Oliver Chibage v Kudzai Sibusiso Ndawana

The plaintiff, a Commissioner in the Zimbabwe Republic Police, consulted the defendant, a dental surgeon and fellow police member, in June 2007 complaining of tooth sensitivity. The defendant examined him and discovered an embedded molar that required extraction. During a lengthy extraction procedure at the defendant's surgery lasting approximately 2.5 hours, the plaintiff experienced severe pain. The defendant referred him to Professor Chidzonga, a specialist, who successfully extracted the tooth in approximately 20 minutes and discovered the plaintiff had suffered a fractured jaw. The plaintiff was subsequently flown to South Africa for further treatment where the fracture was reduced using bracelets and he underwent physiotherapy. The plaintiff sued the defendant claiming R10,000 for pain and suffering, R10,000 for loss of comfort, and R78,000 as special damages, alleging the defendant negligently fractured his jaw during the extraction procedure.

• Whether the defendant fractured the plaintiff's jaw during the tooth extraction procedure
• Whether the defendant owed a duty of care to the plaintiff in contract and/or delict
• Whether the defendant was negligent in performing the tooth extraction
• What is the appropriate test for establishing professional negligence of a medical practitioner
• Whether the plaintiff proved damages caused by the defendant's conduct
• Whether novus actus interveniens broke the chain of causation

The defendant was absolved from the instance. Each party was ordered to bear its own costs.

To establish professional medical negligence, a plaintiff must prove: (1) that the defendant owed a duty of care (which may arise in contract or delict); (2) that the defendant breached that duty by deviating from the standard of care expected of a reasonable professional in their field; (3) causation - that the defendant's breach factually and legally caused the plaintiff's injuries; and (4) damages. The standard of care must be established through expert evidence showing what an average reasonable professional (not an expert or specialist) would have done in similar circumstances. The mere occurrence of an adverse outcome during a medical procedure does not, without more, establish negligence. Subsequent medical interventions may constitute novus actus interveniens breaking the chain of legal causation, particularly where those interventions become the direct and active cause of subsequent harm or expenses.

The court observed that South African law recognizes concurrent actions in contract and delict where the same facts give rise to both causes of action, allowing plaintiffs to choose which to pursue. The court noted that cases of professional negligence are particularly difficult to prosecute successfully in jurisdictions where professions are small and closely knit, as members may be reluctant to testify against colleagues, viewing such testimony as itself unprofessional. The court also commented that while the plaintiff's case had merit from a layperson's perspective (no one expects a fractured jaw from a tooth extraction), the law requires application of professional standards rather than lay expectations. The judge expressed sympathy for the plaintiff's reasonable approach in seeking legal redress, which informed the decision not to award costs against him despite his unsuccessful claim.

This case is significant in Zimbabwean jurisprudence (which shares common law principles with South African law) for clarifying the evidentiary requirements in medical negligence cases. It establishes that: (1) the plaintiff bears the burden of proving both causation and negligence on a balance of probabilities; (2) expert evidence is essential to establish the standard of care expected of a reasonable professional in the defendant's position; (3) the test for professional negligence requires comparison with peers' standards, not lay expectations; (4) the occurrence of an adverse medical outcome does not give rise to an inference of negligence (rejecting res ipsa loquitur in this context); and (5) novus actus interveniens by subsequent medical practitioners can break the chain of causation. The judgment also illustrates the practical difficulties of prosecuting professional negligence claims where professional witnesses are reluctant to testify against peers, and demonstrates judicial recognition of this challenge through the costs order.