From 1973 to 1991 in a review of S9O cases (1OO%) with dislocation * of the hip observed, we found 39 breech presentations at birth (13,5%); among these, IS (4%) cesarean sections were performed. Foetal US examination could be useful to study the dysplastic hip development. In fact, this examination has a good specificity, since it visualizes the whole hip. Our evaluation was based on more qualitative than quantitative data, according to Graf's angles. In fact, it is difficult to obtain a section plane according

–70. 4. Harris WH. Traumatic arthritis of the hip after dislocation and acetabular fractures: treatment by mold arthroplasty. An end-result study using a new method of result evaluation. J Bone Joint Surg Am. 1969; Jun; 51(4): 737–55. 5. Klisic P, Jankovic L. Combined procedure of open reduction and shortening of the femur in treatment of congenital dislocation of the hips in older children. Clin Orthop Rel Res. 1976; 119: 60–69. 6. Sponseller PD, McBeath AA. Subtrochanteric osteotomy with intramedullary fixation for arthroplasty of the dysplastic hip. A case report. J

tension so only small differences by choosing steel cables can be expected. However, for dynamic experi- ments steel cables would be inadequate. The patient demonstrated additional deformities, most markably varus deformity of the proximal femora, in con- trast to most dysplastic hips which are associated with valgus deformity w11x. The varus deformity might change hip mechanics; however, Salter osteotomy is only affect- ing the hip. The association of hip deformities with a cleft palate and cardiac abnormalities suggests an unknown syndrome which could alter muscular

of the socket. J Ar- throplasty 17 (2002) 359-364 [6] DiGioia, AM., Plakseychuk, AY., Levison, TJ., Jara- maz, B.: Mini-incision technique for total hip arthro- plasty with navigation. J Arthroplasty 18(2) (2003) 123-128 [7] Haaker, R., Tiedjen, K., Rubenthaler, F., Stockheim, M.: Computer-assisted navigated cup placement in primary and secondary dysplastic hips. Z Orthop 141(1) (2003) 105-111 [8] Hassan, DM., Johnston, GH,, Dust, WN., Watson, G., Dolovich, AT.: Accuracy of intraoperative assessment of acetabular prosthesis placement. J Arthroplasty 13 (1998) 80

) for adequate cement mantle has been allowed. In cases of dysplastic hips, the cups have been positioned in the anatomical position of the acetabulum. The cavity in the superior lateral part of the false acetabulum, which should be reproduced intraoperatively, was estimated for bone graft or cement coverage. Templating the femoral component took place as the desired stem was selected from the implant library; modifying the size and position was done till the stem layout adequately fit the femoral canal. Then, different offsets (standard or high) have been compared to

, Vanegas H, Natura G, Vazquez E, von Banchet GS. Joint pain. Exp Brain Res 2009;196:153–62. 10.1007/s00221-009-1782-9 19363606 Schaible HG Richter F Ebersberger A Boettger MK Vanegas H Natura G Vazquez E von Banchet GS Joint pain Exp Brain Res 2009 196 153 62 [58] Riser WH. The dog as a model for the study of hip dysplasia: growth, form, and development of the normal and dysplastic hip joint: introduction. Vet Pathol 1975;12:235–8. 10.1177/030098587501200402 Riser WH The dog as a model for the study of hip dysplasia: growth, form, and development of the normal and