The traditional bone-setter's method, what the published outcome studies actually show about which injuries he treats well and which he maims, why patients keep going to him anyway, and the current argument about training rather than banning him.
Traditional bone-setting is the part of Yoruba medicine where the evidence is best, and the evidence is uncomfortable in both directions. It is the only major specialism for which there is a substantial published outcome literature, including a systematic review covering 1,389 patients and 1,470 complications . That literature shows real harm at scale, including amputations that need not have happened. It also shows something the harm figures alone do not: that the bone-setter treats the majority of fractures in Nigeria, that his results are acceptable for some injury types, and that the alternative available to most of his patients is not an orthopaedic surgeon but nothing.
Confidence on this file is marked high, which is unusual in this section. That is because the claims here rest on hospital-based outcome studies with counted patients rather than on ethnography or on practitioner report.
The onímọ̀-egúngun or traditional bone-setter, the ọ̀gbẹ́ni egungun in some usages, treats fractures, dislocations, sprains and other musculoskeletal injury. The core of the method is manipulation to reduce the deformity, followed by immobilisation with splints, usually bamboo or wooden slats, bound with cloth or cord, together with topical applications of herbal preparations and massage. Treatment is prolonged and involves repeated re-binding, often over weeks or months, and payment is frequently staged across the episode.
The practice is transmitted within families by informal apprenticeship from relatives, with no formal training structure and no curriculum . There is no accrediting body. The 2011 review of the Nigerian literature summarises the position bluntly: the origin of the practice is obscure, it passes from one generation to another, and there is no formal training of bone-setters .
Scale of complications. The systematic review by Onyemaechi and colleagues in Tropical Medicine and International Health followed PRISMA methodology, screened 176 papers, included 15 hospital-based observational studies published between 1986 and 2018, and covers 1,389 participants presenting to orthopaedic services with 1,470 complications of traditional bone-setter treatment . Its conclusion is stated in two halves and both belong in any honest account: traditional bone-setting complications are associated with significant morbidity, and traditional bone-setters have the potential to contribute positively to primary fracture care when they are trained .
The complications themselves. The major ones recorded across the Nigerian literature are malunion, nonunion, traumatic osteomyelitis and limb gangrene . One Nigerian outcome study reported treatment adjudged satisfactory by 49.0 percent of patients, fair by 40.8 percent and unsatisfactory by 10.2 percent, with complications including pain, malunion or nonunion, joint stiffness and contractures occurring in 61.2 percent . In one hospital comparison, over half of the traditional bone-setter subgroup had malunion and a quarter had nonunion .
Gangrene and amputation are the signature harm. The 2011 review identifies extremity gangrene as the worst outcome of the practice, and frames the case for training around preventing the most debilitating outcomes, amputation among them . This is not a rare complication reported for effect; it is the reason orthopaedic surgeons in Nigeria write about traditional bone-setting at all.
The mechanism is understood. Tight circumferential splinting over a swelling limb produces compartment syndrome and vascular compromise, which produces gangrene, which produces amputation. Open wounds bound under herbal dressings without debridement produce osteomyelitis. Fractures reduced by feel and held without imaging heal in the position they were left, which produces malunion. Each documented complication has a straightforward mechanical explanation, and the explanation points directly at what training would have to change.
The single most useful finding in this literature is that outcomes are not uniform across injury types.
Outcomes are good for closed fractures of the shafts of the humerus, ulna, radius and tibia. They are poor for peri-articular fractures and for open fractures .
That distribution is coherent and it is worth spelling out, because it is what separates an evidence-led account from a dismissal. A closed shaft fracture largely needs to be held still while it heals. Immobilisation is precisely what the traditional bone-setter provides, and he provides it cheaply, locally, and with continuity of care over the whole healing period. An open fracture needs wound debridement, infection control and often internal fixation. A fracture into a joint needs anatomical reduction to within a millimetre or two, which cannot be achieved by palpation. These are exactly the injuries where his results are bad, and the reason is not that he is careless but that the procedures required are not available to him.
The correct summary is therefore not that traditional bone-setting is dangerous. It is that traditional bone-setting is reasonable for a subset of injuries and dangerous for another subset, that the bone-setter has no reliable way to tell which is which without radiography, and that he treats both.
This is where accounts written from inside the hospital tend to go wrong, and the survey data correct them.
A study of 120 patients in Makurdi who had been treated by traditional bone-setters before presenting to hospital recorded the reasons: advice of relatives and friends was the commonest at 29.2 percent, followed by cheaper cost at 25 percent, sociocultural belief at 14.2 percent, easy accessibility at 12.5 percent, fear of amputation at 10.8 percent and fear of operation at 8.3 percent . None of these factors correlated with age, marital status, occupation or educational status .
Two things in that list deserve attention.
The largest single driver is social, not ideological. People go where their relatives send them. Only 14.2 percent gave sociocultural belief as the reason, which is a much smaller figure than the "they believe in traditional medicine" account predicts.
Fear of amputation and fear of operation together account for nearly a fifth. Patients go to the bone-setter partly to avoid the surgeon who they fear will cut the limb off. The tragedy embedded in that finding needs no elaboration: avoidance of amputation is among the reasons patients choose the treatment that most reliably causes it.
The same study found that patients largely lose confidence after the experience. Asked about the outcome of the treatment they had received, none rated it very satisfactory, 20 percent said satisfactory but with deficiencies, 66.7 percent said unsatisfactory and 13.3 percent had no opinion . Asked about the practice generally, 35 percent thought bone-setters not useful and 25 percent a nuisance, against 31.7 percent useful and 8.3 percent indispensable .
