Torus Mandibularis and Palatinus Bone Removal Surgery

Understanding Torus Palatinus and Torus Mandibularis

A torus is a benign, non-neoplastic, slow-growing exostosis consisting of dense cortical bone with a minimal trabecular core. When situated along the midline of the hard palate, it is designated as a torus palatinus; when located on the lingual (tongue-facing) aspect of the mandible, typically above the mylohyoid line adjacent to the premolar and canine teeth, it is termed a torus mandibularis. These bony projections represent physiological anatomical variations rather than pathologies, occurring in a significant proportion of the global population with notable ethnic and geographical variation.

Histologically, oral tori consist of mature, highly mineralised lamellar bone covered by a remarkably thin layer of overlying mucoperiosteum (mucous membrane and fibrous periosteum). Torus palatinus often presents as flat, nodular, spindle-shaped, or lobulated masses, whereas mandibular tori frequently present bilaterally as smooth, rounded nodules. Because these bony structures are avascular relative to the surrounding soft tissues and covered by a delicate, attenuated mucosal envelope, they possess limited capacity to resist physical trauma and require careful management when intervention is necessary.

Causes and Contributing Risk Factors

The aetiology of tori is multifactorial, involving an intricate interplay between dynamic functional forces and genetic predisposition. Genetic studies demonstrate an autosomal dominant inheritance pattern with variable penetrance, explaining why tori frequently aggregate within families. In addition to inherited factors, masticatory hyperfunction (excessive chewing stress) is a primary mechanical trigger. Parafunctional habits such as bruxism (involuntary teeth grinding or clenching) place sustained mechanical loads on the alveolar processes, stimulating the osteoblasts (bone-forming cells) in the periosteum to deposit additional lamellar bone as a structural adaptation.

Dietary and lifestyle factors also play a notable role. Diets requiring vigorous mastication, as well as the consumption of calcium-rich foods or betel nut and tobacco products in specific regional cohorts, such as parts of South Asia, are associated with altered masticatory stress and local bony remodelling. The prevalence of mandibular tori is significantly higher in individuals displaying severe tooth wear facets, secondary to occlusal friction. Although tori can develop during late adolescence, they most commonly expand throughout young to middle adulthood, stabilizing once bone maturity and functional equilibrium are reached.

Clinical Presentation and Common Symptoms

The vast majority of oral tori remain entirely asymptomatic and are identified incidentally during routine dental or maxillofacial examinations. However, as these bony outgrowths enlarge, their physical dimensions can disrupt normal oral physiology. Because the overlying mucosal tissue is stretched taut over dense bone, it lacks a substantial protective submucosal cushion. Consequently, patients frequently experience recurrent mucosal ulcerations, abrasions, and chronic tenderness triggered by the consumption of hard, sharp, or hot foods, which take longer to heal due to reduced local vascular supply.

Large tori may also cause functional limitations. A voluminous torus palatinus can alter speech articulation (phonetics), particularly the clear production of palatolingual consonants, and create a subjective sensation of restricted oral volume during swallowing (dysphagia). Large mandibular tori may crowd the tongue, displacing it superiorly or posteriorly, and can create deep sub-torus undercuts. These undercuts trap food particles and debris, complicating routine plaque control, which can precipitate localized gingivitis, halitosis (chronic bad breath), and periodontitis along adjacent tooth surfaces.

Diagnostic Evaluation and Differential Diagnosis

Diagnosis begins with a thorough clinical examination, utilizing visual inspection and bimanual palpation. A torus is characterised by an immobile, rock-hard, non-fluctuant mass that is fixed to the underlying skeletal base, typically with a smooth or lobulated mucosal covering devoid of erythema or ulceration unless mechanically irritated. Diagnostic imaging is routinely performed to confirm clinical findings and assess anatomical relationships. Standard intraoral periapical radiographs and panoramic radiographs reveal well-circumscribed radiopaque (dense white) shadows superimposed on dental roots or the palate, excluding internal radiolucent (destructive) changes.

