Biomedical subjects
Publications and source records attributed to L Summers.
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Two cases of false ankylosis of the temporo-mandibular joint following elective neurosurgery are described. The possible causation of this condition is discussed.
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Two cases of recurrent desmoplastic fibroma are reported and the relevant literature reviewed. In both cases the original lesion was incompletely removed more than 10 years previously and the slow but aggressive spread of the recurrences is documented. Desmoplastic fibromas are locally invasive tumors and primary surgical excision should be accomplished together with a margin of normal tissue. The second case also presented with an associated amputation neuroma and this topic is briefly discussed.
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The use of implanted sulfathiazole to obliterate undercut alveolar ridges has given good results. The mechanism whereby this drug effects this change has been investigated with dogs as experimental models. It was found that a fibroplastic proliferation occurred that was possibly due to an irritative stimulus on the periosteum.
The Kasabach-Merritt syndrome comprises consumption coagulation associated with giant haemangioma. A case is reported of disseminated intravascular coagulation complicating dental extraction in a 36-year-old male with this syndrome. The pre-operative management with anticoagulant therapy is discussed and the relevant literature reviewed.
The teeth of two patients requiring preprosthetic segmental surgery were removed between 4 and 10 weeks postoperatively. The pulps of these teeth were examined histologically using sound teeth from patients of the same age as controls and it was generally found that the teeth from the repositioned segment retained their vitality; there was progressive degeneration of nerves except for the nonmyelinated nerves of the autonomac nervous system, which remained intact.
Condylar fractures with or without disruption of the temporo-mandibular joint occur commonly with other facial injuries. The subsequent development of ankylosis presents surgical and anaesthetic problems in management and results in severe physical disability to the patient. Oro-nasal fistula is a rare complication of fractures involving the middle third of the facial skeleton, and two cases are reported.
Small sections of granulomas containing proliferating epithelium were incubated with a radio-opaque marker (Thorotrast) and tissue culture medium. Electron microscopic examination demonstrated that some epithelial cells had the potential to take up the marker whereas in control sections of apical cysts this did not occur. The implications of these results are discussed.
The removal of fractured teeth and retained tooth roots is described in a systematic fashion, with emphasis being placed on such procedures being carried out in general practice. The discussion is aimed at producing sound treatment planning and sequential action in order to achieve best results for patient and surgeon.
Malposed mandibular and maxillary premolars and canines often cause great difficulties in removal. The ways in which these procedures are accomplished are described in detail.
Methods of pre-operative assessment of impacted lower third molar teeth are discussed and the main diagnostic features are stressed in order to ensure that the pracitioner fully comprehends the nature and difficulty of the procedure.
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Apicoectomy is a frequently performed operation. In order to produce consistently good results the operation and its varieties are described, with stress being placed on correct assessment of each case prior to surgery.