Temporomandibular Joint (TMJ) ankylosis is a condition in which condylar movement is limited by a mechanical problem in the joint.
Trauma is the most common cause of bony ankylosis.
In bony ankylosis, what is called (true joint Ankylosis) the condyle disc controlled growth Is enlarged to a size that the joint fossa is over filled with the ankylosis mass to a point that the jaw is locked to a minimal or no movement. In very rare cases the ramus is attached to the temporal or zygomatic bone by an osseous bridge.
Most unilateral cases are caused by mandibular trauma that damaged the disc, for the condylar part to grow in unnormal and controlled way to cause the state of ankylosis.
TMJ ankylosis in children, with its massive effect and disturbance on the mandibular growth is a matter. The gross deformity, limited mouth opening, will lead to condition usually effecting children and young adults. It causes problems in mastication, speech, appearance, poor general health and oral hygiene.
Here we report a case of unilateral TMJ ankylosis in a 14 year-old girl.
Keywords:Temporomandibular; Joint; Ankylosis; Condylar; Movement; Disc, Gap Surgery

Background: The main objective is to clinically assess the temperature changes during external, internal and combined irrigation while performing osteotomy for implant placement. The aim of the present study was to compare and evaluate the temperatures that were generated under external, internal and combined irrigation technique during intermittent osteotomy drilling for implant placement. A randomized controlled clinical trial was planned to compare the differences in temperature changes among the three modes of irrigation.
Method: The study population consisted of 30 patients aged between 18 – 75 years who underwent implant placement in the maxillary or mandibular region. Temperature changes that were generated under external, internal and combined irrigation techniques during intermittent osteotomy drilling for implant placement were evaluated using K type thermocouple and compared Clinical and radiographical parameters recorded and the outcomes were assessed.
Results: The results of the current trial show that (31.6ᵒC, 32.1ᵒC and 32.5ᵒC) was obtained for initial drill, (31.8ᵒC, 31.8ᵒC and 32.3ᵒC) for intermediate drill and (31.6ᵒC, 31.5ᵒC and 32.4ᵒC) for final drill at three different time thus, there is no difference between internal, external and combined irrigation in terms of heat generation.
Conclusion: All three methods of irrigation provides similar cooling during drilling.
Keywords:Dental Implantology; External Irrigation; Internal Irrigation; Thermocouple