Double-tapered conical taper in primary and revision surgery: rationale and short-term follow-up

Loris Perticarini, Mario Mosconi, Marta Medetti, Laura Caliogna, Francesco M. Benazzo

Research output: Contribution to journalArticle

Abstract

Background: The new double-conical tapered stem is a novel cementless modular system, which is indicated for both primary and revision surgeries. It has been designed with different angles at the proximal (5°) and distal sections (1° 36’) in order to obtain optimal fixation by proximal and distal fit and fill of the femoral canal. Aim: The aim of this prospective study was to evaluate the short-term clinical and radiographic outcomes of primary and revision hip surgery with the new double-conical stem. Methods: 61 stems were implanted (December 2013 to September 2016) in 42 cases of primary and in 19 cases of revision surgery. The mean age of patients was 64.7 (17–94; standard deviation [SD] 21.9) years. Results: The mean body mass index of the patients was 24.6 (17–34.6). In 3 cases of developmental dysplasia of the hip we performed femoral shortening osteotomy. The mean follow-up was 26 (8–40) months. 3 patients died due to causes unrelated to surgery. Postoperative complications included 3 hip dislocations, 2 infections and 1 case of stem explant for metastatic tumour. For all other cases, at the last follow-up radiographs showed no loosening, no radiolucent lines nor subsidence. The mean Harris Hip Score significantly improved from 45 (range 35–58) preoperatively to 87 (range 75–94). Leg length discrepancy was found in 10% of cases but never >1 cm. Conclusions: Radiographic analysis showed the bone-stem contact full at 2 levels of taper. The double-tapered prosthetic stem can therefore be usefully employed both in primary and in revision surgeries.

Original languageEnglish
Pages (from-to)73-77
Number of pages5
JournalHIP International
Volume28
Issue number2_suppl
DOIs
Publication statusPublished - Nov 1 2018

Fingerprint

Reoperation
Hip Dislocation
Thigh
Hip
Osteotomy
Leg
Body Mass Index
Prospective Studies
Bone and Bones
Infection
Neoplasms

Keywords

  • Conical stem
  • DDH
  • double-tapered stem
  • modular implant
  • revision hip

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

Double-tapered conical taper in primary and revision surgery : rationale and short-term follow-up. / Perticarini, Loris; Mosconi, Mario; Medetti, Marta; Caliogna, Laura; Benazzo, Francesco M.

In: HIP International, Vol. 28, No. 2_suppl, 01.11.2018, p. 73-77.

Research output: Contribution to journalArticle

@article{b5680ab6771b47e2a148ebef5de7b5ed,
title = "Double-tapered conical taper in primary and revision surgery: rationale and short-term follow-up",
abstract = "Background: The new double-conical tapered stem is a novel cementless modular system, which is indicated for both primary and revision surgeries. It has been designed with different angles at the proximal (5°) and distal sections (1° 36’) in order to obtain optimal fixation by proximal and distal fit and fill of the femoral canal. Aim: The aim of this prospective study was to evaluate the short-term clinical and radiographic outcomes of primary and revision hip surgery with the new double-conical stem. Methods: 61 stems were implanted (December 2013 to September 2016) in 42 cases of primary and in 19 cases of revision surgery. The mean age of patients was 64.7 (17–94; standard deviation [SD] 21.9) years. Results: The mean body mass index of the patients was 24.6 (17–34.6). In 3 cases of developmental dysplasia of the hip we performed femoral shortening osteotomy. The mean follow-up was 26 (8–40) months. 3 patients died due to causes unrelated to surgery. Postoperative complications included 3 hip dislocations, 2 infections and 1 case of stem explant for metastatic tumour. For all other cases, at the last follow-up radiographs showed no loosening, no radiolucent lines nor subsidence. The mean Harris Hip Score significantly improved from 45 (range 35–58) preoperatively to 87 (range 75–94). Leg length discrepancy was found in 10{\%} of cases but never >1 cm. Conclusions: Radiographic analysis showed the bone-stem contact full at 2 levels of taper. The double-tapered prosthetic stem can therefore be usefully employed both in primary and in revision surgeries.",
keywords = "Conical stem, DDH, double-tapered stem, modular implant, revision hip",
author = "Loris Perticarini and Mario Mosconi and Marta Medetti and Laura Caliogna and Benazzo, {Francesco M.}",
year = "2018",
month = "11",
day = "1",
doi = "10.1177/1120700018812990",
language = "English",
volume = "28",
pages = "73--77",
journal = "HIP International",
issn = "1120-7000",
publisher = "Wichtig Publishing",
number = "2_suppl",

