Anterior lingual mandibular bone concavity. Report of a case

A lingual mandibular bone concavity in the central incisor region is described. The radiographic appearance of the concavity in this area is an uncommon finding. A review of the literature is presented along with the report of this case. An exact diagnosis of this lesion can be made only by surgical intervention and histologic examination. However, the axial occlusal radiographic view is thought to be helpful in diagnosing this lesion clinically.     

Anterior lingual mandibular bone concavity. Report of a case.

A lingual mandibular bone concavity in the region of the left canine is described. The radiographic appearance of the concavity in this anterior location is an uncommon finding. Seven similar bone cavities with soft-tissue contents beneath the periosteum have been reported in the literature. Surgical exploration revealed this cavity to have no contents subperiosteally.     

Fracture and displacement of lingual cortical plate of mandibular symphysis following bone harvesting: case report

This article describes a unique complication after chin bone harvesting. The complication consisted of fracture and posterior displacement of the lingual cortical plate that did not occur at the time of the operation but during the healing phase. The bone was harvested for a bilateral sinus lift procedure. Diagnosis was made by chance with the aid of a postoperative CT scan that was taken to study the sinus area. The mandibular scans revealed a bony fragment 2 to 4 mm in width and 3 cm in length fractured and displaced 1 cm posteriorly. This bony fragment was pedicled to the geniohyoid and genioglossus muscles. The patient was asymptomatic, and no treatment was carried out. The patient is still symptom-free 16 months after the initial diagnosis of the fracture.     

A diagnostic challenge: anterior variant of mandibular lingual bone depression

Mandibular lingual bone depressions are considered to be developmental anomalies and most clinicians are familiar with the posterior variant (known as Stafne's bone cavity) that occurs in lingual mandibular molar regions, adjacent to the submandibular gland and below the mandibular canal. The anterior variant of the mandibular lingual bone depression is an asymptomatic bone cavity that occurs adjacent to the sublingual gland in the anterior mandible. Radiographically, it appears as a well-corticated radiolucency that retains a normal trabecular pattern internally. CT imaging is diagnostic and avoids surgical and sialographic procedures. This article reviews radiographic and CT features of a case involving the anterior variant of mandibular lingual bone depression.     

Distraction osteogenesis in an anterior mandibular bone defect utilizing lingual periosteal release: a case report

This clinical report presents a modified distraction technique to achieve height in the vector of distraction. The success of distraction osteogenesis depends on both biologic and biomechanical factors. The focus in this case is on correcting the direction of distraction; incorrect distraction direction is a frequent complication associated with distraction osteogenesis in the mandible. A 21-year-old man presented with a 10-mm vertical bone defect in the anterior mandible caused by facial trauma. The treatment chosen was distraction osteogenesis. After osteotomizing a bone segment and slitting the lingual periosteum, the bone segment was advanced anteriorly 4 mm and an extra-alveolar distraction device was applied. This approach allows the distraction device to be placed vertically, thus preventing lingual shift. The newly created alveolar ridge fully met prosthodontic requirements for a predictable outcome.     

Cross-sectional analysis of the mandibular lingual concavity using cone beam computed tomography

Objectives: To study the prevalence and the degree of lingual concavity in the edentulous first molar region from cone beam computed tomography (CBCT) scans of the mandibles. Material and methods: Qualified cross‐sectional images in mandibular first molar edentulous region taken from CBCT were selected. The mandible morphology 2 mm above the inferior alveolar canal (IAC) was classified into the convex (C), parallel (P) and undercut (U) type, based on the presence of lingual concavity and the shape of alveolar ridge. The prevalence of each group was determined. Subsequently, the lingual concavity characters, including the depth, the angulation and the vertical location were determined by the measurements of selected anatomic landmarks. Results: One hundred and three subjects (mean age 51 with a range of 23.7–70.4 years) were studied. The U type was the most prevalent, accounting for 66% of the study population. The mean undercut depth and angulation at the level 2 mm above IAC were on average 2.4 mm and 57.7°. The mean vertical distances from the most prominent point (P) of the lingual concavity to the cemento‐enamel junction of second premolar and the inferior border of the mandible were 11.7 and 14.9 mm, respectively. Conclusions: The anatomic location and the degree of the lingual concavity presented in this article add more information in implant treatment planning in the mandibular first molar edentulous region. To cite this article:
Chan H‐L, Brooks SL, Fu J‐H, Yeh C‐Y, Rudek I, Wang H‐L. Cross‐sectional analysis of the mandibular lingual concavity using cone beam computed tomography.
Clin. Oral Impl. Res. 22 , 2011; 201–206.
doi: 10.1111/j.1600‐0501.2010.02018.x     

Treatment of mandibular anterior crowding with incisor extraction using lingual orthodontics: a case report

A 20-year-old woman presented with a labially displaced mandibular right central incisor with severe attrition. Her maxillary dentition was well-aligned, and she had a straight profile. The respective central incisor was extracted. Subsequently, all teeth were aligned and the extraction space was closed with 2D lingual brackets. The result was esthetically pleasing.     

Idiopathic lingual mandibular bone "depression"

A case of Stafne's idiopathic lingual bone depression is described. This occurred in the classical position below the mandibular molars. On surgical exploration, the defect was found to contain a lymph node rather than the more usual salivary tissue. This may throw some light on the possible etiology of this condition.     

Immediate load protocol for anterior maxilla with cortical bone from mandibular ramus

OBJECTIVE: To evaluate the concept of a nonfunctional immediate load protocol with single implants placed in the anterior maxilla that has been bone grafted with autogenous, block cortical grafts harvested from the ramus of the mandible. METHODS: There were 19 hydroxyapatite-coated dental implants surgically placed in 19 patients, and immediately loaded between 48 hours and 3 days later with a custom acrylic provisional restoration that was placed out of functional occlusion. After 12 weeks, the definitive ceramo metal restoration was cemented to the custom abutment. RESULTS: Over a 1-year observation period, all implants continue to function. CONCLUSION: The preliminary results of this clinical study indicate that immediate, nonfunctional load with single implants is a predictable protocol in the bone grafted anterior maxilla in select cases.     

Labial bone concavity

Labial bone concavities are entities that can be mistaken radiographically for disease. Clinicians should be aware of them in order to make a proper diagnosis. In the area of the concavity, the bone is thinned and appears more radiolucent than the adjacent bone. Concavities are noted in the maxilla and in the mandible, usually in the anterior regions. In contrast to the Stafne defect, which is not easily amenable to palpation or visualization except by radiograph, labial concavities are palpable and are often visualized as an indentation in the area of the noted radiolucency. Radiographically, they may appear as defined radiolucencies, similar to a cyst, or with a ground-glass pattern, similar to a fibro-osseous disease. The reasons for their presence may vary from a congenitally missing tooth, a prominent canine fossa (due to anatomy or to a missing tooth), a malposed tooth, an anatomical variation, or a surgical defect. Once the diagnosis is made, no further treatment is recommended.     

Lingual mandibular bone defect. Case report and review of the literature

An unusual case of lingual mandibular bone defect (Stafne's bone cavity) is presented in which the lesion extended to above the inferior dental canal and caused expansion of the buccal cortical plate. The literature is reviewed with regard to the incidence, plausible aetiologic factors and methods of investigation of such lesions.