2.Ceramic on Ceramic or Ceramic-on-polyethylene for Total Hip Arthroplasty: A Systemic Review and Meta-analysis of Prospective Randomized Studies.
Yu-Lei DONG ; Tao LI ; Ke XIAO ; Yan-Yan BIAN ; Xi-Sheng WENG
Chinese Medical Journal 2015;128(9):1223-1231
BACKGROUNDWear debris of polyethylene has become a restraining factor of the durability for total hip arthroplasty (THA). Ceramic on ceramic (COC) has better wear resistance while the squeaking sound and prosthesis fracture are of concern. It is still a controversy that bearing couples are better for THA.
METHODSWe performed a systematic review of all English articles identified from PubMed (1966-), Embase (1980-) and the Cochrane Library. Clinical outcomes, complications, revision rates, and radiographic outcomes of COC-THA and ceramic on polyethylene (COP)-THA were compared and evaluated.
RESULTSEight prospective randomized trials enrolling a total of 1508 patients and 1702 THA surgeries were identified. Our results demonstrated the prosthesis fracture and the squeaking sound is significantly higher in COC group and higher wear rate of the COP. Hip function, loosening rate, dislocation rate, revision rate, and the osteolysis rate were comparable between two groups. According to Grading of Recommendations Assessment, Development and Evaluation system assessment, the strength of evidence was high for prosthesis fracture, dislocation, osteolysis, and moderate for radiolucent line or loosening, hip noise, and revision.
CONCLUSIONSUp to now, there is insufficient evidence to identify any clinical advantage of COC compared with COP. Longer follow-up of larger randomized trial is needed to clarify the outcomes.
Arthroplasty, Replacement, Hip ; methods ; Ceramics ; therapeutic use ; Hip Prosthesis ; Humans ; Polyethylene ; therapeutic use
10.Randomized controlled trial of the absorbency of four dressings and their effects on the evaporation of burn wounds.
Jiong CHEN ; Chun-mao HAN ; Guo-liang SU ; Zhi-jian TANG ; Shi-jie SU ; Xiao-wei LIN
Chinese Medical Journal 2007;120(20):1788-1791
BACKGROUNDWound dressings are divided into traditional and new types. The new dressings are thought to accelerate wound healing. The purpose of this study was to supplement the scanty data on the absorbency of the new dressings and their effects on evaporation from the burn surface.
METHODSThe water absorption rate of four dressings (carbon fiber dressing, hydrogel dressing, silver nanoparticle dressing, and vaseline gauze) were measured by the immersion-weight gain method. A total of 120 inpatients with 10% superficial partial-thickness burn wounds were randomly assigned to four groups, each with 30 participants. Carbon fiber dressing, hydrogel dressing, and silver nanoparticle dressing were used in groups A, B, and C as the primary dressing, and traditional vaseline gauze was used in group D as the control. Multi-spot evaporation from normal skin and naked wound, and from wounds covered with each of the four dressings was measured post-burn on days 1, 3, 5, and 7 by an EP-I evaporimeter under conditions of 21 degrees C - 22 degrees C ambient temperature and 74% - 78% humidity.
RESULTSThe absorption rates of the four dressings were 988% with carbon fiber dressing, 96% with silver nanoparticle, 41% with vaseline gauze, and 6% with hydrogel. Evaporation from the naked burn wounds was about 1/3 higher than from normal skin (P < 0.01). Compared with wounds without applied dressing, evaporation from dressed wounds decreased and was time-dependent (P < 0.01). The evaporation of wounds with carbon fiber dressing was the lowest ((13.40 +/- 2.82) mlxh(-1)xm(-2), P < 0.01) on day 1 post-burn, compared with the other groups.
CONCLUSIONAll four dressings have water retention capacity while carbon fiber dressing has the highest absorption rate and shows the best containment and evaporation from the burn wound.
Adult ; Bandages ; Burns ; therapy ; Carbon ; therapeutic use ; Female ; Humans ; Hydrogel, Polyethylene Glycol Dimethacrylate ; therapeutic use ; Male ; Middle Aged ; Nanoparticles ; Petrolatum ; therapeutic use ; Silver ; therapeutic use ; Volatilization ; Wound Healing
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