When planning surgical reduction, Cone Beam Computed Tomography (CBCT) provides precise three-dimensional evaluation. CBCT delineates the proximity of the torus to vital structures, including adjacent tooth roots, the incisive canal, the floor of the nasal cavity, and the sublingual fossa. It is essential to differentiate tori from more concerning bony or soft-tissue lesions. The differential diagnosis includes osteomas, osteochondromas, ossifying fibromas, fibrous dysplasia, and salivary gland neoplasms (such as pleomorphic adenomas of the minor palatal glands). Unlike true neoplasms, tori exhibit static or extremely slow growth and follow predictable anatomical distributions.

Clinical Indications for Torus Removal Surgery

Because tori are non-malignant and physiologically harmless, active intervention is not required in the majority of cases. However, surgical reduction becomes necessary when the lesion causes persistent clinical or functional impairment. The most frequent indication for torus removal surgery is the construction of removable dental prostheses, including complete or partial dentures. A torus prevents the achievement of an adequate peripheral seal, creates unstable fulcrum points that cause denture rocking and chronic ulceration, and leaves insufficient space for the acrylic or metal framework.

Additional surgical indications include chronic, non-healing mucosal trauma where conservative dietary modifications have failed, severe interference with normal speech and deglutition, and psychological distress regarding the physical mass. In dental implantology and pre-prosthetic surgery, tori are increasingly excised to serve as an autogenous (patient's own) cortical bone graft donor site to reconstruct atrophic alveolar ridges. Furthermore, large mandibular tori may obstruct the fit of mandibular advancement devices used to manage obstructive sleep apnoea, necessitating pre-treatment surgical reduction.

Step-by-Step Surgical Procedure for Torus Excision

Torus removal surgery, termed ostectomy or osteoplasty, is performed as an outpatient procedure under local anaesthesia, often supplemented with conscious intravenous sedation for anxious patients. For a torus palatinus, a midline linear incision with anterior and posterior oblique releasing incisions (a 'double-Y' incision) is carefully created through the mucosa and periosteum. For a torus mandibularis, a sulcular (crestal) incision is made along the gingival margins of the lingual teeth with careful vertical extensions. A full-thickness mucoperiosteal flap is then gently elevated using periosteal elevators, taking extreme care not to tear the exceptionally fragile, paper-thin soft tissues.

Once the bony mass is fully exposed, surgical bone removal proceeds using continuous sterile saline irrigation to prevent thermal osteonecrosis (bone damage from overheating). The torus is either sectioned into smaller fragments using a fissure bur on a surgical handpiece or cross-grooved and carefully cleaved at its base using sharp, fine osteotomes (surgical chisels) and a surgical mallet. Alternatively, modern piezosurgery units—which utilise ultrasonic micro-vibrations—can be used to selectively cut bone without damaging adjacent delicate soft tissues or neural bundles.

Following bone reduction, the residual osseous base is smoothed with a rotary vulcanite bur or a manual bone file until it seamlessly matches the surrounding natural skeletal contours. The surgical site is vigorously debrided with sterile saline to eliminate all micro-fragments and bone dust. The mucoperiosteal flaps are repositioned and secured with interrupted or continuous resorbable or non-resorbable sutures. For palatal procedures, an acrylic surgical splint (stent) lined with a tissue conditioner is frequently inserted to hold the flap firmly against the palatal vault and prevent the collection of a blood clot beneath the tissue.

Postoperative Recovery, Healing Timeline, and Aftercare

The postoperative recovery trajectory follows a distinct sequence. During the initial 48 to 72 hours, patients should expect mild to moderate local discomfort, localized swelling, and minor oozing of blood, all of which are managed with prescribed analgesics and cold compress application to the external facial tissues. A soft, cool, non-abrasive diet is mandatory during the initial recovery phase, avoiding spicy, acidic, or hard foods that could irritate the surgical site. Patients must avoid vigorous spitting, using drinking straws, or smoking, as negative intraoral pressure can disrupt the surgical flap and dislodge primary blood clots.

