Vet Comp Orthop Traumatol 2019; 32(01): 026-032
DOI: 10.1055/s-0038-1676296
Original Research
Georg Thieme Verlag KG Stuttgart · New York

Technique and Outcome of a Modified Tibial Plateau Levelling Osteotomy for Treatment of Concurrent Medial Patellar Luxation and Cranial Cruciate Ligament Rupture in 76 Stifles

Kathryn Flesher
1   Department of Surgery, Veterinary Specialists and Emergency Services, Rochester, New York, United States
Brian S. Beale
2   Department of Surgery, Gulf Coast Veterinary Specialists, Houston, Texas, United States
Caleb C. Hudson
2   Department of Surgery, Gulf Coast Veterinary Specialists, Houston, Texas, United States
› Author Affiliations
Further Information

Publication History

19 May 2018

01 August 2018

Publication Date:
15 January 2019 (online)


Objectives The main aim of this article is to describe the technique and outcome of a modified tibial plateau levelling osteotomy (TPLO) that simultaneously levels the tibial plateau and realigns the quadriceps mechanism through medial translation of the proximal tibial segment in dogs less than 15 kg.

Materials and Methods A retrospective medical records search identified dogs with concurrent cranial cruciate ligament rupture (CCLR) and medial patellar luxation (MPL). A study group (76 stifles) treated with a modified TPLO was compared with a non-tibial translation group (45 stifles) corrected with traditional surgical technique. Signalment, arthroscopic findings, adjunctive surgical procedures, osteotomy healing time and complications were recorded. Tibial plateau angle, proximal tibial segment medialization, width of the tibial osteotomy, mechanical medial proximal tibial angle and mechanical medial distal tibial angle were measured and recorded on preoperative and postoperative radiographs.

Results Overall complication rate was 18.4% in the treatment group and 28.9% in the non-tibial translation group. Reluxation occurred in 6.6% of cases in the study group and in 8.8% of cases in the non-tibial translation group. There was no statistical difference in healing time between groups.

Clinical Significance A modified TPLO can be used to treat patients with concurrent MPL and CCLR with good clinical outcome. Complication rates are comparable to traditional repairs for MPL. No major differences were appreciated between study and a non-tibial translation groups for variables compared.

Author Contribution

Kathryn Flesher contributed to study design, acquisition of data and data analysis and interpretation. Brian S. Beale contributed to conception of study, study design and acquisition of data. Caleb C. Hudson contributed to conception of study, study design, acquisition of data and data analysis and interpretation. All authors drafted, revised and approved the submitted manuscript.

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