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PubMed1971

Tooth extraction.

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Orthodontics, Corrective↗
PubMed1990

Helium-neon laser therapy in the prevention of postoperative swelling and pain after wisdom tooth extraction.

Seventeen patients with symmetrically embedded lower wisdom teeth were selected for this study, intended to evaluate the local effect of soft laser therapy on postoperative pain. Both lower third molars were removed in the same operation. The test side, chosen by lot, was treated using a helium-neon laser (632,8 nm, 8 mW, 50 Hz) for 2 minutes. The other side served as the untreated control side. Facial swelling was measured using a modification of the face-bow technique. Postoperative pain was estimated using a visual analogue scale (VAS). When it became apparent that conventional statistical analysis was revealing no difference in postoperative swelling and pain between the test and the control groups, the study was discontinued for ethical reasons.

Adult↗
PubMed1980

Histologic study of the effects of occlusal hypofunction following antagonist tooth extraction in the rat.

A histologic study was done to observe the influence of occlusal hypofunction on periodontal tissues and the physiologic drift process, and to elucidate the origin of periodontal ligament narrowing. Twenty-four Wistar rats were used. Hypofunction was induced by extracting the right maxillary molars. Histologic observations were reported on the right lower jaws which were fixed, decalcified, sectioned and stained according to classical histologic methods. Two groups of five animals each were used for a complementary study study using sequential fluorescent labeling in order to evaluate the bone formation rate. After 15 days of hypofunction, the periodontal ligament was obviously narrowed and its structure was disorganized. Woven-bone formation was noted at the top of the interradicular septa, at the bottom of the sockets and along their modeling sides. At 30 days and at intervals up to 3 months, the periodontal ligament remained disorganized and narrowed. The newly-formed bone was engaged in a maturation process. Nevertheless, osteoporosis was also observed at the inferior part of the interradicular septa. Fluorescent labeling confirmed the histologic findings and showed that the induced bone formation is related to periodontal ligament narrowing and the supra-eruption process.

Alveolar Process↗