Canine hip dysplasia (CHD) is a developmental malformation of the hip joints; the major laxity of the hip joint is characterized by subluxation of the femoral head out of the acetabulum. Radiographic evaluation and clinical examination were evaluated in dogs having undergone pectinectomy as the only treatment of CHD. Twenty patients of various breeds with pectinectomy were classified, and their respective pre- and post-surgical radiographs, according to the time in which surgery was performed, dividing them into four groups: G1 (6 months to 1 year), G2 (1–2 years), G3 (2–3 years), G4 (>3 years). During these times, comparative study was conducted, pre- and post-surgical through radiological evaluation, according to the Fédération Cynologique Internationale (FCI) and the presence or absence of clinical signs. Groups were compared by a Kruskal-Wallis test followed by Dunnett's test for post-hoc comparisons; significance was set at p<0.05. None of the patients showed an increase in joint degenerative disease in the comparative radiographic study (p>0.05). The Norberg angle measurement showed that the pectinectomy stops the advance of articular disease; 90% kept a constant degree, and 2 10% had decreased the dysplasia degree. The owners described a high improvement in quality of life. Post-surgery recuperation in relation to physical exercise was highly significant, almost immediate, and didn't change during the time. Pain and muscular mass improved in all the 20 dogs, as indicated by the owners and at the clinical examination performed. Pectinectomy improves patient quality of life, stops joint degenerative disease and the hip dysplasia degree.