That is a patient population with a low opinion of a service it continues to use, which is the signature of a market with no alternative rather than of a cultural preference. Note also the selection problem in that study, and in the outcome literature generally: these are patients who presented to hospital after traditional treatment, which means they are enriched for treatment failure. Patients whose fractures healed acceptably never enter the sample. The complication studies measure the harm accurately and cannot measure the base rate of success at all.
The volume is real. In a five-year multi-centre study of 4,216 missile and blast injury patients in southeastern Nigeria, 772 patients, 18.3 percent, signed against medical advice and went to traditional bone-setters . These were patients already in a teaching hospital with gunshot injuries who chose to leave.
The tradition includes cutting, but it is important not to overstate what that means.
The olola is the specialist in cutting, and his documented work is circumcision, facial marks (ilà) and scarification . That is skilled and standardised cutting of skin, performed at scale, and it is a genuine surgical craft in the narrow sense.
Beyond this, the record does not support claims of a developed Yoruba surgical tradition. There is no documented practice of laparotomy, of internal fixation, or of operative management of fracture. Incision for abscess drainage and the making of shallow cuts for the administration of medicine, a routine route of administration described in file 01, are within the repertoire. The limiting factors are the ones that limited surgery everywhere before the late nineteenth century: no anaesthesia beyond what plant material and alcohol provide, no antisepsis, no control of haemorrhage, and no means of managing infection once it starts. Claims about extensive traditional African surgery circulate, and where they concern Yoruba practice specifically this compiler found no supporting evidence and does not repeat them.
The argument has moved decisively away from suppression, and the reason is arithmetic rather than sentiment. Traditional bone-setters provide the majority of primary fracture care in Nigeria . There are not enough orthopaedic surgeons to replace them and there will not be within any planning horizon. A policy of prohibition would remove the only accessible provider for most fracture patients and would not be enforceable in any case.
The feasibility work. Onyemaechi and colleagues conducted focus groups with five traditional bone-setters and eight orthopaedic surgeons in Enugu . The findings: bone-setters acquired their skills through informal apprenticeship from relatives, recognised the need to formalise their training, and were willing to accept training support from orthopaedists; the orthopaedists recognised that bone-setters fill a gap created by the shortage of surgeons and were willing to provide training . The authors conclude that formal training of bone-setters by orthopaedic surgeons is feasible, and that this is critical for integrating them into the primary health care system as orthopaedic technicians . The 2011 review reaches the same place from the outcome side: where training has been attempted, improvement in performance has been noted .
The first trial evidence. A pilot stepped-wedge cluster-randomised controlled trial of collaborative triage and treatment with traditional bone-setters for extremity fracture patients ran in rural Tanzania between August 2023 and April 2024, with 21 intervention and 31 control patients, and was published in BMJ Global Health in November 2025 . This is not Nigeria and not Yoruba practice, and it should be cited with that caveat, but it is the first randomised evidence on the question anywhere. Its findings: protocol adherence was 66.7 percent in the intervention group, with prohibitive cost and fear of surgery the commonest reasons for non-adherence; mean satisfaction, quality of life and disability did not differ statistically between groups; intervention patients had 0.072 fewer complications than controls, a number needed to treat of 13.9 to prevent one complication; and the authors conclude that collaborative fracture management is acceptable and safe to patients and to bone-setters and offers a model for resource-limited settings .
Read that trial carefully. It is small, it is a pilot, the confidence around a difference of 0.072 complications per patient in 52 patients is wide, and it shows no difference in the outcomes patients care most about. What it establishes is feasibility and acceptability rather than effectiveness. It is a beginning, not a result.
What integration would have to change. The mechanisms of harm identified above point at a short and specific list: do not bind circumferentially over a swelling limb; recognise and refer open fractures; recognise and refer fractures involving joints; recognise the signs of compartment syndrome and vascular compromise and refer immediately; and have somewhere to refer to. The last item is the one that is not in the bone-setter's gift, and it is why training programmes that are not accompanied by functioning referral pathways address only half of the problem.
Traditional bone-setting causes documented, serious, preventable harm including limb loss, and this is established by counted outcomes rather than asserted . It is nonetheless the principal source of fracture care in Nigeria and its results are acceptable for closed shaft fractures, which are a large share of all fractures . The published direction of travel among Nigerian orthopaedic surgeons, who see the complications, is towards training and integration rather than prohibition, and the first randomised evidence supports the acceptability of that approach without yet demonstrating its effectiveness .
Any account that reports only the gangrene figures, or only the access argument, is reporting half of a literature that says both.
What the Yoruba word for medicine covers, how physical and spiritual causation work together inside one diagnostic act rather than in separate compartments, and why calling this system "traditional" as opposed to "scientific" describes it wrongly.
What is actually being researched now, how Nigeria regulates traditional medicine and where the regulation stops, who owns knowledge that becomes a drug, and the contamination data that make the contemporary trade a public health problem in its own right.
What traditional birth attendants do and what the outcome evidence shows, the real demographic explanation for the Yoruba twinning rate and what it is not, infant care practice, and an honest division between what helps, what is neutral and what kills.
The knowledge system of the onisegun, the categories of oogun, what pharmacological research has and has not confirmed about Yoruba herbal medicine, and the specialist practitioners.
Who actually practises Yoruba medicine, how the specialisms divide, how a practitioner is trained and how long it takes, and how expertise is checked among practitioners themselves rather than by any outside body.
The scale of the documented Yoruba pharmacopoeia, how plants are classified and named, the tonal wordplay that makes a plant's name a mnemonic for its use, and a worked table of named plants against what pharmacological research has and has not established.