Patients are instructed to initiate gentle warm salt water rinses or use a 0.2% chlorhexidine gluconate antimicrobial mouthwash starting 24 hours after surgery to maintain oral hygiene without mechanically traumatising the healing tissues. Re-epithelialisation (healing of the outer tissue layer) typically occurs within 14 to 21 days, although complete maturation and remodelling of the underlying dense cortical bone continues beneath the surface for several months. Non-resorbable sutures are generally removed at an outpatient review appointment 7 to 14 days postoperatively.

Potential Surgical Complications and Clinical Management

While torus removal surgery is considered a predictable and safe procedure, specific complications can occasionally occur. The most common minor complication is mucosal flap dehiscence (separation of the wound edges) or localized tissue necrosis, which arises from the inherent thinness and tenuous vascular supply of the stretched palatal or lingual mucosa. If dehiscence occurs, it is managed conservatively with antimicrobial rinses and close monitoring; the exposed bone typically granulates over by secondary intention over a period of 3 to 6 weeks.

More significant surgical risks depend on the anatomical location. In palatal procedures, overzealous bone reduction can inadvertently perforate the floor of the nasal cavity or create an oronasal fistula, requiring meticulous multilayered soft-tissue closure. In mandibular resections, deep dissection risks damaging the lingual nerve, potentially causing temporary or permanent paresthesia (altered sensation or numbness) of the lateral tongue and floor of the mouth. Furthermore, severe bleeding from the sublingual vascular network can lead to an expanding sublingual haematoma, which can elevate the tongue and precipitate life-threatening airway compromise, requiring emergency surgical decompression.

Long-Term Maintenance and Red Flag Symptoms

Following complete wound healing and tissue maturation, the long-term prognosis after torus removal surgery is excellent. True recurrence of an excised torus is relatively rare, though minor re-growth of hyperostotic bone can occur over many years if the underlying predisposing factors—most notably severe bruxism and unmitigated occlusal stress—remain unmanaged. For this reason, the long-term clinical maintenance protocol frequently involves constructing a custom nocturnal occlusal splint (nightguard) to distribute masticatory forces evenly across the dental arches and protect both remaining dentition and healing bony surfaces.

Patients must be equipped with clear instructions on post-surgical warning signs that warrant immediate clinical attention. Urgent red flags include: rapidly progressive swelling in the floor of the mouth or neck; difficulty breathing, swallowing, or speaking (stridor or respiratory distress); persistent, bright red, pulsatile oral hemorrhage that does not abate with continuous direct pressure; a body temperature exceeding 38.3°C; expanding purulent drainage from the surgical incision; or progressive neurosensory deficits affecting the tongue, lower lip, or chin.

Evidence and further reading

The contemporary management of tori is established within clinical oral and maxillofacial surgical literature, reflected in clinical guidance from organisations such as the British Association of Oral and Maxillofacial Surgeons (BAOMS), the American Association of Oral and Maxillofacial Surgeons (AAOMS), and the FDI World Dental Federation. Consensus literature published in peer-reviewed authorities—including the *International Journal of Oral and Maxillofacial Surgery*, the *Journal of Oral and Maxillofacial Surgery*, and *Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology*—consistently advocates for conservative, non-surgical observation in the absence of functional limitation or pre-prosthetic requirements.

Clinical trials and systematic evaluations comparing traditional rotary osteotomy with ultrasonic piezosurgery demonstrate that piezosurgery provides improved intraoperative soft-tissue protection and reduced postoperative swelling, albeit with slightly extended operative duration. Research into autogenous bone harvesting also validates the use of excised palatal and mandibular tori as biologically compatible, viable donor bone for local pre-implant alveolar ridge augmentation, reinforcing that surgical excision should be guided by objective structural, functional, or reconstructive indications.