The Use of Rim Excision as a Treatment for Canine Acanthomatous Ameloblastoma

Abstract

This study reviews rim excision as a treatment for canine acanthomatous ameloblastomas (CAA) in dogs with <3 mm of bone involvement. Removal of a canine tooth was involved in 47% of the cases; 33% cases involved the caudal dentition. Follow-up ranged from 3 months to 5 years. No evidence of recurrence was seen. Client satisfaction with cosmesis and the animal's ability to masticate was judged to be good. With appropriate case selection, rim excision appears to be a viable option for CAA and results in improved dental occlusion, cosmesis, and no evidence of epulis recurrence.

Biomechanical comparison of two ostectomy configurations for partial mandibulectomy

“…The extent and location of mandibulectomy is tailored to the tumour dimension and the goal of tumour-free margins. Rim excision is most appropriate for gingival lesions or lesions with minimal bone involvement (16). Case selection for rim mandibulectomy is paramount and should be determined by a number of factors.…”

“…Another benefit may include maintenance of normal tongue carriage when mandibular canine tooth crowns are preserved. Previous case reports and case studies involving rim excision are available (9,12,16). Crescentic mandibular ostectomy has been recommended based on the assumption that right-angled excisions result in development of unnecessary stress risers (9,12,16).…”

“…Previous case reports and case studies involving rim excision are available (9,12,16). Crescentic mandibular ostectomy has been recommended based on the assumption that right-angled excisions result in development of unnecessary stress risers (9,12,16). Additionally, crescentic ostectomy may be more appropriate as neoplastic growth generally follows an elliptiform pattern, and a crescentic excision results in less bone removal, as it follows the lesion more closely (10).…”

Odontogenic Fibromyxoma in a Cat: First Confirmed Case in This Species

“…Options for removal of the gingival mass were discussed, including gross debulking of the soft tissue, segmental mandibulectomy, unilateral mandibulectomy, and dorsal rim excision. 5,6 Dorsal rim excision (marginal mandibulectomy or crescentic osteotomy) alleviates complications that may follow unilateral or segmental mandibulectomy. 7,8 Among these complications are mandibular drift with soft tissue trauma, difficulty prehending food, interruption of the blood supply to ipsilateral teeth rostral to the surgical site, and tongue protrusion on the affected side.…”

Acanthomatous ameloblastoma with atypical foci in five dogs

“…13 If complete excision can be achieved, the prognosis is good, with 98-100% of dogs having no signs of recurrence 1-2 y after complete excision. 5,11 The disease-free interval following complete excision has been previously reported as 22.5 mo. 5 Radiation therapy has been advocated in cases in which complete excision cannot be achieved because of the size or location of the tumor, 7 but radiation has been associated with novel oncogenesis at the irradiated site.…”