}

TY - JOUR

T1 - Double-tapered conical taper in primary and revision surgery

T2 - rationale and short-term follow-up

AU - Perticarini, Loris

AU - Mosconi, Mario

AU - Medetti, Marta

AU - Caliogna, Laura

AU - Benazzo, Francesco M.

PY - 2018/11/1

Y1 - 2018/11/1

N2 - Background: The new double-conical tapered stem is a novel cementless modular system, which is indicated for both primary and revision surgeries. It has been designed with different angles at the proximal (5°) and distal sections (1° 36’) in order to obtain optimal fixation by proximal and distal fit and fill of the femoral canal. Aim: The aim of this prospective study was to evaluate the short-term clinical and radiographic outcomes of primary and revision hip surgery with the new double-conical stem. Methods: 61 stems were implanted (December 2013 to September 2016) in 42 cases of primary and in 19 cases of revision surgery. The mean age of patients was 64.7 (17–94; standard deviation [SD] 21.9) years. Results: The mean body mass index of the patients was 24.6 (17–34.6). In 3 cases of developmental dysplasia of the hip we performed femoral shortening osteotomy. The mean follow-up was 26 (8–40) months. 3 patients died due to causes unrelated to surgery. Postoperative complications included 3 hip dislocations, 2 infections and 1 case of stem explant for metastatic tumour. For all other cases, at the last follow-up radiographs showed no loosening, no radiolucent lines nor subsidence. The mean Harris Hip Score significantly improved from 45 (range 35–58) preoperatively to 87 (range 75–94). Leg length discrepancy was found in 10% of cases but never >1 cm. Conclusions: Radiographic analysis showed the bone-stem contact full at 2 levels of taper. The double-tapered prosthetic stem can therefore be usefully employed both in primary and in revision surgeries.

AB - Background: The new double-conical tapered stem is a novel cementless modular system, which is indicated for both primary and revision surgeries. It has been designed with different angles at the proximal (5°) and distal sections (1° 36’) in order to obtain optimal fixation by proximal and distal fit and fill of the femoral canal. Aim: The aim of this prospective study was to evaluate the short-term clinical and radiographic outcomes of primary and revision hip surgery with the new double-conical stem. Methods: 61 stems were implanted (December 2013 to September 2016) in 42 cases of primary and in 19 cases of revision surgery. The mean age of patients was 64.7 (17–94; standard deviation [SD] 21.9) years. Results: The mean body mass index of the patients was 24.6 (17–34.6). In 3 cases of developmental dysplasia of the hip we performed femoral shortening osteotomy. The mean follow-up was 26 (8–40) months. 3 patients died due to causes unrelated to surgery. Postoperative complications included 3 hip dislocations, 2 infections and 1 case of stem explant for metastatic tumour. For all other cases, at the last follow-up radiographs showed no loosening, no radiolucent lines nor subsidence. The mean Harris Hip Score significantly improved from 45 (range 35–58) preoperatively to 87 (range 75–94). Leg length discrepancy was found in 10% of cases but never >1 cm. Conclusions: Radiographic analysis showed the bone-stem contact full at 2 levels of taper. The double-tapered prosthetic stem can therefore be usefully employed both in primary and in revision surgeries.

KW - Conical stem

KW - DDH

KW - double-tapered stem

KW - modular implant

KW - revision hip

UR - http://www.scopus.com/inward/record.url?scp=85059239401&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059239401&partnerID=8YFLogxK

U2 - 10.1177/1120700018812990

DO - 10.1177/1120700018812990

M3 - Article

AN - SCOPUS:85059239401

VL - 28

SP - 73

EP - 77

JO - HIP International

JF - HIP International

SN - 1120-7000

IS - 2_suppl

ER -