The age of patients ranged from 44 to 81 years, 64,63 ± 10,41 years on average. There was a predominance of females, with 14 cases (66.6%). The dominant limb was affected in 13 patients (59.1%).
The average follow-up time was 45,33 ± 42,20 months (minimum of 12 and maximum of 150 months).
Twenty Impol(r) brand prostheses were used (90.91%) one full Exactec(r) prosthesis (4.55%) and a partial DePuy [Johnson and Johnson](r) prosthesis (4.55%).
Fourteen partial arthroplasties (66.3%) were carried out, three of them cemented (21.4%) and eight total arthroplasties, all of them cemented (36.4%).
Primary OA was the most common etiology, as shown in . The arch of motion improved significantly when comparing the pre-and postoperative status, according to . The results of pre and postoperative evaluations (Constant, UCLA and VAS) can be seen in .
Comparison between the arch of movement and functional evaluations and pain in pre and postoperative situations.
Improvement was observed in all evaluations (p <0.001). Correlation was observed between the etiology of osteoarthritis (primary and secondary) and functional outcomes of UCLA and Constant scales (p = 0.0401 and p = 0.0273, respectively).
The description and statistical analysis of quantitative radiological parameters (distance between the top of the head and greater tubercle of the humerus, the distance between the top of the humeral head and the acromion, cervicodiaphyseal and offset medial) can be observed in and . There were no significant radiographic changes from pre to post-operatory, and when related to clinical scales as well, no significant difference was shown.
Evaluation of quantitative radiographic parameters in pre and postotoperative situations.
Spearman correlation between quantitative radiographic parameters and functional and pain scales.
The subluxation of the humeral head greater than or equal to 25% was observed in both shoulders (9.09%) in the preoperative period and in two other shoulders postoperatively. In either period, this parameter correlated with postoperative functional evaluations.
Regarding the slope of the humeral stem, the neutral position was present in nine shoulders (40.91%), valgus in nine shoulders (40.91%) and varus in four shoulders (18.18%), with no significant influence to the final functional outcome.
The erosion of the glenoid cavity was found in eight shoulders (36.36%) in the preoperative radiographs, and in four of them (50%) total arthroplasty was performed, while in the remaining four partial arthroplasty was done, with no statistical correlation with the final result.
The superior migration of the humerus occurred in seven shoulders (31.82%) in the postoperative period. The scales of UCLA and Constant were significantly different (p = 0.0480 and p = 0.0110, respectively) between the groups with and without this finding.
Radiographic signs indicating the risk of loosening of the prosthesis were found in three shoulders (13.64%). The mean follow-up of these patients was 103.18 months and no association was found with the cementing of the prosthesis or not.
In the comparative study between partial and total arthroplastyno significant difference regarding the scales Constant, UCLA and VAS (p> 0.5).