PubMed · 4510121
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H J Menzel. 1972-12-01. [Apricoectomy as a complement to root canal therapy].. https://pubmed.ncbi.nlm.nih.gov/4510121/
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This study was designed to enumerate the number of perforations to the maxillary sinus while performing apicoectomy on maxillary premolar and molar teeth and to evaluate possible complications as a result of these perforations. A total of 472 apicoectomies were performed in 440 patients; perforations occurred in 10.4% of teeth, 23% in molars, 13% in second premolars and 2% in first premolars. No cases of acute or chronic sinusitis were recorded. It was concluded that apicoectomy, carried out using a meticulous surgical technique and proper postoperative care, should be considered as a treatment option before contemplating extraction.
OBJECTIVES: This study compared the surface topography of roots resected with #57, Lindeman, and Multi-purpose burs. Further comparisons were made after refinements with either a multifluted carbide or an ultrafine diamond finishing bur. STUDY DESIGN: Three groups of single-rooted human teeth were resected with each resection bur, and resin replicas of the root ends were made. Root ends from each resection bur group were finished with either a multifluted carbide or an ultrafine diamond finishing bur, and the root ends were replicated. All replicas were evaluated at a magnification of x20 for smoothness and surface irregularities. Data analysis was done with the Wilcoxon signed rank test and the chi-square test at a significance level of p < 0.05. RESULTS: The Multi-purpose bur produced a smoother and more uniplanar surface than the #57 bur and caused less damage to the root than either the #57 or the Lindeman bur. The multifluted carbide finishing bur tended to improve the smoothness of the root end, while the ultrafine diamond tended to roughen the surface. CONCLUSIONS: The Multi-purpose bur produced the smoothest and most uniplanar resected root-end surface with the least root shattering. The multifluted carbide finishing bur produced a smoother surface than the ultrafine diamond bur.
The therapy of dilacerated permanent anterior teeth usually involves surgically removing the tooth. Subsequently, orthodontic methods for closing the space or keeping it open are preferred until the patient reaches an age when definitive implantological or prosthetic treatments may be used. Anterior tooth transplantation should be considered as an alternative to surgically extracting the tooth. This study describes a period of investigation covering 3 years during which neither replacement resorption nor inflammatory resorption was diagnosed in the five transplanted teeth. The clinical tooth mobility was similar to that of the adjacent teeth. In spite of the vertical loss of bone shown radiographically no pathologically enlarged pockets or recessions have been found. It is not yet possible to make any comments on the prognosis for the long term.